在安装Kubernetes集群那一步卡住报错，这台机器曾经手动安装过Dcoker，但是卸载了，不知道是不是没卸载干净，请问应该怎么处理
RUNNING HANDLER [etcd : wait for etcd up] ************************************************************
FAILED - RETRYING: wait for etcd up (10 retries left).
FAILED - RETRYING: wait for etcd up (9 retries left).
FAILED - RETRYING: wait for etcd up (8 retries left).
FAILED - RETRYING: wait for etcd up (7 retries left).
FAILED - RETRYING: wait for etcd up (6 retries left).