$ docker run -d -p 8080:8080 --restart always --name etcd-proxy $IMG \
    -proxy on -listen-client-urls http://0.0.0.0:8080 \
    -initial-cluster $CLUSTER
037c3c3dba04826a76c1d4506c922267885edbfa690e3de6188ac6b6380717ef
$ curl -L $HTTPIP:8080/v2/keys/mykey2 -XPUT -d value="t"
{"action":"set","node": {"key":"/mykey2","value":"t","modifiedIndex":12,"createdIndex":12}}
$ docker kill etcd1 etcd2
$ curl -L $HTTPIP:8080/v2/keys/mykey2
{"action":"get","node": {"key":"/mykey2","value":"t","modifiedIndex":12,"createdIndex":12}}
