k8s安装部署-锐单电子商城

k8s部署

k8s删除操作: yum -y remove kubelet kubeadm kubectl sudo kubeadm reset -f sudo rm -rvf $HOME/.kube sudo rm -rvf ~/.kube/ sudo rm -rvf /etc/kubernetes/ sudo rm -rvf /etc/systemd/system/kubelet.service.d sudo rm -rvf /etc/systemd/system/kubelet.service sudo rm -rvf /usr/bin/kube* sudo rm -rvf /etc/cni sudo rm -rvf /opt/cni sudo rm -rvf /var/lib/etcd sudo rm -rvf /var/etcd

docker版本必须与k8s对应

k8s安装部署：

1.安装k8s临时关闭swap ，若不关闭执行kubeadm有些命令会报错

[root@hhdcloudrd7 /]# cat /etc/fstab         #         # /etc/fstab         # Created by anaconda on Tue Apr 19 11:43:17 2022         #         # Accessible filesystems, by reference, are maintained under '/dev/disk'         # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info         #         /dev/mapper/centos_hhdcloudrd6-root /                       xfs     defaults        0 0         UUID=13a8fe45-33c8-4258-a434-133ce183d3c3 /boot                   xfs     defaults        0 0         #/dev/mapper/centos_hhdcloudrd6-swap swap                    swap    defaults        0 0

2.安装k8s可临时关闭selinux，减少额外配置

[root@localhost /]# cat /etc/sysconfig/selinux   # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: #     enforcing - SELinux security policy is enforced. #     permissive - SELinux prints warnings instead of enforcing. #     disabled - No SELinux policy is loaded. SELINUX=disabled # SELINUXTYPE= can take one of three values: #     targeted - Targeted processes are protected, #     minimum - Modification of targeted policy. Only selected processes are protected. #     mls - Multi Level Security protection. SELINUXTYPE=targeted

3.关闭防火墙：

systemctl stop firewalld systemctl disable firewalld

4 启用 bridge-nf-call-iptables 预防网络问题

echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables

5.设置网桥参数

cat << EOF > /etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 net.ipv4.ip_forward = 1 EOF

5.修改hosts查看域名映射文件方便

[root@hhdcloudrd7 /]# cat /etc/hosts 127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1         localhost localhost.localdomain localhost6 localhost6.localdomain6  192.168.34.7 k8s-master 192.168.5.129 k8s-node1 192.168.34.8 k8s-node2

6.查看系统版本的信息修改hosename

 [root@localhost /]# hostnamectl    Static hostname: localhost.localdomain          Icon name: computer-vm            Chassis: vm         Machine ID: 5c2c4826a7cd442a85c37d3b4dba39e0            Boot ID: 3f70bab69c37412da8eada29d50cc12c     Virtualization: vmware   Operating System: CentOS Linux 7 (Core)        CPE OS Name: cpe:/o:centos:centos:7             Kernel: Linux 3.10.0-1160.el7.x86_64       Architecture: x86-64   hostnamectl set-hostname k8s-node1 su root

7.查看cpu信息 k8s至少需要2核2G环境，否则安装失败(lscpu)

 curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun

8.修改docker的 /etc/docker/daemon.json文件

[root@localhost /]# cat /etc/docker/daemon.json {   "registry-mirrors": ["https://t81qmnz6.mirror.aliyuncs.com"],   "exec-opts": ["native.cgroupdriver=systemd"] }

9.修改后重启docker ，使docker与kubelet的cgroup 驱动一致

systemctl daemon-reload systemctl restart docker systemctl enable docker

10.查看kubelet驱动(不算)

cat /var/lib/kubelet/config.yaml |grep group

安装kubeadm kubelet kubectl

1.配置k8s下载资源配置文件

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

安装 kubelet kubeadm kubectl(这里一定要注意版本问题)

yum install -y --nogpgcheck kubelet-1.23.5 kubeadm-1.23.5 kubectl-1.23.5

kubelet ：运行在cluster，负责启动pod管理容器 kubeadm ：k8s用于初始化的快速施工工具cluster kubectl ：k8s命令工具，部署和管理应用程序，维护组件

3.检查安装是否成功

kubelet --version kubectl version kubeadm version

 4.启动kubelet
 systemctl daemon-reload
systemctl start kubelet
systemctl enable kubelet

 5.拉取init-config配置 并修改配置 ps. init-config 主要是由 api server、etcd、scheduler、controller-manager、coredns等镜像构成
 kubeadm config print init-defaults > init-config.yaml

 6.修改 刚才拉取的init-config.yaml文件
 [root@localhost /]# cat init-config.yaml
apiVersion: kubeadm.k8s.io/v1beta3
bootstrapTokens:
- groups:
  - system:bootstrappers:kubeadm:default-node-token
  token: abcdef.0123456789abcdef
  ttl: 24h0m0s
  usages:
  - signing
  - authentication
kind: InitConfiguration
localAPIEndpoint:
  advertiseAddress: 192.168.34.7   #master节点IP地址
  bindPort: 6443
nodeRegistration:
  criSocket: /var/run/dockershim.sock
  imagePullPolicy: IfNotPresent
  name: master   #master节点node的名称
  taints: null
---
apiServer:
  timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta3
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns: {}
etcd:
  local:
    dataDir: /var/lib/etcd
imageRepository: registry.aliyuncs.com/google_containers   #修改为阿里云地址
kind: ClusterConfiguration
kubernetesVersion: 1.23.0
networking:
  dnsDomain: cluster.local
  serviceSubnet: 10.96.0.0/12
scheduler: {}


 7.拉取k8s相关镜像
 kubeadm config images pull --config=init-config.yaml

 8.部署k8s（master）
 kubeadm init \
--apiserver-advertise-address=192.168.31.61 \
--image-repository registry.aliyuncs.com/google_containers \
--kubernetes-version v1.17.0 \
--service-cidr=10.96.0.0/12 \
--pod-network-cidr=10.244.0.0/16
 如果下载失败执行 kubeadm reset
 如果是使用1.24版本需要安装对应的CRI容器要不然就会报这个错误（最先开始我遇到这个问题是直接删了从部署的，请一定看好版本）
[ERROR CRI]: container runtime is not running: output: time=“2022-05-19T16:02:33+08:00” level=fatal msg=“getting status of runtime: rpc error: code = Unimplemented desc = unknown service runtime.v1alpha2.RuntimeService”
 端口占用错误：
   sudo lsof -i:8081 //查看被占用端口
kill -9 pid //pid杀死端口
 文件存在错误：rm -rf 文件
 [ERROR DirAvailable--var-lib-etcd]: /var/lib/etcd is not empty //删除该文件
 在master节点运行以下三行命令 执行完成后可以通过 kubeadm token list获取token
 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

 9.安装网络插件(此处会发生dns解析错误在/etc/hosts文件中重定向域名
 185.199.109.133 raw.githubusercontent.com)
 kubectl apply –f
https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-
flannel.yml
 10.向k8s集群中添加节点
 kubeadm join 192.168.197.168:6443 --token usmphm.018gei3h7fd2zey7 \
        --discovery-token-ca-cert-hash sha256:561785321d0305d65def82ab00a09e3a4b3db08c990cc62484d6396b2cd9d224

 11.在 Kubernetes 集群中创建一个 pod，验证是否正常运行：
 $ kubectl create deployment nginx --image=nginx
$ kubectl expose deployment nginx --port=80 --type=NodePort
$ kubectl get pod,svc
 访问地址：http://NodeIP:Port
 如果出现容器无法初始化状态（ContainerCreating）执行：
 kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/2140ac876ef134e0ed5af15c65e414cf26827915/Documentation/kube-flannel.yml

资讯详情

k8s安装部署

k8s部署