ku安装及测试

1）修改内核参数和模块

cat <<EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF

#使内核参数配置生效

sysctl --system  &&  modprobe br_netfilter  && lsmod | grep br_netfilter

2）关闭交换内存

swapoff -a && sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab

3）配置国内阿里云docker源，安装docker

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

yum -y install docker-ce

systemctl start docker && systemctl enable docke

4）配置daemon.json，国内镜像加速，将容器数据默认更改为数据盘

{
        "registry-mirrors": [
                "https://hub-mirror.c.163.com",
                "https://mirror.baidubce.com",
                "https://registry.docker-cn.com",
                "https://docker.mirrors.ustc.edu.cn",
                "https://cr.console.aliyun.com",
                "https://mirror.ccs.tencentyun.com"

        ],
        "data-root": "/data/docker"
}

5）配置kubernetes yum源，用以安装Kubernetes基础服务及工具，此处使用阿里云镜像仓库源

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=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

6）安装Kubernetes基础服务及工具

yum -y install kubelet-1.13* kubeadm-1.13* kubectl-1.13*
systemctl start kubelet
systemctl enable kubelet.service

7）下载k8s相关镜像并打标签

for i in `kubeadm config images list`; do
  imageName=${i#k8s.gcr.io/}
  docker pull registry.aliyuncs.com/google_containers/$imageName
  docker tag registry.aliyuncs.com/google_containers/$imageName k8s.gcr.io/$imageName
  docker rmi registry.aliyuncs.com/google_containers/$imageName
done;

8）初始化k8s和网络

kubeadm init  --apiserver-advertise-address=192.168.83.165 --kubernetes-version=v1.13.12 --pod-network-cidr=10.100.0.0/16  --ignore-preflight-errors=all
#安装成功标志
#Your Kubernetes master has initialized successfully!
#开机启动 && 启动服务
systemctl enable kubelet && systemctl start kubelet

9）初始化kubectl配置

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
kubectl apply -f https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')

10）默认k8s的master节点是不能跑pod的业务，需要执行以下命令解除限制

kubectl taint nodes --all node-role.kubernetes.io/master-
#如果不允许调度
#kubectl taint nodes master1 node-role.kubernetes.io/master=:NoSchedule
#污点可选参数
      NoSchedule: 一定不能被调度
      PreferNoSchedule: 尽量不要调度
      NoExecute: 不仅不会调度, 还会驱逐Node上已有的Pod

11）查看主节点运行 Pod 的状态

kubectl get pods --all-namespaces -o wide

12）测试创建一个nginx

# 创建一个nginx服务
kubectl create deployment nginx  --image=nginx:1.14-alpine

#暴露端口

kubectl expose deploy nginx  --port=80 --target-port=80  --type=NodePort

13）验证查看服务

kubectl get pod,svc