PostgrelSql 9.4 hot standby配置
阿新 • • 發佈：2019-01-28
----配置同步流複製 **************************************************** 1.在主庫增加同步的使用者名稱與密碼 **************************************************** $ psql -h 192.168.50.110 -d postgres -U postgres Password for user postgres: psql (9.4.4) Type "help" for help. postgres=# \l List of databases Name | Owner | Encoding | Collate | Ctype | Access privileges -----------+----------+----------+------------+------------+----------------------- postgres | postgres | UTF8 | en_US.utf8 | en_US.utf8 | template0 | postgres | UTF8 | en_US.utf8 | en_US.utf8 | =c/postgres + | | | | | postgres=CTc/postgres template1 | postgres | UTF8 | en_US.utf8 | en_US.utf8 | =c/postgres + | | | | | postgres=CTc/postgres (3 rows) postgres=# \c postgres You are now connected to database "postgres" as user "postgres". postgres=# SELECT rolname from pg_roles ; rolname ---------- postgres repluser (2 rows) postgres=# SELECT usename from pg_user; usename ---------- postgres repluser (2 rows) postgres=# CREATE ROLE repluser REPLICATION LOGIN PASSWORD '123'; CREATE ROLE postgres=# **************************************************** 2.新建測試資料庫 **************************************************** postgres=# \l List of databases Name | Owner | Encoding | Collate | Ctype | Access privileges -----------+----------+----------+------------+------------+----------------------- postgres | postgres | UTF8 | en_US.utf8 | en_US.utf8 | template0 | postgres | UTF8 | en_US.utf8 | en_US.utf8 | =c/postgres + | | | | | postgres=CTc/postgres template1 | postgres | UTF8 | en_US.utf8 | en_US.utf8 | =c/postgres + | | | | | postgres=CTc/postgres (3 rows) postgres=# create database wind; CREATE DATABASE postgres=# \l List of databases Name | Owner | Encoding | Collate | Ctype | Access privileges -----------+----------+----------+------------+------------+----------------------- postgres | postgres | UTF8 | en_US.utf8 | en_US.utf8 | template0 | postgres | UTF8 | en_US.utf8 | en_US.utf8 | =c/postgres + | | | | | postgres=CTc/postgres template1 | postgres | UTF8 | en_US.utf8 | en_US.utf8 | =c/postgres + | | | | | postgres=CTc/postgres wind | postgres | UTF8 | en_US.utf8 | en_US.utf8 | (4 rows) postgres=# \c wind; You are now connected to database "wind" as user "postgres". wind=# \d No relations found. wind=# create table t1(sid int not null primary key,sname varchar(10)); CREATE TABLE wind=# insert into t1 values(101,'ocpyang'); INSERT 0 1 wind=# insert into t1 values(102,'yzw'); INSERT 0 1 wind=# select * from t1; sid | sname -----+--------- 101 | ocpyang 102 | yzw (2 rows) **************************************************** 3.在主庫pg01上進行配置 **************************************************** --3.1 $ vi /data/pg/data/pg_hba.conf 增加以下： host replication repluser 192.168.50.0/24 md5 --3.2 在主庫pg01的/data/pg/data/postgresql.conf中設定如下三個引數 $ vi /data/pg/data/postgresql.conf 59 listen_addresses = '*' 175 wal_level = hot_standby 224 max_wal_senders = 5 226 wal_keep_segments = 64 --3.3 在主資料上指定同步複製的Standby名稱，在主庫pg01的/data/pg/data/postgresql.conf中設定: vi /data/pg/data/postgresql.conf 236 synchronous_standby_names = 'pg02' --3.4 修改上述引數後需要重啟資料庫. pg_ctl -m "immediate" restart **************************************************** 4.在備庫pg02上進行配置 **************************************************** $pg_ctl -m "immediate" stop -----4.1 備份資料 $rm -rf /data/pg/data/* $pg_basebackup -h 192.168.50.110 -U repluser -F p -P -x -R -D /data/pg/data/ -l backup20150921 Password: 54491/54491 kB (100%), 1/1 tablespace --4.2 修改備庫的pg02的recovery.conf $ cat /data/pg/data/recovery.conf standby_mode = 'on' primary_conninfo = 'user=repluser password=123 host=192.168.50.110 port=5432 sslmode=disable sslcompression=1' $vi /data/pg/data/recovery.conf #增加application_name,這個引數和主庫中synchronous_standby_names指定的對應值一樣. standby_mode = 'on' primary_conninfo = 'application_name=pg02 user=repluser password=123 host=192.168.50.110 port=5432 sslmode=disable sslcompression=1' recovery_target_timeline = 'latest' # 這個說明這個流複製同步到最新的資料 ---4.3 修改備庫的pg02的postgresql.conf vi /data/pg/data/postgresql.conf 64 max_connections = 1000 ＃ 一般查多於寫的應用從庫的最大連線數要比較大 245 hot_standby = on 255 hot_standby_feedback = on ---4.4 備庫pg02啟動 pg_ctl start $ cat /data/pg/data/pg_log/pg01-2015-09-21_151458.log LOG: database system was shut down in recovery at 2015-09-21 15:14:29 CST LOG: entering standby mode LOG: redo starts at 0/30002E8 LOG: consistent recovery state reached at 0/30003C0 LOG: database system is ready to accept read only connections LOG: record with zero length at 0/30003C0 LOG: started streaming WAL from primary at 0/3000000 on timeline 1 **************************************************** 5.複製監控 **************************************************** select pid,state,client_addr,sync_priority,sync_state from pg_stat_replication; pid | state | client_addr | sync_priority | sync_state -------+-----------+----------------+---------------+------------ 65392 | streaming | 192.168.50.120 | 1 | sync (1 row) +-----+----------+----------+------------------+----------------+-----------------+-------------+-------------------------------+--------------+-----------+---------------+----------------+----------------+-----------------+---------------+------------+ | pid | usesysid | usename | application_name | client_addr | client_hostname | client_port | backend_start | backend_xmin | state | sent_location | write_location | flush_location | replay_location | sync_priority | sync_state | +-----+----------+----------+------------------+----------------+-----------------+-------------+-------------------------------+--------------+-----------+---------------+----------------+----------------+-----------------+---------------+------------+ | 632 | 16384 | repluser | pg02 | 192.168.50.120 | NULL | 36746 | 2015-09-21 17:17:41.730857+08 | 1826 | streaming | 0/3002718 | 0/3002718 | 0/3002718 | 0/3002718 | 1 | sync | +-----+----------+----------+------------------+----------------+-----------------+-------------+-------------------------------+--------------+-----------+---------------+----------------+----------------+-----------------+---------------+------------+ 1 row in set pid | 8467 # sender的程序 usesysid | 44673 # 複製的使用者id usename | replica # 複製的使用者使用者名稱 application_name | walreceiver client_addr | 10.12.12.12 # 複製的客戶端地址 client_hostname | client_port | 55804 # 複製的客戶端埠 backend_start | 2015-05-12 07:31:16.972157+08 # 這個主從搭建的時間 backend_xmin | state | streaming # 同步狀態 startup: 連線中、catchup: 同步中、streaming: 同步 sent_location | 3/CF123560 # Master傳送WAL的位置 write_location | 3/CF123560 # Slave接收WAL的位置 flush_location | 3/CF123560 # Slave同步到磁碟的WAL位置 replay_location | 3/CF123560 # Slave同步到資料庫的WAL位置 sync_priority | 0 #同步Replication的優先度 0: 非同步、1～?: 同步(數字越小優先度越高) sync_state | async # 有三個值，async: 非同步、sync: 同步、potential: 雖然現在是非同步模式，但是有可能升級到同步模式