一、環境配置

1.1 系統資訊

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

2.2 準備環境

a. 關閉防火牆

systemctl stop firewalld
systemctl disable firewalld

b.關閉selinux

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

c.關閉swap交換分割槽

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

d. 開啟IPV4流量轉發

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

e. 載入核心模組

modprobe br_netfilter

f.設定repo源

rm -rfv /etc/yum.repos.d/*

# 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.安裝常用包

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

三、所有節點安裝K8S元件

3.1 安裝docker/kubeadm/kubelet

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

# 新增阿里雲倉庫加速（最好換成自己的） 
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

# 安裝 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： 根據實際MASTER IP地址填寫

3.3 設定命令補全

source <(kubectl completion bash)

3.4安裝calico網路

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

3.5 檢測pod和node

kubectl get pod --all-namespaces
kubectl get node

3.6 使用單節點k8s

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

預設master節點不用呼叫pod，清除(taint)汙點，有(taint)汙點的節點不會呼叫pod

文章摘要：

原文連結：https://how2play.club /archives/使用kubeadm部署k8s