Consul 物理机集群部署与测试
in Tutorial with 0 comment
测试 Consul 集群部署
Consul 物理机集群部署与测试
in Tutorial with 0 comment

测试 Consul 集群部署

现在 consul 版本更新为 1.0.7 ，更新内容比较多，建议使用 1.0.7 版本代替。

部署

基于197、198、199这三台机去部署

第一步：

cd ~
wget https://releases.hashicorp.com/consul/1.0.7/consul_1.0.7_linux_amd64.zip
unzip consul_1.0.7_linux_amd64.zip
rm consul_1.0.7_linux_amd64.zip
sudo mv ./consul /usr/local/bin/consul
cd /usr/local/bin/
sudo chmod +x consul
sudo adduser consul

可以通过consul --version检查是否安装成功。

第二步：

选择/data作为数据存储盘，创建数据存储目录并修改权限

sudo mkdir -p /data/production/consul
sudo chown consul:consul /data/production/consul

第三步：

创建配置目录和配置文件

sudo mkdir -p /etc/consul.d/server
cd /etc/consul.d/server
sudo touch config.json

第四步：

创建 /etc/systemd/system/consul.service 文件

sudo vim /etc/systemd/system/consul.service

复制粘贴下面的内容到/etc/systemd/system/consul.service，然后保存退出

[Unit]
Description=Consul service discovery agent
Requires=network-online.target
After=network.target

[Service]
EnvironmentFile=-/etc/sysconfig/consul
Restart=on-failure
ExecStartPre=/usr/local/bin/consul validate /etc/consul.d/server
ExecStart=/usr/local/bin/consul agent $OPTIONS -config-dir=/etc/consul.d/server
ExecReload=/bin/kill -s HUP $MAINPID
KillSignal=SIGINT
TimeoutStopSec=10

[Install]
WantedBy=multi-user.target

每台服务器重复上面四个步骤

第五步：

先执行 keygen，生成的 key 用于作为节点组成同一个集群的唯一标识，下面的配置文件时需要用到这个key。

consul keygen
AfvvDUiBCYNiz9aPwamu/g==

第六步：

选择 197 作为 bootstrap server，同时也作为可以打开 ui 控制台

vim /etc/consul.d/server/config.json

配置如下：

{
    "domain": "prodenv",
    "advertise_addr": "172.25.52.197",
    "bind_addr": "172.25.52.197",
    "client_addr": "172.25.52.197",
    "ports": {
        "dns": 53,
        "http": 28500,
        "serf_lan": 28301,
        "serf_wan": 28302,
        "server": 28300
    },
    "dns_config": {
        "allow_stale": true,
        "max_stale": "15s"
    },
    "recursors": ["8.8.8.8"],
    "ui": true,
    "datacenter": "dc-luogang",
    "data_dir": "/data/production/consul",
    "encrypt": "EXz7LFN8hpQ4id8EDYiFoQ==",
    "log_level": "INFO",
    "enable_syslog": true,
    "enable_debug": true,
    "node_name": "luogang-node-01",
    "bootstrap": true,
    "server": true,
    "enable_script_checks": true,
    "bootstrap_expect": 1,
    "leave_on_terminate": false,
    "skip_leave_on_interrupt": true,
    "rejoin_after_leave": true,
    "retry_join": [
        "172.25.52.197:28301",
        "172.25.52.198:28301",
        "172.25.52.199:28301"
    ]
}

198和199的配置则为下面的，ip 要修改为对应的 ip ，还有node_name也要修改

{
    "domain": "prodenv",
    "advertise_addr": "172.25.52.198",
    "bind_addr": "172.25.52.198",
    "client_addr": "172.25.52.198",
    "ports": {
        "dns": 53,
        "http": 28500,
        "serf_lan": 28301,
        "serf_wan": 28302,
        "server": 28300
    },
    "dns_config": {
        "allow_stale": true,
        "max_stale": "15s"
    },
    "recursors": ["8.8.8.8"],
    "datacenter": "dc-luogang",
    "data_dir": "/data/production/consul",
    "encrypt": "EXz7LFN8hpQ4id8EDYiFoQ==",
    "log_level": "INFO",
    "enable_syslog": true,
    "enable_debug": true,
    "node_name": "luogang-node-02",
    "server": true,
    "enable_script_checks": true,
    "leave_on_terminate": false,
    "skip_leave_on_interrupt": true,
    "rejoin_after_leave": true,
    "retry_join": [
        "172.25.52.197:28301",
        "172.25.52.198:28301",
        "172.25.52.199:28301"
    ]
}

配置完成后，就到最后一步了

第七步：

启动服务

sudo systemctl daemon-reload
sudo systemctl enable consul
sudo systemctl start consul
sudo systemctl status consul

访问 http://172.25.52.197:28500/ui/ 可看到详细集群节点情况

测试

注册服务

curl http://172.25.52.199:28500/v1/agent/service/register -X PUT -i -H "Content-Type:application/json" -d '{
 "ID": "userServiceId",
 "Name": "userService",
 "Tags": [
   "primary",
   "v1"
 ],
 "Address": "127.0.0.1",
 "Port": 8000,
 "EnableTagOverride": false,
 "Check": {
   "DeregisterCriticalServiceAfter": "90m",
   "HTTP": "http://www.baidu.com",
   "Interval": "20s"
 }
}'

响应返回

HTTP/1.1 200 OK
Date: Mon, 09 Apr 2018 09:45:42 GMT
Content-Length: 0
Content-Type: text/plain; charset=utf-8

服务发现

curl http://172.25.52.197:28500/v1/catalog/service/userService

响应返回

[{"ID":"8e7854a7-cdb2-073e-7faa-d5217c2a35d8","Node":"luogang-node-03","Address":"172.25.52.199","Datacenter":"dc-luogang","TaggedAddresses":{"lan":"172.25.52.199","wan":"172.25.52.199"},"NodeMeta":{"consul-network-segment":""},"ServiceID":"userServiceId","ServiceName":"userService","ServiceTags":["primary","v1"],"ServiceAddress":"127.0.0.1","ServicePort":8000,"ServiceEnableTagOverride":false,"CreateIndex":1496,"ModifyIndex":1496}]

DNS 测试

dig @172.25.52.198 userService.service.prodenv

响应返回

; <<>> DiG 9.9.4-RedHat-9.9.4-51.el7_4.2 <<>> @172.25.52.198 userService.service.prodenv
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 261
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;userService.service.prodenv.    IN    A

;; ANSWER SECTION:
userService.service.prodenv. 0    IN    A    127.0.0.1

;; Query time: 0 msec
;; SERVER: 172.25.52.198#53(172.25.52.198)
;; WHEN: 一 4月 09 18:21:14 CST 2018
;; MSG SIZE  rcvd: 69

拿到 userService.service.prodenv 所对应的 ip 地址127.0.0.1

注销服务

执行下面的命令即可注销服务

curl -X PUT http://172.25.52.199:28500/v1/agent/service/deregister/userServiceId

测试完毕~

本文由 Chakhsu Lau 创作，采用 知识共享署名4.0 国际许可协议进行许可。
本站文章除注明转载/出处外，均为本站原创或翻译，转载前请务必署名。

← → ↓ ↑
Responses