K8s
最基本的硬件要求
CPU:双核
MEm:2G
3台dockerhost 时间必须同步
kubeadm工具
三台全部操作:
1.命名:
[root@docker01 ~]# hostnamectl set-hostname master

[root@docker02 ~]# hostnamectl set-hostname node02

[root@docker03 ~]# hostnamectl set-hostname node03
1.
3台都验证docker:(版本必须一样)
2.
[root@master ~]# docker -v
Docker version 18.09.0, build 4d60db4
1.
3台docker禁用swap.
2.

  1. [root@master ~]# swapoff -a ##临时禁用

      [root@master ~]# free -h
                    total       used       free     shared buff/cache   available
      Mem:           1.8G       521M       193M         18M       1.1G       1.0G
      Swap:           0B         0B         0B

  2. [root@master ~]# vim /etc/fstab

    11行:#/dev/mapper/cl-swap     swap  

  3. 添加域名解析:
    [root@master ~]# vim /etc/hosts

    192.168.1.10 master
    192.168.1.20 node02
    192.168.1.30 node03
    master:
    免密登录:
    [root@master ~]# ssh-keygen -t rsa

    [root@master ~]# ssh-copy-id node02

    [root@master ~]# ssh-copy-id node03
    [root@master ~]# vim /etc/sysctl.d/k8s.conf   ###打开iptables桥接功能

    net.bridge.bridge-nf-call-iptables = 1
    net.bridge.bridge-nf-call-ip6tables = 1
    路由转发:
    [root@master ~]# echo net.ipv4.ip_forward = 1 >> /etc/sysctl.conf
    [root@master ~]# sysctl -p

    [root@master ~]# sysctl -p /etc/sysctl.d/k8s.conf
    没成功输入下面的条件:

    [root@master ~]# modprobe br_netfilter
    [root@master ~]# scp /etc/sysctl.d/k8s.conf node02:/etc/sysctl.d/

    [root@master ~]# scp /etc/sysctl.d/k8s.conf node03:/etc/sysctl.d/

    [root@master ~]# scp /etc/sysctl.conf node02:/etc/

    [root@master ~]# scp /etc/sysctl.conf node03:/etc/
    三台都弄:
    添加yum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=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

    [root@master ~]# yum repolist

    [root@master ~]# yum makecache fast
    安装依赖包:
    master:

    [root@master ~]# yum -y install kubeadm-1.15.0-0 kubelet-1.15.0-0 kubectl-1.15.0-0

    node02:

    [root@node02 ~]# yum -y install kubeadm-1.15.0-0 kubelet-1.15.0-0

    node03:

    [root@node03 ~]# yum -y install kubeadm-1.15.0-0 kubelet-1.15.0-0

    报错为网络原因

    安装:[root@node03 ~]# yum -y install cri-tools-1.13.0-0.x86_64




    三台:
    [root@master ~]# systemctl enable kubelet
    master:
    基础镜像全部导入:
    coredns-1-3-1.tar

    etcd-3-3-10.tar

    kube-apiserver-1-15.tar

    kube-controller-1-15.tar

    kube-proxy-1-15.tar

    kube-scheduler-1-15.tar

    myflannel-11-0.tar

    pause-3-1.tar
    [root@master ~]# vim image.sh
    #!/bin/bash
    for i in /root/*
    do
    docker load < $i
    done
    [root@master ~]# kubeadm init --kubernetes-version=v1.15.0 --pod-network-cidr=10.244.0.0/16 --service-cidr=10.96.0.0/12 --ignore-preflight-errors=Swap
    重置,如果节点出现错误:
    [root@master ~]# kubeadm reset
    [root@master ~]# mkdir -p $HOME/.kube
    [root@master ~]# cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
    [root@master ~]# chown $(id -u):$(id -g) $HOME/.kube/config
    kubeadm join 192.168.1.10:6443 --token d8vpkc.4brscvprfhu87ohj \ --discovery-token-ca-cert-hash sha256:79e58944d84941ce4d2d42ab84aa3772e7db0af50f1f724d4f1da84a4be528a3
    查看节点信息:
    [root@master ~]# kubectl get node
    解决网络问题:
    [root@master ~]# kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
    [root@master ~]# kubectl get node
    NAME     STATUS   ROLES   AGE   VERSION
    master   Ready   master   20m   v1.15.0
    node2和node3:
    [root@node02 ~]# mkdir images
    [root@node02 ~]# cd images/

    [root@node02 images]# rz

    [root@node02 images]# ls
    kube-proxy-1-15.tar myflannel-11-0.tar pause-3-1.tar

    [root@node02 images]# docker load < kube-proxy-1-15.tar && docker load < myflannel-11-0.tar && docker load < pause-3-1.tar

    [root@node02 images]# kubeadm join 192.168.1.10:6443 --token d8vpkc.4brscvprfhu87ohj     --discovery-token-ca-cert-hash sha256:79e58944d84941ce4d2d42ab84aa3772e7db0af50f1f724d4f1da84a4be528a3
    master:
    [root@master ~]# kubectl get node
    NAME     STATUS   ROLES   AGE   VERSION
    master   Ready   master   24m   v1.15.0
    node02   Ready   <none>   32s   v1.15.0
    node03   Ready   <none>   32s   v1.15.0
    导入:
    kube-flannel.yml
    [root@master ~]# cat .vimrc
    set tabstop=2
    [root@master ~]# source .vimrc

    [root@master ~]# source /usr/share/bash-completion/bash_completion

    [root@master ~]# source <(kubectl completion bash)

    [root@master ~]# echo "source <(kubectl completion bash)" >> ~/.bashrc