三，Master节点安装Docker，kubeadm，kubelet，kubectl

小咪咪 2021-09-22 00:30 330阅读 0赞

### 安装过程 ###

**1，安装基本软件包**

yum install wget net‐tools vim bash‐comp* ‐y

**2，设置主机名，管理节点设置主机名为master**

hostnamectl set-hostname master
    su root

**3，配置 Master 和 work 节点的域名**

vim /etc/hosts
    
    192.168.1.50 master
    192.168.1.51 node1
    192.168.1.52 node2

**4，关闭 防火墙**

systemctl stop firewalld
    systemctl disable firewalld

**5，关闭 SeLinux**

setenforce 0
    sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config

**6，关闭 swap**

swapoff -a
    yes | cp /etc/fstab /etc/fstab_bak
    cat /etc/fstab_bak |grep -v swap > /etc/fstab

**7，配置Docker, K8S的阿里云yum源**

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

**8，安装并启动 docker**

yum install -y docker-ce.x86_64 docker-ce-cli.x86_64 containerd.io.x86_64
    
    mkdir /etc/docker
    
    cat > /etc/docker/daemon.json <<EOF
    {
      "registry-mirrors": ["https://registry.cn-hangzhou.aliyuncs.com"],
      "exec-opts": ["native.cgroupdriver=systemd"]
    }
    EOF

**9，编辑/usr/lib/systemd/system/docker.service**

vi /usr/lib/systemd/system/docker.service
    
    ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --exec-opt native.cgroupdriver=systemd

# Restart Docker
    systemctl daemon-reload
    systemctl enable docker
    systemctl restart docker

此时查看 docker info，可以看到默认 Cgroup Driver为 systemd

卸载旧版本

yum remove -y kubelet kubeadm kubectl

安装kubelet、kubeadm、kubectl

yum install -y kubeadm-1.19.3-0 kubectl-1.19.3-0  kubelet-1.19.3-0

重启 docker，并启动 kubelet

systemctl enable kubelet && systemctl start kubelet

**10，初始化Master 节点**

将桥接的IPv4流量传递到iptables的链

echo "1" >/proc/sys/net/bridge/bridge-nf-call-iptables
    
    vi /etc/sysctl.d/k8s.conf
    
    net.bridge.bridge-nf-call-ip6tables = 1
    net.bridge.bridge-nf-call-iptables = 1

初始化主节点

kubeadm init --kubernetes-version=1.19.2 \
    --apiserver-advertise-address=192.168.1.50 \
    --image-repository registry.aliyuncs.com/google_containers \
    --service-cidr=10.1.0.0/16 \
    --pod-network-cidr=10.244.0.0/16

看到这一步表示已经成功了

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2VjaGl6YW8xODM5_size_16_color_FFFFFF_t_70][]

执行以下一下命令

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

记录下来，备用

> kubeadm join 192.168.1.50:6443 --token 9uomuo.5trla2410rvc4yum \\  
>     --discovery-token-ca-cert-hash sha256:e817908582b98d16e92dabecb1d413691676024a5a2e7ba04ed20bd354b0c7a8

安装网络插件 Flannel

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

被墙了，网络不通

![20210606172013113.png][]

手动下载  [https://download.csdn.net/download/echizao1839/19418584][https_download.csdn.net_download_echizao1839_19418584]

kubectl apply -f kube-flannel.yml

![20210606175340175.png][]

查看是否成功创建flannel网络

ifconfig |grep flannel
    kubectl get po -n kube-system

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2VjaGl6YW8xODM5_size_16_color_FFFFFF_t_70 1][]

重置 kubeadm

kubeadm reset

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2VjaGl6YW8xODM5_size_16_color_FFFFFF_t_70]: /images/20210920/9cc08b6218d746c5a7e489d3b7c53a7d.png
[20210606172013113.png]: /images/20210920/f30ec2b8937449fdba77dfec4163cef3.png
[https_download.csdn.net_download_echizao1839_19418584]: https://download.csdn.net/download/echizao1839/19418584
[20210606175340175.png]: /images/20210920/27e0af069bf5459e9795b837b5e96d86.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2VjaGl6YW8xODM5_size_16_color_FFFFFF_t_70 1]: /images/20210920/cb4e70fcc24d4969beb5f755106d94da.png