使用kubeadm部署k8s_无坑适用版本

一、环境配置

1.1 系统信息

CentOS Linux release 7.6.1810 (Core)
3.10.0-957.27.2.el7.x86_64

2.2 准备环境

a. 关闭防火墙

systemctl stop firewalld
systemctl disable firewalld

b. 关闭selinux

sed -i 's/enforcing/disabled/' /etc/selinux/config 
setenforce 0

c.关闭swap交换分区

echo "vm.swappiness = 0">> /etc/sysctl.conf
swapoff -a

d. 开启IPV4流量转发

cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF

e. 加载内核模块

modprobe br_netfilter

f.设置repo源

mv /etc/yum.repos.d/*  /tmp/

# base repo
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

# docker repo
curl -o /etc/yum.repos.d/docker-ce.repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

# k8s repo 
cat > /etc/yum.repos.d/kubernetes.repo << EOF
[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
EOF

# update cache
yum clean all  
yum makecache  
yum repolist

g. 安装常用包

yum install vim bash-completion net-tools gcc -y

三、所有节点安装K8S组件

3.1 安装docker/kubeadm/kubelet

# 安装docker
yum install docker-ce-18.06.3.ce -y

# 添加阿里云仓库加速（最好换成自己的） 
mkdir -p /etc/docker
tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://ahtqbhz9.mirror.aliyuncs.com"]
}
EOF

systemctl daemon-reload
systemctl restart docker
systemctl enable docker

# 安装 kubeadm、kubelet、kubectl
yum install -y kubelet-1.18.0 kubeadm-1.18.0 kubectl-1.18.0
systemctl enable kubelet

3.2 部署Kubernetes Master

# apiserver-advertise-address地址就是master的IP。
kubeadm init --kubernetes-version=1.18.0  
--apiserver-advertise-address=10.128.143.100   
--image-repository registry.aliyuncs.com/google_containers  
--service-cidr=10.10.0.0/16 --pod-network-cidr=10.122.0.0/16

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

--apiserver-advertise-address： 根据实际MASTER IP地址填写

3.3 设置命令补全

source <(kubectl completion bash)

3.4 安装calico网络

kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml

3.5 检测pod和node

kubectl get pod --all-namespaces
kubectl get node

3.6 使用单节点k8s

kubectl taint nodes --all node-role.kubernetes.io/master-

默认master节点不会调用pod，清除(taint)污点，有(taint)污点的节点不会调用pod

文章摘要：

原文链接：https://how2play.club /archives/使用kubeadm部署k8s