【PostgreSQL】數據庫復制

異步流復制
[root@wallet01?~]#?su?-?postgres
[postgres@wallet01?~]$?vi?/var/lib/pgsql/9.6/data/pg_hba.conf
host????replication?????postgres????????192.168.1.0/24??????????md5

[postgres@wallet01?~]$?vi?/var/lib/pgsql/9.6/data/postgresql.conf
listen_addresses?=?'0.0.0.0'
max_wal_senders?=?5
wal_level?=?hot_standby?

[postgres@wallet01?~]$?pg_ctl?restart
waiting?for?server?to?shut?down....?done
server?stopped
server?starting

[root@wallet02?~]#?su?-?postgres
[postgres@wallet02?~]$?pg_basebackup?-h?192.168.1.201?-U?postgres?-F?p?-P?-x?-R?-D?/var/lib/pgsql/9.6/data?
Password:?
2161085/2161085?kB?(100%),?1/1?tablespace

[postgres@wallet02?~]$?vi?/var/lib/pgsql/9.6/data/postgresql.conf
hot_standby?=?on

[postgres@wallet02?~]$?vi?/var/lib/pgsql/9.6/data/recovery.conf
standby_mode?=?'on'
primary_conninfo?=?'user=postgres?password=postgres?host=192.168.1.201?port=5432?sslmode=disable?
sslcompression=1?krbsrvname=postgres'

[postgres@wallet02?~]$?pg_ctl?start
server?starting

[postgres@wallet01?~]$?psql
psql?(9.6.12)
Type?"help"?for?help.

postgres=#?select?pid,state,client_addr,sync_priority,sync_state?from?pg_stat_replication;
?pid??|???state???|??client_addr??|?sync_priority?|?sync_state?
------+-----------+---------------+---------------+------------
?2055?|?streaming?|?192.168.1.202?|?????????????0?|?async
(1?row)

同步流復制
[root@wallet01?~]#?su?-?postgres
[postgres@wallet01?~]$?vi?/var/lib/pgsql/9.6/data/pg_hba.conf
host????replication?????postgres????????192.168.1.0/24??????????md5

[postgres@wallet01?~]$?vi?/var/lib/pgsql/9.6/data/postgresql.conf
max_wal_senders?=?5?
wal_level?=?hot_standby
synchronous_standby_names?=?'wallet02,wallet03'

[root@wallet01?~]#?su?-?postgres
[postgres@wallet01?~]$?pg_ctl?reload
server?signaled

[root@wallet02?~]#?su?-?postgres
[postgres@wallet02?~]$?pg_basebackup?-h?192.168.1.201?-U?postgres?-F?p?-P?-x?-R?-D?/var/lib/pgsql/9.6/data?
Password:?
2161085/2161085?kB?(100%),?1/1?tablespace

[postgres@wallet02?~]$?vi?/var/lib/pgsql/9.6/data/postgresql.conf
hot_standby?=?on

[postgres@wallet02?~]$?vi?/var/lib/pgsql/9.6/data/recovery.conf
standby_mode?=?'on'
primary_conninfo?=?'application_name=wallet02?user=postgres?password=postgres?host=192.168.1.201?port=5432?sslmode=disable?sslcompression=1'

[postgres@wallet02?~]$??pg_ctl?start
server?starting

[root@wallet03?~]#?su?-?postgres
[postgres@wallet03?~]$?pg_basebackup?-h?192.168.1.201?-U?postgres?-F?p?-P?-x?-R?-D?/var/lib/pgsql/9.6/data?
Password:?
2161215/2161215?kB?(100%),?1/1?tablespace

[postgres@wallet03?~]$?vi?/var/lib/pgsql/9.6/data/postgresql.conf
hot_standby?=?on

[postgres@wallet03?~]$?vi?/var/lib/pgsql/9.6/data/recovery.conf
standby_mode?=?'on'
primary_conninfo?=?'application_name=wallet03?user=postgres?password=postgres?host=192.168.1.201?port=5432?sslmode=disable?sslcompression=1'

[postgres@wallet03?~]$??pg_ctl?start
server?starting

[postgres@wallet01?~]$?psql
psql?(9.6.12)
Type?"help"?for?help.
postgres=#?select?pid,state,client_addr,sync_priority,sync_state?from?pg_stat_replication;
?pid??|???state???|??client_addr??|?sync_priority?|?sync_state?
------+-----------+---------------+---------------+------------
?1968?|?streaming?|?192.168.1.202?|?????????????1?|?sync
?2018?|?streaming?|?192.168.1.203?|?????????????2?|?potential