写在前面
因为我的节点都在国内，所以k8s的镜像无法在公网上顺利下载，而是下载的别人阿里云上的镜像，坐着不能保证镜像的安全性和官方性。
环境介绍
Docker版本
[root@k8s ~]# docker version Client: Version: 18.03.0-ce API version: 1.37 Go version: go1.9.4 Git commit: 0520e24 Built: Wed Mar 21 23:09:15 2018 OS/Arch: linux/amd64 Experimental: false Orchestrator: swarm Server: Engine: Version: 18.03.0-ce API version: 1.37 (minimum version 1.12) Go version: go1.9.4 Git commit: 0520e24 Built: Wed Mar 21 23:13:03 2018 OS/Arch: linux/amd64 Experimental: false
kubectl版本
[root@k8s ~]# kubectl version
Client Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.0", GitCommit:"fc32d2f3698e36b93322a3465f63a14e9f0eaead", GitTreeState:"clean", BuildDate:"2018-03-26T16:55:54Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.0", GitCommit:"fc32d2f3698e36b93322a3465f63a14e9f0eaead", GitTreeState:"clean", BuildDate:"2018-03-26T16:44:10Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"}
kubernetes版本
v1.10.0
安装过程
修改主机名并配置两台主机间的hosts通讯，这里不在阐述
hostnamectl set-hostname k8s hostnamectl set-hostname k8s1
停止防火墙并禁止开机启动
systemctl stop firewalld && systemctl disable firewalld
关闭selinux防火墙并设置开机关闭
sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/sysconfig/selinux
关闭swap分区，并设置开机不自动挂载
swapoff -a [root@k8s ~]# cat /etc/fstab # # /etc/fstab # Created by anaconda on Sat Jun 1 16:28:24 2019 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # /dev/mapper/centos-root / xfs defaults 0 0 UUID=e60e4d97-753a-4db1-a590-54ba91cd48db /boot xfs defaults 0 0 #/dev/mapper/centos-swap swap swap defaults 0 0
修改iptables转发规则
net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 net.ipv4.ip_forward = 1
使配置生效
modprobe br_netfilter sysctl -p /etc/sysctl.d/k8s.conf
安装docker依赖工具
sudo yum install -y yum-utils \ device-mapper-persistent-data \ lvm2
添加docker repo文件
sudo yum-config-manager \ --add-repo \ https://download.docker.com/linux/centos/docker-ce.repo
查看可以安装版本（可选）
yum list docker-ce --showduplicates | sort -r
安装Docker
sudo yum install docker-ce-18.03.0.ce-1.el7.centos
启动docker并设置开机启动
systemctl start docker && systemctl enable docker
以上步骤都要在master和node节点上运行
镜像下载
在master上执行下面命令，你也可以在写到一个shell脚本里面，直接运行shell脚本，因为下载镜像很容易搞晕。
docker pull cnych/kube-apiserver-amd64:v1.10.0 docker pull cnych/kube-scheduler-amd64:v1.10.0 docker pull cnych/kube-controller-manager-amd64:v1.10.0 docker pull cnych/kube-proxy-amd64:v1.10.0 docker pull cnych/k8s-dns-kube-dns-amd64:1.14.8 docker pull cnych/k8s-dns-dnsmasq-nanny-amd64:1.14.8 docker pull cnych/k8s-dns-sidecar-amd64:1.14.8 docker pull cnych/etcd-amd64:3.1.12 docker pull cnych/flannel:v0.10.0-amd64 docker pull cnych/pause-amd64:3.1 docker tag cnych/kube-apiserver-amd64:v1.10.0 k8s.gcr.io/kube-apiserver-amd64:v1.10.0 docker tag cnych/kube-scheduler-amd64:v1.10.0 k8s.gcr.io/kube-scheduler-amd64:v1.10.0 docker tag cnych/kube-controller-manager-amd64:v1.10.0 k8s.gcr.io/kube-controller-manager-amd64:v1.10.0 docker tag cnych/kube-proxy-amd64:v1.10.0 k8s.gcr.io/kube-proxy-amd64:v1.10.0 docker tag cnych/k8s-dns-kube-dns-amd64:1.14.8 k8s.gcr.io/k8s-dns-kube-dns-amd64:1.14.8 docker tag cnych/k8s-dns-dnsmasq-nanny-amd64:1.14.8 k8s.gcr.io/k8s-dns-dnsmasq-nanny-amd64:1.14.8 docker tag cnych/k8s-dns-sidecar-amd64:1.14.8 k8s.gcr.io/k8s-dns-sidecar-amd64:1.14.8 docker tag cnych/etcd-amd64:3.1.12 k8s.gcr.io/etcd-amd64:3.1.12 docker tag cnych/flannel:v0.10.0-amd64 quay.io/coreos/flannel:v0.10.0-amd64 docker tag cnych/pause-amd64:3.1 k8s.gcr.io/pause-amd64:3.1 docker rmi cnych/kube-apiserver-amd64:v1.10.0 docker rmi cnych/kube-scheduler-amd64:v1.10.0 docker rmi cnych/kube-controller-manager-amd64:v1.10.0 docker rmi cnych/kube-proxy-amd64:v1.10.0 docker rmi cnych/k8s-dns-kube-dns-amd64:1.14.8 docker rmi cnych/k8s-dns-dnsmasq-nanny-amd64:1.14.8 docker rmi cnych/k8s-dns-sidecar-amd64:1.14.8 docker rmi cnych/etcd-amd64:3.1.12 docker rmi cnych/flannel:v0.10.0-amd64 docker rmi cnych/pause-amd64:3.1
在node节点上执行下面命令，同理你也可以写到一个脚本里面
docker pull cnych/kube-proxy-amd64:v1.10.0 docker pull cnych/flannel:v0.10.0-amd64 docker pull cnych/pause-amd64:3.1 docker pull cnych/kubernetes-dashboard-amd64:v1.8.3 docker pull cnych/heapster-influxdb-amd64:v1.3.3 docker pull cnych/heapster-grafana-amd64:v4.4.3 docker pull cnych/heapster-amd64:v1.4.2 docker pull cnych/k8s-dns-kube-dns-amd64:1.14.8 docker pull cnych/k8s-dns-dnsmasq-nanny-amd64:1.14.8 docker pull cnych/k8s-dns-sidecar-amd64:1.14.8 docker tag cnych/flannel:v0.10.0-amd64 quay.io/coreos/flannel:v0.10.0-amd64 docker tag cnych/pause-amd64:3.1 k8s.gcr.io/pause-amd64:3.1 docker tag cnych/kube-proxy-amd64:v1.10.0 k8s.gcr.io/kube-proxy-amd64:v1.10.0 docker tag cnych/k8s-dns-kube-dns-amd64:1.14.8 k8s.gcr.io/k8s-dns-kube-dns-amd64:1.14.8 docker tag cnych/k8s-dns-dnsmasq-nanny-amd64:1.14.8 k8s.gcr.io/k8s-dns-dnsmasq-nanny-amd64:1.14.8 docker tag cnych/k8s-dns-sidecar-amd64:1.14.8 k8s.gcr.io/k8s-dns-sidecar-amd64:1.14.8 docker tag cnych/kubernetes-dashboard-amd64:v1.8.3 k8s.gcr.io/kubernetes-dashboard-amd64:v1.8.3 docker tag cnych/heapster-influxdb-amd64:v1.3.3 k8s.gcr.io/heapster-influxdb-amd64:v1.3.3 docker tag cnych/heapster-grafana-amd64:v4.4.3 k8s.gcr.io/heapster-grafana-amd64:v4.4.3 docker tag cnych/heapster-amd64:v1.4.2 k8s.gcr.io/heapster-amd64:v1.4.2 docker rmi cnych/kube-proxy-amd64:v1.10.0 docker rmi cnych/flannel:v0.10.0-amd64 docker rmi cnych/pause-amd64:3.1 docker rmi cnych/kubernetes-dashboard-amd64:v1.8.3 docker rmi cnych/heapster-influxdb-amd64:v1.3.3 docker rmi cnych/heapster-grafana-amd64:v4.4.3 docker rmi cnych/heapster-amd64:v1.4.2 docker rmi cnych/k8s-dns-kube-dns-amd64:1.14.8 docker rmi cnych/k8s-dns-dnsmasq-nanny-amd64:1.14.8 docker rmi cnych/k8s-dns-sidecar-amd64:1.14.8
master和node节点都需要执行
安装kubelet、kubeadm、kubectl、kubernetes-cni
添加yum源
cat <<EOF > /etc/yum.repos.d/kubernetes.repo [kubernetes] name=Kubernetes baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=0 repo_gpgcheck=0 gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg EOF
安装
yum makecache fast && yum install -y kubelet-1.10.0-0 yum install -y kubeadm-1.10.0-0 kubectl-1.10.0-0 kubernetes-cni-0.6.0-0.x86_64.rpm
查看docker驱动
docker info |grep Cgroup Cgroup Driver: cgroupfs
注：kubectl默认使用的驱动是cgroupfs的，但是使用yum安装的，yum给改成了system了。所以我们需要手动更改kubectl驱动。
修改kubectl驱动
vi /etc/systemd/system/kubelet.service.d/10-kubeadm.conf # 把这个文件中的 Environment="KUBELET_CGROUP_ARGS=--cgroup-driver=systemed" 替换成 Environment="KUBELET_CGROUP_ARGS=--cgroup-driver=cgroupfs"
重新加载kubectl daemon
systemctl daemon-reload
下面命令需要在master上执行
kubeadm init --kubernetes-version=v1.10.0 --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=192.168.1.127
解释：
--kubernetes-version k8s版本 --pod-network-cidr 产生的pod之间的网络段 --apiserver-advertise-address master节点地址 特别注意：如果初始化k8s集群成功，最后会显示一行命令，如下：一定要保存住，无法复现。 # 这条命令是其它node节点加入k8s集群的命令。 kubeadm join 192.168.1.127:6443 --token g8lrmt.1nhjcjqsk3a7l096 --discovery-token-ca-cert-hash sha256:0227ac613398b48b0d1949941c9f138b0444270cdd84ec9ef75e708ac14ca1cf
根据提示修改kubectl的配置
mkdir -p $HOME/.kube. sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config
在node上执行加入k8s命令
kubeadm join 192.168.1.127:6443 --token g8lrmt.1nhjcjqsk3a7l096 --discovery-token-ca-cert-hash sha256:0227ac613398b48b0d1949941c9f138b0444270cdd84ec9ef75e708ac14ca1cf
在master上查看集群状态
# 此时输出的node节点可能显示为notread状态，没关系我们把pod通讯的网络插件安装上就行了。 kubectl get node
master安装flannel插件
wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml kubectl apply -f kube-flannel.yml
查看pod的启动状态
kubectl get pods --all-namespaces [root@k8s ~]# kubectl get pods --all-namespaces NAMESPACE NAME READY STATUS RESTARTS AGE kube-system etcd-k8s 1/1 Running 0 4m kube-system kube-apiserver-k8s 1/1 Running 0 4m kube-system kube-controller-manager-k8s 1/1 Running 0 4m kube-system kube-dns-86f4d74b45-nj7p8 3/3 Running 0 5m kube-system kube-flannel-ds-amd64-7tpmz 1/1 Running 0 2m kube-system kube-proxy-r6bgh 1/1 Running 0 5m kube-system kube-scheduler-k8s 1/1 Running 0 4m
至此k8s集群安装完毕！！！！
安装dashboard UI管理工具
下载yaml文件
wget https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml
安装过程见：https://www.cnblogs.com/harlanzhang/p/10045975.html