• k8s集群搭建


    集群规划

    master     centos7      2U3G  30G     192.168.188.130
    node01     centos7      2U3G  30G     192.168.188.131
    node02     centos7      2U3G  30G     192.168.188.132
    

    备注:以下操作1-8在所有节点执行,9-10在master节点执行,11-12在node节点执行
    最后的测试在master节点执行

    1.关闭防火墙

    systemctl stop firewalld
    

    2.关闭selinux

    setenforce 0
    or
    vim /etc/selinux/config 将SELINUX=enforce改成SELINUX=disabled 保存,重启
    

    3.关闭swap

    swapoff -a  临时关闭
    or
    vim /etc/fstab  注释掉swap的那一行 永久关闭
    free 查看是否关闭
    

    4.添加主机名与ip对应关系

    vim /etc/hosts 添加如下内容
    192.168.188.130 k8s-master
    192.168.188.131 k8s-node01
    192.168.188.132 k8s-node02
    

    5.将桥接的IPV4流量传递到iptables 的链

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

    6.安装docker

    1)下载并安装
    $ wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O/etc/yum.repos.d/docker-ce.repo
    $ yum -y install docker-ce-18.06.1.ce-3.el7
    2)设置开机启动
    $ systemctl enable docker
    $ systemctl start docker
    3)查看docker版本
    $ docker --version
    Docker version 18.06.1-ce, build e68fc7a
    4)配置镜像加速器
    sudo mkdir -p /etc/docker
    sudo tee /etc/docker/daemon.json <<-'EOF'
    {
      "registry-mirrors": ["https://opmv8tfb.mirror.aliyuncs.com"]
    }
    EOF
    sudo systemctl daemon-reload
    sudo systemctl restart docker
    

    7.添加阿里云kubernetes YUM软件源

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

    8.安装kubeadm,kubelet和kubectl

    yum install kubelet-1.14.1-0.x86_64 --nogpgcheck
    yum install kubeadm-1.14.1-0.x86_64 --nogpgcheck
    yum install kubectl-1.14.1-0.x86_64 --nogpgcheck
    systemctl enable kubelet
    

    9.部署Kubernetes Master

    1)初始化kubeadm
    kubeadm init 
    --apiserver-advertise-address=192.168.188.130 
    --image-repository registry.aliyuncs.com/google_containers 
    --kubernetes-version v1.14.1 
    --service-cidr=10.1.0.0/16 
    --pod-network-cidr=10.244.0.0/16
    若出现如下结果表示初始化顺利
    

    kubeadm join 192.168.188.130:6443 --token q25g7a.g0l60io5eheqjdij 
        --discovery-token-ca-cert-hash sha256:168c90c4793d96fe60fe845db8958704632baecb72fd24de7150d1a5288a78a1
    2)使用kubectl工具
    复制如下命令直接执行
    mkdir -p $HOME/.kube
    sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
    sudo chown $(id -u):$(id -g) $HOME/.kube/config 
    下面就可以直接使用kubectl命令了
    

    10.安装Pod网络插件(CNI)

    kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/a70459be0084506e4ec919aa1c114638878db11b/Documentation/kube-flannel.yml
    

    2)查看是否部署成功
    kubectl get pods -n kube-system
    

    有镜像拉取失败,手动拉取镜像
    docker pull quay-mirror.qiniu.com/coreos/flannel:v0.11.0-amd64
    docker tag quay-mirror.qiniu.com/coreos/flannel:v0.11.0-amd64 quay.io/coreos/flannel:v0.11.0-amd64
    过几分钟用kubectl get pods -n kube-system命令查看是否重新部署成功
    

    3)再次查看node,可以看到状态为ready
    kubectl get node
    

    11.Node节点手动拉取镜像

    docker pull quay-mirror.qiniu.com/coreos/flannel:v0.11.0-amd64
    docker tag quay-mirror.qiniu.com/coreos/flannel:v0.11.0-amd64 quay.io/coreos/flannel:v0.11.0-amd64
    

    12.Node节点加入集群

    复制9.1的join命令将节点加入集群
    kubeadm join 192.168.188.130:6443 --token c0rjh9.6mvp2gg9dbmnimvc 
        --discovery-token-ca-cert-hash sha256:168c90c4793d96fe60fe845db8958704632baecb72fd24de7150d1a5288a78a1
    若加入成功显示如下
    

    13.测试kubernetes集群

    $ kubectl create deployment nginx --image=nginx
    $ kubectl expose deployment nginx --port=80 --type=NodePort
    $ kubectl get pod,svc
    

    kubectl get pod,svc -o wide
    

    通过浏览器访问:http://192.168.188.130:30372 可以正常访问
    


    本文作者:温茶又折花

    本文链接: https://www.cnblogs.com/dyfblogs/p/14961469.html

    转载文章请注明作者和出处,谢谢!
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  • 原文地址:https://www.cnblogs.com/dyfblogs/p/14961469.html
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