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install-kubernetes.md

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kubernetes installation

License GitHub stars

一、kubernetes link

https://www.kubernetes.org.cn/course/install

Prerequisites for the target host（演示环境安装)

  • host 192.168.56.60 和 192.168.56.61 机器上执行

1、关掉 selinux

$ setenforce 0

$ sed -i "s/^SELINUX=enforcing/SELINUX=disabled/g" /etc/sysconfig/selinux

2、关掉防火墙

$ systemctl stop firewalld

$ systemctl disable firewalld

3、关闭 swap

$ swapoff -a

$ sed -i 's/.*swap.*/#&/' /etc/fstab

4、配置转发参数

$ vi /etc/sysctl.d/k8s.conf

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

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

$ sysctl --system

5、安装一些必备的工具

$ yum install -y epel-release

$ yum install -y net-tools wget vim ntpdate

6、设置国内 yum 源

$ vi /etc/yum.repos.d/kubernetes.repo

[kubernetes]

name=Kubernetes

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

gpgcheck=0

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

enabled=1

7、yum makecache fast

8、修改主机名称和hosts

(1)、 修改192.168.56.60 机器:hostnamectl set-hostname k8s-60

(2)、修改192.168.56.61 机器: hostnamectl set-hostname k8s-61

(3)、修改192.168.56.60和192.168.56.61 vi /etc/hosts

192.168.56.60 k8s-60

192.168.56.61 k8s-61

二、安装命令组件k8s

1、查看可安装的版本

yum list kubelet --showduplicates | sort -r

2、安装kubeadm、kubectl、kubelet

$ yum install -y kubelet-1.12.1 kubeadm-1.12.1 kubectl-1.12.1 kubernetes-cni-0.6.0

$ systemctl enable kubelet && systemctl start kubelet

3、拉取k8s需要的镜像

docker pull mirrorgooglecontainers/kube-apiserver:v1.12.1

docker pull mirrorgooglecontainers/kube-controller-manager:v1.12.1

docker pull mirrorgooglecontainers/kube-scheduler:v1.12.1

docker pull mirrorgooglecontainers/kube-proxy:v1.12.1

docker pull mirrorgooglecontainers/etcd-amd64:3.2.24

docker pull mirrorgooglecontainers/pause-amd64:3.1

docker pull mirrorgooglecontainers/etcd:3.2.24

docker pull mirrorgooglecontainers/pause:3.1

docker pull coredns/coredns:1.2.2

docker pull registry.cn-shanghai.aliyuncs.com/gcr-k8s/flannel:v0.10.0-amd64

4、修改k8s需要的镜像名称

docker tag mirrorgooglecontainers/kube-apiserver:v1.12.1 k8s.gcr.io/kube-apiserver:v1.12.1

docker tag mirrorgooglecontainers/kube-controller-manager:v1.12.1 k8s.gcr.io/kube-controller-manager:v1.12.1

docker tag mirrorgooglecontainers/kube-scheduler:v1.12.1 k8s.gcr.io/kube-scheduler:v1.12.1

docker tag mirrorgooglecontainers/kube-proxy:v1.12.1 k8s.gcr.io/kube-proxy:v1.12.1

docker tag mirrorgooglecontainers/etcd-amd64:3.2.24 k8s.gcr.io/etcd-amd64:3.2.24

docker tag mirrorgooglecontainers/pause-amd64:3.1 k8s.gcr.io/pause-amd64:3.1

docker tag mirrorgooglecontainers/etcd:3.2.24 k8s.gcr.io/etcd:3.2.24

docker tag mirrorgooglecontainers/pause:3.1 k8s.gcr.io/pause:3.1

docker tag coredns/coredns:1.2.2 k8s.gcr.io/coredns:1.2.2

docker tag registry.cn-shanghai.aliyuncs.com/gcr-k8s/flannel:v0.10.0-amd64 quay.io/coreos/flannel:v0.10.0-amd64

5、删除镜像

docker rmi mirrorgooglecontainers/kube-apiserver:v1.12.1

docker rmi mirrorgooglecontainers/kube-controller-manager:v1.12.1

docker rmi mirrorgooglecontainers/kube-scheduler:v1.12.1

docker rmi mirrorgooglecontainers/kube-proxy:v1.12.1

docker rmi mirrorgooglecontainers/etcd-amd64:3.2.24

docker rmi mirrorgooglecontainers/pause-amd64:3.1

docker rmi mirrorgooglecontainers/etcd:3.2.24

docker rmi mirrorgooglecontainers/pause:3.1

docker rmi coredns/coredns:1.2.2

docker rmi registry.cn-shanghai.aliyuncs.com/gcr-k8s/flannel:v0.10.0-amd64

6、查看镜像结果

docker images | grep k8s

01

在192.168.56.60机器上执行`

7、开始安装k8s

kubeadm init --kubernetes-version=v1.12.1 --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=192.168.56.60

02

执行屏幕打印出的命令

mkdir -p $HOME/.kube

sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config

sudo chown $(id -u):$(id -g) $HOME/.kube/config

8、创建 flannel 网络

(1) sysctl net.bridge.bridge-nf-call-iptables=1

(2) wget wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

(3) flannel 默认会使用主机的第一张网卡，如果你有多张网卡，需要通过配置单独指定。修改 kube-flannel.yml 中的以下部分

03

04

05

(4) 安装网络

** 手工先下载

docker pull quay.io/coreos/flannel:v0.10.0-amd64

如果很慢可以下载

docker pull registry.cn-shenzhen.aliyuncs.com/cp_m/flannel:v0.10.0-amd64

docker tag registry.cn-shenzhen.aliyuncs.com/cp_m/flannel:v0.10.0-amd64 quay.io/coreos/flannel:v0.10.0-amd64

** 创建网络 kubectl apply -f kube-flannel.yml

06

在192.168.56.61机器上执行

9、192.168.56.61加入集群 (1)、同样的类似192.168.56.60下载镜像

    3、拉取k8s需要的镜像

    4、修改k8s需要的镜像名称

    5、删除镜像

(2)、使用刚才在192.168.56.60创建master控制台提示加入集群命令

kubeadm join 192.168.56.60:6443 --token cgggwd.q5w883rkzbp44v6w --discovery-token-ca-cert-hash sha256:cae67bec80da916c8e140f4e66f2ce3aff2f8be3a8580f757cdfdfd1651337ba

(3)、在192.168.56.60上验证

07