我正在尝试使用两台服务器创建一个 postgres 复制配置。这些步骤类似于在 Ubuntu 14.04 上使用 RepMgr 和 PgBouncer 进行 PostgreSQL 9.4 复制
。我使用 repmgr + pgbouncer 作为我的复制配置。假设我有两个主机 dhost1 和 dhost2。Repmgr 元数据 db 是repmgrdb和 user 是repmgr_user。
dhost1 有 pgbouncer 和 Repmgr 的配置,它是 master。dbhost1中Repmgr的配置如下:
cluster = test
node = 1
node_name = dhost1
use_replication_slots = 1
conninfo='host=dhost1 user=repmgr_user dbname=repmgrdb'
pg_bindir=/usr/lib/postgresql/9.5/bin
## repmgr.conf at master ##
dhost2 也有 Repmgr 的配置,它处于从属模式。它的配置在下面提到
cluster = test
node = 2
node_name = dhost2
use_replication_slots = 1
conninfo='host=dhost2 user=repmgr_user dbname=repmgrdb'
pg_bindir=/usr/lib/postgresql/9.5/bin
## repmgr.conf at slave ##
我能够成功注册到 master 并且可以在 cluster show 命令中看到 master。
在从机端,我使用pg_basebackup
命令克隆主机的方法
repmgr -f /etc/repmgr/repmgr.conf --force -h dhost1_ip_address_goes_here> -U repmgr_user -d repmgrdb -v standby clone
对于上述命令,我收到以下错误:
[2016-08-08 10:05:26] [NOTICE] using configuration file "/etc/repmgr/repmgr.conf"
[2016-08-08 10:05:26] [NOTICE] setting data directory to: /var/lib/postgresql/9.5/main
[2016-08-08 10:05:26] [HINT] use -D/--data-dir to explicitly specify a data directory
[2016-08-08 10:05:26] [NOTICE] starting backup (using pg_basebackup)...
[2016-08-08 10:05:26] [HINT] this may take some time; consider using the -c/--fast-checkpoint option
[2016-08-08 10:05:31] [NOTICE] copying configuration files from master
[2016-08-08 10:05:31] [ERROR] aborting, remote host <dhost1_ip_address_goes_here> is not reachable.
[2016-08-08 10:05:31] [ERROR] unable to take a base backup of the master server>
[2016-08-08 10:05:31] [WARNING] destination directory (/var/lib/postgresql/9.5/main) may need to be cleaned up manually
我还为和postgres
之间的用户设置了无密码 ssh 。dhost1
dhost2
我也能够pg_basebackup
从命令中获取
pg_basebackup -h <dhost1_ip_address_goes_here> -P -v -U repmgr_user -X stream -D 9.5/main -R
我是 postgresql 复制的初学者,请给我建议答案。