PostgreSQL配置Streaming Replication集群
2. 安装PostgreSQL
1)在Primary和Standy节点上安装PostgreSQL软件,安装路径为/opt/pgsql-9.1.2
2)设置postgres用户的环境变量
PGHOME=/opt/pgsql-9.1.2
PGDATA=/storage0/database/postgres/main
PATH=$PG_HOME/bin:$PATH:$HOME/bin
3. Primary节点
1)切换到postgres用户
$su - postgres
2)初始化数据库
$initdb
3)配置pg_hba.conf
在# IPv4 local connections下面添加一行,设置PostgreSQL的访问及其权限
host all all 192.168.111.1/24 trust
在# replication privilege.下面添加一行,设置replication用户及权限
host replication postgres 192.168.111.1/24 trust
4)配置postgresql.conf
配置监听,修改listen_addresses = 'localhost'
listen_addresses = '*'# what IP address(es) to listen on;
配置Primary Replication参数
wal_level = hot_standby
max_wal_senders = 5
wal_keep_segments = 32
archive_mode = on
archive_command = 'cp %p /storage0/database/postgres/archive/%f
"/storage0/database/postgres/archive"是Replication的archive的存储路径。PostgreSQL会将Replication的WAL保存在 "/storage0/database/postgres/archive"路径下。
5) 启动Primary上的PostgreSQL数据库
$pg_ctl start
6) 在primary上执行以下命令
$psql -c "SELECT pg_start_backup('label', true)"
将Primary的PGDATA目录下的文件,,除了postmaster.pid复制到Standby节点的“/storage0/database/postgres/main”目录下,该目录是 Standby节点上的PostgreSQL数据库的PGDATA目录。
$rsync -a ${PGDATA}/ postgres@192.168.111.151:/storage0/database/postgres/main --exclude postmaster.pid
$psql -c "SELECT pg_stop_backup()"
192.168.111.151的/storage0/database/postgres/main目录下的内容为
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