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4e94454544
2. Implement pg_probackup specific commands for archiving: archive-push for archive_command and archive-get for restore_command
88 lines
3.1 KiB
C
88 lines
3.1 KiB
C
/*-------------------------------------------------------------------------
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*
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* archive.c: - pg_probackup specific archive commands for archive backups.
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*
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*
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* Portions Copyright (c) 2017, Postgres Professional
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*
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*-------------------------------------------------------------------------
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*/
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#include "pg_probackup.h"
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#include <unistd.h>
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#include <sys/stat.h>
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/*
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* pg_probackup specific archive command for archive backups
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* set archive_command = 'pg_probackup archive-push -B /home/anastasia/backup
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* --wal-file-path %p --wal-file-name %f', to move backups into arclog_path.
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* Where archlog_path is $BACKUP_PATH/wal/system_id.
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* Currently it just copies wal files to the new location.
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* TODO Planned options: compress, list the arclog content,
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* compute and validate checksums.
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*/
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int
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do_archive_push(char *wal_file_path, char *wal_file_name)
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{
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char backup_wal_file_path[MAXPGPATH];
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char absolute_wal_file_path[MAXPGPATH];
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char current_dir[MAXPGPATH];
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int64 system_id;
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pgBackupConfig *config;
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if (!getcwd(current_dir, sizeof(current_dir)))
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elog(ERROR, "getcwd() error");
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/* verify that archive-push --instance parameter is valid */
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config = readBackupCatalogConfigFile();
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system_id = get_system_identifier(current_dir);
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if (config->pgdata == NULL)
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elog(ERROR, "cannot read pg_probackup.conf for this instance");
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if(system_id != config->system_identifier)
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elog(ERROR, "Refuse to push WAL segment %s into archive. Instance parameters mismatch."
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"Instance '%s' should have SYSTEM_ID = %ld instead of %ld",
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wal_file_name, instance_name, config->system_identifier, system_id);
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if (strcmp(current_dir, config->pgdata) != 0)
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elog(ERROR, "Refuse to push WAL segment %s into archive. Instance parameters mismatch."
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"Instance '%s' should have PGDATA = %s instead of %s",
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wal_file_name, instance_name, config->pgdata, current_dir);
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/* Create 'archlog_path' directory. Do nothing if it already exists. */
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dir_create_dir(arclog_path, DIR_PERMISSION);
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join_path_components(absolute_wal_file_path, current_dir, wal_file_path);
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join_path_components(backup_wal_file_path, arclog_path, wal_file_name);
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elog(INFO, "pg_probackup archive-push from %s to %s", absolute_wal_file_path, backup_wal_file_path);
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copy_wal_file(absolute_wal_file_path, backup_wal_file_path);
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elog(INFO, "pg_probackup archive-push completed successfully");
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return 0;
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}
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/*
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* pg_probackup specific restore command.
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* Move files from arclog_path to pgdata/wal_file_path.
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*/
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int
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do_archive_get(char *wal_file_path, char *wal_file_name)
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{
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char backup_wal_file_path[MAXPGPATH];
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char absolute_wal_file_path[MAXPGPATH];
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char current_dir[MAXPGPATH];
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if (!getcwd(current_dir, sizeof(current_dir)))
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elog(ERROR, "getcwd() error");
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join_path_components(absolute_wal_file_path, current_dir, wal_file_path);
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join_path_components(backup_wal_file_path, arclog_path, wal_file_name);
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elog(INFO, "pg_probackup archive-get from %s to %s", backup_wal_file_path, absolute_wal_file_path);
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copy_wal_file(backup_wal_file_path, absolute_wal_file_path);
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elog(INFO, "pg_probackup archive-get completed successfully");
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return 0;
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} |