安装k8s

准备环境

1. 设置主机名与时区

timedatectl set-timezone Asia/Shanghai
hostnamectl set-hostname master

2. 配置hosts文件

	vim /etc/hosts

3. 关闭防火墙

	sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
	setenforce 0
	systemctl disable firewalld
	systemctl stop firewalld

安装k8s

mkdir /usr/local/k8s-install && cd /usr/local/k8s-install
rz 上传 kubernetes-1.14.zip 包含以下的文件
   admin-role.yaml
   daemon.json
   docker-ce-18.09.tar.gz
   flannel-dashboard.tar.gz
   init.sh
   k8s-114-images.tar.gz
   k8s.conf
   kube-flannel.yml
   kube114-rpm.tar.gz
   kubernetes-dashboard-admin.rbac.yaml
   kubernetes-dashboard.yaml
   worker-node.sh
# 解压
unzip kubernetes-1.14.zip
# 安装docker
cd /usr/local/k8s-install/kubernetes-1.14
tar -zxvf docker-ce-18.09.tar.gz
cd docker
yum localinstall -y *.rpm
systemctl start docker
systemctl enable docker
# 正常的结果是cgroupfs
docker info | grep cgroup
 
 # 安装kubeadm
 # kubeadm是集群部署工具
 cd /usr/local/k8s-install/kubernetes-1.14
 tar -zxvf kube114-rpm.tar.gz
 cd kube114-rpm
 yum localinstall -y *.rpm

# 关闭交换区
swapoff -a
# swap一行注释
sed -i  '/swap/s/^/#/' /etc/fstab

# 配置网桥
cat <<EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
# 使配置生效
sysctl --system

# 安装k8s容器和仪表盘
cd /usr/local/k8s-install/kubernetes-1.14
docker load -i k8s-114-images.tar.gz
docker load -i flannel-dashboard.tar.gz

# 通过镜像安装k8s
cd /usr/local/k8s-install/kubernetes-1.14
docker load -i k8s-114-images.tar.gz
docker load -i flannel-dashboard.tar.gz
# 查看镜像
docker images
docker images | grep -v REPOSITORY | wc -l

配置k8s

# master主服务器配置
kubeadm init --kubernetes-version=v1.14.1 --pod-network-cidr=10.244.0.0/16
# 初始化
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
systemctl enable kubelet.service
# 查看节点
kubectl get nodes
#查看存在问题的pod
kubectl get pod --all-namespaces
#设置全局变量
#安装flannel网络组件 master
kubectl create -f kube-flannel.yml

# 加入NODE节点
kubeadm join 192.168.4.130:6443 --token 911xit.xkp2gfxbvf5wuqz7 \
   --discovery-token-ca-cert-hash sha256:23db3094dc9ae1335b25692717c40e24b1041975f6a43da9f43568f8d0dbac72
   
#如果忘记
#在master 上执行kubeadm token list 查看 ，在node上运行加入
kubeadm join 192.168.163.132:6443 --token aoeout.9k0ybvrfy09q1jf6 --discovery-token-unsafe-skip-ca-verification

• kubeadm 是kubernetes集群快速构建工具
• kubelet 运行在所有节点上，负责启动POD和容器，以系统服务形式出现
• kubectl 是 kubernetes命令行工具，提供指令

master开启仪表盘

kubectl apply -f kubernetes-dashboard.yaml
kubectl apply -f admin-role.yaml
kubectl apply -f kubernetes-dashboard-admin.rbac.yaml
kubectl -n kube-system get svc
#http://192.168.163.132:32000 访问