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我有 3 个节点 Postgres 集群,由赞助人管理,每当我的主节点出现故障并作为副本重新加入时,旧主节点就会面临以下错误:

2021-06-25T00:16:29.856133+00:00 host0 postgres_0[14131]: [7-2] #011DETAIL:  This server's history forked from timeline 1 at 0/5208600.
2021-06-25T00:16:29.862228+00:00 host0 postgres_0[112]: [4855-1] pid=112,session=60d4c1b1.70,line=4850,sqlstate=00000,user_app=,user=,db=,client=,txId=0 LOG:  new timeline 2 forked off current database system timeline 1 before current recovery point 0/60000A0
2021-06-25T00:16:34.857325+00:00 host0 postgres_0[14141]: [7-1] pid=14141,session=60d52062.373d,line=1,sqlstate=XX000,user_app=,user=,db=,client=,txId=0 FATAL:  could not start WAL streaming: ERROR:  requested starting point 0/6000000 on timeline 1 is not in this server's history

这是我使用的配置:

"hot_standby":                                "on",
"wal_log_hints":                              "on",
"restore_command":                            "cp /bp2/wal/psql/wal_archive/%f %p",
"archive_mode":                               "on",
"archive_command":                            "mkdir -p /bp2/wal/psql/wal_archive && test ! -f /bp2/wal/psql/wal_archive/%f && cp %p /bp2/wal/psql/wal_archive/%f",
"remove_data_directory_on_diverged_timelines":"true",
"remove_data_directory_on_rewind_failure":    "true",
"use_pg_rewind":                              "true",
"recovery_target_timeline":                   "latest"

已经尝试将所有节点的 WAL 日志存储到共享目录,然后从那里恢复。

但错误仍然相同。

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1 回答 1

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我认为您需要做的是,pg_rewind在您的新副本中手动使用命令。发生的情况是,当时间线从 1 更改为 2 时,旧 master 与新 master 处于不同的 wal 位置。

pg_rewind --source-server "user=<user> password=<user_password> host=<dns_or_ip_address> port=<server_port>" --target-pgdata <data-directory>

参考

于 2021-06-28T07:16:18.103 回答