问题一：
# yum install -y etcd kubernetes Error: docker-ce-cli conflicts with 2:docker-1.13.1-94.gitb2f74b2.el7.centos.x86_64 Error: docker-ce conflicts with 2:docker-1.13.1-94.gitb2f74b2.el7.centos.x86_64
原因：
安装kubernetes之前已经安装了docker
解决方法：卸载docker服务
卸载docker：yum remove -y 'rpm -qa |grep docker'
删除容器镜像：rm -rf /var/lib/docker
再次安装kubernetes，安装成功，而且会自动安装docker
问题二：
2.1
# etcdctl mk /atomic.io/network/config '{"Network":"192.168.3.4/16"}' Error: client: etcd cluster is unavailable or misconfigured; error #0: dial tcp 127.0.0.1:2379: connect: connection refused; error #1: dial tcp 127.0.0.1:4001: connect: connection refused error #0: dial tcp 127.0.0.1:2379: connect: connection refused error #1: dial tcp 127.0.0.1:4001: connect: connection refused
原因：
如果出现如上的错误，是因为ETCD_LISTEN_CLIENT_URLS参数没有配置http://127.0.0.1:2379而导致的
解决方法：
将 # /etc/etcd/etcd.conf 中的ETCD_LISTEN_CLIENT_URLS参数改为:
ETCD_LISTEN_CLIENT_URLS="http://127.0.0.1:2379"
2.2
# etcdctl mk /atomic.io/network/config '{"Network":"192.168.3.4/16"}' Error: dial tcp 192.168.3.4:2379: connect: connection refused
原因：
ETCD_LISTEN_CLIENT_URLS参数没有配置本地ip “http://192.168.3.4:2379” 而导致的
解决方法：
将 # /etc/etcd/etcd.conf 中的ETCD_LISTEN_CLIENT_URLS参数改为:
ETCD_LISTEN_CLIENT_URLS="http://192.168.37.49:2379,http://127.0.0.1:2379"
问题三：启动docker服务失败
# systemctl status docker ● docker.service - Docker Application Container Engine Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled) Drop-In: /usr/lib/systemd/system/docker.service.d └─flannel.conf Active: failed (Result: exit-code) since Tue 2019-06-25 11:16:41 CST; 4min 15s ago Docs: http://docs.docker.com Process: 20982 ExecStart=/usr/bin/dockerd-current --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current --default-runtime=docker-runc --exec-opt native.cgroupdriver=systemd --userland-proxy-path=/usr/libexec/docker/docker-proxy-current --init-path=/usr/libexec/docker/docker-init-current --seccomp-profile=/etc/docker/seccomp.json $OPTIONS $DOCKER_STORAGE_OPTIONS $DOCKER_NETWORK_OPTIONS $ADD_REGISTRY $BLOCK_REGISTRY $INSECURE_REGISTRY $REGISTRIES (code=exited, status=1/FAILURE) Main PID: 20982 (code=exited, status=1/FAILURE) Jun 25 11:16:41 localhost.localdomain systemd[1]: Starting Docker Application Container Engine... Jun 25 11:16:41 localhost.localdomain dockerd-current[20982]: unable to configure the Docker daemon with file /etc/docker/daemon.json: the following directives are specified both as a flag and in the configuration file:...rom file: 1500) Jun 25 11:16:41 localhost.localdomain systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE Jun 25 11:16:41 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine. Jun 25 11:16:41 localhost.localdomain systemd[1]: Unit docker.service entered failed state. Jun 25 11:16:41 localhost.localdomain systemd[1]: docker.service failed.
原因是：
安装kubernets之前安装过的docker残留文件影响了kubernets安装的docker启动
解决方法：
将/etc/docker/daemon.json删除，重新启动即可。
问题四：创建k8s管理mysql的pod时：
# kubectl create -f mysql.yaml error: error validating "mysql.yaml": error validating data: couldn't find type: v1beta1.Deployment; if you choose to ignore these errors, turn validation off with --validate=false
原因：
kubectl 的版本是1.5版本的
# kubectl version
Client Version: version.Info{Major:"1", Minor:"5", GitVersion:"v1.5.2", GitCommit:"269f928217957e7126dc87e6adfa82242bfe5b1e", GitTreeState:"clean", BuildDate:"2017-07-03T15:31:10Z", GoVersion:"go1.7.4", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"5", GitVersion:"v1.5.2", GitCommit:"269f928217957e7126dc87e6adfa82242bfe5b1e", GitTreeState:"clean", BuildDate:"2017-07-03T15:31:10Z", GoVersion:"go1.7.4", Compiler:"gc", Platform:"linux/amd64"}
解决方法：
将mysql.yaml脚本中的 “ apiVersion: apps/v1beta1 ” 改为 “apiVersion: extensions/v1beta1 ” 即可
不同的apiversion解释：
apps API组将是v1部署类型所在的位置 . apps/v1beta1 版本已在1.6.0中添加，因此如果您有1.5.x客户端或服务器，则仍应使用 extensions/v1beta1 版本 .
apps/v1beta1 和 extensions/v1beta1 部署类型相同，但在通过 apps API创建时，会使用一些改进的默认值