GBase 8c教程（三）集群状态监控——MONITOR指令

一、语法规则

GBase 8c的集群状态监控可以使用MONITOR指令实现。

MONITOR使用语法：

gha_ctl MONITOR all/gtm/coordinator/datanode/dcs -l dcslist
MONITOR指令可以分别监控集群gtm、Coordinator、Datanode、DCS节点状态或对集群全部节点状态进行监控。其中**dcslist**为DCS地址，一般情况下可以只列出一个节点地址，其他节点会自动同步消息。为了保证高可用，也可以列出所有节点地址。

二、操作示例：

[gbase@localhost deploy]$ /home/gbase/deploy/bin/gha_ctl monitor all -l http://192.168.142.211:2379,http://192.168.142.212:2379,http://192.168.142.213:2379

返回全部运行成功：

{
    "cluster":"gbase8c",
    "gtm":[
        {
            "host":"192.168.142.210",
            "port":"6666",
            "restPort":"8008",
            "name":"gtm1",
            "workDir":"/home/gbase/data/gtm",
            "state":"running",
            "role":"master"
        }
    ],
    "coordinator":[
        {
            "host":"192.168.142.211",
            "port":"5432",
            "restPort":"8009",
            "name":"cn1",
            "workDir":"/home/gbase/data/coord",
            "state":"running"
        },
        {
            "host":"192.168.142.212",
            "port":"5432",
            "restPort":"8009",
            "name":"cn2",
            "workDir":"/home/gbase/data/coord",
            "state":"running"
        },
        {
            "host":"192.168.142.213",
            "port":"5432",
            "restPort":"8009",
            "name":"cn3",
            "workDir":"/home/gbase/data/coord",
            "state":"running"
        }
    ],
    "datanode":{
        "dn1":[
            {
                "host":"192.168.142.211",
                "port":"5433",
                "restPort":"8011",
                "name":"dn1_1",
                "workDir":"/home/gbase/data/datanode",
                "role":"master",
                "state":"running"
            }
        ],
        "dn2":[
            {
                "host":"192.168.142.212",
                "port":"5433",
                "restPort":"8011",
                "name":"dn2_1",
                "workDir":"/home/gbase/data/datanode",
                "role":"master",
                "state":"running"
            }
        ],
        "dn3":[
            {
                "host":"192.168.142.213",
                "port":"5433",
                "restPort":"8011",
                "name":"dn3_1",
                "workDir":"/home/gbase/data/datanode",
                "role":"master",
                "state":"running"
            }
        ]
    },
    "dcs":{
        "cluster_state":"healthy",
        "members":[
            {
                "url":"http://192.168.142.213:2379",
                "id":"62f9a805ba818264",
                "name":"node_2",
                "state":"healthy",
                "isLeader":false
            },
            {
                "url":"http://192.168.142.211:2379",
                "id":"8ea592db62fb7d92",
                "name":"node_0",
                "state":"healthy",
                "isLeader":true
            },
            {
                "url":"http://192.168.142.212:2379",
                "id":"fbc0fc018ba512fa",
                "name":"node_1",
                "state":"healthy",
                "isLeader":false
            }
        ]
    }
}

该集群中已配置1个GTM节点，3个Coordinator节点及3个Datanode节点（Datanode节点无备机）。