Kubernetes 安装

标签：云计算   Docker   

系统分层

就像Linux拥有内核（kernel）、核心系统类库、和可选的用户级工具，kubernetes也拥有功能和工具的层次。对于开发者来说，理解这些层次是非常重要的。kubernetes APIs、概念和功能都在下面的层级图中得到体现。

环境配置

增加节点DNS 别名

cat <<EOF >>/etc/hosts

192.168.209.160 k8a

192.168.209.172 k8b

192.168.209.173 k8c

EOF

验证下ping k8b && ping k8c

复制hosts到其他节点

scp /etc/hosts root@k8b:/etc/hosts

scp /etc/hosts root@k8c:/etc/hosts

添加kube-master到kube-node的秘钥认证

ssh-keygen

ssh-copy-id hostname

在k8a上验证下ssh key

ssh k8b

ssh k8c

关闭SELinux sed -i ‘s#SELINUX=enforcing#SELINUX=disabled#g‘ /etc/selinux/config setenforce 0

关闭系统防火墙

systemctl stop firewalld

systemctl disable firewalld

关闭sawp分区 swapoff -a vi /etc/fstab 注释掉swap分区 #/dev/mapper/cl-swap swap swap defaults 0 0

脚本

swapoff -a && sysctl -w vm.swappiness=0

添加配置内核参数/etc/sysctl.d/k8s.conf文件

cat > /etc/sysctl.d/k8s.conf <<EOF

net.bridge.bridge-nf-call-ip6tables = 1

net.bridge.bridge-nf-call-iptables = 1

net.ipv4.conf.all.forwarding = 1

vm.swappiness = 0

EOF

sysctl -p /etc/sysctl.d/k8s.conf

更新依赖库

yum install -y device-mapper-persistent-data lvm2 yum-utils

增加淘宝docker源

yum-config-manager --add-repo? http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

yum makecache fast

yum install -y docker-ce

启动docker

systemctl enable docker && systemctl start docker

增加淘宝k8s源

cat <<EOF > /etc/yum.repos.d/kubernetes.repo

[kubernetes]

name=Kubernetes

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

enabled=1

gpgcheck=1

repo_gpgcheck=1

gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg

EOF

安装k8s 组件

yum install -y kubeadm kubectl kubelet

master节点启动组件

systemctl enable kubelet && systemctl start kubelet

验证版本

kubeadm version

Kubernetes 安装

标签：云计算   Docker   

原文地址：http://blog.51cto.com/433266/2119874