Bypass database checks when stanza-delete issued with force.

Previously it was not possible to delete a stanza if the PostgreSQL server could not be contacted.

Contributed by Cynthia Shang.
Suggested by Roman.

doc/xml/release.xml

@@ -25,6 +25,15 @@
                 </release-bug-list>
 
                 <release-improvement-list>
+                    <release-item>
+                        <release-item-contributor-list>
+                            <release-item-ideator id="hatifnatt"/>
+                            <release-item-contributor id="cynthia.shang"/>
+                        </release-item-contributor-list>
+
+                        <p>Bypass database checks when <cmd>stanza-delete</cmd> issued with <br-option>force</br-option>.</p>
+                    </release-item>
+
                     <release-item>
                         <p>Improve performance of non-blocking reads by using maximum buffer size.</p>
                     </release-item>
@@ -7022,6 +7031,11 @@
             <contributor-id type="github">guruguruguru</contributor-id>
         </contributor>
 
+        <contributor id="hatifnatt">
+            <contributor-name-display>Roman</contributor-name-display>
+            <contributor-id type="github">hatifnatt</contributor-id>
+        </contributor>
+
         <contributor id="hans.jurgen.schonig">
             <contributor-name-display>Hans-J&amp;uuml;rgen Sch&amp;ouml;nig</contributor-name-display>
         </contributor>

lib/pgBackRest/Stanza.pm

@@ -307,6 +307,9 @@ sub stanzaDelete
                 "\nHINT: has the pgbackrest stop command been run on this server?", ERROR_FILE_MISSING);
         }
 
+        # If a force has not been issued, then check the database
+        if (!cfgOption(CFGOPT_FORCE))
+        {
             # Get the master database object and index
             my ($oDbMaster, $iMasterRemoteIdx) = dbObjectGet({bMasterOnly => true});
 
@@ -314,12 +317,13 @@ sub stanzaDelete
             my $oStorageDbMaster = storageDb({iRemoteIdx => $iMasterRemoteIdx});
 
             # Check if Postgres is running and if so only continue when forced
-        if ($oStorageDbMaster->exists(DB_FILE_POSTMASTERPID) && !cfgOption(CFGOPT_FORCE))
+            if ($oStorageDbMaster->exists(DB_FILE_POSTMASTERPID))
             {
                 confess &log(ERROR, DB_FILE_POSTMASTERPID . " exists - looks like the postmaster is running. " .
                     "To delete stanza '${strStanza}', shutdown the postmaster for stanza '${strStanza}' and try again, " .
                     "or use --force.", ERROR_POSTMASTER_RUNNING);
             }
+        }
 
         # Delete the archive info files
         $oStorageRepo->remove(STORAGE_REPO_ARCHIVE . '/' . ARCHIVE_INFO_FILE, {bIgnoreMissing => true});

src/perl/embed.auto.c

@@ -15514,16 +15514,20 @@ static const EmbeddedModule embeddedModule[] =
             "\"\\nHINT: has the pgbackrest stop command been run on this server?\", ERROR_FILE_MISSING);\n"
             "}\n"
             "\n\n"
+            "if (!cfgOption(CFGOPT_FORCE))\n"
+            "{\n"
+            "\n"
             "my ($oDbMaster, $iMasterRemoteIdx) = dbObjectGet({bMasterOnly => true});\n"
             "\n\n"
             "my $oStorageDbMaster = storageDb({iRemoteIdx => $iMasterRemoteIdx});\n"
             "\n\n"
-            "if ($oStorageDbMaster->exists(DB_FILE_POSTMASTERPID) && !cfgOption(CFGOPT_FORCE))\n"
+            "if ($oStorageDbMaster->exists(DB_FILE_POSTMASTERPID))\n"
             "{\n"
             "confess &log(ERROR, DB_FILE_POSTMASTERPID . \" exists - looks like the postmaster is running. \" .\n"
             "\"To delete stanza '${strStanza}', shutdown the postmaster for stanza '${strStanza}' and try again, \" .\n"
             "\"or use --force.\", ERROR_POSTMASTER_RUNNING);\n"
             "}\n"
+            "}\n"
             "\n\n"
             "$oStorageRepo->remove(STORAGE_REPO_ARCHIVE . '/' . ARCHIVE_INFO_FILE, {bIgnoreMissing => true});\n"
             "$oStorageRepo->remove(STORAGE_REPO_ARCHIVE . '/' . ARCHIVE_INFO_FILE . INI_COPY_EXT, {bIgnoreMissing => true});\n"

test/expect/real-all-004.log

@@ -312,3 +312,23 @@ repo1-path=[TEST_PATH]/backup/repo
 [global:backup]
 archive-copy=y
 start-fast=y
+
+stop all stanzas (db-master host)
+> [CONTAINER-EXEC] db-master [BACKREST-BIN] --config=[TEST_PATH]/db-master/pgbackrest.conf stop
+------------------------------------------------------------------------------------------------------------------------------------
+
+stop db stanza (backup host)
+> [CONTAINER-EXEC] backup [BACKREST-BIN] --config=[TEST_PATH]/backup/pgbackrest.conf --stanza=db stop
+------------------------------------------------------------------------------------------------------------------------------------
+
+stanza-delete db - delete stanza with --force when pgbackrest on pg host not accessible (backup host)
+> [CONTAINER-EXEC] backup [BACKREST-BIN] --config=[TEST_PATH]/backup/pgbackrest.conf --stanza=db --log-level-console=detail  --force stanza-delete
+------------------------------------------------------------------------------------------------------------------------------------
+
+start all stanzas (db-master host)
+> [CONTAINER-EXEC] db-master [BACKREST-BIN] --config=[TEST_PATH]/db-master/pgbackrest.conf start
+------------------------------------------------------------------------------------------------------------------------------------
+
+start all stanzas (backup host)
+> [CONTAINER-EXEC] backup [BACKREST-BIN] --config=[TEST_PATH]/backup/pgbackrest.conf start
+------------------------------------------------------------------------------------------------------------------------------------

test/lib/pgBackRestTest/Module/Real/RealAllTest.pm

@@ -988,6 +988,22 @@ sub run
                 'succeed on --no-' . cfgOptionName(CFGOPT_ONLINE) . ' with --' . cfgOptionName(CFGOPT_FORCE),
                 {strOptionalParam => '--no-' . cfgOptionName(CFGOPT_ONLINE) . ' --' . cfgOptionName(CFGOPT_FORCE)});
         }
+
+        # Stanza-delete --force without access to pgbackrest on database host
+        #---------------------------------------------------------------------------------------------------------------------------
+        if ($bTestExtra && !$bS3 && $bHostBackup)
+        {
+            # With stanza-delete --force, allow stanza to be deleted regardless of accessiblility of database host
+            if ($bHostBackup)
+            {
+                $oHostDbMaster->stop();
+                $oHostBackup->stop({strStanza => $self->stanza});
+                $oHostBackup->stanzaDelete("delete stanza with --force when pgbackrest on pg host not accessible",
+                    {strOptionalParam => ' --' . cfgOptionName(CFGOPT_FORCE)});
+                $oHostDbMaster->start();
+                $oHostBackup->start();
+            }
+        }
     }
     }
     }