From a1637c8675c19814d31b0b71cbad8e681bb84534 Mon Sep 17 00:00:00 2001 From: zhang_xubo <2578876417@qq.com> Date: Thu, 18 Feb 2021 14:43:44 +0800 Subject: [PATCH] start cluster on one node --- .../zh/post/xingchen/cluster_on_one_node.md | 220 ++++++++++++++++++ 1 file changed, 220 insertions(+) create mode 100644 content/zh/post/xingchen/cluster_on_one_node.md diff --git a/content/zh/post/xingchen/cluster_on_one_node.md b/content/zh/post/xingchen/cluster_on_one_node.md new file mode 100644 index 00000000..7b796c7c --- /dev/null +++ b/content/zh/post/xingchen/cluster_on_one_node.md @@ -0,0 +1,220 @@ ++++ +title = "在一台服务器上安装主备集群" +date = "2021-02-18" +tags = ["在一台服务器上安装主备集群"] +archives = "2021-02-18" +author = "xingchen" +summary = "在一台服务器上安装主备集群" +img = "/zh/post/xingchen/title/img1.png" +times = "14:30" ++++ + + +默认使用openGauss的OM工具去安装主备集群，是要求主备分别在不同的服务器上的，即一台服务器只能安装一个数据库实例。 +可以在一台服务器上安装多个单机数据库，通过修改配置建立主备关系，以达到一个服务器上安装数据库集群的效果。 + +***这种方式下，是不能通过OM工具来管理集群的。只能使用数据库内部工具操作。*** + +以下步骤以一主一备为例，一主多备类似。 + +### 安装两个单机数据库 + +可以通过使用OM工具安装两个单机数据库，保证两个数据库端口不同，数据目录不同。 + +或者直接使用编译安装的方式，启动两个不同端口和数据目录的数据库。 + +***注意： 两个数据库的端口不要挨得太近。*** + +如下面，启动两个数据库，端口分别是12000和22000 + +``` +[opengauss@ecs-761c dn_22000]$ ps -ef | grep gauss | grep -v grep +root 9789 9532 0 10:49 pts/1 00:00:00 su - opengauss +opengau+ 17649 1 2 11:06 pts/1 00:00:02 /usr/local/opengauss/1.1.0/bin/gaussdb -D /home/opengauss/datanode/dn_12000 +opengau+ 18357 1 2 11:08 pts/1 00:00:01 /usr/local/opengauss/1.1.0/bin/gaussdb -D /home/opengauss/datanode/dn_22000 +``` + +``` +[opengauss@ecs-761c dn_22000]$ netstat -nap | grep gauss +(Not all processes could be identified, non-owned process info + will not be shown, you would have to be root to see it all.) +tcp 0 0 127.0.0.1:12000 0.0.0.0:* LISTEN 17649/gaussdb +tcp 0 0 127.0.0.1:12001 0.0.0.0:* LISTEN 17649/gaussdb +tcp 0 0 127.0.0.1:22000 0.0.0.0:* LISTEN 18357/gaussdb +tcp 0 0 127.0.0.1:22001 0.0.0.0:* LISTEN 18357/gaussdb +tcp6 0 0 ::1:12000 :::* LISTEN 17649/gaussdb +tcp6 0 0 ::1:12001 :::* LISTEN 17649/gaussdb +tcp6 0 0 ::1:22000 :::* LISTEN 18357/gaussdb +tcp6 0 0 ::1:22001 :::* LISTEN 18357/gaussdb +udp6 0 0 ::1:49528 ::1:49528 ESTABLISHED 17649/gaussdb +udp6 0 0 ::1:45521 ::1:45521 ESTABLISHED 18357/gaussdb +unix 2 [ ACC ] STREAM LISTENING 56069 18357/gaussdb /tmp/.s.PGSQL.22000 +unix 2 [ ACC ] STREAM LISTENING 56072 18357/gaussdb /tmp/.s.PGSQL.22001 +unix 2 [ ACC ] STREAM LISTENING 54146 17649/gaussdb /tmp/.s.PGSQL.12000 +unix 2 [ ACC ] STREAM LISTENING 54149 17649/gaussdb /tmp/.s.PGSQL.12001 + +``` + +### 以主机或备机模式分别启动数据库 + +选择一个实例作为主机，以primary方式重启数据库。 + +以dn_12000为例，作为主机，重启： + +``` +gs_ctl restart -D /home/opengauss/datanode/dn_12000 -M primary +``` +启动完成后查询： +``` +gs_ctl query -D /home/opengauss/datanode/dn_12000 +``` +``` +[2021-02-18 11:11:14.687][19947][][gs_ctl]: gs_ctl query ,datadir is /home/opengauss/datanode/dn_12000 + HA state: + local_role : Primary + static_connections : 0 + db_state : Normal + detail_information : Normal + + Senders info: +No information + Receiver info: +No information +``` +local_role为Primary，即以primary方式启动成功。该机器作为主机。 + +同理，将另外一个实例dn_22000作为备机启动： +``` +gs_ctl restart -D /home/opengauss/datanode/dn_22000 -M standby +``` +查询状态： +``` +gs_ctl query -D /home/opengauss/datanode/dn_22000 + +[2021-02-18 11:15:57.003][21884][][gs_ctl]: gs_ctl query ,datadir is /home/opengauss/datanode/dn_22000 + HA state: + local_role : Standby + static_connections : 0 + db_state : Need repair + detail_information : Disconnected + + Senders info: +No information + Receiver info: +No information +``` + +### 修改主备实例的配置 + +使用如下命令，分别修改主备实例的配置： +``` +gs_guc set -D {dn} -c "replconninfo1='localhost={localhost} localport={localport} localheartbeatport={localeHeartPort} localservice={localservice} remotehost={remoteNode} remoteport={remotePort} remoteheartbeatport={remoteHeartPort} remoteservice={remoteservice}'" +gs_guc set -D {dn} -c 'remote_read_mode=off'; +gs_guc set -D {dn} -c 'replication_type=1'; +``` +{dn} 数据目录 +{localhost} 本地数据库绑定的ip地址 +{localport} 一般为port地址+1 +{localeHeartPort} 设置为port+4，不冲突即可 +{localservice} 设置为port+5，不冲突即可 +{remoteNode} 远端数据库绑定的ip地址。因为同一台机器，地址与localhost相同 +{remotePort} 远端port地址+1 + +示例： +主机实例dn_12000设置： +``` +gs_guc set -D /home/opengauss/datanode/dn_12000 -c "replconninfo1='localhost=127.0.0.1 localport=12001 localheartbeatport=12004 localservice=12005 remotehost=127.0.0.1 remoteport=22001 remoteheartbeatport=22004 remoteservice=22005'" +gs_guc set -D /home/opengauss/datanode/dn_12000 -c 'remote_read_mode=off'; +gs_guc set -D /home/opengauss/datanode/dn_12000 -c 'replication_type=1'; +``` +备机实例dn_22000设置： +``` +gs_guc set -D /home/opengauss/datanode/dn_22000 -c "replconninfo1='localhost=127.0.0.1 localport=22001 localheartbeatport=22004 localservice=22005 remotehost=127.0.0.1 remoteport=12001 remoteheartbeatport=12004 remoteservice=12005'" +gs_guc set -D /home/opengauss/datanode/dn_22000 -c 'remote_read_mode=off'; +gs_guc set -D /home/opengauss/datanode/dn_22000 -c 'replication_type=1'; +``` + +### 重建备机 + +重启备机： +``` +gs_ctl restart -D /home/opengauss/datanode/dn_22000 -M standby +``` + +重建备机： +``` +gs_ctl build -D /home/opengauss/datanode/dn_22000 -M standby +``` +重建成功后，主备安装成功。 + +### 查询主备状态 + +使用gs_ctl指定主机的数据库目录查询状态： +``` +gs_ctl query -D /home/opengauss/datanode/dn_12000 +``` +如下，表示主备建立成功： +``` +[2021-02-18 11:58:29.295][54782][][gs_ctl]: gs_ctl query ,datadir is /home/opengauss/datanode/dn_12000 + HA state: + local_role : Primary + static_connections : 0 + db_state : Normal + detail_information : Normal + + Senders info: + sender_pid : 44560 + local_role : Primary + peer_role : Standby + peer_state : Normal + state : Streaming + sender_sent_location : 0/4001720 + sender_write_location : 0/4001720 + sender_flush_location : 0/4001720 + sender_replay_location : 0/4001720 + receiver_received_location : 0/4001720 + receiver_write_location : 0/4001720 + receiver_flush_location : 0/4001720 + receiver_replay_location : 0/4001720 + sync_percent : 100% + sync_state : Sync + sync_priority : 1 + sync_most_available : Off + channel : 127.0.0.1:12001-->127.0.0.1:51698 + + Receiver info: +No information +``` + +### 验证 + +登录主机并建立表： +``` +[opengauss@ecs-761c dn_12000]$ gsql -d postgres -p 12000 -r +gsql ((openGauss 1.1.0 build 392c0438) compiled at 2020-12-31 20:08:06 commit 0 last mr ) +Non-SSL connection (SSL connection is recommended when requiring high-security) +Type "help" for help. + +postgres=# create table t1(id int); +CREATE TABLE +postgres=# \q + +``` + +登录备机查询表是否存在： +``` +[opengauss@ecs-761c dn_12000]$ gsql -d postgres -p 22000 -r +gsql ((openGauss 1.1.0 build 392c0438) compiled at 2020-12-31 20:08:06 commit 0 last mr ) +Non-SSL connection (SSL connection is recommended when requiring high-security) +Type "help" for help. + +postgres=# \d + List of relations + Schema | Name | Type | Owner | Storage +--------+------+-------+-----------+---------------------------------- + public | t1 | table | opengauss | {orientation=row,compression=no} +(1 row) + +postgres=# + +``` \ No newline at end of file -- Gitee