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PostgreSQL主備集群模式下版本升級

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PostgreSQL主備集群模式下版本升級
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master節(jié)點數(shù)據(jù)庫版本升級

1. master節(jié)點安裝新版本數(shù)據(jù)庫并初始化數(shù)據(jù)目錄
initdb -A trust -D /data/pg140 -E utf8 -k -U postgres -W --wal-segsize=1024
2. 檢查當前數(shù)據(jù)同步狀態(tài)
user:postgres@db:postgres[[local]:5432]#select * from pg_stat_replication ;
+-[ RECORD 1 ]-----+-------------------------------+
| pid | 15236                         |
|
 usesysid | 16384 |
| usename | replic |
|
 application_name | walreceiver |
| client_addr | 192.168.229.121               |
|
 client_hostname | NULL |
| client_port | 46028                         |
|
 backend_start | 2021-08-11 10:30:16.978079+08 |
| backend_xmin | 499                           |
|
 state | streaming |
| sent_lsn | 3/800000D8 |
|
 write_lsn | 3/800000D8 |
| flush_lsn | 3/800000D8 |
|
 replay_lsn | 3/800000D8 |
| write_lag | NULL |
|
 flush_lag | NULL |
| replay_lag | NULL |
|
 sync_priority | 0 |
| sync_state | async |
|
 reply_time | 2021-08-11 10:31:47.648992+08 |
+------------------+-------------------------------+
3. 停止主備數(shù)據(jù)庫
pg_ctl stop -D $PGDATA
4. master節(jié)點進行數(shù)據(jù)庫升級
1)注意:要求新舊版本數(shù)據(jù)塊大小、wal-blocksize大小必須一致。
2)調(diào)整pg_hba.conf 認證模式為trust。
3)使用pg_upgrade進行升級檢查。
[postgres@PG-1 pg133]$ /opt/pgsql/pg140/bin/pg_upgrade -b /opt/pgsql/pg133/bin/ -B /opt/pgsql/pg140/bin/ -d /data/pg133 -D /data/pg140 -j 8 -p 5432 -P 5433 -c
Performing Consistency Checks
-----------------------------
Checking cluster versions ok
Checking database user is the install user                  ok
Checking database connection settings                       ok
Checking for prepared transactions ok
Checking for system-defined composite types in user tables  ok
Checking for reg* data types in user tables                 ok
Checking for contrib/isn with bigint-passing mismatch ok
Checking for user-defined encoding conversions ok
Checking for user-defined postfix operators ok
Checking for presence of required libraries ok
Checking database user is the install user                  ok
Checking for prepared transactions ok
Checking for new cluster tablespace directories ok
*Clusters are compatible*
注意:要所有的檢查選項都通過。
4)執(zhí)行升級
[postgres@PG-1 pg133]$ /opt/pgsql/pg140/bin/pg_upgrade -b /opt/pgsql/pg133/bin/ -B /opt/pgsql/pg140/bin/ -d /data/pg133 -D /data/pg140 -j 8 -p 5432 -P 5433
Performing Consistency Checks
-----------------------------
Checking cluster versions ok
Checking database user is the install user                  ok
Checking database connection settings                       ok
Checking for prepared transactions ok
Checking for system-defined composite types in user tables  ok
Checking for reg* data types in user tables                 ok
Checking for contrib/isn with bigint-passing mismatch ok
Checking for user-defined encoding conversions ok
Checking for user-defined postfix operators ok
Creating dump of global objects ok
Creating dump of database schemas
ok
Checking for presence of required libraries ok
Checking database user is the install user                  ok
Checking for prepared transactions ok
Checking for new cluster tablespace directories ok
If pg_upgrade fails after this point, you must re-initdb the
new cluster before continuing.
Performing Upgrade
------------------
Analyzing all rows in the new cluster ok
Freezing all rows in the new cluster ok
Deleting files from new pg_xact ok
Copying old pg_xact to new server                           ok
Setting next transaction ID and epoch for new cluster
ok
Deleting files from new pg_multixact/offsets ok
Copying old pg_multixact/offsets to new server              ok
Deleting files from new pg_multixact/members ok
Copying old pg_multixact/members to new server              ok
Setting next multixact ID and offset for new cluster ok
Resetting WAL archives ok
Setting frozenxid and minmxid counters in new cluster ok
Restoring global objects in the new cluster ok
Restoring database schemas in the new cluster
ok
Copying user relation files
ok
Setting next OID for new cluster ok
Sync data directory to disk ok
Creating script to delete old cluster ok
Upgrade Complete
----------------
Optimizer statistics are not transferred by pg_upgrade.
Once you start the new server, consider running:
/opt/pgsql/pg140/bin/vacuumdb --all --analyze-in-stages
Running this script will delete the old clusters data files:
./delete_old_cluster.sh
注意:所有狀態(tài)都OK,表示升級完成
5)調(diào)整配置參數(shù)、啟動新版本數(shù)據(jù)庫及統(tǒng)計信息收集

/opt/pgsql/pg140/bin/pg_ctl start -D /data/pg140
/opt/pgsql/pg140/bin/vacuumdb --all --analyze-in-stages

standby節(jié)點數(shù)據(jù)庫版本升級

1. standby節(jié)點安裝新版本數(shù)據(jù)庫。
2. 使用rsync將主節(jié)點數(shù)據(jù)同步到standby節(jié)點。
rsync -avz postgres@192.168.229.129:/data/pg140 /data
3. 調(diào)整數(shù)據(jù)庫配置參數(shù)。
4. 創(chuàng)建standby.signal,權(quán)限0600或者cp /data/oldatadir/standby.signal /data/pg140。
5. 將連接信息添加到postgresql.auto.conf中或者cp /data/olddatadir/postgresql.auto.conf /data/pg140。

6. 啟動standby數(shù)據(jù)庫。

檢查主備復制情況

user:postgres@db:postgres[[local]:5432]#select * from pg_stat_replication;
+-[ RECORD 1 ]-----+-------------------------------+
| pid | 15980                         |
|
 usesysid | 16384 |
| usename | replic |
|
 application_name | walreceiver |
| client_addr | 192.168.229.121               |
|
 client_hostname | NULL |
| client_port | 46122                         |
|
 backend_start | 2021-08-11 11:23:38.478461+08 |
| backend_xmin | NULL |
|
 state | streaming |
| sent_lsn | 5/2ABF20                      |
|
 write_lsn | 5/2ABF20 |
| flush_lsn | 5/2ABF20                      |
|
 replay_lsn | 5/2ABF20 |
| write_lag | 00:00:00.000595 |
|
 flush_lag | 00:00:00.000982 |
| replay_lag | 00:00:00.001227               |
|
 sync_priority | 0 |
| sync_state | async |
|
 reply_time | 2021-08-11 11:23:51.450434+08 |
+------------------+-------------------------------+


本文作者:魏 強(上海新炬王翦團隊)

本文來源:“IT那活兒”公眾號

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