使用Docker镜像部署etcd集群

使用Docker镜像部署etcd集群

参考：

官方参考

https://github.com/coreos/etcd/blob/master/Documentation/op-guide/container.md#docker

etcd使用

http://blog.csdn.net/u010424605/article/details/44592533

docker网络配置

http://www.infoq.com/cn/articles/docker-network-and-pipework-open-source-explanation-practice/

etcd版本，当前最新版v3.1.0

Docker启动脚本

启动三个容器，指定每个容器的IP

本样例是将三个容器放在同一台物理机上进行实验，实际应用中需要部署到各自不同的物理机上（可使用--net=host标记让容器使用宿主机网络）。

使用docker inspect命令查看物理机上docker0的网关，然后配置三个ip地址HOST_1~3

使用三个容器别名etcd1~3

# For each machine

ETCD_VERSION=v3.1.0

TOKEN=my-etcd-token

CLUSTER_STATE=new

NAME_1=etcd-node-0

NAME_2=etcd-node-1

NAME_3=etcd-node-2

HOST_1=172.17.0.2

HOST_2=172.17.0.3

HOST_3=172.17.0.4

CLUSTER=${NAME_1}=http://${HOST_1}:2380,${NAME_2}=http://${HOST_2}:2380,${NAME_3}=http://${HOST_3}:2380

# For node 1

THIS_NAME=${NAME_1}

THIS_IP=${HOST_1}

docker run -d --name etcd1 quay.io/coreos/etcd:${ETCD_VERSION}

    /usr/local/bin/etcd

    --data-dir=data.etcd --name ${THIS_NAME}

    --initial-advertise-peer-urls http://${THIS_IP}:2380 --listen-peer-urls http://${THIS_IP}:2380

    --advertise-client-urls http://${THIS_IP}:2379 --listen-client-urls http://${THIS_IP}:2379

    --initial-cluster ${CLUSTER}

    --initial-cluster-state ${CLUSTER_STATE} --initial-cluster-token ${TOKEN}

# For node 2

THIS_NAME=${NAME_2}

THIS_IP=${HOST_2}

docker run -d --name etcd2 quay.io/coreos/etcd:${ETCD_VERSION}

    /usr/local/bin/etcd

    --data-dir=data.etcd --name ${THIS_NAME}

    --initial-advertise-peer-urls http://${THIS_IP}:2380 --listen-peer-urls http://${THIS_IP}:2380

    --advertise-client-urls http://${THIS_IP}:2379 --listen-client-urls http://${THIS_IP}:2379

    --initial-cluster ${CLUSTER}

    --initial-cluster-state ${CLUSTER_STATE} --initial-cluster-token ${TOKEN}

# For node 3

THIS_NAME=${NAME_3}

THIS_IP=${HOST_3}

docker run -d --name etcd3 quay.io/coreos/etcd:${ETCD_VERSION}

    /usr/local/bin/etcd

    --data-dir=data.etcd --name ${THIS_NAME}

    --initial-advertise-peer-urls http://${THIS_IP}:2380 --listen-peer-urls http://${THIS_IP}:2380

    --advertise-client-urls http://${THIS_IP}:2379 --listen-client-urls http://${THIS_IP}:2379

    --initial-cluster ${CLUSTER}

    --initial-cluster-state ${CLUSTER_STATE} --initial-cluster-token ${TOKEN}

通过HTTP接口访问etcd接口

查看版本

curl -L http://172.17.0.2:2379/version

*设置一个key的value

curl http://172.17.0.2:2379/v2/keys/message -XPUT -d value="Hello world"

*获取一个key的value

curl http://172.17.0.2:2379/v2/keys/message