K8S：kubeadm安装k8s（docker引擎）

规划主机

192.168.50.200 k8s-master 2核4g

192.168.50.201 k8s-node1 2核2g

192.168.50.202 k8s-node2 2核2g

初始操作

# 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

# 关闭完swap后，一定要重启一下虚拟机！！！
# 根据规划设置主机名
hostnamectl set-hostname <hostname>

# 在master添加hosts
cat >> /etc/hosts << EOF
192.168.50.200 k8s-master
192.168.50.201 k8s-node1
192.168.50.202 k8s-node2
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

添加k8s与docker的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=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

wget -O /etc/yum.repos.d/docker-ce.repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

安装组件并配置镜像加速与docker驱动

# 安装docker与k8s安装组件
yum -y install docker-ce-20.10.24-3.el7 docker-ce-cli-20.10.24-3.el7 containerd.io kubelet-1.23.6 kubeadm-1.23.6 kubectl-1.23.6

# 开机自启
systemctl enable docker
systemctl enable kubelet

# 配置docker
mkdir /etc/docker
vi /etc/docker/daemon.json
{
    "registry-mirrors": [
        "https://hub-mirror.c.163.com/",
        "https://dockerhub.icu",
        "https://doublezonline.cloud",
        "https://docker.m.daocloud.io",
        "https://-----.aliyuncs.com" #你的阿里云加速
    ],
    "insecure-registries": [
  
    ],
    "exec-opts": [
        "native.cgroupdriver=systemd" #修改docker驱动
    ]
}

# 启动docker
systemctl start docker

部署k8s的master

kubeadm init \
      --apiserver-advertise-address=192.168.113.120 \
      --image-repository registry.aliyuncs.com/google_containers \
      --kubernetes-version v1.23.6 \
      --service-cidr=10.96.0.0/12 \
      --pod-network-cidr=10.244.0.0/16

成功后

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

节点加入

复制master的Token

kubeadm join 192.168.113.120:6443 --token w34ha2.66if2c8nwmeat9o7 --discovery-token-ca-cert-hash sha256:20e2227554f8883811c01edd850f0cf2f396589d32b57b9984de3353a7389477

节点检查

[root@k8s-master ~]# kubectl get nodes
NAME          STATUS     ROLES                  AGE   VERSION
k8s-master    NotReady   control-plane,master   15h   v1.23.6
k8s-node1    NotReady   <none>                 15h   v1.23.6
k8s-node2    NotReady   <none>                 99s   v1.23.6

注意

k8s支持的最后的docker版本为20.10.24，若高于此版本请降级。

docker需要修改驱动。