docker

1.更新yum

yum update

2.移除旧版本  

sudo yum remove docker 
                  docker-client 
                  docker-client-latest 
                  docker-common 
                  docker-latest 
                  docker-latest-logrotate 
                  docker-logrotate 
                  docker-engine

3.安装docker

sudo yum install -y yum-utils 
设置阿里云镜像仓库
sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
sudo yum install docker-ce
启动并设置开机启动
systemctl enable docker && systemctl start docker
查看docker安装信息
docker info
如果出现如下信息：
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled 
可设置：
vi /etc/sysctl.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
sysctl -p

4.设置kubelet镜像

vi /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
       http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg

5.安装kubelet

yum install -y kubelet kubeadm kubectl
systemctl enable kubelet  && systemctl start kubelet
kubeadm config images list
6.拉取镜像
vi k8s.sh
#!/bin/bash
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;

kubeadm init
vi /etc/sysctl.conf
net.bridge.bridge-nf-call-iptables = 1
swapoff -a
vi /etc/fstab

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

6.常用命令

kubectl get pods --all-namespaces
systemctl daemon-load
journalctl -xefu kubelet -l