install-kubelet.sh

.vuepress/public/install-script/install-kubelet.sh

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+#!/bin/bash
+
+# 在 master 节点和 worker 节点都要执行
+
+# 卸载旧版本
+yum remove -y docker \
+docker-client \
+docker-client-latest \
+docker-common \
+docker-latest \
+docker-latest-logrotate \
+docker-logrotate \
+docker-selinux \
+docker-engine-selinux \
+docker-engine
+
+# 设置 yum repository
+yum install -y yum-utils \
+device-mapper-persistent-data \
+lvm2
+yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
+
+# 安装并启动 docker
+yum install -y docker-ce-18.09.7 docker-ce-cli-18.09.7 containerd.io
+systemctl enable docker
+systemctl start docker
+
+# 安装 nfs-utils
+yum install -y nfs-utils
+
+# 关闭 防火墙
+systemctl stop firewalld
+systemctl disable firewalld
+
+# 关闭 SeLinux
+setenforce 0
+sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
+
+# 关闭 swap
+swapoff -a
+yes | cp /etc/fstab /etc/fstab_bak
+cat /etc/fstab_bak |grep -v swap > /etc/fstab
+
+# 修改 /etc/sysctl.conf
+# 如果有配置，则修改
+sed -i "s#^net.ipv4.ip_forward.*#net.ipv4.ip_forward=1#g"  /etc/sysctl.conf
+sed -i "s#^net.bridge.bridge-nf-call-ip6tables.*#net.bridge.bridge-nf-call-ip6tables=1#g"  /etc/sysctl.conf
+sed -i "s#^net.bridge.bridge-nf-call-iptables.*#net.bridge.bridge-nf-call-iptables=1#g"  /etc/sysctl.conf
+# 可能没有，追加
+echo "net.ipv4.ip_forward = 1" >> /etc/sysctl.conf
+echo "net.bridge.bridge-nf-call-ip6tables = 1" >> /etc/sysctl.conf
+echo "net.bridge.bridge-nf-call-iptables = 1" >> /etc/sysctl.conf
+# 执行命令以应用
+sysctl -p
+
+# 配置K8S的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kubelet、kubeadm、kubectl
+yum install -y kubelet-1.15.2 kubeadm-1.15.2 kubectl-1.15.2
+
+# 修改docker Cgroup Driver为systemd
+# # 将/usr/lib/systemd/system/docker.service文件中的这一行 ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
+# # 修改为 ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --exec-opt native.cgroupdriver=systemd
+# 如果不修改，在添加 worker 节点时可能会碰到如下错误
+# [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". 
+# Please follow the guide at https://kubernetes.io/docs/setup/cri/
+sed -i "s#^ExecStart=/usr/bin/dockerd.*#ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --exec-opt native.cgroupdriver=systemd#g" /usr/lib/systemd/system/docker.service
+
+# 设置 docker 镜像，提高 docker 镜像下载速度和稳定性
+# 如果您访问 https://hub.docker.io 速度非常稳定，亦可以跳过这个步骤
+curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://f1361db2.m.daocloud.io
+
+# 重启 docker，并启动 kubelet
+systemctl daemon-reload
+systemctl restart docker
+systemctl enable kubelet && systemctl start kubelet
+
+docker version