Consul集羣搭建 2Server+ 3Client

時間 2019-11-15

標籤 consul 集羣搭建 2server server 3client client 欄目負載均衡简体版

原文原文鏈接

環境說明：
192.168.202.177 consul-server01
192.168.202.177 consul-server02
192.168.202.174 mysql server node一、consul client
192.168.202.175 mysql server node二、consul client
192.168.202.176 mysql server node三、consul client
系統版本：centos 7.5
Mysql version：5.7.25
consul version:1.4.4 html

安裝

在官網:https://www.consul.io/downloads.html下載對應的版本，解壓後copy consul 到/usr/local/bin/下便可

分別在5臺機器上安裝而後運行
mkdir -pv /etc/consul.d/ && mkdir -pv /data/consul/ && mkdir -pv /data/consul/shellnode

配置部署mysql

在consul server 192.168.202.177上編寫配置文件linux

[root@consul-server consul]# cat /etc/consul.d/server.json 
{
  "datacenter": "dc1",
  "data_dir": "/data/consul",
  "log_level": "INFO",
  "node_name": "consul-server01",
  "server": true,
  "bootstrap_expect": 1,
  "bind_addr": "192.168.202.177",
  "client_addr": "192.168.202.177",
  "ui":true,
  "retry_join": ["192.168.202.177","192.168.202.178"],
  "retry_interval": "10s",
  "enable_debug": false,
  "rejoin_after_leave": true,
  "start_join": ["192.168.202.177","192.168.202.178"],
  "enable_syslog": true,
  "syslog_facility": "local0"
}

在consul server 192.168.202.178上編寫配置文件web

[root@consul-server02 consul]# cat /etc/consul.d/server.json 
{
"datacenter": "dc1",
"data_dir": "/data/consul",
"log_level": "INFO",
"node_name": "consul-server02",
"server": true,
"bootstrap_expect": 1,
"bind_addr": "192.168.202.178",
"client_addr": "192.168.202.178",
"ui":true,
"retry_join": ["192.168.202.177","192.168.202.178"],
"retry_interval": "10s",
"enable_debug": false,
"rejoin_after_leave": true,
"start_join": ["192.168.202.177","192.168.202.178"],
"enable_syslog": true,
"syslog_facility": "local0"
}

在consul client 192.168.202.17四、192.168.202.17五、192.168.202.176上編寫配置文件,三臺服務器的上bind_addr 修改成響應IP便可sql

[root@node1 consul]# cat /etc/consul.d/client.json
{
  "data_dir": "/data/consul",
  "enable_script_checks": true,
  "bind_addr": "192.168.202.174",
  "retry_join": ["192.168.202.177"],
  "retry_interval": "30s",
  "rejoin_after_leave": true,
  "start_join": ["192.168.202.177"] ,
  "node_name": "node1"
}

在consul client 192.168.202.17四、192.168.202.17五、192.168.202.176上編寫檢測primay 腳本和檢測slave 腳本 shell

 
        [root@node1 consul]# cat /data/consul/shell/check_mysql_mgr_master.sh 
       
        #!/bin/bash 
       
        port=3306 
       
        user= 
        "root" 
       
        passwod= 
        "iforgot" 
       
        comm= 
        "/usr/local/mysql/bin/mysql -u$user -hlocalhost -P $port -p$passwod" 
       
        value=`$comm -Nse  
        "select 1" 
        ` 
       
        primary_member=`$comm -Nse  
        "select variable_value from performance_schema.global_status WHERE VARIABLE_NAME= 'group_replication_primary_member'" 
        ` 
       
        server_uuid=`$comm -Nse  
        "select variable_value from performance_schema.global_variables where VARIABLE_NAME='server_uuid';" 
        ` 
       
        # 判斷MySQL是否存活 
       
        if  
        [ -z $value ] 
       
        then 
       
        echo  
        "mysql $port is down....." 
       
        exit 2 
       
        fi 
       
        # 判斷節點狀態,是否存活 
       
        node_state=`$comm -Nse  
        "select MEMBER_STATE from performance_schema.replication_group_members where MEMBER_ID='$server_uuid'" 
        ` 
       
        if  
        [ $node_state !=  
        "ONLINE"  
        ] 
       
        then 
       
        echo  
        "MySQL $port state is not online...." 
       
        exit 2 
       
        fi 
       
        # 判斷是否是主節點 
       
        if  
        [[ $server_uuid == $primary_member ]] 
       
        then 
       
        echo  
        "MySQL $port Instance is master ........" 
       
        exit 0 
       
        else 
       
        echo  
        "MySQL $port Instance is slave ........" 
       
        exit 2 
       
        fi

 
        [root@node1 consul]# cat /data/consul/shell/check_mysql_mgr_slave.sh 
       
        #!/bin/bash 
       
        port=3306 
       
        user= 
        "root" 
       
        passwod= 
        "iforgot" 
       
        comm= 
        "/usr/local/mysql/bin/mysql -u$user -hlocalhost -P $port -p$passwod" 
       
        value=`$comm -Nse  
        "select 1" 
        ` 
       
        primary_member=`$comm -Nse  
        "select variable_value from performance_schema.global_status WHERE VARIABLE_NAME= 'group_replication_primary_member'" 
        ` 
       
        server_uuid=`$comm -Nse  
        "select variable_value from performance_schema.global_variables where VARIABLE_NAME='server_uuid';" 
        ` 
       
        # 判斷mysql是否存活 
       
        if  
        [ -z $value ] 
       
        then 
       
        echo  
        "mysql $port is down....." 
       
        exit 2 
       
        fi 
       
        # 判斷節點狀態 
       
        node_state=`$comm -Nse  
        "select MEMBER_STATE from performance_schema.replication_group_members where MEMBER_ID='$server_uuid'" 
        ` 
       
        if  
        [ $node_state !=  
        "ONLINE"  
        ] 
       
        then 
       
        echo  
        "MySQL $port state is not online...." 
       
        exit 2 
       
        fi 
       
        # 判斷是否是主節點 
       
        if  
        [[ $server_uuid != $primary_member ]] 
       
        then 
       
        echo  
        "MySQL $port Instance is slave ........" 
       
        exit 0 
       
        else 
       
        node_num=`$comm -Nse  
        "select count(*) from performance_schema.replication_group_members" 
        ` 
       
        # 判斷若是沒有任何從節點，主節點也註冊從角色服務。 
       
        if  
        [ $node_num -eq 1 ] 
       
        then 
       
        echo  
        "MySQL $port Instance is slave ........" 
       
        exit 0 
       
        else 
       
        echo  
        "MySQL $port Instance is master ........" 
       
        exit 2 
       
        fi 
       
        fi

啓動consul server 在192.168.202.17七、192.168.202.178上
nohup consul agent -config-dir=/etc/consul.d > /data/consul/consul.log &

啓動consul client 在192.168.202.17四、192.168.202.17五、192.168.202.176
nohup consul agent -config-dir=/etc/consul.d > /data/consul/consul.log & json

觀察consul server的log日誌3個client自動註冊到了consul上了

查看consul成員bootstrap

[root@consul-server consul]# consul members -http-addr='192.168.202.177:8500'
Node             Address               Status  Type    Build  Protocol  DC   Segment
consul-server01  192.168.202.177:8301  alive   server  1.4.4  2         dc1  <all>
consul-server02  192.168.202.178:8301  alive   server  1.4.4  2         dc1  <all>
node1            192.168.202.174:8301  alive   client  1.4.4  2         dc1  <default>
node2            192.168.202.175:8301  alive   client  1.4.4  2         dc1  <default>
node3            192.168.202.176:8301  alive   client  1.4.4  2         dc1  <default>

訪問consulserver的web頁面 http://192.168.202.177:8500/ui/