我使用命令每天备份一个PostgreSQL数据库
/usr/bin/pg_basebackup -D $outdir -Ft -x -z -w -R -v
现在我想在另一台服务器上恢复这个数据库。我用描述
https://www.postgresql.org/docs/9.5/static/continuous-archiving.html#BACKUP-PITR-RECOVERY
.
这个
recovery.conf
备份中包含的文件包含以下内容:
standby_mode = 'on'
primary_conninfo = 'user=postgres port=5432 sslmode=prefer sslcompression=1 krbsrvname=postgres'
文档中的下一步(8)是启动PostgreSQL。这会导致由于超时而失败:
3783 postgres: startup process waiting for 0000000100000024000000B
在原始服务器上,我没有此文件。是否可以在不使用任何wal文件的情况下只恢复pg_basebackup的状态?那么recovery.conf文件中应该包含什么?
按照@josmac的建议,我移动了recovery.conf,结果如下:
shaun2:/var/lib/pgsql/data # service postgresql start
Job for postgresql.service failed because the control process exited with error code. See "systemctl status postgresql.service" and "journalctl -xe" for details.
shaun2:/var/lib/pgsql/data # service postgresql status
â postgresql.service - PostgreSQL database server
Loaded: loaded (/usr/lib/systemd/system/postgresql.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Mon 2018-06-18 12:02:53 CEST; 12s ago
Process: 1340 ExecStop=/usr/lib/postgresql-init stop (code=exited, status=0/SUCCESS)
Process: 9355 ExecStart=/usr/lib/postgresql-init start (code=exited, status=1/FAILURE)
Main PID: 1060 (code=exited, status=0/SUCCESS)
Jun 18 12:02:52 shaun2 postgres[9369]: [3-1] 2018-06-18 12:02:52 CEST LOG: invalid checkpoint record
Jun 18 12:02:52 shaun2 postgres[9369]: [4-1] 2018-06-18 12:02:52 CEST FATAL: could not locate required checkpoint record
Jun 18 12:02:52 shaun2 postgres[9369]: [4-2] 2018-06-18 12:02:52 CEST HINT: If you are not restoring from a backup, try removing the file "/var/lib/pgsql/data/backup_label".
Jun 18 12:02:52 shaun2 postgres[9367]: [2-1] 2018-06-18 12:02:52 CEST LOG: startup process (PID 9369) exited with exit code 1
Jun 18 12:02:52 shaun2 postgres[9367]: [3-1] 2018-06-18 12:02:52 CEST LOG: aborting startup due to startup process failure
Jun 18 12:02:53 shaun2 postgresql-init[9355]: pg_ctl: could not start server
Jun 18 12:02:53 shaun2 systemd[1]: postgresql.service: Control process exited, code=exited status=1
Jun 18 12:02:53 shaun2 systemd[1]: Failed to start PostgreSQL database server.
Jun 18 12:02:53 shaun2 systemd[1]: postgresql.service: Unit entered failed state.
Jun 18 12:02:53 shaun2 systemd[1]: postgresql.service: Failed with result 'exit-code'.
我想PostgreSQL仍然在寻找丢失的wal文件,因为
backup_label
以下内容:
shaun2:/var/lib/pgsql/data # cat backup_label
START WAL LOCATION: 24/B0000028 (file 0000000100000024000000B0)
CHECKPOINT LOCATION: 24/B0000028
BACKUP METHOD: streamed
BACKUP FROM: master
START TIME: 2018-06-14 02:55:08 CEST
LABEL: pg_basebackup base backup
移开备份标签后的结果:
shaun2:/var/lib/pgsql/data # service postgresql status
â postgresql.service - PostgreSQL database server
Loaded: loaded (/usr/lib/systemd/system/postgresql.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Mon 2018-06-18 12:17:54 CEST; 4s ago
Process: 1340 ExecStop=/usr/lib/postgresql-init stop (code=exited, status=0/SUCCESS)
Process: 10401 ExecStart=/usr/lib/postgresql-init start (code=exited, status=1/FAILURE)
Main PID: 1060 (code=exited, status=0/SUCCESS)
Jun 18 12:17:53 shaun2 postgres[10414]: [4-1] 2018-06-18 12:17:53 CEST LOG: invalid secondary checkpoint record
Jun 18 12:17:53 shaun2 postgres[10414]: [5-1] 2018-06-18 12:17:53 CEST PANIC: could not locate a valid checkpoint record
Jun 18 12:17:54 shaun2 postgres[10412]: [2-1] 2018-06-18 12:17:54 CEST LOG: startup process (PID 10414) was terminated by signal 6: Aborted
