确认连接信息

客户端工具通过数据库主节点连接数据库。因此连接前，需获取数据库主节点所在服务器的IP地址及数据库主节点的端口号信息。

操作步骤

1. 以操作系统用户omm登录数据库主节点。

2. 使用“gs_ctl query -D /home/dbuser/env_test/data”命令查询openGauss各实例情况。

   gs_ctl query -D /home/dbuser/env_test/data
   

   [2022-01-08 17:21:26.569][15657][][gs_ctl]: gs_ctl query ,datadir is /home/dbuser/env_test/data 
    HA state:           
   	local_role                     : Primary
   	static_connections             : 1
   	db_state                       : Normal
   	detail_information             : Normal
   
    Senders info:       
   	sender_pid                     : 15464
   	local_role                     : Primary
   	peer_role                      : Standby
   	peer_state                     : Normal
   	state                          : Streaming
   	sender_sent_location           : 0/4000148
   	sender_write_location          : 0/4000148
   	sender_flush_location          : 0/4000148
   	sender_replay_location         : 0/4000148
   	receiver_received_location     : 0/4000148
   	receiver_write_location        : 0/4000148
   	receiver_flush_location        : 0/4000148
   	receiver_replay_location       : 0/4000148
   	sync_percent                   : 100%
   	sync_state                     : Sync
   	sync_priority                  : 1
   	sync_most_available            : Off
   	channel                        : 10.244.42.115:65301-->10.244.181.97:35446
   
    Receiver info:      
   No information
   

   如上部署了数据库主节点实例的服务器IP地址分别为10.244.42.115。数据库主节点数据路径为“/home/dbuser/env_test/data”。“Primary”表示数据库主机节点；“Normal”表示openGauss可用，且数据有冗余备份，所有进程都在运行，主备关系正常。

3. 确认数据库主节点的端口号。

   在2查到的数据库主节点数据路径下的postgresql.conf文件中查看端口号信息。示例如下：

   cat /srv/BigData/gaussdb/data1/dbnode/postgresql.conf | grep port
   

   port = 8000    # (change requires restart)
   #comm_sctp_port = 1024   # Assigned by installation (change requires restart)
   #comm_control_port = 10001  # Assigned by installation (change requires restart)
         # supported by the operating system:
         # e.g. 'localhost=10.145.130.2 localport=12211 remotehost=10.145.130.3 remoteport=12212, localhost=10.145.133.2 localport=12213 remotehost=10.145.133.3 remoteport=12214'
         # e.g. 'localhost=10.145.130.2 localport=12311 remotehost=10.145.130.4 remoteport=12312, localhost=10.145.133.2 localport=12313 remotehost=10.145.133.4 remoteport=12314'
         #   %r = remote host and port
   alarm_report_interval = 10
   support_extended_features=true
   

   8000为数据库主节点的端口号。