write
version: "3.0"
networks:
etcd-net: # network driver: bridge # Bridge mode
volumes:
etcd1_data: # The data volume name mounted to the local driver: local
etcd2_data:
driver: local
etcd3_data:
driver: local
###
### etcd Other environment configurations are shown in: /etcd/index/index-1/configuration###
services:
etcd1:
image: bitnami/etcd:latest # Mirror container_name: etcd1 # Container name --name restart: always # Always restart networks:
- etcd-net # The network used --network ports: # Port Mapping -p - "20000:2379"
- "20001:2380"
environment: # Environment variable --env - ALLOW_NONE_AUTHENTICATION=yes # Allow login without password - ETCD_NAME=etcd1 # etcd's name - ETCD_INITIAL_ADVERTISE_PEER_URLS=http://etcd1:2380 # List this member's partner URL to advertise to other members of the cluster - ETCD_LISTEN_PEER_URLS=http://0.0.0.0:2380 # List of URLs used to listen to partner communications - ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379 # List of URLs used to listen to client communications - ETCD_ADVERTISE_CLIENT_URLS=http://etcd1:2379 # List the client URL of this member and announce it to other members in the cluster - ETCD_INITIAL_CLUSTER_TOKEN=etcd-cluster # Initialized cluster notation for etcd clusters during startup - ETCD_INITIAL_CLUSTER=etcd1=http://etcd1:2380,etcd2=http://etcd2:2380,etcd3=http://etcd3:2380 # Configure initialization cluster for startup - ETCD_INITIAL_CLUSTER_STATE=new # Initialize cluster status volumes:
- etcd1_data:/bitnami/etcd # Mounted data volume
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
Run docker-compose
[root@centos8 etcdtest]# tree . └── 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]#
Check the build status
Check the node startup status
[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
View mounted data volumes
[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": ""
}
]
Test node
Write a key from etcd1
[root@centos8 etcdtest]# docker exec -it etcd1 bash I have no name!@5454f5a719a2:/opt/bitnami/etcd$ etcdctl put name "i am wxf" OK
Read a value from etcd2
[wxf@centos8 ~]$ docker exec -it etcd2 bash I have no name!@bf989f9512b5:/opt/bitnami/etcd$ etcdctl get name name i am wxf
Build successfully!
Golang interacts with etcd simply
package main
import (
"context"
"fmt"
"/etcd/client/v3"
"time"
)
func main() {
cli, err := ({
Endpoints: []string{"http://192.168.135.10:20000", "http://192.168.135.10:20002", "http://192.168.135.10:20004"},
DialTimeout: 5 * ,
})
if err != nil {
("connect to etcd failed, err:%v\n", err)
return
}
defer ()
("connect to etcd success")
defer ()
go Watch(cli)
Create(cli)
Read(cli)
Delete(cli)
Update(cli)
select {}
}
func Watch(cli *) {
rch := ((), "name") // type WatchChan <-chan WatchResponse
for wresp := range rch {
for _, ev := range {
("Type: %s Key:%s Value:%s\n", , , )
}
}
("out")
}
func Create(cli *) {
// put
ctx, cancel := ((), *5)
_, err := (ctx, "name", "wxf")
cancel()
if err != nil {
("put to etcd failed, err:%v\n", err)
return
}
}
func Read(cli *) {
//get
ctx, cancel := ((), *5)
resp, err := (ctx, "name")
cancel()
if err != nil {
("get from etcd failed, err:%v\n", err)
return
}
for _, ev := range {
("Type: %s Key:%s Value:%s\n", "READ", , )
}
}
func Update(cli *) {
// put
ctx, cancel := ((), *5)
_, err := (ctx, "name", "xyy")
cancel()
if err != nil {
("put to etcd failed, err:%v\n", err)
return
}
}
func Delete(cli *) {
//del
ctx, cancel := ((), *5)
_, err := (ctx, "name")
cancel()
if err != nil {
("delete from etcd failed, err:%v\n", err)
return
}
}
go run
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
This is the article about the implementation steps of docker-compose deployment of etcd cluster. For more related content on docker-compose deployment of etcd cluster, please search for my previous articles or continue browsing the following related articles. I hope everyone will support me in the future!