一、目前近況

docker 版本 K8S支持 18.06的

二、安裝docker

#1.配置倉庫
sudo yum install -y yum-utils device-mapper-persistent-data lvm2
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

#2.可以查看所有倉庫中所有docker版本，並選擇特定版本安裝
yum list docker-ce --showduplicates | sort -r

#安裝docker 版本 K8S支持 高版本為18.06的
sudo yum install docker-ce-18.06.0.ce-3.el7
docker version

默認操作

1、禁用並關閉防火墻或者直接一句話
systemctl stop firewalld & systemctl disable firewalld
2、關閉selinux
setenforce 0
3、關閉swap
swapoff -a
4、修改host配置使得各主機可通過主機名訪問，方便更新和遷移
echo ‘39.96.69.98 kubernetes-master‘ >> /etc/hosts
echo ‘47.94.174.85 kubernetes-node01‘ >> /etc/hosts
5、開啟  br_netfilter kernel module
modprobe br_netfilter
echo ‘1‘ > /proc/sys/net/bridge/bridge-nf-call-iptables
echo ‘1‘ > /proc/sys/net/ipv4/ip_forward
6、配置iptables/netfilter-配置系統內核參數使流過網橋的流量也進入iptables/netfilter框架中，在/etc/sysctl.conf中添加以下配置:
echo "net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1" >> /etc/sysctl.conf
sysctl -p

三、安裝kubelet、kubeadm、docker

配置阿裏雲源

cat <<EOF > /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
EOF

安裝

yum install -y kubelet kubeadm kubectl

4、啟動 docker and kublet

systemctl start docker && systemctl enable docker
systemctl start kubelet && systemctl enable kubelet

四、下載K8S相關鏡像:

kubeadm init 命令默認使用的docker鏡像倉庫為k8s.gcr.io，國內無法直接訪問，於是需要變通一下。

首先查看需要使用哪些鏡像　

kubeadm config images list
#輸出如下結果
[root@iZ2zeaqk5x4qdbb3c25vbsZ ~]# kubeadm config images list
k8s.gcr.io/kube-apiserver:v1.13.4
k8s.gcr.io/kube-controller-manager:v1.13.4
k8s.gcr.io/kube-scheduler:v1.13.4
k8s.gcr.io/kube-proxy:v1.13.4
k8s.gcr.io/pause:3.1
k8s.gcr.io/etcd:3.2.24
k8s.gcr.io/coredns:1.2.6

1、

docker pull mirrorgooglecontainers/kube-apiserver:v1.13.4 &&
docker tag mirrorgooglecontainers/kube-apiserver:v1.13.4 k8s.gcr.io/kube-apiserver:v1.13.4 &&
docker rmi mirrorgooglecontainers/kube-apiserver:v1.13.4

2、

docker pull mirrorgooglecontainers/kube-controller-manager:v1.13.4 &&
docker tag mirrorgooglecontainers/kube-controller-manager:v1.13.4 k8s.gcr.io/kube-controller-manager:v1.13.4 &&
docker rmi mirrorgooglecontainers/kube-controller-manager:v1.13.4　　

3、

docker pull mirrorgooglecontainers/kube-scheduler:v1.13.4 &&
docker tag mirrorgooglecontainers/kube-scheduler:v1.13.4 k8s.gcr.io/kube-scheduler:v1.13.4 &&
docker rmi mirrorgooglecontainers/kube-scheduler:v1.13.4

4、

docker pull mirrorgooglecontainers/kube-proxy:v1.13.4 &&
docker tag mirrorgooglecontainers/kube-proxy:v1.13.4 k8s.gcr.io/kube-proxy:v1.13.4 &&
docker rmi mirrorgooglecontainers/kube-proxy:v1.13.4

5、

docker pull mirrorgooglecontainers/pause:3.1 &&
docker tag mirrorgooglecontainers/pause:3.1 k8s.gcr.io/pause:3.1 &&
docker rmi mirrorgooglecontainers/pause:3.1

6、

docker pull mirrorgooglecontainers/etcd:3.2.24 &&
docker tag mirrorgooglecontainers/etcd:3.2.24 k8s.gcr.io/etcd:3.2.24 &&
docker rmi mirrorgooglecontainers/etcd:3.2.24

7、

docker pull coredns/coredns:1.2.6 &&
docker tag coredns/coredns:1.2.6 k8s.gcr.io/coredns:1.2.6 &&
docker rmi coredns/coredns:1.2.6

五、搭建Master節點(init方式即可)

kubeadm init --kubernetes-version=v1.13.4 --ignore-preflight-errors=NumCPU

 kubeadm join 172.17.149.114:6443 --token 1h1k6c.1mo2wfir18fr62pr --discovery-token-ca-cert-hash sha256:469920497b661c121730a7bd373e00098edb5c252daf2eb47c4d0b29e78ddd2c

六、搭建Node節點(join方式即可)　　

三、kubernetes環境搭建(實踐)