docker-compose部署etcd集群的实现步骤
作者：cheems~
本文主要介绍了docker-compose部署etcd集群的实现步骤，文中通过示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
编写docker-compose.yml
version: "3.0"
networks:
etcd-net: # 网络
driver: bridge # 桥接模式
volumes:
etcd1_data: # 挂载到本地的数据卷名
driver: local
etcd2_data:
driver: local
etcd3_data:
driver: local
###
### etcd 其他环境配置见：https://doczhcn.gitbook.io/etcd/index/index-1/configuration
###
services:
etcd1:
image: bitnami/etcd:latest # 镜像
container_name: etcd1 # 容器名 --name
restart: always # 总是重启
networks:
- etcd-net # 使用的网络 --network
ports: # 端口映射 -p
- "20000:2379"
- "20001:2380"
environment: # 环境变量 --env
- ALLOW_NONE_AUTHENTICATION=yes # 允许不用密码登录
- ETCD_NAME=etcd1 # etcd 的名字
- ETCD_INITIAL_ADVERTISE_PEER_URLS=http://etcd1:2380 # 列出这个成员的伙伴 URL 以便通告给集群的其他成员
- ETCD_LISTEN_PEER_URLS=http://0.0.0.0:2380 # 用于监听伙伴通讯的URL列表
- ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379 # 用于监听客户端通讯的URL列表
- ETCD_ADVERTISE_CLIENT_URLS=http://etcd1:2379 # 列出这个成员的客户端URL，通告给集群中的其他成员
- ETCD_INITIAL_CLUSTER_TOKEN=etcd-cluster # 在启动期间用于 etcd 集群的初始化集群记号
- ETCD_INITIAL_CLUSTER=etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380 # 为启动初始化集群配置
- ETCD_INITIAL_CLUSTER_STATE=new # 初始化集群状态
volumes:
- etcd1_data:/bitnami/etcd # 挂载的数据卷
etcd2:
image: bitnami/etcd:latest
container_name: etcd2
restart: always
networks:
- etcd-net
ports:
- "20002:2379"
- "20003:2380"
environment:
- ALLOW_NONE_AUTHENTICATION=yes
- ETCD_NAME=etcd2
- ETCD_INITIAL_ADVERTISE_PEER_URLS=http://etcd2:2380
- ETCD_LISTEN_PEER_URLS=http://0.0.0.0:2380
- ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379
- ETCD_ADVERTISE_CLIENT_URLS=http://etcd2:2379
- ETCD_INITIAL_CLUSTER_TOKEN=etcd-cluster
- ETCD_INITIAL_CLUSTER=etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380
- ETCD_INITIAL_CLUSTER_STATE=new
volumes:
- etcd2_data:/bitnami/etcd
etcd3:
image: bitnami/etcd:latest
container_name: etcd3
restart: always
networks:
- etcd-net
ports:
- "20004:2379"
- "20005:2380"
environment:
- ALLOW_NONE_AUTHENTICATION=yes
- ETCD_NAME=etcd3
- ETCD_INITIAL_ADVERTISE_PEER_URLS=http://etcd3:2380
- ETCD_LISTEN_PEER_URLS=http://0.0.0.0:2380
- ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379
- ETCD_ADVERTISE_CLIENT_URLS=http://etcd3:2379
- ETCD_INITIAL_CLUSTER_TOKEN=etcd-cluster
- ETCD_INITIAL_CLUSTER=etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380
- ETCD_INITIAL_CLUSTER_STATE=new
volumes:
- etcd3_data:/bitnami/etcd
运行docker-compose
[root@centos8 etcdtest]# tree . └── docker-compose.yml 0 directories, 1 file [root@centos8 etcdtest]# docker-compose up -d [+] Running 4/4 ⠿ Network etcdtest_etcd-net Created 0.1s ⠿ Container etcd3 Started 0.6s ⠿ Container etcd1 Started 0.7s ⠿ Container etcd2 Started 0.7s [root@centos8 etcdtest]#
检查搭建状态
查看节点启动情况
[root@centos8 etcdtest]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 89469f98491f bitnami/etcd:latest "/opt/bitnami/script…" 54 seconds ago Up 53 seconds 0.0.0.0:20004->2379/tcp, :::20004->2379/tcp, 0.0.0.0:20005->2380/tcp, :::20005->2380/tcp etcd3 5454f5a719a2 bitnami/etcd:latest "/opt/bitnami/script…" 54 seconds ago Up 53 seconds 0.0.0.0:20000->2379/tcp, :::20000->2379/tcp, 0.0.0.0:20001->2380/tcp, :::20001->2380/tcp etcd1 bf989f9512b5 bitnami/etcd:latest "/opt/bitnami/script…" 54 seconds ago Up 53 seconds 0.0.0.0:20002->2379/tcp, :::20002->2379/tcp, 0.0.0.0:20003->2380/tcp, :::20003->2380/tcp etcd2
查看挂载的数据卷
[root@centos8 etcdtest]# docker volume ls DRIVER VOLUME NAME local etcdtest_etcd1_data local etcdtest_etcd2_data local etcdtest_etcd3_data
[root@centos8 etcdtest]# docker inspect etcd1
"Mounts": [
{
"Type": "volume",
"Name": "etcdtest_etcd1_data",
"Source": "/var/lib/docker/volumes/etcdtest_etcd1_data/_data",
"Destination": "/bitnami/etcd",
"Driver": "local",
"Mode": "z",
"RW": true,
"Propagation": ""
}
]
测试节点
从etcd1写一个key
[root@centos8 etcdtest]# docker exec -it etcd1 bash I have no name!@5454f5a719a2:/opt/bitnami/etcd$ etcdctl put name "i am wxf" OK
从etcd2读一个value
[wxf@centos8 ~]$ docker exec -it etcd2 bash I have no name!@bf989f9512b5:/opt/bitnami/etcd$ etcdctl get name name i am wxf
搭建成功！
Golang 与 etcd 简单交互
package main
import (
"context"
"fmt"
"go.etcd.io/etcd/client/v3"
"time"
)
func main() {
cli, err := clientv3.New(clientv3.Config{
Endpoints: []string{"http://192.168.135.10:20000", "http://192.168.135.10:20002", "http://192.168.135.10:20004"},
DialTimeout: 5 * time.Second,
})
if err != nil {
fmt.Printf("connect to etcd failed, err:%v\n", err)
return
}
defer cli.Close()
fmt.Println("connect to etcd success")
defer cli.Close()
go Watch(cli)
Create(cli)
Read(cli)
Delete(cli)
Update(cli)
select {}
}
func Watch(cli *clientv3.Client) {
rch := cli.Watch(context.Background(), "name") // type WatchChan <-chan WatchResponse
for wresp := range rch {
for _, ev := range wresp.Events {
fmt.Printf("Type: %s Key:%s Value:%s\n", ev.Type, ev.Kv.Key, ev.Kv.Value)
}
}
fmt.Println("out")
}
func Create(cli *clientv3.Client) {
// put
ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
_, err := cli.Put(ctx, "name", "wxf")
cancel()
if err != nil {
fmt.Printf("put to etcd failed, err:%v\n", err)
return
}
}
func Read(cli *clientv3.Client) {
//get
ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
resp, err := cli.Get(ctx, "name")
cancel()
if err != nil {
fmt.Printf("get from etcd failed, err:%v\n", err)
return
}
for _, ev := range resp.Kvs {
fmt.Printf("Type: %s Key:%s Value:%s\n", "READ", ev.Key, ev.Value)
}
}
func Update(cli *clientv3.Client) {
// put
ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
_, err := cli.Put(ctx, "name", "xyy")
cancel()
if err != nil {
fmt.Printf("put to etcd failed, err:%v\n", err)
return
}
}
func Delete(cli *clientv3.Client) {
//del
ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
_, err := cli.Delete(ctx, "name")
cancel()
if err != nil {
fmt.Printf("delete from etcd failed, err:%v\n", err)
return
}
}
go run main.go
connect to etcd success
Type: PUT Key:name Value:wxf
Type: READ Key:name Value:wxf
Type: DELETE Key:name Value:
Type: PUT Key:name Value:xyy
Type: PUT Key:name Value:test for terminal
Type: PUT Key:name Value:test for terminal aabbccdd
I have no name!@5454f5a719a2:/opt/bitnami/etcd$ etcdctl put name "test for terminal"
OK
I have no name!@5454f5a719a2:/opt/bitnami/etcd$ etcdctl put name "test for terminal aabbccdd"
OK
到此这篇关于docker-compose部署etcd集群的实现步骤的文章就介绍到这了,更多相关docker-compose部署etcd集群内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！