安装Minikube

在容器编排工具中安装配置最复杂的就是Kubernetes，想要运行一个简单的容器集群环境，对于没有使用过Kubernetes的人来说，需要花费一定的时间去理解各组件的概念和功能，再做大量的安装配置工作才能运行一个kubernetes集群。

从Kubernetes 1.3开始提供了一个叫Minikube的强大测试工具，可以在任意主机上运行单节点的小型集群，这个工具默认安装和配置了一个Linux VM，Docker和Kubernetes的相关组件，并且提供Dashboard。目前支持在Linux, OS X及Windows上安装，今天我们介绍的是在OS X上如何安装Minitube。

Minitube项目地址：https://github.com/kubernetes/minikube

Kubectl安装

如果可以访问外网：

curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl && chmod +x kubectl && sudo mv kubectl /usr/local/bin/

或者指定版本：

curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.11.2/bin/linux/amd64/kubectl && chmod +x kubectl && sudo mv kubectl /usr/local/bin/

更好的方法是指定yum源:

国外：

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF
yum install -y kubectl

国内阿里：

cat >> /etc/yum.repos.d/kubernetes.repo <<EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=0
EOF

查看kubectl版本：

[root@localhost /]# kubectl version
Client Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.2", GitCommit:"bb9ffb1654d4a729bb4cec18ff088eacc153c239", GitTreeState:"clean", BuildDate:"2018-08-07T23:17:28Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"linux/amd64"}
The connection to the server localhost:8080 was refused - did you specify the right host or port?

minikube安装

[hongdada@localhost /]$ sudo curl -Lo minikube http://kubernetes.oss-cn-hangzhou.aliyuncs.com/minikube/releases/v0.24.1/minikube-linux-amd64 && chattr -ai minikube && chmod +x minikube && sudo mv minikube /usr/local/bin/
[hongdada@localhost bin]$ minikube version
minikube version: v0.24.1

好吧，用hongdada账户操作遇到的权限问题太多，我下面切换到root账户

启动

默认启动使用的是 VirtualBox 驱动，使用 --vm-driver 参数可以指定其它驱动。

minikube start --registry-mirror=https://registry.docker-cn.com  --vm-driver=none

安装中遇到的问题：

错误信息：

    [ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables contents are not set to 1
[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`
: running command: sudo docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/k8s-dns-kube-dns-amd64:1.14.8 && sudo docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/k8s-dns-kube-dns-amd64:1.14.8 k8s.gcr.io/k8s-dns-kube-dns-amd64:1.14.8 && sudo docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1 && sudo docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1 k8s.gcr.io/pause-amd64:3.1 && sudo docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/k8s-dns-dnsmasq-nanny-amd64:1.14.8 && sudo docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/k8s-dns-dnsmasq-nanny-amd64:1.14.8 k8s.gcr.io/k8s-dns-dnsmasq-nanny-amd64:1.14.8 && sudo docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/k8s-dns-sidecar-amd64:1.14.8 && sudo docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/k8s-dns-sidecar-amd64:1.14.8 k8s.gcr.io/k8s-dns-sidecar-amd64:1.14.8 && 
sudo /usr/bin/kubeadm init --config /var/lib/kubeadm.yaml --ignore-preflight-errors=DirAvailable--etc-kubernetes-manifests --ignore-preflight-errors=DirAvailable--data-minikube --ignore-preflight-errors=Port-10250 --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-kube-scheduler.yaml --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-kube-apiserver.yaml --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-kube-controller-manager.yaml --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-etcd.yaml --ignore-preflight-errors=Swap --ignore-preflight-errors=CRI  &&
sudo /usr/bin/kubeadm alpha phase addon kube-dns

解决方法：

https://blog.csdn.net/xypds2010/article/details/52212323

在CentOS中
vim /etc/sysctl.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-arptables = 1

重启。

启动：

Unfortunately, an error has occurred:
    timed out waiting for the condition

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)
    - Either there is no internet connection, or imagePullPolicy is set to "Never",
      so the kubelet cannot pull or find the following control plane images:
        - registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver-amd64:v1.10.0
        - registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager-amd64:v1.10.0
        - registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler-amd64:v1.10.0
        - registry.cn-hangzhou.aliyuncs.com/google_containers/etcd-amd64:3.1.12 (only if no external etcd endpoints are configured)

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'
couldn't initialize a Kubernetes cluster
: running command: sudo docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/k8s-dns-kube-dns-amd64:1.14.8 && sudo docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/k8s-dns-kube-dns-amd64:1.14.8 k8s.gcr.io/k8s-dns-kube-dns-amd64:1.14.8 && sudo docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1 && sudo docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause-amd64:3.1 k8s.gcr.io/pause-amd64:3.1 && sudo docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/k8s-dns-dnsmasq-nanny-amd64:1.14.8 && sudo docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/k8s-dns-dnsmasq-nanny-amd64:1.14.8 k8s.gcr.io/k8s-dns-dnsmasq-nanny-amd64:1.14.8 && sudo docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/k8s-dns-sidecar-amd64:1.14.8 && sudo docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/k8s-dns-sidecar-amd64:1.14.8 k8s.gcr.io/k8s-dns-sidecar-amd64:1.14.8 && 
sudo /usr/bin/kubeadm init --config /var/lib/kubeadm.yaml --ignore-preflight-errors=DirAvailable--etc-kubernetes-manifests --ignore-preflight-errors=DirAvailable--data-minikube --ignore-preflight-errors=Port-10250 --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-kube-scheduler.yaml --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-kube-apiserver.yaml --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-kube-controller-manager.yaml --ignore-preflight-errors=FileAvailable--etc-kubernetes-manifests-etcd.yaml --ignore-preflight-errors=Swap --ignore-preflight-errors=CRI  &&
sudo /usr/bin/kubeadm alpha phase addon kube-dns 

还是有问题，明显是docker镜像没有拉下来

解决方法：

好吧，我还是搞定不了，妈蛋的，一堆坑。

使用kubectl低版本1.5.2，可以安装，但是dashboard还是有问题，估计都是镜像拉取问题。

操作：

[root@localhost hongdada]# minikube status
minikube: Running
cluster: Running
kubectl: Correctly Configured: pointing to minikube-vm at 18.16.202.33
[root@localhost hongdada]# minikube dashboard
Could not find finalized endpoint being pointed to by kubernetes-dashboard: Error validating service: Error getting service kubernetes-dashboard: services "kubernetes-dashboard" not found

结果只实现了部分，应该是没有虚拟机的原因。

参考：
https://ehlxr.me/2018/01/12/kubernetes-minikube-installation/
https://www.hi-linux.com/posts/14955.html
https://yq.aliyun.com/articles/221687
https://blog.csdn.net/huwh_/article/details/81506240
https://kubernetes.io/docs/tasks/tools/install-kubectl/#install-kubectl
http://www.mdslq.cn/archives/5e6f338.html
https://zxc0328.github.io/2017/10/26/k8s-setup-1-7/
https://gitee.com/Rachird/kubernetes