consul-常用命令

1、consul 是B/C架构。服务端和客户端包是一样的。差别在于启动时候的参数。

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--客户端 ./consul  agent  -join=172.29.2.65:8301  -bind=172.29.3.164 -client=172.29.3.164   -data-dir=/app/consul/data  -node=client1 -encrypt=eOC89RMstTVHq92WTb8ExQ==   --服务端 nohup consul agent -server -bind=0.0.0.0 -client=0.0.0.0 -bootstrap-expect=1 -data-dir=/app/consul/data/server -node=server1  -encrypt=eOC89RMstTVHq92WTb8ExQ==  -ui   &

2、常用命令

查看成员
[root@LAPP-V576 ~]# consul members
Node     Address            Status  Type    Build  Protocol  DC   Segment
server1  172.29.2.65:8301   alive   server  1.0.7  2         dc1  <all>
client1  172.29.3.164:8301  alive   client  1.0.7  2         dc1  <default>


产生公用的秘钥：

[root@LAPP-V576 ~]# consul  keygen
hHps7HHRPFvswm5VPeRx1g==

查看版本号：

[root@LAPP-V576 ~]# consul  version
Consul v1.0.7
Protocol 2 spoken by default, understands 2 to 3 (agent will automatically use protocol >2 when speaking to compatible agents)

4、consul服务查询和post 手工模拟注册服务

手工注册一个服务：
 curl -X PUT -d '' http://172.29.3.164:8500/v1/catalog/register

查看当前的node
[root@LAPP-V454 bin]#  curl 172.29.3.164:8500/v1/catalog/nodes
[{"ID":"","Node":"client1","Address":"172.29.3.164","Datacenter":"dc1","TaggedAddresses":null,"Meta":null,"CreateIndex":241,"ModifyIndex":471},{"ID":"601cd493-489e-3efa-f6b7-fa7fa1e95caa","Node":"server1","Address":"172.29.2.65","Datacenter":"dc1","TaggedAddresses":{"lan":"172.29.2.65","wan":"172.29.2.65"},"Meta":{"consul-network-segment":""},"CreateIndex":5,"ModifyIndex":6}][root@LAPP-V454 bin]# 

查看服务：
[root@LAPP-V454 bin]# dig @172.29.3.164 -p 8600  test01.node.consul  SRV

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6_4.6 <<>> @172.29.3.164 -p 8600 test01.node.consul SRV
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62327
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;test01.node.consul.            IN      SRV

;; Query time: 0 msec
;; SERVER: 172.29.3.164#8600(172.29.3.164)
;; WHEN: Wed Oct 16 16:56:59 2019
;; MSG SIZE  rcvd: 36

5、consul服务注册、健康检查和查询

{
  "ID": "userServiceId", //服务id
  "Name": "userService", //服务名
  "Tags": [              //服务的tag，自定义，可以根据这个tag来区分同一个服务名的服务
    "primary",
    "v1"
  ],
  "Address": "127.0.0.1",//服务注册到consul的IP，服务发现，发现的就是这个IP
  "Port": 8000,          //服务注册consul的PORT，发现的就是这个PORT
  "EnableTagOverride": false,
  "Check": {             //健康检查部分
    "DeregisterCriticalServiceAfter": "90m",
    "HTTP": "http://www.baidu.com", //指定健康检查的URL，调用后只要返回20X，consul都认为是健康的
    "Interval": "10s"   //健康检查间隔时间，每隔10s，调用一次上面的URL
  }
}

启动本机上的tomcat
保证
http://172.29.3.164:8080 返回200

注册服务
curl -X PUT -d '{"Datacenter": "dc1","Service": {"Service": "test01", "tags": ["dev"],"address": "172.29.3.164", "Port": 8080 
 "checks": [  {  
            "http": "http://172.29.3.164:8080",  
            "interval": "5s"  
        }  
}}' http://172.29.3.164:8500/v1/catalog/register


查找服务：
curl http://172.29.2.65:8500/v1/catalog/service/test01
[{"ID":"e2f76ac4-4086-f85e-8eeb-d67c7e46e30a","Node":"client1","Address":"172.29.3.164","Datacenter":"dc1","TaggedAddresses":{"lan":"172.29.3.164","wan":"172.29.3.164"},"NodeMeta":{"consul-network-segment":""},"ServiceID":"test01","ServiceName":"test01","ServiceTags":["ceis","font"],"ServiceAddress":"172.29.3.164","ServiceMeta":{},"ServicePort":8080,"ServiceEnableTagOverride":false,"CreateIndex":749,"ModifyIndex":749}][root@LAPP-V454 yyapp]# 

返回结果测试：

6、consul 常用其他

注销微服务
curl -s -X PUT "http://$CONSUL_NODE/v1/agent/service/maintenance/$SERVER_ID?enable=true&reason=Deploy_New_Versiont"

# 等待30秒
sleep 30

# 注销旧服务
curl -s -X PUT "http://$CONSUL_NODE/v1/agent/service/deregister/$SERVER_ID"

curl -s -X PUT "http://172.29.2.65:8500/v1/agent/service/maintenance/test01?enable=true&reason=Deploy_New_Versiont"

curl -s -X PUT "http://172.29.2.65:8500/v1/agent/service/deregister/test01"

测试效果图：