查看成员：`curl http://127.0.0.1:8500/v1/agent/members|python -m json.tool` 或者`consul members` 登录到agent所在机器（如果不登录agent机器，就需要在后面的api地址中把127.0.0.1改成具体的agent ip地址） 1、注册一个服务 curl -X PUT -d '{ "ID": "testcluster-DBA-cslg", "Name": "testcluster-DBA-cslg", "Tags": [ "slave", "v1" ], "Address": "10.200.131.6", "Port": 3306, "Meta": { "mysql_version": "5.7" }, "EnableTagOverride": true, "Weights": { "Passing": 10, "Warning": 1 } }' http://127.0.0.1:8500/v1/agent/service/register 查看注册的服务：`curl http://127.0.0.1:8500/v1/agent/services |python -m json.tool` 注册成功后，可通过DNS解析出来：`dig testcluster-DBA-cslg.service.test.com` ; <<>> DiG 9.9.4-RedHat-9.9.4-73.el7_6 <<>> testcluster-DBA-cslg.service.test.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47128 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 2 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;testcluster-DBA-cslg.service.test.com. IN A ;; ANSWER SECTION: testcluster-DBA-cslg.service.test.com. 0 IN A 10.200.131.6 ;; ADDITIONAL SECTION: testcluster-DBA-cslg.service.test.com. 0 IN TXT "consul-network-segment=" ;; Query time: 1 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue May 21 16:47:34 CST 2019 ;; MSG SIZE rcvd: 118 2、注册健康检查脚本 curl -X PUT -d ' { "id": "mysql-status", "name": "mysql-status", "Args": ["/usr/local/dba/check_mysql.sh"], "Shell": "/bin/bash", "timeout": "1s", "Interval": "10s", "ServiceID":"testcluster-DBA-cslg" }' http://127.0.0.1:8500/v1/agent/check/register 3、查看检查状态 [root@cslg-10-200-131-6 checks]# curl http://127.0.0.1:8500/v1/agent/checks |python -m json.tool { "mysql-status": { "CheckID": "mysql-status", "CreateIndex": 0, "Definition": {}, "ModifyIndex": 0, "Name": "mysql-status", "Node": "consulagent", "Notes": "", "Output": "mysql: [Warning] Using a password on the command line interface can be insecure.\n", "ServiceID": "testcluster-DBA-cslg", "ServiceName": "testcluster-DBA-cslg", "ServiceTags": [ "slave", "v1" ], "Status": "passing" } } 目前服务与check已经关联，现在status是passing状态，表示是OK的：dig测试： [root@cslg-10-200-131-6 checks]# dig testcluster-DBA-cslg.service.test.com ; <<>> DiG 9.9.4-RedHat-9.9.4-73.el7_6 <<>> testcluster-DBA-cslg.service.test.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25723 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 2 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;testcluster-DBA-cslg.service.test.com. IN A ;; ANSWER SECTION: testcluster-DBA-cslg.service.test.com. 0 IN A 10.200.131.6 ;; ADDITIONAL SECTION: testcluster-DBA-cslg.service.test.com. 0 IN TXT "consul-network-segment=" ;; Query time: 2 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue May 21 16:59:09 CST 2019 ;; MSG SIZE rcvd: 118 是可以正常解析出服务地址 登录mysql进行测试： [root@cslg-10-200-131-6 ~]# mysql -h testcluster-DBA-cslg.service.test.com -uroot -p -e "select 1;" mysql: [Warning] Using a password on the command line interface can be insecure. +---+ | 1 | +---+ | 1 | +---+ 服务的健康状态，是否提供服务，是可以通过自动或者主动来屏蔽和开启的。 curl --request PUT "http://127.0.0.1:8500/v1/agent/service/maintenance/testcluster-DBA-cslg?enable=true&reason=test" 如下是详细测试： #开启服务维护 [root@cslg-10-200-131-6 checks]# curl --request PUT "http://127.0.0.1:8500/v1/agent/service/maintenance/testcluster-DBA- cslg?enable=true&reason=test" [root@cslg-10-200-131-6 checks]# [root@cslg-10-200-131-6 checks]# [root@cslg-10-200-131-6 checks]# dig testcluster-DBA-cslg.service.test.com ; <<>> DiG 9.9.4-RedHat-9.9.4-73.el7_6 <<>> testcluster-DBA-cslg.service.test.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 42845 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;testcluster-DBA-cslg.service.test.com. IN A ;; AUTHORITY SECTION: test.com. 0 IN SOA ns.test.com. hostmaster.test.com. 1558429594 3600 600 86400 0 ;; Query time: 2 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue May 21 17:06:34 CST 2019 ;; MSG SIZE rcvd: 116 #发现服务已经无法通过DNS解析出来了，API也是一样的这里就不显示了 #如下是取消维护 [root@cslg-10-200-131-6 checks]# curl --request PUT "http://127.0.0.1:8500/v1/agent/service/maintenance/testcluster-DBA- cslg?enable=false&reason=test" [root@cslg-10-200-131-6 checks]# dig testcluster-DBA-cslg.service.test.com ; <<>> DiG 9.9.4-RedHat-9.9.4-73.el7_6 <<>> testcluster-DBA-cslg.service.test.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2968 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 2 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;testcluster-DBA-cslg.service.test.com. IN A ;; ANSWER SECTION: testcluster-DBA-cslg.service.test.com. 0 IN A 10.200.131.6 ;; ADDITIONAL SECTION: testcluster-DBA-cslg.service.test.com. 0 IN TXT "consul-network-segment=" ;; Query time: 2 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Tue May 21 17:06:46 CST 2019 ;; MSG SIZE rcvd: 118