Kubernetes多节点环境（Fedora Ansible）
昨天参照 https://github.com/GoogleCloudPlatform/kubernetes/blob/master/docs/getting-started-guides/fedora/fedora_ansible_config.md官方的说明老是碰到一个问题：$ sudo systemctl start kubelet
Failed to issue method call: Unit docker.socket failed to load: No such file or directory.
Kubernetes社区和Redhat bugzilla说明了是因为package的缘故，旧的依赖是docker.socket，需要更新为新的依赖docker.service （黑体部分）
$ cat /usr/lib/systemd/system/kubelet.service
Description=Kubernetes Kubelet Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=docker.service cadvisor.service
Requires=docker.service
EnvironmentFile=-/etc/kubernetes/config
EnvironmentFile=-/etc/kubernetes/kubelet
ExecStart=/usr/bin/kubelet \
${KUBE_LOGTOSTDERR} \
${KUBE_LOG_LEVEL} \
${KUBE_ETCD_SERVERS} \
${KUBELET_ADDRESS} \
${KUBELET_PORT} \
${KUBELET_HOSTNAME} \
${KUBE_ALLOW_PRIV} \
${KUBELET_ARGS}
Restart=on-failure
WantedBy=multi-user.target
实际上这样修改是无法直接work的，你会发现
ansible-playbook -i inventory setup.yml
还是错误，docker.socket的问题，查了半天实在无法理解，那里来的docker.socket
最后不得已，重启机器，发现再次执行没有问题了。好诡异的fedora系统！
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