centos下docker和k8s实验环境搭建_error while initializing connection to kubernetes -优快云博客

本文链接：https://blog.youkuaiyun.com/springlustre/article/details/117819040

该文详细介绍了如何在CentOS系统上安装Docker，包括下载、解压、配置服务以及启动和设置开机启动。接着，文章展示了如何利用Minikube创建本地Kubernetes实验环境，包括配置源、安装kubectl、下载和启动Minikube。在遇到Kubernetes Dashboard启动失败的问题时，通过检查Pods状态、拉取镜像、重置网络规则等步骤成功解决问题。

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1、centos下安装docker

如果有centos服务器，则可以在linux下安装docker，具体操作如下：

（1）下载程序：wget https://download.docker.com/linux/static/stable/x86_64/docker-18.06.3-ce.tgz

（2）解压：tar -zxvf docker-18.06.3-ce.tgz

cp docker/* /usr/bin/

（3） touch /etc/systemd/system/docker.service

vi /etc/systemd/system/docker.service

[Unit]

Description=Docker Application Container Engine

Documentation=https://docs.docker.com

After=network-online.target firewalld.service

Wants=network-online.target

    

[Service]

Type=notify

# the default is not to use systemd for cgroups because the delegate issues still

# exists and systemd currently does not support the cgroup feature set required

# for containers run by docker

ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix://var/run/docker.sock

ExecReload=/bin/kill -s HUP $MAINPID

# Having non-zero Limit*s causes performance problems due to accounting overhead

# in the kernel. We recommend using cgroups to do container-local accounting.

LimitNOFILE=infinity

LimitNPROC=infinity

LimitCORE=infinity

# Uncomment TasksMax if your systemd version supports it.

# Only systemd 226 and above support this version.

#TasksMax=infinity

TimeoutStartSec=0

# set delegate yes so that systemd does not reset the cgroups of docker containers

Delegate=yes

# kill only the docker process, not all processes in the cgroup

KillMode=process

# restart the docker process if it exits prematurely

Restart=on-failure

StartLimitBurst=3

StartLimitInterval=60s

    

[Install]

WantedBy=multi-user.target

（4）授权并生效

chmod +x /etc/systemd/system/docker.service

systemctl daemon-reload

（5）启动

# 启动docker

systemctl start docker

# 设置开机启动

systemctl enable docker

# 查看docker状态

systemctl status docker

# 查看docker版本

docker -v

Docker version 18.06.3-ce, build d7080c1

2、使用Minikube创建本地Kubernetes实验环境

（1）配置源

echo '#k8s

[kubernetes]

name=Kubernetes

baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64

enabled=1

gpgcheck=0

'>/etc/yum.repos.d/kubernetes.repo

（2）安装kubectl：yum -y install kubelet kubeadm kubectl kubernetes-cni

（3）下载： curl -Lo minikube ht