110 lines
2.7 KiB
Markdown
110 lines
2.7 KiB
Markdown
# 部署 PostgreSQL 流复制
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- 按实际环境修改
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- docker-compose.yml
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- pgsql1/conf.d/\*.cnf
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- pgsql2/conf.d/\*.cnf
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- 创建目录
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```
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grep '\<source:' docker-compose.yml | cut -d: -f2 | xargs mkdir -p
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```
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- 启动
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```
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docker-compose up -d
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```
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- 查看日志，直至出现 "PGSQL is ready for connections."
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```
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docker-compose logs pgsql1
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docker-compose logs pgsql2
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```
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- 登录 pgsql1 数据库，创建测试表，写入测试数据
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```
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docker exec -u postgres pgsql1 \
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psql -c "create table t1(id int, name varchar)"
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docker exec -u postgres pgsql1 \
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psql -c "insert into t1 values (1, 'aa'),(2, 'bb')"
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```
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- 登录 pgsql1 数据库，创建同步用户，配置权限
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```
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docker exec -u postgres pgsql1 \
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psql -c "create user replicator login replication password 'Replicator_1234'"
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docker exec -u postgres pgsql1 \
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echo 'host replication replicator pgsql2 trust' >> pgsql1/db/pg_hba.conf
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#docker exec -u postgres pgsql1 pg_ctl reload
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```
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- 增加主库配置
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```
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echo '
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wal_level = hot_standby
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max_wal_senders = 8
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wal_keep_size = 512
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wal_sender_timeout = 60s
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max_connections = 100
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' > pgsql1/conf.d/replication.conf
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- 重启 pgsql1 数据库
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```
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docker-compose restart pgsql1
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```
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- 登录 pgsql2 数据库，同步 pgsql1 的数据目录
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```
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docker exec -u postgres pgsql2 mkdir -p /var/log/pgsql/db_pg1
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docker exec -u postgres pgsql2 \
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pg_basebackup \
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-h pgsql1 \
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-D /var/log/pgsql/db_pg1 \
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-p 5432 \
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-U replicator \
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-Fp -Xs -P -c fast
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```
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- 停止并删除 pgsql2 容器，替换其数据目录，**注意数据目录权限**
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```
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docker-compose stop pgsql2
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docker-compose rm -f pgsql2
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rm -rf pgsql2/db
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mv pgsql2/log/db_pg1 pgsql2/db
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chmod 0750 pgsql2/db
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```
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- 增加从库配置
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```
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echo '
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primary_conninfo = 'host=pgsql1 port=5432 user=replicator'
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recovery_target_timeline = latest
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hot_standby = on
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max_standby_streaming_delay = 30s
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wal_receiver_status_interval = 10s
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hot_standby_feedback = on
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max_connections = 200
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max_worker_processes = 20
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' > pgsql2/conf.d/replication.conf
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```
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- 启动 pgsql2 数据库
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```
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docker-compose up -d pgsql2
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```
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- 登录 pgsql1 数据库，查看从库信息
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```
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docker exec -u postgres pgsql1 \
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psql -c "select
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client_addr,
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usename,
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backend_start,
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application_name,
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sync_state,
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sync_priority
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FROM pg_stat_replication;"
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# 在 pgsql1 里创建数据库、表或更改数据，在 pgsql2 里可以看到
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```
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