Maintaining the version interfaces was complicated by the fact that each interface needed to be in separate compilation unit to avoid type conflicts. This also meant that various build/test files needed to be updated to add the new interfaces.
Solve these problems by auto-generating all the interfaces into a single file. This is made possible by parsing defines and types out of the header files and creating macros to rename the types. At the end of the version interface everything is undef'd. Another benefit is that the auto-generated interfaces can be static and included directly into postgres/interface.c.
Since some code generation is now always required for tests, change --no-gen to --min-gen in test.pl.
It would also make sense to auto-generate the version defines in postgres/version.h, but that will be left for a future commit.
Meson is a new build system that offers simpler syntax and superior performance to autoconf/make. In addition, Windows is supported natively.
The Meson build appears complete, but currently is used only for auto-generation of code and the host build of pgbackrest. Some container upgrades will be required before Meson can be used for container builds.
Also patch the Debian package to force autoconf/make rather than Meson.
These files were never intended to be compiled on their own so the .c extension was a bit misleading. In particular Meson does not like .c files that are not intended to be compiled independently.
Leave header files as is since they are already protected against being included more than once and are never expected to be compiled.
Most internal options were being skipped, but not in the case where an option was marked internal for a specific command.
The command-line help was not affected by this issue.
The manifest is saved on a regular basis during a backup so a failed backup can be resumed. For backups that the user has configured/invoked as not resumable, skip the incremental save of the manifest.
Waiting to write percent complete until the first file completed resulted in a period of time where the backup was running without status available to the user.
Remedy this by initializing percent complete to zero when the backup is ready to start copying files.
Previously the behavior was to download the file from the repository when it was not exactly the same size in PGDATA. However, it may just be that the file was extended and the contents are the same up to the file size recorded in the manifest. This could also be very valuable for files that are always append only, like logs.
Change info.size to file->size in one place. Both are technically correct but file->size makes more sense.
Use the new fileName variable in a few existing places.
Also adjust some existing comments to make them clearer.
Each mem context can track child contexts, allocations, and a callback. Before this change memory was allocated for tracking all three even if they were not used for a particular context. This made mem contexts unsuitable for String and Variant objects since they are plentiful and need to be as small as possible.
This change allows mem contexts to be configured to track any combination of child contexts, allocations, and a callback. In addition, the mem context can be configured to track a single child context and/or allocation, which saves memory and is a common use case.
Another benefit is that Variants can own objects (e.g. KeyValue) that they encapsulate. All of this makes memory accounting simpler because mem contexts have names while allocations do not. No more memory is used than before since Variants and Strings still had to store the memory context they were originally allocated in so they could be easily freed.
Update the String and Variant objects to use this new functionality. The custom strFree() and varFree() functions are no longer required and can now be a wrapper around objFree().
Lastly, this will allow strMove() and varMove() to be implemented and used in cases where strDup() and varDup() are being used to move a String or Variant to a new context. Since this will be a bit noisy it is saved for a future commit.
For some reason /lib/systemd/system/sysinit.target.wants no longer exists in the rockylinux:8 container.
Create this directory explicitly in case it does not exist.
Bug Fixes:
* Fix error thrown from FINALLY() causing an infinite loop. (Reviewed by Stephen Frost.)
* Error on all lock failures except another process holding the lock. (Reviewed by Reid Thompson, Geir Råness. Reported by Geir Råness.)
Features:
* Backup file bundling for improved small file support. (Reviewed by Reid Thompson, Stefan Fercot, Chris Bandy.)
* Verify command to validate the contents of a repository. (Contributed by Cynthia Shang, Reid Thompson. Reviewed by David Steele, Stefan Fercot.)
* PostgreSQL 15 support. (Reviewed by Stefan Fercot.)
* Show backup percent complete in info output. (Contributed by Reid Thompson. Reviewed by David Steele.)
* Auto-select backup for restore command --type=lsn. (Contributed by Reid Thompson. Reviewed by Stefan Fercot, David Steele.)
* Suppress existing WAL warning when archive-mode-check is disabled. (Contributed by Reid Thompson. Reviewed by David Steele.)
* Add AWS IMDSv2 support. (Contributed by Nuno Pires. Reviewed by David Steele.)
Improvements:
* Allow repo-hardlink option to be changed after full backup. (Reviewed by Reid Thompson.)
* Increase precision of percent complete logging for backup and restore. (Contributed by Reid Thompson. Reviewed by David Steele.)
* Improve path validation for repo-* commands. (Contributed by Reid Thompson. Reviewed by David Steele.)
* Improve stop command to honor stanza option. (Contributed by Reid Thompson. Reviewed by David Steele. Suggested by ragaoua.)
* Improve error message for invalid repo-azure-key. (Contributed by Reid Thompson. Reviewed by David Steele. Suggested by Seth Daniel.)
* Add hint to check the log on archive-get/archive-push async error. (Reviewed by Reid Thompson.)
* Add ClockError for unexpected clock skew and timezone changes. (Reviewed by Greg Sabino Mullane, Stefan Fercot. Suggested by Greg Sabino Mullane.)
* Strip extensions from history manifest before showing in error message. (Reviewed by Stefan Fercot.)
* Add user:group to lock permission error. (Reviewed by Reid Thompson.)
Documentation Bug Fixes:
* Fix incorrect reference to stanza-update in the user guide. (Fixed by Abubakar Mohammed. Reviewed by David Steele.)
* Fix example for repo-gcs-key-type option in configuration reference. (Reviewed by Reid Thompson.)
* Fix tls-server-auth example and add clarifications. (Reviewed by Reid Thompson.)
Documentation Improvements:
* Simplify messaging around supported versions in the documentation. (Reviewed by Stefan Fercot, Reid Thompson, Greg Sabino Mullane.)
* Add option type descriptions. (Contributed by Reid Thompson. Reviewed by David Steele.)
* Add FAQ about backup types and restore speed. (Contributed by David Christensen. Reviewed by Reid Thompson.)
* Document required base branch for pull requests. (Contributed by David Christensen. Reviewed by Reid Thompson.)
If the user requested the exact repo path then strSub() would be passed an invalid start value leading to an assertion:
$ pgbackrest --stanza=test repo-ls /var/lib/pgbackrest
ASSERT: [025]: start <= this->pub.size (on dev builds)
ASSERT: [025]: string size must be <= 1073741824 bytes (on prod builds)
Fix this by checking if the requested path exactly equals the repo path and returning an empty relative path in this case.
Another issue was that invalid subpaths were not detected if they started with the repo path. For example, /var/lib/pgbackrestsub would not generate an error if the repo path was /var/lib/pgbackrest. Fix this by explictly checking for a / between the repo path and the subpath. This also requires special handling when the repo path is /.
This is not a live bug since the issues were found in an unreleased feature introduced in 5ae84d5.
Integration expect log testing was originally used as a rough-and-ready way to make sure that certain code paths were being executed before the unit tests existed. Now that we have 100% unit test coverage (with expect log testing) the value of the integration expect tests seems minimal at best.
But they do cause numerous issues:
- Maintenance of the expect code and replacements that are required to keep logs reproducible.
- Even a trivial change can cause massive churn in the expect logs, e.g. d9088b2. These changes should be minutely audited but since the expect logs have little value now it is seldom worth the effort.
- The OS version used to do expect testing (RHEL7) can only be used to test one version of PostgreSQL. This makes it hard to balance the PostgreSQL version testing between OS versions.
- When a commit affects expect logs it is not clear (especially for new developers) how to regenerate them and our contributing guide is silent on the issue.
The goal is to migrate the integration tests to C and expect testing is not part of that plan. It seems best to get rid of them now.
The version ranges given in the user guides caused confusion. For example, because the user guide for RHEL specified PostgreSQL 9.6-11, users questioned whether pgBackRest worked for PostgreSQL 12 on RHEL.
Remove these ranges and add more explanatory text to the introduction to try and make it clearer how the user guides work and which versions are covered (basically all of them).
The function worked fine, but Coverity was unable to determine that the finally block was run, which led to false positives about unfreed memory.
Using a boolean in the block makes it clear to Coverity that the finally block will always be run no matter what else happens.
We'll depend on the compiler to optimize away the boolean if it is not used in a finally block. The cost of the boolean is fairly low in comparison to everything else being done in these macros, so it does not seem worth having a separate block even if the compiler is not able to eliminate the boolean.
This reverts most of 9a271e9 that fixed a bug caused by c5b5b58, which was also attempting to help Coverity understand FINALLY() blocks.
Dividers were used in some files, but not others, and some had section names (which are hard to maintain) and others did not.
Try to make this more consistent by putting a divider on front of every section, variable block, and wherever else seems appropriate.
In cases where clock skew or timezone issues are preventing backup label generation the user could see an error like this:
new backup label '20220504-152308F' is not later than latest backup label '20220504-222042F_20220504-222141I.manifest.gz'
This will happen if the most recent label is drawn from the history. It is cleaner (and probably less confusing) to strip off the extensions so the user sees:
new backup label '20220504-152308F' is not later than latest backup label '20220504-222042F_20220504-222141I'
The order of callbacks and frees meant that memory needed during a callback (for logging in all known cases) might end up being freed before a callback needed it.
Requiring callbacks and logging to check the validity of their allocations is pretty risky and it is not clear that all possible cases have been accounted for.
Instead recursively execute all the callbacks first and then come back and recursively free the context. This is safer and it removes the need to check if a context is freeing so a simple active flag (in debug builds) will do. The caller no longer needs this information at all so remove memContextFreeing() and objMemContextFreeing().
In the JSON output the percent complete is storage as an integer of the percent complete * 100. So, before display it should be converted to double and divided by 100, or split using integer mod and div.
Note that percent complete will only be displayed on the host where the backup was executed. Remote hosts will show a backup/expire running with no percent complete.
PostgreSQL 15 drops support for exclusive backup and renames the start/stop backup commands.
This is based on the pgdg-testing repo since beta1 has not been released yet, but it seems unlikely that breaking changes will be made at this point. beta1 should be tagged just before our next release so we'll retest before the release.
This column has been removed in PostgreSQL 15. Rather than add a lot of special handling, it seems better just to update all versions to not depend on this column.
Add centralized functions to identify the type of database (i.e. system or user) by name and use FirstNormalObjectId when a name is not available.
The new query in the db module will still return the prior result for PostgreSQL <= 15, which will be stored in the manifest. This is important to preserve behavior when downgrading pgBackRest. There are no concerns here for PostgreSQL 15 since older versions of pgBackRest won't be able to restore backups for PostgreSQL 15 anyway.
Any error thrown resets execution to the last setjmp(), which means that parts of the try block need to make sure they don't get run again. FINALLY() was not doing this so if it threw an error it would end up back in the FINALLY() block, where the error would likely be thrown again, causing an infinite loop.
Fix this by tracking the state of FINALLY() and only running it once. This requires cleaning the error stack like CATCH*() and clearing the error like TRY_END() depending on the order of execution.
The archive-get/archive-push commands would not error for, .e.g permissions errors, when attempting to get a lock before launching the async process. Since the async process was not launched there would be no error status file and the user would get a generic failure message. Also, there would be no async log.
Refactor lockAcquireFile() to throw an error when failOnNoLock = false unless the file is locked by another process. This seems to be the original intent of this parameter and there may have been a mistake when porting from Perl. In any case it looks wrong enough to be considered a bug.
If this error is thrown rather than a specific error returned from the async process, it means the async process is unable to write the status files for some reason and the only way to get the error is out of the async log.
This hint includes the exact async log path and name to make finding errors easier.
Previously read/writing JSON required parsing/render via a variant, which add many more memory allocations and loops.
Instead allow JSON to be read/written serially to improve performance and simplify the code. This also allows us to get rid of many String and Variant constant which are no longer required.
The goal is to be able to read/write very large (e.g. gigabyte manifest) JSON structures, which would not be practical with the current code.
Note that external JSON (GCS, S3, etc) is still handled using variants. Converting these will require more consideration about key ordering since it cannot be guaranteed as in our own formats.
Packs support stronger typing than JSON and are more efficient. For the small result sets that we deal with efficiency is probably not very important, but this removes another place where we are using JSON instead of Pack.
Push checking for result struct (e.g. single row) down into PgClient since it has easy access to this information rather than needing to parse the result set to find out.
Refactor all code downstream that depends on PgClient results.
Previously the process id was skipped if it did not exist. Instead, throw an error and handle the errors in downstream code.
This was probably ignored at some point to provide backward-compatibility, but that is no longer required, if it ever was.
Sometimes we need to read a lock from another process. This was done two different ways and in the case of cmdStop() was definitely hacky.
Centralize the logic to make it easier to read the locks for another process. This will also make it easier to add new lock data.
When archive-mode-check is disabled and archive-push is running from multiple hosts, it is very likely that the file will already exist with the same checksum, so disable the warning.
However, if the checksums do not match, an error will still be thrown.
If a boolean option had an unresolved dependency then the value would be NULL, which meant the dependency would need to be checked in the code to avoid an error. For example, cfgOptionBool(cfgOptOnline) needed to be checked before it was safe to call cfgOptionBool(cfgOptArchiveCheck).
Allow a default for boolean options when they are unresolved to simplify the code. This makes using the options easier and less prone to error. Not all boolean options get a dependency default in this commit, but more may be added in the future.
For PITR with --type=lsn, attempt to auto-select the appropriate backup set based on the --target LSN provided. Pick the most recent backup where backup-lsn-stop is less than or equal to the provided LSN.
It is possible that a file will be be truncated to zero-length after the backup manifest has been built. We could build logic into backupFile() to handle this case but it is hard to test well because of the race condition so tests would need to written directly against backupFile() and backupJobResult(). It hardly seems worth all that effort for a condition that occurs rarely, if ever.
Instead just remove the manifest check and add tests to restore to make sure it handles bundled zero-length files correctly. Logging will show that the file was bundled so if it happens a lot (which seems very unlikely) then we can think about an alternate implementation.
This rule was added because there were not sufficient tests to demonstrate that the repo-hardlink option could be changed in a backup set.
Remove the restriction and add/update tests to show that it works.
This is necessary now because bundling requires that hardlinking be disabled. Rather than add code complexity, it seems better just to address this limitation.
Check for invalid path in repo-* commands. Perform path validation and throw an error when appropriate. Path may not contain '//'. Strip trailing '/' from path. Absolute path must fall under repo path.
IMDSv2 provides additional security to prevent instance metadata from being read by an attacker.
All AWS instances should provide IMDSv2 but still fail back to IMDSv1 if the IMDSv2 token request fails. This is in case there are any services outside AWS that are emulating IMDSv1 but have not implemented IMDSv2.
It seems best for these to be repo options so they can be configured per repo, rather than globally.
All clarify usage for repo-bundle-size and repo-bundle-limit.
Since files are stored sequentially in a bundle, it is often possible to restore multiple files with a single read. Previously, each restored file required a separate read. Reducing the number of reads is particularly beneficial for object stores, but performance should benefit on any file system.
Currently if there is a gap then a new read is required. In the future we might set a limit for how large a gap we'll skip without starting a new read.
Improve the stop command, when force and stanza options are specified, to terminate only processes holding lock files for the given stanza. Prior to these changes, termination of all processes holding lock files regardless of stanza occurred.
For very large backups only getting an update per percent may not be often enough.
Add hundredths to the percent complete logging to provide more timely information.
IMPORTANT NOTE: Repository size reported by the info command is now entirely based on what pgBackRest has written to storage. Previously, in certain cases, pgBackRest could detect if additional compression was being applied by the storage but this is no longer supported.
Bug Fixes:
* Retry errors in S3 batch file delete. (Reviewed by Reid Thompson. Reported by Alex Richman.)
* Allow case-insensitive matching of HTTP connection header values. (Reviewed by Reid Thompson. Reported by Rémi Vidier.)
Features:
* Add support for AWS S3 server-side encryption using KMS. (Contributed by Christoph Berg. Reviewed by David Steele, Tharindu Amila.)
* Add archive-missing-retry option. (Reviewed by Stefan Fercot.)
* Add backup type filter to info command. (Contributed by Stefan Fercot. Reviewed by David Steele.)
Improvements:
* Retry on page validation failure during backup. (Reviewed by Stephen Frost, David Christensen.)
* Handle TLS servers that do not close connections gracefully. (Reviewed by Rémi Vidier, David Christensen, Stephen Frost.)
* Add backup LSNs to info command output. (Contributed by Stefan Fercot. Reviewed by David Steele.)
* Automatically strip trailing slashes for repo-ls paths. (Contributed by David Christensen. Reviewed by David Steele.)
* Do not retry fatal errors. (Reviewed by Reid Thompson.)
* Remove support for PostgreSQL 8.3/8.4. (Reviewed by Reid Thompson, Stefan Fercot.)
* Remove logic that tried to determine additional file system compression. (Reviewed by Reid Thompson, Stefan Fercot.)
Documentation Bug Fixes:
* Move repo options in TLS documentation to the global section. (Reported by Anton Kurochkin.)
* Remove unused backup-standby option from stanza commands. (Reported by Stefan Fercot.)
* Fix typos in help and release notes. (Fixed by Daniel Gustafsson. Reviewed by David Steele.)
Documentation Improvements:
* Add aliveness check to systemd service configuration. (Suggested by Yogesh Sharma.)
* Add FAQ explaining WAL archive suffix. (Contributed by Stefan Fercot. Reviewed by David Steele.)
* Note that replications slots are not restored. (Contributed by Reid Thompson. Reviewed by David Steele, Stefan Fercot. Suggested by Christophe Courtois.)
Some TLS server implementations will simply close the socket rather than correctly closing the TLS connection. This causes problems when connection: close is specified with no content-length or chunked encoding and we are forced to read to EOF. It is hard to know if this is a real EOF or a network error.
In cases where we can parse the content and (hopefully) ensure it is correct, allow the closed socket to serve as EOF. This is not ideal, but the change in 8e1807c means that currently working servers with this issue will stop working after 2.35 is installed, which seems too risky.
da0f3a855 used a workaround to get the documentation building on aarch64 but recent changes to the PGDG yum repo have broken this workaround. Installing the regular way still doesn't work, either.
Reverting for now to get the CI pipeline working again.
Docker outputs build info to stderr even when the build is successful. This seems to be especially true on Mac M1.
ContainerTest.pm already does this suppression so add it the other places where containers are built.
Trailing slashes in at least some of the repository storage types were preventing repo-ls from displaying any content (presumably due to storage-specific behavior).
Since the path with the slash should be equivalent to the path without the slash, just remove it if provided by the user.
Checking that pd_upper == 0 is not enough since this field may be corrupted. Still use pd_upper as a quick check, but when it is zero proceed to check the rest of the page to ensure it is also all zeroes.
Rather than attempting to filter page checksum failures by LSN, just retry when there is a page checksum failure. If the page has not changed since the last read report it as an error. If the page has changed, then PostgreSQL must be modifying the page so we can ignore the error because a full page write (and possibly updates) will be in the WAL.
Also remove tests made redundant by the test merge in b4897077.
When there was an issue with the system library path during building, the build-help rule would fail during executing ./build-help with the effect that main.c wouldn't build.
Break out help.auto.c generation from the build-help stage to allow it to be re-executed when the library path has been corrected.
Retry a WAL segment that was previously reported as missing by the archive-get command. This prevents notifications in the spool path from a prior restore from being used and possibly causing a recovery failure if consistency has not been reached.
Disabling this option allows PostgreSQL to more reliably recognize when the end of the WAL in the archive has been reached, which permits it to switch over to streaming from the primary. With retries enabled, a steady stream of WAL being archived will cause PostgreSQL to continue getting WAL from the archive rather than switch to streaming.
When disabling this option it is important to ensure that the spool path for the stanza is empty. The restore command does this automatically if the spool path is configured at restore time. Otherwise, it is up to the user to ensure the spool path is empty.
Coverity complained that this pass by value was inefficient:
CID 376402: Performance inefficiencies (PASS_BY_VALUE)
Passing parameter file of type "ManifestFile" (size 136 bytes) by value.
This was completely intentional since it gives us a copy of the struct that we can change without bothering the caller. However, updating fields is fine and may benefit the caller at some future data, and in any case does no harm now.
And as usual it is easier not to fight with Coverity.
Limit which files can be added to bundles, which allows resume to work reasonably well. On resume, the bundles are removed and any remaining file is eligible to be to be resumed.
Also reduce the bundle-size default to 20MiB. This is pretty arbitrary, but a smaller default seems better.
Bundle (combine) smaller files during backup to reduce the number of files written to the repository (enable with --bundle). Reducing the number of files is a benefit on all file systems, but especially so on object stores such as S3 that have a high file creation cost. Another benefit is that zero-length files are only stored as metadata in the manifest.
Files are batched up to bundle-size and then compressed/encrypted individually and stored sequentially in the bundle. The bundle id and offset of each file is stored in the manifest so files can be retrieved randomly without needing to read the entire bundle. Files are ordered by timestamp descending when being assigned to bundles to reduce the amount of random access that needs to be done. The idea is that bundles with older files can be read in their entirety on restore and only bundles with newer files will get fragmented.
Bundles are a custom format with metadata stored in the manifest. Tar was considered but it is too limited a format, the major issue being that the size of the file must be known in advance and that is very contrary to how pgBackRest works, especially once we introduce page-level incremental backups.
Bundles are stored numbered in the bundle directory. Some files may still end up in pg_data if they are added after the backup is complete. backup_label is an example.
Currently, only the backup command works in batches. The restore and verify commands use the offsets to pull individual files out of the bundle. It seems better to finalize how this is going to work before optimizing the other commands. Even as is, this is a major step forward, and all commands function with bundling.
One caveat: resume is currently not supported when bundle is enabled.
There is some evidence that retrying fatal errors, especially out of memory errors, may cause lockups. It makes sense to report fatal errors as quickly as possible and bypass retries. This may or not fix the lockup issue but it is worth doing either way.
For now, the only fatal errors will be AssertError and MemoryError.
If the entire batch failed it would be retried, but individual file errors were not retried. This could cause pgBackRest to terminate during expiration or when removing an unresumable backup.
Rather than retry the entire batch, delete the errored files individually to take advantage of the HTTP retry rather than adding a new retry loop. These errors seem rare enough that it should not be a performance issue.
In theory, the additional stat() call after a file has been copied to the repo can determine if additional compression has been applied by the file system. However, it has been a very long time since we tested this in practice. There are currently no unit tests that accurately test this feature since it requires a compressed file system like ZFS to work, which never seemed worth the extra cost.
It can also add a lot of time to backups if there are a large quantity of small files.
In addition, it stands as a blocker for combining files for small file support since it is no longer possible to get per-file sizes from the viewpoint of the file system. There are several ways this could be reworked but none of them are easy while at the same time maintaining current info functionality.
It doesn't seem worth keeping an untested feature that will only work in some special cases (if it still works) when it is blocking development.
The most recent release of Minio has broken CI builds but there is no logging to indicate what is wrong.
For now, just use the prior release to get CI builds working again. This kind if breakage is not uncommon for Minio but they usually resolve it in the next release.
Update lock code to use standard common/io functions and module patterns. This module was developed before the common/io module existed and our patterns had stabilized.
Previously manifest load required two passes through the file list, one to load the data and one to set the defaults. This required each file to be packed twice.
Instead simply note that the file value is default and then set the file defaults when they are loaded from the manifest. This is made possible by the different internal/external representations for files so the same method cannot be applied to paths and links.
This change seems to resolve the performance issues noted in 61ce586 but there is no obvious reason why.
Centralize these options so they are consistent across clusters.
Also, there were some options that the user doesn't really need to see, .e.g. log_line_prefix. These can be set in advance so they don't need to be part of the documentation.
This function (which creates lots of tables) is generally useful for testing (not just stress testing) so create it as soon as the cluster is created.
Also add the data parameter which will insert a single row into the table so the file on disk is not zero bytes.
Manifests with a very large number of files can use a considerable amount of memory. There are a lot of zeroes in the data so it can be stored more efficiently by using base-128 varint encoding for the integers and storing the strings in the same allocation.
The downside is that the data needs to be unpacked in order to be used, but in most cases this seems fast enough (about 10% slower than before) except for saving the manifest, which is 10% slower up to 10 million files and then gets about 5x slower by 100 million (two minutes on my M1 Mac). Profiling does not show this slowdown so I wonder if this is related to the change in memory layout. Curiously, the function that increased most was jsonFromStrInternal(), which was not modified. That gives more weight to the idea that there is some kind of memory issue going on here and one hopes that servers would be less affected. Either way, they largest use cases we have seen are for about 6 million files so if we can improve that case I believe we will be better off.
Further analysis showed that most of the time was taken up writing the size and timestamp fields, which makes almost no sense. The same amount of time was used if they were hard-coded to 0, which points to some odd memory issue on the M1 architecture.
This change has been planned for a while, but the particular impetus at this time is that small file support requires additional fields that would increase manifest memory usage by about 20%, even if the feature is not used.
Note that the Pack code has been updated to use the new varint encoder, but the decoder remains separate because it needs to fetch one byte at a time.
Manifest defaults for user, group, and mode were previously generated by scanning the data to find the most common values. This was very accurate but slow and complicated. It could also lead to surprising changes in the manifest when a default value suddenly changed.
Instead, use the $PGDATA path to generate defaults. In the vast majority of cases the same user/group should own all the path/files and the default file mode is easily derived from the path mode. There may be some edge cases where this generates larger manifests, but in general it reduces time and complexity when saving the manifest.
Remove the MCV code since it is longer longer used.
Change the mode back to 0700 earlier to reduce churn in the expect logs.
This will be especially important in a future commit that gets the defaults exclusively from the base path.
This flag was only being used by the backup command after manifestNewBuild() and had no other uses. There was a time when it was important for integration testing but the unit tests now fulfill this role.
Since backup is the only code concerned with the primary flag, move the code into the backup module.
We don't have any cross-version testing but this change was tested manually with the most recent version of pgBackRest to make sure it was tolerant of the missing primary info. When an older version of pgBackRest loads a newer manifest the primary flag will always be set to false, which is fine since it is not used.
BackupJobData has several members that backupProcessQueue() needs so it is more efficient to use them rather than passing them separately or getting them from the configuration.
Coverity pointed out that -1 could be passed to lseek() (added in a79034ae) after a file failed to open because it is missing. Overall it seems simpler to enclose the success code in an else block to prevent any repeats of this mistake in the future.
This was not an active bug because there are currently no cases where we do read offsets in a file that is allowed to be missing.
Also remove the result flag since it is easier to just check that the file descriptor is valid.
Updating the manifest this way was not a great idea because it broke abstraction for the object. This meant certain changes to the interface and internals were not possible because the code was modifying internal manifest data.
Instead track the user replacements entirely in the restore module.
This also has the benefit of eliminating a pass over the manifest path/file/link lists.
AWS S3 integrates with AWS Key Management Service (AWS KMS) to provide server side encryption of S3 objects. This integration protects objects under encryption keys that never leave AWS KMS unencrypted.
The range feature allows reading out an arbitrary chunk of a file and will be important for efficient small file support.
Now that all drivers are required to support ranges remove the storageFeatureLimitRead feature flag that was implemented only by the Posix driver.
Do the replacement anywhere cfgOptionGroupIdxToKey() is being used to construct a group name in a message. cfgOptionGroupName() is better for this case since it also includes the name of the group so that it does not need to be repeated in each message.
The backup LSNs are useful for performing LSN-based PITR. LSNs will not be displayed in the general text output (without --set) because they are probably not useful enough to deserve their own line.
There is no evidence that users need 8.3/8.4 anymore but it does cost us in terms of development and testing, especially now that we have a number of new backup/restore features planned.
It seems to make sense to remove this support now. If there are users who need to use/migrate from these versions they can use an older version of pgBackRest.
Bug Fixes:
* Fix restore delta link mapping when path/file already exists. (Reviewed by Reid Thompson. Reported by Younes Alhroub.)
* Fix socket leak on connection retries. (Reviewed by Reid Thompson. Reported by James Coleman.)
Features:
* Add TLS server. (Reviewed by Stephen Frost, Reid Thompson, Andrew L'Ecuyer.)
* Add --cmd option. (Contributed by Reid Thompson. Reviewed by Stefan Fercot, David Steele. Suggested by Virgile CREVON.)
Improvements:
* Check archive immediately after backup start. (Reviewed by Reid Thompson, David Christensen.)
* Add timeline and checkpoint checks to backup. (Reviewed by Stefan Fercot, Reid Thompson.)
* Check that clusters are alive and correctly configured during a backup. (Reviewed by Stefan Fercot.)
* Error when restore is unable to find a backup to match the time target. (Reviewed by Reid Thompson, Douglas J Hunley. Suggested by Douglas J Hunley.)
* Parse protocol/port in S3/Azure endpoints. (Contributed by Reid Thompson. Reviewed by David Steele.)
* Add warning when checkpoint_timeout exceeds db-timeout. (Contributed by Stefan Fercot. Reviewed by David Steele.)
* Add verb to HTTP error output. (Contributed by Christoph Berg. Reviewed by David Steele.)
* Allow y/n arguments for boolean command-line options. (Contributed by Reid Thompson. Reviewed by David Steele.)
* Make backup size logging exactly match info command output. (Contributed by Reid Thompson. Reviewed by David Steele. Suggested by Mahomed Hussein.)
Documentation Improvements:
* Display size option default and allowed values with appropriate units. (Reviewed by Reid Thompson.)
* Fix typos and improve documentation for the tablespace-map-all option. (Reviewed by Reid Thompson. Suggested by Reid Thompson.)
* Remove obsolete statement about future multi-repository support. (Suggested by David Christensen.)
Utilize httpUrlNewParseP() to parse endpoint and port from the URL in the S3 and Azure helpers to avoid issues where protocol was not expected to be part of the URL.
This leak was caused by the file descriptor variable getting clobbered after a long jump. Mark it as volatile to fix.
Testing this is a bit complex because the issue only happens in optimized builds, if at all. Put the test into the performance suite, which is always optimized, until a better idea presents itself.
If a path/file was remapped to a link using either --link-map or --link-all there would be no affect if the path/file already existed. If a link existed it would be properly updated and converting a link to a path/file also worked.
The issue happened during delta cleanup, which failed to check if the existing path/file had been remapped to a link.
Add checks for newly mapped path/file links and remove the old path/file we required.
This was previously a warning but the warning is easy to miss so a lot of time may be lost restoring and recovering a backup that will not hit the target.
Since this is technically a breaking change, add an "important note" about the change to the release.
In the backup command, add a warning if start-fast is disabled and the PostgreSQL checkpoint_timeout is greater than db-timeout.
In such cases, we might timeout before the checkpoint occurs and the backup really starts.
Fail the backup if a cluster stops or the standby is promoted. Previously, shutting down the primary would cause an error but it was not detected until the end of the backup. Now the error will happen sooner and a promotion on the standby will also cause an error.
SIGHUP allows the configuration to be reloaded. Note that the configuration will not be updated in child processes that have already started.
SIGTERM terminates the server process gracefully and sends SIGTERM to all child processes. This also gives the tests an easy way to stop the server.
Add the following checks:
* Checkpoint is updated in pg_control after pg_start_backup(). This helps ensure that PostgreSQL and pgBackRest have a consistent view of the storage and that PGDATA paths match.
* Timeline of backup start WAL file matches pg_control. Hard to see how this one could get hit, but we have the power...
* Standby is on the same timeline as the primary. If not, this standby is not following the primary.
* Last standby checkpoint is not greater than the backup checkpoint. If so, this standby is not following the primary.
This also requires some additional plumbing to read/write timeline/checkpoint from pg_control and parse timelines from WAL filenames. There were some changes in the backup tests caused by the fact that pg_control now has different contents for each backup.
The check to ensure that the required checkpoint was reached on the standby should also be updated to use pg_control (it currently uses pg_control_checkpoint()), but that requires non-trivial changes to the test harness and will need to wait.
Eliminate summing and passing of copied files sizes for logging backup size.
Instead, utilize infoBackupDataByLabel() to pull the backup size for the log message.
This allows boolean boolean command-line options to work like their config file equivalents.
At least for now this behavior will remain undocumented since all examples in the documentation will continue to use the standard syntax. The idea is that it will "just work" when options are copied out of config files rather than generating an error.
Previously the archive was only checked at the end of the backup to ensure all WAL required to make the backup consistent was present. The problem was that if archiving was not functioning then the backup had to complete before the user found out, which could be a while if the database was large enough.
Add an archive check immediately after backup start so failures are reported earlier.
The trick is to determine which WAL to check. If the repo is new there may not be any WAL in it and pg_start_backup() will not switch the WAL segment if it is empty. These are both likely scenarios when setting up and/or testing pgBackRest.
If the WAL segment is switched by pg_start_backup(), then check the archive for the segment that was detected prior to backup start. This should be common on normal running clusters with regular activity. Note that this might not be the segment immediately prior to the backup start segment if WAL volume is high.
If pg_start_backup() did not switch the WAL then we can force a switch on PostgreSQL >= 9.3 by creating a restore point. In that case the WAL to check will be the backup start WAL. This is most likely to happen on idle systems, during testing, or immediately after a repo switch.
An advantage of this approach other than earlier notification is that the backup directory will not be created so no resume will be attempted on the next backup.
Note that some additional churn was created in backup.c because the load of archive.info needs to be done earlier.
Properly log the size of files copied during the backup, matching the backup size returned from the info command.
In the reference issue, the incremental backup after switchover logs the size of all files evaluated rather than only the size of the files copied in the backup.
Size option default and allowed values were displayed in bytes, which was confusing for the user.
This also lays the groundwork for adding units to time options.
Move option parsing functions into a common module so they can be used from the build module.
Allows users to provide an executable to be used when pgbackrest generates command strings that expect to invoke pgbackrest. These generated commands are written to files by pgbackrest, e.g. recovery.conf.
The error handler used a loop to process try, catch, and finally blocks. This worked fine but static analysis tools like Coverity did not understand that the finally block would always run and so there were false positives about double-free, unfreed resource, etc.
This implementation removes the loop, which simplifies everything, and makes it clear that the finally block will always run. This cuts down on Coverity false positives.
This implementation also catches lack of coverage on empty catch blocks so a few test fixes were committed separately in d74fe7a.
A small refactor in backup.c is required because gcc 10.3.1 on Fedora 33 complains that the reason variable may be used uninitialized. It's not clear why this is the case, but reducing the scope of the TRY block fixes the issue.
Rather the converting String to StringIds at runtime, store defaults in StringId format in parse.auto.c and convert user input to StringId during parsing.
The compress-type, repo-type and log-level-* options have allow lists, which means it is more efficient to treat them as StringIds.
For compress-type and log-level-* also update the functions that convert them to enums.
The strIdFrom*() forced the caller to pick an encoding, which led to a number of TRY...CATCH blocks in the code. In practice the caller does not care which encoding is used as long as the string is valid for some encoding.
Update the strIdFrom*() function to try all possible encodings and only throw an error when the string is not valid for any of them.
Bug Fixes:
* Allow "global" as a stanza prefix. (Reviewed by Stefan Fercot. Reported by Younes Alhroub.)
* Fix segfault on invalid GCS key file. (Reviewed by Stephen Frost. Reported by Henrik Feldt.)
Improvements:
* Allow link-map option to create new links. (Reviewed by Don Seiler, Stefan Fercot, Chris Bandy. Suggested by Don Seiler.)
* Increase max index allowed for pg/repo options to 256. (Reviewed by Cynthia Shang.)
* Add WebIdentity authentication for AWS S3. (Reviewed by James Callahan, Reid Thompson, Benjamin Blattberg, Andrew L'Ecuyer.)
* Report backup file validation errors in backup.info. (Contributed by Stefan Fercot. Reviewed by David Steele.)
* Add recovery start time to online backup restore log. (Reviewed by Tom Swartz, Stefan Fercot. Suggested by Tom Swartz.)
* Report original error and retries on local job failure. (Reviewed by Stefan Fercot.)
* Rename page checksum error to error list in info text output. (Reviewed by Stefan Fercot.)
* Add hints to standby replay timeout message. (Reviewed by Cynthia Shang, Stefan Fercot. Suggested by Leigh Downs.)
The new rendering behavior is correct in normal cases, but for the pre-rendered HTML blocks in the command and configuration references it causes a lot of churn. This would be OK if the new HTML was diff-able, but it is not.
Go back to the old behavior of using br tags for this case to reduce churn until a more permanent solution is found.
Since CentOS 8 will be EOL at the end of the year it makes sense to do this now. The centos:8 image is still used in documentation.xml because changes there require manual testing, which will need to be done at a later date. The changes are not user-facing, however, and can be done at any time.
Also update CentOS references to RHEL since that is what we are emulating for testing purposes.
This is mostly to revert some comment changes in b11ab9f7 that will break the ppc64le patch, but at the same time keep the spelling consistent in all comments and documentation.
Also revert some space changes for the same reason.
Azurite released another breaking change (see fbd018cd, 096829b3, c38d6926, and Azurite issue 1039) so make adjustments as needed to documentation and tests.
Also remove some dead code that hid the repo-storage-host option and was made obsolete by all these changes.
Checking the return value is not terribly important here, but if setsockopt() fails it is likely that bind() will fail as well. May as well get it over with and this makes Coverity happy.
3879bc69 added this call and the parameters were not quite right but in way that the compiler decided they were OK. It was mostly working but TLS verification was disabled if caPath was NULL, which is not OK.
The variants were needed to easily serialize configurations for the Perl code.
Unions are more efficient and will allow us to add new types that are not supported by variants, e.g. StringId.
The text indicates to populate the pg-primary IP address into the pg_hba.conf file to allow replication connections. It should indicate to populate the pg-standby IP address
It is not uncommon for the S3/Azure emulators we use to introduce breaking changes without warning. If that happens the documentation can still be built by specifying a working version of the image. In general, it is better to let the version float so we know when things break.
Azurite has yet another breaking change coming up (see 096829b3, c38d6926, and Azurite issue 1039) so set azure-image at the current version until the breaking change has been released.
The TLS server is an alternative to using SSH for protocol connections to remote hosts.
This command is currently experimental and intended only for trial and testing. As such, the new commands and options will not show up in the command-line help unless directly requested.
On some platforms the output may contain UTF-8 characters that the latex code is not prepared to handle.
Showing the command is much more important than showing the output, so no big loss.
A stanza name like global_stanza was not allowed because the code was not selective enough about how a global section should be formatted.
Update the config parser to correctly recognize global sections.
Currently link-map only allows links that exist in the backup manifest to be remapped to a new destination.
Allow link-map to create a new link as long as a valid path/file from the backup is referenced.
The local process will retry jobs (e.g. backup file) but after a certain number of failures gives up. Previously, the last error was reported but generally the first error is far more valuable. The last error is likely to be a cascade failure such as the protocol being out of sync.
Report the first error (and stack trace) and append the retry errors to the first error without stack trace information.
Currently errors found during the backup are only available in text output when specifying --set.
Add a flag to backup.info that is available in both the text and json output when --set is not specified. This at least provides the basic info that an error was found in the cluster during the backup, though details are still only available as described above.
Valgrind complained about uninitialized values on arm64 when comparing the reset prefix, probably because "reset" ended up being larger than the option name: Conditional jump or move depends on uninitialised value(s) at cfgParseOption (parse.c:568).
Coverity complained because it could not verify the size of the string to be copied into optionName, probably because it does not understand the purpose of strSize(): You might overrun the 65-character fixed-size string "optionName" by copying the return value of "strZ" without checking the length.
Use strncpy() even though we have already checked the size and make sure the string is terminated. Keep the size check because searching for truncated option names is not a good idea.
This is not a production bug since the code has not been released yet.
"error list" makes it clearer that other errors may be reported. For example, if checksum-page is true in the manifest but no checksum-page-error list is provided then the error is in alignment, i.e. the file size is not a multiple of the page size, with allowances made for a valid-looking partial page at the end of the file.
It is still not possible to differentiate between alignment and page checksum errors in the output but this will be addressed in a future commit.
Azurite introduced a breaking change in 8f63964e to use automatically host-style URIs when the endpoint appears to be a multipart hostname.
This option allows the user to configure which style URI will be used, but changing the endpoint might cause breakage if Azurite decides to use a different style. Future changes to Azurite may also cause breakage.
Command-line help is now generated at build time so it does not need to be committed. This reduces churn on commits that add configuration and/or update the help.
Since churn is no longer an issue, help.auto.c is bzip2 compressed to save space in the binary.
The Perl config parser (Data.pm) has been moved to doc/lib since the Perl build path is no longer required.
Likewise doc/xml/reference.xml has been moved to src/build/help/help.xml since it is required at build time.
Linefeeds were originally used in the place of <p> tags to denote a paragraph. While much of the linefeed usage has been replaced over time, there were many places where it was still being used, especially in reference.xml. This made it difficult to get consistent formatting across different output types. In particular there were formatting issues in the command-line help because it is harder to audit than HTML or PDF.
Replace linefeed formatting with proper <p> tags to make formatting more consistent.
Remove double spaces in all text where <p> tags were added since it does not add churn.
Update all <ul>/<ol>/<li> tags to the more general <list>/<list-item> tags.
Add a few missing periods.
The primary benefit is that objects can allocate memory for their struct with the context, which saves an additional allocation and makes it easier to read context/allocation dumps. Also, the memory context does not need to be stored with the object since it can be determined using the object pointer.
Object pointers cannot be moved, so this means whatever additional memory is allocated cannot be resized. That makes the additional memory ideal for object structs, but not so much for allocating a list that might change size.
Mem contexts can no longer be reused since they will probably be the wrong size so their memory is freed on memContextFree(). This still means fewer allocations and frees overall.
Interfaces still need to be freed by mem context so the old objMove() and objFree() have been preserved as objMoveContext() and objFreeContext(). This will be addressed in a future commit.
The prior limitations were based on using getopt_long() to parse command-line options, which required a static list of allowed options. Setting index max too high bloated the binary unacceptably. 45a4e80 replaced the functionality of getopt_long() but the static list remained.
Improve cfgParseOption() to use available option data and remove the need for a static list. This also allows the option deprecations to be represented more compactly.
Index max is still capped at 256 because a large enough index could cause parseOptionIdxValue() to run out of memory since it allocates a static list based on the highest index found. If that function were improved with a map of found index values then index max could be set to UINT64_MAX.
Note that deprecations no longer set an index max or define whether reset is valid. These were space-saving measures which are no longer required. This means that indexed deprecated options will also be valid up to 256 and always allow reset, but it doesn't seem worth additional code to limit this behavior.
cfgParseOptionId() is no longer needed because calling cfgParseOption() with .ignoreMissingIndex = true duplicates the functionality of cfgParseOptionId(). This leads to some simplification in the help code.
IMPORTANT NOTE: The log level for copied files in the backup/restore commands has been changed to detail. This makes the info log level less noisy but if these messages are required then set the log level for the backup/restore commands to detail.
Bug Fixes:
* Detect errors in S3 multi-part upload finalize. (Reviewed by Cynthia Shang, Marco Montagna. Reported by Marco Montagna, Lev Kokotov, Anderson A. Mallmann.)
* Fix detection of circular symlinks. (Reviewed by Stefan Fercot. Reported by Rohit Raveendran.)
* Only pass selected repo options to the remote. (Reviewed by David Christensen, Cynthia Shang. Reported by Greg Sabino Mullane, David Christensen.)
Improvements:
* Binary protocol. (Reviewed by Cynthia Shang.)
* Automatically create data directory on restore. (Contributed by Stefan Fercot. Reviewed by David Steele. Suggested by Chris Bandy.)
* Allow restore --type=lsn. (Contributed by Stefan Fercot. Reviewed by Cynthia Shang. Suggested by James Coleman.)
* Change level of backup/restore copied file logging to detail. (Reviewed by Stefan Fercot. Suggested by Jens Wilke.)
* Loop while waiting for checkpoint LSN to reach replay LSN. (Contributed by Stefan Fercot. Reviewed by David Steele. Suggested by Fatih Mencutekin.)
* Log backup file total and restore size/file total. (Reviewed by Cynthia Shang.)
Documentation Bug Fixes:
* Fix incorrect host names in user guide. (Reviewed by Stefan Fercot. Reported by Greg Sabino Mullane.)
Documentation Improvements:
* Update contributing documentation and add pull request template. (Contributed by Cynthia Shang. Reviewed by David Steele.)
* Rearrange backup documentation in user guide. (Reviewed by Cynthia Shang.)
* Clarify restore --type behavior in command reference. (Contributed by Cynthia Shang. Reviewed by David Steele.)
* Fix documentation and comment typos. (Contributed by Eric Radman. Reviewed by David Steele.)
Test Suite Improvements:
* Add check for test path inside repo path. (Reviewed by Greg Sabino Mullane. Suggested by Greg Sabino Mullane.)
* Add CodeQL static code analysis. (Reviewed by Cynthia Shang.)
* Update tests to use standard patterns. (Contributed by Cynthia Shang. Reviewed by David Steele.)
This eliminates repetition of the build path so it can be changed more easily.
Also create the build path explicitly rather than suggest that the user do it.
The standby memory was set to 1024mb in 86a651f9 to compensate for a memory leak in restore. The leak has been fixed (or at least mitigated) in e1e6e475 and 4fb6384f so the memory can be reduced to 512mb, the same as the primary.
Either of these temp mem context blocks fixes the issue of command packs not being freed, but it seems like a good idea to have both in case the code changes.
This is intended to provide pre-release stress-testing. Include container memory limits to help check for memory leaks.
Also add parallelism to make for faster builds.
The backup size was a bit off because it did not include any files (e.g. backup_label, WAL files) that were added to the manifest after the main copy. To fix this move the log message to the very end of the backup.
Add size/file total log message to restore since it did not exist before.
Remove the "Automatic Stop Option" section since it only applies to PostgreSQL <= 9.6, which will soon be EOL. Since we no longer build the user guide for PostgreSQL < 10 this section was no longer being tested. The stop-auto option is still documented in the reference.
Move the "Fast Start Option" to "Quick Start - Perform Backup". This is a commonly-used option so it makes sense to mention it earlier. This also makes the backups run more quickly. In the worst case, backups in "Quick Start - Perform Backup" could take minutes to start
Move the "Archive Timeout" section to "Quick Start - Perform Backup" since it is the last section in "Backup".
The user and group were stored in a temp reset mem context so they could get freed if there were enough files to trigger the reset in storageRemoteInfoList().
Allocate user and group in a mem context provided by the caller to prevent them being freed prematurely.
Removed colon from example titles to fix links, fixed test.yml link, and updated the example for the parent/child test process to use the latest macros instead of sleep().
Additional buffers were being allocated for the protocol messages but not being freed.
Most of the allocations were fairly harness, but storageRemoteOpenReadProtocol() and storageWriteRemote() were problematic because they were allocating (but not freeing) buffers equal to the transfer size of the file. Depending on compression, this could be a lot of memory. Though the memory was freed after each file transfer the aggregate of memory used during parallel processing could overwhelm systems with constrained memory.
Also allocate larger initial buffers in storageRemoteOpenReadProtocol() and storageWriteRemote() so a reallocation is not needed.
This makes the generated HTML much more readable in diffs because a single word change will not change a line with potentially many tags.
The output is now slightly larger because of the extra linefeeds.
Options for other repos can cause conflicts and should never be used. Each remote can address exactly one repo or pg cluster.
Also fix an outdated comment.
pg1 was incorrectly used instead of {[host-pg1]} which meant the wrong host name was displayed.
Also, the install block was installing packages to the build host no matter which host was specified.
This file duplicated the command list that already exists in parse.auto.c.
Combine the data from config.auto.c into parse.auto.c and adjust the interface functions as needed. Quite a few were able to be moved to parse.c as static.
If the test path is inside the repo path then it can cause strange issues during testing because the entire repo path is duplicated into the test path so that all tests see a consistent view of the repo.
Another solution might be to pick a better test path name and exclude it from the rsync, but this fix at least addresses the immediate issue.
The storage tests were not modified to the HRN_STORAGE_* nor TEST_STORAGE_* macros as these test are testing the storage drivers.
Note that posixTest.c removed an extraneous #endif // TEST_CONTAINER_REQUIRED and #ifdef TEST_CONTAINER_REQUIRED.
This PR includes all files in the storage/* test directory, namely: azureTest.c, cifsTest.c, gcsTest.c, posixTest.c, remoteTest.c, s3Test.c
--smart is now the default mode. Since --dev is now just an alias for --no-optimize, remove it. --dev-test has been a noop for a while, so this seems like a good time to remove it.
Also make the C auto-generator skip writing files that have not changed to avoid updating the timestamp.
Note that the logging output display of a parent/child test may look jumbled on some systems since the child and parent are attempting to log information at the same time. This is not an issue with the actual test, rather a harness issue that would be beyond the scope of this project to fix.
Parse enough of config.yaml to auto-generate config.auto.h and config.auto.c.
This commit implements most of the infrastructure needed to migrate the rest of the build code to C, but each set of auto-generated files will present its own challenges.
The build is now dependent on libyaml. At this point there is no need for a hard requirement, but that will come soon so it seems better to add the dependency now.
Update Ubuntu 12.04 to 16.04. Version 16.04 is recently EOL but testing on an old version is beneficial.
Update Ubuntu 18.04 to 20.04.
Update Fedora 32 to 33. Version 34 would have been preferred but there were some build issues, i.e. the default shell did not work with configure, and after ksh was installed configure locked up.
Add --no-install-recommends to apt-get commands to save a bit of time and space.
Update test Dockerfile to run in multiple steps. This makes the container larger but also makes rebuilding after changes faster. The --squash option may be used to keep the container small.
Remove obsolete casts in protocol/parallel module. These casts were included in the original migration because Ubuntu 12.04 32-bit gcc required them, but Ubuntu 16.04 32-bit gcc complains. There is no production issue here since at this point in the code the file descriptors are guaranteed to be >= 0.
In the first test (helpRenderSplitSize) added test for empty list and in that and some other tests, the test comment was updated to clarify a bit more what the actual tests is trying to accomplish.
Note that help test parameters can only use the harnessConfig system when testing option values that have been set since options passed to the help command are not "set" options.
Includes backup and backupCommon tests.
Some tests in backupTest were split out where they were originally combined into a single boolean check - which made it difficult to determine which part of the conditional failed.
String values were also removed where they were no longer needed.
It is possible for the checkpoint LSN to lag slightly behind the replay LSN until pg_control has been updated.
Add a loop to keep checking rather than failing when the checkpoint LSN has not been updated.
Simplify HRN_FORK_CHILD_BEGIN() by adding optional parameters with the common defaults.
Add _FD() to macros that retrieve file descriptors to make their purpose clearer.
The log level for copied files in the backup/restore commands has been changed to detail. This makes the info log level less noisy but if these messages are required then set the log level for the backup/restore commands to detail.
In the commandTest the HRN_STORAGE_REMOVE replacement uses .errorOnMissing when the code being tested added the file. The reason for this is 3 fold:
1. to ensure that an inadvertent typo in the path/file name does not go undetected,
2. to ensure that nothing else has removed the file prior to the call, and
3. consistency
Also, added "stanza" to comment when a stanza stop file is removed vs an "all" stop file.
Multi-part upload may fail despite returning an HTTP success code. Check for the ETag field in the result and if not present consider the upload to have failed. This will trigger a retry at the local job level.
Links were followed before they were checked for validity so a circular link would send the manifest build into endless recursion leading to a crash. Fix by moving the recursion after the link check.
Note that this issue has existed since the C migration and was not introduced by the refactor in eba013b.
Data directory creation was added during the C migration, but creation of the base data directory (PGDATA) was prevented by a check migrated from Perl.
Remove the check and update tests to create the data directory at least once.
Includes archiveCommon, archiveGet and archivePush.
Also fixed a test that was looking in repo instead of repo3 in the original archivePush to use the repo3 path as stated by the comment (line 879 in original tests and line 855 in new tests).
It seems better to use TEST_PATH in combination with a constant string rather than have a number of different path constants. This improves readability and reduces confusion about which constant should be used.
For tests already updated as part of the macro-replacement effort, the output tests (TEST_ERROR, TEST_RESULT_LOG, TEST_STORAGE_LIST and TEST_RESULT_STR) have been simplified for readability to remove all but the TEST_PATH constants. The ongoing macro-replacement effort will include these changes.
Updated: expireTest, stanzaTest, checkTest, infoTest, verifyTest (infoArchive and infoBackup had no changes).
Switch from JSON-based to binary protocol for communicating with local and remote process. The pack type is used to implement the binary protocol.
There are a number advantages:
* The pack type is more compact than JSON and are more efficient to render/parse.
* Packs are more strictly typed than JSON.
* Each protocol message is written entirely within ProtocolServer/ProtocolClient so is less likely to get interrupted by an error and leave the protocol in a bad state.
* There is no limit on message size. Previously this was limited by buffer size without a custom implementation, as was done for read/writing files.
Some cruft from the Perl days was removed, specifically allowing NULL messages and stack traces. This is no longer possible in C.
There is room for improvement here, in particular locking down the allowed sequence of protocol messages and building a state machine to enforce it. This will be useful for resetting the protocol when it gets in a bad state.
Some tests had to be reordered or updated, as follows:
* Reordered tests at line 317 and 331 to avoid unnecessary file removal.
* Change "stanza found" test at line 1735 to reflect real-life scenario. Originally this test had the cipher-pass environment key set up which caused the RepoGrp to be 2 but with no valid repo path. This resulted in the repo loops executing for the repo2 but since the path was not defined, the tests just reported "none" for cipher which is incorrect since the repo IS encrypted.
* Moved order of HRN_CFG_LOAD in some tests when able to avoid using storageTest.
