Install K8s on CentOS
建议配置docker 加速器
https://www.jianshu.com/p/1a4025c5f186
本文参考网址：
https://www.techrepublic.com/article/how-to-install-a-kubernetes-cluster-on-centos-7/
关闭防火墙
systemctl stop firewalld
systemctl disable firewalld
禁用SELINUX
setenforce 0
sed -i --follow-symlinks 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/sysconfig/selinux
关闭swap
swapoff -a
或永久关闭
vi /etc/fstab
comment this line
# /dev/mapper/centos-swap swap swap defaults 0 0
设置br_netfilter
modprobe br_netfilter
echo '1' > /proc/sys/net/bridge/bridge-nf-call-iptables
添加yum源
vi /etc/yum.repos.d/kubernetes.repo
添加内容如下-建议从本文参考网址拷贝如下内容，防止格式差异(本文第四行)：
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg
https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
阿里云源20191230更新
[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
查看可用版本
yum list kubelet --showduplicate
然后安装 then install
yum install -y kubelet kubeadm kubectl
yum install -y kubelet-1.17.13-0 kubeadm-1.17.13-0 kubectl-1.17.13-0
yum install -y kubelet-1.13.5-0 kubeadm-1.13.5-0 kubectl-1.13.5-0 --skip-broken
systemctl daemon-reload
systemctl enable kubelet
systemctl restart kubelet
kubeadm init启动，参考
https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/
echo '1' > /proc/sys/net/bridge/bridge-nf-call-iptables
sudo bash -c 'echo 1 > /proc/sys/net/ipv4/ip_forward'
echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables
echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables
用阿里云的镜像启动 建立一个配置文件 #cat init-config.yaml apiVersion: kubeadm.k8s.io/v1beta1 kind: ClusterConfiguration kubernetesVersion: v1.16.4 imageRepository: registry.aliyuncs.com/google_containers
kubeadm config images pull –config=init-config.yaml
kubadm init:
calico:作为网络组件 --pod-network-cidr=192.168.0.0/16
kubeadm init --pod-network-cidr=192.168.0.0/16 --kubernetes-version=v1.17.13 --image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers
kubeadm init --kubernetes-version=v1.17.13 --image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers
kubeadm init --pod-network-cidr=192.168.0.0/17 --service-cidr=192.168.128.0/17 --kubernetes-version=v1.17.13 --image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers
kubeadm init --pod-network-cidr=192.168.0.0/16 --kubernetes-version=v1.17.13 --image-repository=registry.aliyuncs.com/google_containers
kubeadm init --network-plugin=cni --kubernetes-version=v1.17.13 --image-repository=registry.aliyuncs.com/google_containers
kubeadm init --kubernetes-version=v1.17.13 --image-repository=registry.aliyuncs.com/google_containers
calico： kubectl apply -f https://docs.projectcalico.org/archive/v3.14/manifests/calico.yaml
kubectl taint nodes --all node-role.kubernetes.io/master-
重新生成join语句
kubeadm token create --print-join-command --ttl=0
kubeadm join 172.16.20.199:6443 --token jncgw9.7bbex0rp5hah979y --discovery-token-ca-cert-hash sha256:a80e18efa6f775291373ba56142a9bc27514fd3917a0508ec429238a6e85e23d
常用命令：
kubectl get pod --namespace=kube-system
kubectl describe po kubernetes-dashboard-77fd78f978-kkffb --namespace=kube-system
The link to the Calico docs I used to install Calico v3.14.0 is:
kubectl apply -f https://docs.projectcalico.org/v3.14.0/manifests/calico-typha.yaml
kubectl apply -f https://docs.projectcalico.org/v3.14.0/manifests/calicoctl.yaml
查看集群信息
kubectl cluster-info
kubectl get pods --all-namespaces
sudo journalctl -u kubelet --all | tail
kubectl logs 99a04cab33e1 -n=istio-system
kubectl --kubeconfig=/home/linux/.kube/kubeconfig.yaml get svc -n ingress-nginx
watch kubectl get pods --all-namespaces
kubectl taint nodes --all node-role.kubernetes.io/master-
iptables -S -t nat
kubectl get cs,node,svc,pods,ingress --all-namespaces -o wide
卸载
yum remove kubelet kubeadm kubectl
安装指定版本
yum install -y kubelet-1.13.5-0.x86_64
yum install -y kubectl-1.13.5-0.x86_64
yum install -y kubeadm-1.13.5-0.x86_64
20191230更新
yum install -y kubelet-1.21.8-0 kubectl-1.21.8-0 kubeadm-1.21.8-0
yum install -y kubelet-1.17.8-0 kubectl-1.17.8-0 kubeadm-1.17.8-0
yum install -y kubeadm-1.14.6-0 kubelet-1.14.6-0 kubectl-1.14.6-0 --disableexcludes=kubernetes
查看日志
journalctl -f -u kubelet
编辑应用，不需要yaml文件 ：
kubectl edit deployment/my-nginx
管理组件
https://kuboard.cn/install/install-k8s.html#%E6%96%87%E6%A1%A3%E7%89%B9%E7%82%B9