etcd查看key-value

get/set key-value

    etcdctl get/set /key-path

    etcdctl watch --recursive /test/sm/default/apps

查看所有key-value

    curl -s http://127.0.0.1:2479/v2/keys/?recursive=true

查看指定key-value
    curl -s http://127.0.0.1:2479/v2/keys/services/default/tenantmanager

etcdctl ls /

etcdctl rm /message