k8s集群部署+docker

kubeadm reset -f
yum remove -y kubeadm kubelet kubectl
yum remove -y docker* containerd*
rm -rf /etc/kubernetes /var/lib/kubelet /var/lib/etcd /etc/docker /etc/containerd
rm -rf /etc/yum.repos.d/kubernetes.repo

# 关闭防火墙
systemctl stop firewalld
systemctl disable firewalld

# 关闭selinux
sed -i 's/enforcing/disabled/' /etc/selinux/config  # 永久
setenforce 0  # 临时

# 关闭swap
swapoff -a  # 临时
sed -ri 's/.*swap.*/#&/' /etc/fstab    # 永久

# 根据规划设置主机名
hostnamectl set-hostname <hostname>

# 在master添加hosts
cat >> /etc/hosts << EOF
192.168.1.146 k8smaster
192.168.1.145 k8snode1
192.168.1.144 k8snode2
EOF

# 将桥接的IPv4流量传递到iptables的链
cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system  # 生效

# 时间同步
yum install ntpdate -y
ntpdate time.windows.com

yum install -y yum-utils
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install -y docker-ce-23.0.6 docker-ce-cli-23.0.6 containerd.io

# 启动Docker
systemctl enable --now docker

cat > /etc/docker/daemon.json <<EOF
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "registry-mirrors": ["https://docker.1ms.run"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2"
}
EOF

systemctl daemon-reload
systemctl restart docker

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=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

yum install -y kubelet-1.23.17 kubeadm-1.23.17 kubectl-1.23.17 --disableexcludes=kubernetes

# 启动kubelet
systemctl enable --now kubelet

kubeadm init \
  --apiserver-advertise-address=192.168.1.146 \
  --image-repository registry.aliyuncs.com/google_containers \
  --kubernetes-version v1.23.17 \
  --service-cidr=10.96.0.0/12 \
  --pod-network-cidr=10.244.0.0/16

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


$ kubectl get nodes

kubeadm join 192.168.1.146:6443 --token y4k6va.wtjx112a7lh6ye92 \
        --discovery-token-ca-cert-hash sha256:065147d0d6a0122134700ee00150b5490a84f74fd9c786fc7a36d236d8a89ec6

kubeadm token create --print-join-command

wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

# 默认镜像地址无法访问，sed命令修改为docker hub镜像仓库。
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

kubectl get pods -n kube-system
NAME                          READY   STATUS    RESTARTS   AGE
kube-flannel-ds-amd64-2pc95   1/1     Running   0          72s

kubectl create deployment nginx --image=nginx

kubectl expose deployment nginx --port=80 --type=NodePort

# 可以看到nginx的端口
kubectl get pod,svc