K8S需要先安装docker-ce(docker的社区版本,目前K8S不支持18.06以上的版本)

安装docker-ce

yum-config-manager --add-repo http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/docker-ce.repo
yum makecache fast
yum -y install docker-ce

如果不行改成下面这样

[docker-ce-stable]
name=Docker CE Stable - $basearch
baseurl=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/7/$basearch/stable
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/gpg

[docker-ce-stable-debuginfo]
name=Docker CE Stable - Debuginfo $basearch
baseurl=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/7/debug-$basearch/stable
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/gpg

[docker-ce-stable-source]
name=Docker CE Stable - Sources
baseurl=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/7/source/stable
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/gpg

[docker-ce-edge]
name=Docker CE Edge - $basearch
baseurl=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/7/$basearch/edge
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/gpg

[docker-ce-edge-debuginfo]
name=Docker CE Edge - Debuginfo $basearch
baseurl=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/7/debug-$basearch/edge
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/gpg

[docker-ce-edge-source]
name=Docker CE Edge - Sources
baseurl=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/7/source/edge
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/gpg

[docker-ce-test]
name=Docker CE Test - $basearch
baseurl=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/7/$basearch/test
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/gpg

[docker-ce-test-debuginfo]
name=Docker CE Test - Debuginfo $basearch
baseurl=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/7/debug-$basearch/test
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/gpg

[docker-ce-test-source]
name=Docker CE Test - Sources
baseurl=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/7/source/test
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/gpg

[docker-ce-nightly]
name=Docker CE Nightly - $basearch
baseurl=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/7/$basearch/nightly
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/gpg

[docker-ce-nightly-debuginfo]
name=Docker CE Nightly - Debuginfo $basearch
baseurl=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/7/debug-$basearch/nightly
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/gpg

[docker-ce-nightly-source]
name=Docker CE Nightly - Sources
baseurl=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/7/source/nightly
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.aliyuncs.com/docker-ce/linux/centos/gpg

有公网IP的ECS

echo '[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'>/etc/yum.repos.d/kubernetes.repo

VPC网络的ECS

echo '[kubernetes]
name=Kubernetes
baseurl=http://mirrors.cloud.aliyuncs.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=http://mirrors.cloud.aliyuncs.com/kubernetes/yum/doc/yum-key.gpg http://mirrors.cloud.aliyuncs.com/kubernetes/yum/doc/rpm-package-key.gpg'>/etc/yum.repos.d/kubernetes.repo

所有节点安装
yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
systemctl enable kubelet && systemctl start kubelet


Master节点

kubeadm init --kubernetes-version=1.12.3 --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=master节点的IP
等了半天报错,原因是下载镜像失败
报错是因为我们是民主国家,你懂的,提供以下两种方案


1 手动方案

先修改默认存储位置和镜像加速
echo '{"registry-mirrors": ["https://registry.docker-cn.com"],"graph": "/data/docker"}' > /etc/docker/daemon.json
systemctl enable docker
systemctl start docker

[root@k8s-m ~]# docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver-amd64:v1.12.3
[root@k8s-m ~]# docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager-amd64:v1.12.3
[root@k8s-m ~]# docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler-amd64:v1.12.3
[root@k8s-m ~]# docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy-amd64:v1.12.3
[root@k8s-m ~]# docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/etcd-amd64:3.2.24
[root@k8s-m ~]# docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1
[root@k8s-m ~]# docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.2.2
[root@k8s-m ~]# docker images
REPOSITORY                                                                          TAG                 IMAGE ID            CREATED             SIZE
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy-amd64                v1.12.1             61afff57f010        12 days ago         96.6MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver-amd64            v1.12.1             dcb029b5e3ad        12 days ago         194MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager-amd64   v1.12.1             aa2dd57c7329        12 days ago         164MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler-amd64            v1.12.1             d773ad20fd80        12 days ago         58.3MB
registry.cn-hangzhou.aliyuncs.com/google_containers/etcd-amd64                      3.2.24              3cab8e1b9802        3 weeks ago         220MB
registry.cn-hangzhou.aliyuncs.com/google_containers/coredns                         1.2.2               367cdc8433a4        7 weeks ago         39.2MB
registry.cn-hangzhou.aliyuncs.com/google_containers/pause                           3.1                 da86e6ba6ca1        10 months ago       742kB

重新TAG
[root@k8s-m ~]# docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1 k8s.gcr.io/pause:3.1
[root@k8s-m ~]# docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.2.2 k8s.gcr.io/coredns:1.2.2
[root@k8s-m ~]# docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/etcd-amd64:3.2.24 k8s.gcr.io/etcd:3.2.24
[root@k8s-m ~]# docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler-amd64:v1.12.3 k8s.gcr.io/kube-scheduler:v1.12.3
[root@k8s-m ~]# docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager-amd64:v1.12.3 k8s.gcr.io/kube-controller-manager:v1.12.3
[root@k8s-m ~]# docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver-amd64:v1.12.3 k8s.gcr.io/kube-apiserver:v1.12.3
[root@k8s-m ~]# docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy-amd64:v1.12.3 k8s.gcr.io/kube-proxy:v1.12.3

2 自动方案

所有节点
mkdir -p /data/operations/script/
以上镜像操作部分可以批量执行的shell脚本(需要公网IP)

echo '
#!/bin/bash
systemctl enable docker
systemctl start docker
echo '{"registry-mirrors": ["https://registry.docker-cn.com"],"graph": "/data/docker"}' > /etc/docker/daemon.json
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver-amd64:v1.12.3
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager-amd64:v1.12.3
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler-amd64:v1.12.3
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy-amd64:v1.12.3
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/etcd-amd64:3.2.24
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.2.2
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.2.3
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.2.4

docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.1 k8s.gcr.io/pause:3.1
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.2.2 k8s.gcr.io/coredns:1.2.2
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.2.3 k8s.gcr.io/coredns:1.2.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.2.4 k8s.gcr.io/coredns:1.2.4
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/etcd-amd64:3.2.24 k8s.gcr.io/etcd:3.2.24
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler-amd64:v1.12.3 k8s.gcr.io/kube-scheduler:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager-amd64:v1.12.3 k8s.gcr.io/kube-controller-manager:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver-amd64:v1.12.3 k8s.gcr.io/kube-apiserver:v1.12.3
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy-amd64:v1.12.3 k8s.gcr.io/kube-proxy:v1.12.3' > /data/operations/script/images.sh

chmod +x /data/operations/script/images.sh
sh /data/operations/script/images.sh

kubeadm init --kubernetes-version=1.12.3 --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=10.0.0.170

  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://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
kubeadm join 172.16.0.51:6443 --token j0u8rp.wknfkxa8ynw89lq8 --discovery-token-ca-cert-hash sha256:e946decc81a2dc06268425e5312a2c9eced90c79683e5e5e05b93b5cf43df054

这里生成的初始token可能无法使用,如果无法使用执行以下命令新生成一个
kubeadm token create --print-join-command


二、所有节点通用操作

[root@k8s-m ~]# echo '[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'>/etc/yum.repos.d/kubernetes.repo

[root@k8s-m ~]# yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
已安装:
  kubeadm.x86_64 0:1.12.1-0                  kubectl.x86_64 0:1.12.1-0                  kubelet.x86_64 0:1.12.1-0
作为依赖被安装:
  cri-tools.x86_64 0:1.12.0-0              kubernetes-cni.x86_64 0:0.6.0-0              socat.x86_64 0:1.7.3.2-2.el7
[root@k8s-m ~]# systemctl enable kubelet && systemctl start kubelet
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /etc/systemd/system/kubelet.service.

kubeadm join 10.0.0.170:6443 --token 6s89xu.1x06dy6c1vvyl22n --discovery-token-ca-cert-hash sha256:868b352cb5865ae4dc0c5a0394e94e92cfbb8ba3a8615590aab4292ce1cef17e

TIPS

如果缺少部分镜像请到阿里云的容器镜像服务中搜索,下载后重新TAG