kubeadm安装Kubernetes13.1集群-三

环境:

  master: 192.168.3.100
  node01: 192.168.3.101
  node02: 192.168.3.102

  关闭所有主机防火墙,selinux;
  配置主机互信;

master:
  1、设置docker和kubernetes的repo文件(阿里):
    cd /etc/yum.repos.d/

    wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

    vim kubernetes.repo
    [kubernetes]
    name=Kubernetes Repo
    baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
    gpgcheck=1
    gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
    enabled=1

    yum repolist #验证repo

    scp docker-ce.repo kubernetes.repo node01:/etc/yum.repos.d/
    scp docker-ce.repo kubernetes.repo node02:/etc/yum.repos.d/

  2、安装docker、kubelet、kubeadm、kubectl

    [root@master ~]# yum install epel-release -y
    [root@master ~]# cd
    [root@master ~]# wget https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
    [root@master ~]# rpm --import yum-key.gpg
    [root@master ~]# wget https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
    [root@master ~]# rpm --import rpm-package-key.gpg

    [root@master ~]# yum install docker-ce kubelet kubeadm kubectl

  3、启动 

    (1)
      [root@master ~]# echo "1" >/proc/sys/net/bridge/bridge-nf-call-ip6tables
      [root@master ~]# echo "1" >/proc/sys/net/bridge/bridge-nf-call-iptables

      创建/etc/sysctl.d/k8s.conf文件,添加如下内容:
        net.bridge.bridge-nf-call-ip6tables = 1
        net.bridge.bridge-nf-call-iptables = 1
        net.ipv4.ip_forward = 1


      执行命令使修改生效:
        modprobe br_netfilter
        sysctl -p /etc/sysctl.d/k8s.conf

        [root@master ~]# systemctl daemon-reload
        [root@master ~]# systemctl restart docker

    (2)
      IPvs:(我没有使用ipvs, 所以没有做这一步)
      kube-proxy开启ipvs的前置条件:
      在所有的Kubelet存在的节点执行以下脚本:
      cat > /etc/sysconfig/modules/ipvs.modules <<EOF
      #!/bin/bash
      modprobe -- ip_vs
      modprobe -- ip_vs_rr
      modprobe -- ip_vs_wrr
      modprobe -- ip_vs_sh
      modprobe -- nf_conntrack_ipv4
      EOF
      chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4

      上面脚本创建了的/etc/sysconfig/modules/ipvs.modules文件,保证在节点重启后能自动加载所需模块。
      使用lsmod | grep -e ip_vs -e nf_conntrack_ipv4命令查看是否已经正确加载所需的内核模块。
      接下来还需要确保各个节点上已经安装了ipset软件包: yum install ipset

       为了便于查看ipvs的代理规则,最好安装一下管理工具ipvsadm :  yum install ipvsadm。
      如果以上前提条件如果不满足,则即使kube-proxy的配置开启了ipvs模式,也会退回到iptables模式。

      在kubelet的配置文件/etc/sysconfig/kubelet,设置使用ipvs:
      KUBE_PROXY_MODE=ipvs

    (3)准备镜像  

      [root@master ~]# rpm -ql kubelet
      /etc/kubernetes/manifests
      /etc/sysconfig/kubelet
      /etc/systemd/system/kubelet.service
      /usr/bin/kubelet

      [root@master ~]# systemctl enable kubelet   #kubelet先设置开机启动,但是先不启动
      [root@master ~]# systemctl enable docker

      [root@master ~]# kubeadm init --help


      [root@master ~]# kubeadm version   #查看kubeadm的版本
      [root@master ~]# kubeadm config images list    #查看kubeadm需要的image版本,然后下载对应的镜像
      

      由于国内不能访问Google,所以只能下载国内站点上的镜像,然后重新打标:

      docker pull mirrorgooglecontainers/kube-apiserver:v1.13.1
      docker pull mirrorgooglecontainers/kube-controller-manager:v1.13.1
      docker pull mirrorgooglecontainers/kube-scheduler:v1.13.1
      docker pull mirrorgooglecontainers/kube-proxy:v1.13.1
      docker pull mirrorgooglecontainers/pause:3.1
      docker pull mirrorgooglecontainers/etcd:3.2.24
      docker pull coredns/coredns:1.2.6
      docker pull registry.cn-shenzhen.aliyuncs.com/cp_m/flannel:v0.10.0-amd64

      为了应对网络不畅通的问题,我们国内网络环境只能提前手动下载相关镜像并重新打 tag :
      docker tag mirrorgooglecontainers/kube-apiserver:v1.13.1 k8s.gcr.io/kube-apiserver:v1.13.1
      docker tag mirrorgooglecontainers/kube-controller-manager:v1.13.1 k8s.gcr.io/kube-controller-manager:v1.13.1
      docker tag mirrorgooglecontainers/kube-scheduler:v1.13.1 k8s.gcr.io/kube-scheduler:v1.13.1
      docker tag mirrorgooglecontainers/kube-proxy:v1.13.1 k8s.gcr.io/kube-proxy:v1.13.1
      docker tag mirrorgooglecontainers/pause:3.1 k8s.gcr.io/pause:3.1
      docker tag mirrorgooglecontainers/etcd:3.2.24 k8s.gcr.io/etcd:3.2.24
      docker tag coredns/coredns:1.2.6 k8s.gcr.io/coredns:1.2.6
      docker tag registry.cn-shenzhen.aliyuncs.com/cp_m/flannel:v0.10.0-amd64 quay.io/coreos/flannel:v0.10.0-amd64

      docker rmi mirrorgooglecontainers/kube-apiserver:v1.13.1
      docker rmi mirrorgooglecontainers/kube-controller-manager:v1.13.1
      docker rmi mirrorgooglecontainers/kube-scheduler:v1.13.1
      docker rmi mirrorgooglecontainers/kube-proxy:v1.13.1
      docker rmi mirrorgooglecontainers/pause:3.1
      docker rmi mirrorgooglecontainers/etcd:3.2.24
      docker rmi coredns/coredns:1.2.6
      docker rmi registry.cn-shenzhen.aliyuncs.com/cp_m/flannel:v0.10.0-amd64   

    (4)
      [root@master ~]# vim /etc/sysconfig/kubelet    #设置忽略Swap启动的状态错误
      KUBELET_EXTRA_ARGS="--fail-swap-on=false"

      初始化集群:
      [root@master ~]# kubeadm init --kubernetes-version=v1.13.1 --pod-network-cidr=10.244.0.0/16 --service-cidr=10.96.0.0/12 --ignore-preflight-errors=Swap

      要开始使用集群,需要以常规用户身份运行以下命令:
      mkdir -p $HOME/.kube
      sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
      sudo chown $(id -u):$(id -g) $HOME/.kube/config     #root用户的话,这条命令就不用执行了

      可以通过在每个节点上运行以下命令加入集群,但是现在不用添加:

sha256:3a5c7da23306cf1e869fec140e4d187056edf146affe5c6ee8007cc2de6b349b  #初始化集群会生成

  

  4、kubectl命令
    [root@master ~]# kubectl get cs    #检查各组件健康状况
    [root@master ~]# kubectl get nodes    #查看节点
    [root@master ~]# kubectl get ns   #查看所有名称空间
    [root@master ~]# kubectl describe node node01    #查看一个节点的详细信息
    [root@master ~]# kubectl cluster-info    #查看集群信息


  5、部署flannel
    [root@master ~]# kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
    [root@master ~]# kubectl get pods -n kube-system   #查看当前节点所有pod状态,-n:指定namespace

 

 

node01:       

  1、
    [root@master ~]# scp rpm-package-key.gpg node01:/root/

  2、
    [root@node01 ~]# yum install docker-ce kubelet kubeadm
    [root@master ~]# scp /usr/lib/systemd/system/docker.service node01:/usr/lib/systemd/system/docker.service
    [root@master ~]# scp /etc/sysconfig/kubelet node01:/etc/sysconfig/
    [root@node01 ~]# systemctl daemon-reload
    [root@node01 ~]# systemctl start docker
    [root@node01 ~]# systemctl enable docker
    [root@node01 ~]# systemctl enable kubelet
    [root@node01 ~]# echo "1" >/proc/sys/net/bridge/bridge-nf-call-ip6tables
    [root@node01 ~]# echo "1" >/proc/sys/net/bridge/bridge-nf-call-iptables

  3、
    [root@master ~]# scp myimages.gz node01:/root/    #将master的镜像打包copy到node01
    [root@node01 ~]# docker load -i myimages.gz
    [root@node01 ~]# docker tag fdb321fd30a0 k8s.gcr.io/kube-proxy:v1.13.1
    [root@node01 ~]# docker tag 40a63db91ef8 k8s.gcr.io/kube-apiserver:v1.13.1
    [root@node01 ~]# docker tag ab81d7360408 k8s.gcr.io/kube-scheduler:v1.13.1
    [root@node01 ~]# docker tag 26e6f1db2a52 k8s.gcr.io/kube-controller-manager:v1.13.1
    [root@node01 ~]# docker tag f59dcacceff4 k8s.gcr.io/coredns:1.2.6
    [root@node01 ~]# docker tag 3cab8e1b9802 k8s.gcr.io/etcd:3.2.24
    [root@node01 ~]# docker tag f0fad859c909 quay.io/coreos/flannel:v0.10.0-amd64
    [root@node01 ~]# docker tag da86e6ba6ca1 k8s.gcr.io/pause:3.1

    [root@node01 ~]# kubeadm join 192.168.3.100:6443 --token nscdt6.1f73g6w9t80tddx0 --discovery-token-ca-cert-hash
    sha256:3a5c7da23306cf1e869fec140e4d187056edf146affe5c6ee8007cc2de6b349b --ignore-preflight-errors=Swap

 

node02 :
  1、
    [root@master ~]# scp rpm-package-key.gpg node02:/root/
    [root@node02 ~]# yum install docker-ce kubelet kubeadm
    [root@master ~]# scp /usr/lib/systemd/system/docker.service node02:/usr/lib/systemd/system/docker.service
    [root@master ~]# scp /etc/sysconfig/kubelet node02:/etc/sysconfig/
    [root@node02 ~]# systemctl daemon-reload
    [root@node02 ~]# systemctl start docker
    [root@node02 ~]# systemctl enable docker
    [root@node02 ~]# systemctl enable kubelet
    [root@node02 ~]# echo "1" >/proc/sys/net/bridge/bridge-nf-call-ip6tables
    [root@node02 ~]# echo "1" >/proc/sys/net/bridge/bridge-nf-call-iptables

  2、
    [root@master ~]# scp myimages.gz node02:/root/    #将master的镜像copy到node02
    [root@node02 ~]# docker load -i myimages.gz

    [root@node02 ~]# docker tag fdb321fd30a0 k8s.gcr.io/kube-proxy:v1.13.1
    [root@node02 ~]# docker tag 40a63db91ef8 k8s.gcr.io/kube-apiserver:v1.13.1
    [root@node02 ~]# docker tag ab81d7360408 k8s.gcr.io/kube-scheduler:v1.13.1
    [root@node02 ~]# docker tag 26e6f1db2a52 k8s.gcr.io/kube-controller-manager:v1.13.1
    [root@node02 ~]# docker tag f59dcacceff4 k8s.gcr.io/coredns:1.2.6
    [root@node02 ~]# docker tag 3cab8e1b9802 k8s.gcr.io/etcd:3.2.24
    [root@node02 ~]# docker tag f0fad859c909 quay.io/coreos/flannel:v0.10.0-amd64
    [root@node02 ~]# docker tag da86e6ba6ca1 k8s.gcr.io/pause:3.1

    [root@node02 ~]# kubeadm join 192.168.3.100:6443 --token nscdt6.1f73g6w9t80tddx0 --discovery-token-ca-cert-hash
    sha256:3a5c7da23306cf1e869fec140e4d187056edf146affe5c6ee8007cc2de6b349b --ignore-preflight-errors=Swap

 

最后:检查集群状况

    [root@master ~]# kubectl get cs    #检查各组件健康状况
    [root@master ~]# kubectl get nodes    #查看节点
    [root@master ~]# kubectl get ns   #查看所有名称空间
    [root@master ~]# kubectl describe node node01    #查看一个节点的详细信息
    [root@master ~]# kubectl cluster-info    #查看集群信息

 

posted @ 2019-02-28 18:31  米兰的小铁將  阅读(236)  评论(0编辑  收藏  举报