kubeadm-install-k8s-cluster

Task0 preparation

Install docker

cd /etc/yum.repos.d
wget  https://download.docker.com/linux/centos/docker-ce.repo
yum install -y docker-ce

systemctl enable docker && systemctl restart docker 

Task1 Installing kubeadm, kubelet and kubectl

https://kubernetes.io/docs/setup/independent/install-kubeadm/

#  001 add rpm source

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[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
exclude=kube*
EOF

# 002 Set SELinux in permissive mode (effectively disabling it)

setenforce 0
sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config

swapoff -a

# 003 install 

yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes

systemctl enable --now kubelet

Task2 create-cluster-kubeadm

https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/

pull kubeadm init需要的镜像

kubeadm config images pull

kubeadm init初始化

kubeadm init --pod-network-cidr=10.244.0.0/16

配置kubectl

# config kubectl 

mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config

安装flannel 插件

# install flannel 
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/a70459be0084506e4ec919aa1c114638878db11b/Documentation/kube-flannel.yml

其它节点加入

# 
kubeadm join xxx

参考

k8s安装和集群初始化 https://blog.csdn.net/Blanchedingding/article/details/80861293