Docker Etcd cluster(docker搭建Etcd集群)

docker netword

docker network create etcd_cluster

docker network create --subnet 172.16.3.0/16 etcd_cluster

docker network inspect etcd_cluster

#docker network rm etcd_cluster

docker run -itd --rm --network etcd_cluster --ip 172.16.3.0 --name test busybox

etcd cluster

# etcd1
docker run -itd --rm \
    --network etcd_cluster \
    --ip 172.16.3.31 \
    --hostname etcd1 \
    --name etcd1 \
    -e ETCDCTL_API=3 \
    -p 2379:2379 \
    -p 2380:2380 \
    quay.io/coreos/etcd:v3.3.9 \
    etcd --name etcd1 \
    --initial-advertise-peer-urls http://172.16.3.31:2380 \
    --listen-peer-urls http://172.16.3.31:2380 \
    --listen-client-urls http://172.16.3.31:2379,http://127.0.0.1:2379 \
    --advertise-client-urls http://172.16.3.31:2379 \
    --initial-cluster-token etcd-cluster-1 \
    --initial-cluster etcd1=http://172.16.3.31:2380,etcd2=http://172.16.3.32:2380,etcd3=http://172.16.3.33:2380 \
    --initial-cluster-state new
    
  # etcd2  
    docker run -itd --rm \
    --network etcd_cluster \
    --ip 172.16.3.32 \
    --hostname etcd2 \
    --name etcd2 \
    -e ETCDCTL_API=3 \
    -p 22379:2379 \
    -p 22380:2380 \
    quay.io/coreos/etcd:v3.3.9 \
    etcd --name etcd2 \
    --initial-advertise-peer-urls http://172.16.3.32:2380 \
    --listen-peer-urls http://172.16.3.32:2380 \
    --listen-client-urls http://172.16.3.32:2379,http://127.0.0.1:2379 \
    --advertise-client-urls http://172.16.3.32:2379 \
    --initial-cluster-token etcd-cluster-1 \
    --initial-cluster etcd1=http://172.16.3.31:2380,etcd2=http://172.16.3.32:2380,etcd3=http://172.16.3.33:2380 \
    --initial-cluster-state new
  
  # etcd3
    docker run -itd --rm \
    --network etcd_cluster \
    --ip 172.16.3.33 \
    --hostname etcd3 \
    --name etcd3 \
    -e ETCDCTL_API=3 \
    -p 32379:2379 \
    -p 32380:2380 \
    quay.io/coreos/etcd:v3.3.9 \
    etcd --name etcd3 \
    --initial-advertise-peer-urls http://172.16.3.33:2380 \
    --listen-peer-urls http://172.16.3.33:2380 \
    --listen-client-urls http://172.16.3.33:2379,http://127.0.0.1:2379 \
    --advertise-client-urls http://172.16.3.33:2379 \
    --initial-cluster-token etcd-cluster-1 \
    --initial-cluster etcd1=http://172.16.3.31:2380,etcd2=http://172.16.3.32:2380,etcd3=http://172.16.3.33:2380 \
    --initial-cluster-state new
    
 # client
 #进入容器 
docker exec -it etcd1 bin/sh
#客户端测试
etcdctl --write-out=table --endpoints=http://127.0.0.1:2379 member list
etcdctl --endpoints=http://127.0.0.1:2379 put foo bar
etcdctl --endpoints=http://127.0.0.1:2379 get foo

#测试结果如下
[root@bogon ~]# docker exec -it etcd1 bin/sh
/ # etcdctl --write-out=table --endpoints=http://127.0.0.1:2379 member list
+------------------+---------+-------+-------------------------+-------------------------+
|        ID        | STATUS  | NAME  |       PEER ADDRS        |      CLIENT ADDRS       |
+------------------+---------+-------+-------------------------+-------------------------+
|  c26d6ba798c079c | started | etcd3 | http://172.16.3.33:2380 | http://172.16.3.33:2379 |
| 4631df2115e1ef72 | started | etcd2 | http://172.16.3.32:2380 | http://172.16.3.32:2379 |
| a92fe5422902bc40 | started | etcd1 | http://172.16.3.31:2380 | http://172.16.3.31:2379 |
+------------------+---------+-------+-------------------------+-------------------------+
/ # etcdctl --endpoints=http://127.0.0.1:2379 put foo bar
OK
/ # etcdctl --endpoints=http://127.0.0.1:2379 get foo
foo
bar

#docker ps
[root@bogon docker]# docker ps
CONTAINER ID        IMAGE                        COMMAND                  CREATED             STATUS              PORTS                                              NAMES
5988c4443eb5        quay.io/coreos/etcd:v3.3.9   "etcd --name etcd3..."   37 seconds ago      Up 36 seconds       0.0.0.0:32379->2379/tcp, 0.0.0.0:32380->2380/tcp   etcd3
d4fdda6400cc        quay.io/coreos/etcd:v3.3.9   "etcd --name etcd2..."   44 seconds ago      Up 44 seconds       0.0.0.0:22379->2379/tcp, 0.0.0.0:22380->2380/tcp   etcd2
af86e5fd2ae5        quay.io/coreos/etcd:v3.3.9   "etcd --name etcd1..."   53 seconds ago      Up 52 seconds       0.0.0.0:2379-2380->2379-2380/tcp                   etcd1