k8s部署

最新推荐文章于 2023-05-04 14:57:34 发布

原创最新推荐文章于 2023-05-04 14:57:34 发布 · 371 阅读

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1、环境

docker2：172.25.27.102	manager,node
docker3：172.25.27.103	node
docker4：172.25.27.104	node

2、安装

docker2,docker3,docker4

(1)关闭swap
swapoff -a
selinux设置为disabled
vim /etc/fstab

    关闭火墙/让火墙允许服务通过
    安装
(2)、下载软件包，注意版本
yum源位置：阿里yum源
cri-tools-1.13.0-0.x86_64.rpm  kubelet-1.15.0-0.x86_64.rpm
kubeadm-1.15.0-0.x86_64.rpm    kubernetes-cni-0.7.5-0.x86_64.rpm
kubectl-1.15.0-0.x86_64.rpm
Yum install -y *

(3)、导入镜像

    coredns.tar etcd.tar
    kube-apiserver.tar kube-controller-manager.tar
    kube-proxy.tar kube-scheduler.tar
    pause.tar

    For i in *.tar; do docker load -i $i ; done

(4)、使iptables生效
    vim /etc/sysctl.d/k8s.conf
        net.bridge.bridge-nf-call-ip6tables = 1
        net.bridge.bridge-nf-call-iptables = 1
    sysctl --system    重读文件，使生效

3、集群搭建

主节点docker2初始化kubeadm
    kubeadm init --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=172.25.17.102
    报错:timeout
    解决方法：
        kubeadm reset        重置，重新执行初始化

其它节点加入集群，docker3，docker4加入集群
    kubeadm join 172.25.17.102:6443 --token zbrnwl.cshxdc8k8kuucvhi     --discovery-token-ca-cert-hash sha256:fed31a5092861e88e0035d9b943b5f34fb21b1c3b207f5c26e1709aa213cd2b7

主节点建立用户并授权管理集群
    useradd kube
    vim /etc/sudoers    
        kube ALL=(ALL)       NOPASSWD:ALL
    su - kube
    授权kube用户管理集群
        mkdir -p $HOME/.kube
        sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
        sudo chown $(id -u):$(id -g) $HOME/.kube/config
    查看集群状态
        kubectl get nodes
            NAME      STATUS   ROLES    AGE    VERSION
            docker2   Ready    master   147m   v1.15.0
            docker3   Ready    <none>   147m   v1.15.0
            docker4   Ready    <none>   146m   v1.15.0
        kubectl get pods --all-namespaces    查看节点命名空间
        kubectl get pods -n kube-system -owide    查看详细的信息
            
        problem：The connection to the server localhost:8080 was refused - did you specify the right host or port?
        解决方法：执行创建用户和授权

注：net.ipv4.ip_forward = 1

sysctl -a| grep ip_forward

vim /etc/sysctl.conf

sysctl -p

4、UI部署

1）、部署

docker2,docker3,docker4导入镜像
kubernetes-dashboard.tar flannel.tar

补全命令

echo "source <(kubectl completion bash)" >> .bashrc
docker2的yaml文件部署服务
kubectl create -f kubernetes-dashboard.yaml

kubectl create -f kube-flannel.yml

kubectl edit service kubernetes-dashboard -n kube-system 修改 kubernetes-dashboard服务：type : NodePort，方便访问

kubectl describe svc kubernetes-dashboard -n kube-system 查看kubernetes-dashboard服务信息

Name:                     kubernetes-dashboard
Namespace:                kube-system
Labels:                   k8s-app=kubernetes-dashboard
Annotations:              <none>
Selector:                 k8s-app=kubernetes-dashboard
Type:                     NodePort
IP:                       10.108.214.77
Port:                     <unset>  443/TCP
TargetPort:               8443/TCP
NodePort:                 <unset>  32675/TCP
Endpoints:                10.244.0.3:8443
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>

访问：https://172.25.27.102:32675 查看界面

2）、登陆

vim /home/kube/dashboard-admin.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin-user
  namespace: kube-system

---

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: admin-user
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: admin-user
  namespace: kube-system

kubectl create -f kubernetes-admin.yaml

kubectl get secrets -n kube-system | grep admin

admin-user-token-zrs8s                           kubernetes.io/service-account-token   3      106m

kubectl describe secrets admin-user-token-zrs8s -n kube-system 获取token

Name:         admin-user-token-zrs8s
Namespace:    kube-system
Labels:       <none>
Annotations:  kubernetes.io/service-account.name: admin-user
              kubernetes.io/service-account.uid: 37c52860-8fcd-45a5-b2d7-ffc94875af04

Type:  kubernetes.io/service-account-token

Data
====
ca.crt:     1025 bytes
namespace:  11 bytes
token:      eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJrdWJlLXN5c3RlbSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VjcmV0Lm5hbWUiOiJhZG1pbi11c2VyLXRva2VuLXpyczhzIiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZXJ2aWNlLWFjY291bnQubmFtZSI6ImFkbWluLXVzZXIiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiIzN2M1Mjg2MC04ZmNkLTQ1YTUtYjJkNy1mZmM5NDg3NWFmMDQiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6a3ViZS1zeXN0ZW06YWRtaW4tdXNlciJ9.K90mfJkMGFIEyv6-T86ENgaLzueFnBuCJ-kDEDvVbOo4yiKtgfYgdyzsdcGdxQj1IfLs-aiRVuogX7tWu69bu2Am1-9xfH4wx_TsivT-xGB4j3KMeyYbeCrtGjyf1PKq3JXzuFR51X77aQdn9M9GqnM4j96j5TyzGIdSpInRid3ov1FbrLYfEELv93DpJdOiCWZ7CL5woSaL31Fl0X-KczKRjrRLQ7Ib7iyV3ZWDV5Mf1sn0wXSRhOwpiGN11RolXKqB9VfEcJcgmJNLqrWW7K6zoKLrYON7zuloEsAEbrYSxa6gQPl7W9k3OW1SFb3NI2FGGcf3tG6KnMkMuKwH9A