minikube的部署和安装，排错

minikube的部署和安装
安装minikube的步骤

环境准备： 虚拟机至少2个cpu核心，2G内存，磁盘20G
推荐使用2个cpu核心，4G的内存，100G的磁盘空间

前期：

[root@cali ~]# hostname minikube

1.Install kubectl

法一

#官方提供办法需要翻墙
#安装kubectl
https://kubernetes.io/docs/tasks/tools/install-kubectl/  --》官方文档

#官方提供的安装方法：如果虚拟机不能翻墙是不能执行的。
curl -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl

法二

#使用阿里源直接yum安装kubeadm，kubectl，kubelet

cat > /etc/yum.repos.d/kubernetes.repo << EOF
[kubernetes]
name=Kubernetes Repo
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
enable=1
EOF


#1.设置阿里的 kubeadm 源
vim /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes Repo
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
enable=1

#2.安装 kubeadm 等
yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes


#下载minikube的软件包
#1.下载
curl -Lo minikube http://kubernetes.oss-cn-hangzhou.aliyuncs.com/minikube/releases/v1.2.0/minikube-linux-amd64 && chmod +x minikube && sudo mv minikube /usr/local/bin/

[root@sc-k8s docker]# minikube version
minikube version: v1.2.0
[root@sc-k8s docker]# 

2.下载minikube的软件包

curl -Lo minikube http://kubernetes.oss-cn-hangzhou.aliyuncs.com/minikube/releases/v1.2.0/minikube-linux-amd64 && chmod +x minikube && sudo mv minikube /usr/local/bin/

3.关闭防火墙和selinux

关闭防火墙和selinux
[root@sc-k8s ~]# service firewalld stop
Redirecting to /bin/systemctl stop firewalld.service
[root@sc-k8s ~]# systemctl disable firewalld
Removed /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@sc-k8s ~]# setenforce 0
[root@sc-k8s ~]# vim /etc/selinux/config 
SELINUX=disabled
service firewalld stop
systemctl disable firewalld

4.安装docker并且启动docker

#1.下载 docker 的 yum 源
curl -o /etc/yum.repos.d/docker-ce.repo  https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
#2.安装 docker
yum install docker-ce -y
[root@sc-k8s ~]# docker version
Client: Docker Engine - Community
	Version:           20.10.5
	API version:       1.41
	Go version:        go1.13.15
	Git commit:        55c4c88
	Built:             Tue Mar  2 20:17:04 2021
	OS/Arch:           linux/amd64
	Context:           default
	Experimental:      true
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
[root@sc-k8s ~]# 
[root@sc-k8s ~]# service docker start
#3.启动docker服务和设置开机启动
Redirecting to /bin/systemctl start docker.service
[root@sc-k8s ~]# 
[root@sc-k8s docker]# systemctl enable docker
Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /usr/lib/systemd/system/docker.service.
[root@sc-k8s docker]#

5.关闭swap分区

swapoff -a
[root@minikube ~]# free -m
              total        used        free      shared  buff/cache   available
Mem:           3693         177        3045           8         470        3293
Swap:             0           0           0
[root@minikube ~]# 

6.配置 Docker 使用 cgroupfs 作为默认 Cgroup 驱动,k8s和docker的cgroup驱动必须要一致

[root@manager41 ~]# vim /usr/lib/systemd/system/docker.service
[root@sc-k8s docker]# vim /etc/docker/daemon.json
	{
	    "exec-opts": ["native.cgroupdriver=cgroupfs"]
	 }    
# ---》将原来的systemd修改为cgroupfs

[root@minikube ~]# systemctl daemon-reload
[root@minikube ~]# service docker restart

7.启动minikube

 minikube start --vm-driver="none"

8.查看节点，查看minikube状态，验证是否安装成功

[root@manager41 ~]# kubectl get node
NAME       STATUS   ROLES    AGE     VERSION
minikube   Ready    master   4m52s   v1.15.0
[root@manager41 ~]# 
#看到以上效果说明你的minikube已经安装成功

[root@manager41 ~]# minikube status   查看minikube的状态，显示running说明安装成功
host: Running
kubelet: Running
apiserver: Running
kubectl: Correctly Configured: pointing to minikube-vm at 192.168.0.27
[root@manager41 ~]#

出错排查
出错1：驱动问题
出错2：没有swap分区

#出错
This error is likely caused by:
	- The kubelet is not running
	- The kubelet is unhealthy due to a misconfiguration of the node in some way (required cgroups disabled)

If you are on a systemd-powered system, you can try to troubleshoot the error with the following commands:
	- 'systemctl status kubelet'
	- 'journalctl -xeu kubelet'

#使用命令查看：systemctl status kubelet
fail-swap-on=false --hostname-override=minikube -
#发现没有关闭swap分区，关掉后就成功