k8s安装ingress

忘是亡心i 2022-10-11 00:49 318阅读 0赞

版本介绍

组件    版本  
k8s    v1.18  
ingress    0.30.0  
1. 下载两个文件

https://github.com/kubernetes/ingress-nginx/blob/nginx-0.30.0/deploy/static/mandatory.yaml
    https://github.com/kubernetes/ingress-nginx/blob/nginx-0.30.0/deploy/baremetal/service-nodeport.yaml

apiVersion: v1
    kind: Namespace
    metadata:
      name: ingress-nginx
      labels:
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
    
    ---
    
    kind: ConfigMap
    apiVersion: v1
    metadata:
      name: nginx-configuration
      namespace: ingress-nginx
      labels:
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
    
    ---
    kind: ConfigMap
    apiVersion: v1
    metadata:
      name: tcp-services
      namespace: ingress-nginx
      labels:
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
    
    ---
    kind: ConfigMap
    apiVersion: v1
    metadata:
      name: udp-services
      namespace: ingress-nginx
      labels:
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
    
    ---
    apiVersion: v1
    kind: ServiceAccount
    metadata:
      name: nginx-ingress-serviceaccount
      namespace: ingress-nginx
      labels:
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
    
    ---
    apiVersion: rbac.authorization.k8s.io/v1beta1
    kind: ClusterRole
    metadata:
      name: nginx-ingress-clusterrole
      labels:
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
    rules:
      - apiGroups:
          - ""
        resources:
          - configmaps
          - endpoints
          - nodes
          - pods
          - secrets
        verbs:
          - list
          - watch
      - apiGroups:
          - ""
        resources:
          - nodes
        verbs:
          - get
      - apiGroups:
          - ""
        resources:
          - services
        verbs:
          - get
          - list
          - watch
      - apiGroups:
          - ""
        resources:
          - events
        verbs:
          - create
          - patch
      - apiGroups:
          - "extensions"
          - "networking.k8s.io"
        resources:
          - ingresses
        verbs:
          - get
          - list
          - watch
      - apiGroups:
          - "extensions"
          - "networking.k8s.io"
        resources:
          - ingresses/status
        verbs:
          - update
    
    ---
    apiVersion: rbac.authorization.k8s.io/v1beta1
    kind: Role
    metadata:
      name: nginx-ingress-role
      namespace: ingress-nginx
      labels:
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
    rules:
      - apiGroups:
          - ""
        resources:
          - configmaps
          - pods
          - secrets
          - namespaces
        verbs:
          - get
      - apiGroups:
          - ""
        resources:
          - configmaps
        resourceNames:
          # Defaults to "<election-id>-<ingress-class>"
          # Here: "<ingress-controller-leader>-<nginx>"
          # This has to be adapted if you change either parameter
          # when launching the nginx-ingress-controller.
          - "ingress-controller-leader-nginx"
        verbs:
          - get
          - update
      - apiGroups:
          - ""
        resources:
          - configmaps
        verbs:
          - create
      - apiGroups:
          - ""
        resources:
          - endpoints
        verbs:
          - get
    
    ---
    apiVersion: rbac.authorization.k8s.io/v1beta1
    kind: RoleBinding
    metadata:
      name: nginx-ingress-role-nisa-binding
      namespace: ingress-nginx
      labels:
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
    roleRef:
      apiGroup: rbac.authorization.k8s.io
      kind: Role
      name: nginx-ingress-role
    subjects:
      - kind: ServiceAccount
        name: nginx-ingress-serviceaccount
        namespace: ingress-nginx
    
    ---
    apiVersion: rbac.authorization.k8s.io/v1beta1
    kind: ClusterRoleBinding
    metadata:
      name: nginx-ingress-clusterrole-nisa-binding
      labels:
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
    roleRef:
      apiGroup: rbac.authorization.k8s.io
      kind: ClusterRole
      name: nginx-ingress-clusterrole
    subjects:
      - kind: ServiceAccount
        name: nginx-ingress-serviceaccount
        namespace: ingress-nginx
    
    ---
    
    apiVersion: apps/v1
    kind: Deployment
    metadata:
      name: nginx-ingress-controller
      namespace: ingress-nginx
      labels:
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
    spec:
      replicas: 1
      selector:
        matchLabels:
          app.kubernetes.io/name: ingress-nginx
          app.kubernetes.io/part-of: ingress-nginx
      template:
        metadata:
          labels:
            app.kubernetes.io/name: ingress-nginx
            app.kubernetes.io/part-of: ingress-nginx
          annotations:
            prometheus.io/port: "10254"
            prometheus.io/scrape: "true"
        spec:
          # wait up to five minutes for the drain of connections
          terminationGracePeriodSeconds: 300
          serviceAccountName: nginx-ingress-serviceaccount
          nodeSelector:
            kubernetes.io/os: linux
          containers:
            - name: nginx-ingress-controller
              image: quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.30.0
              args:
                - /nginx-ingress-controller
                - --configmap=$(POD_NAMESPACE)/nginx-configuration
                - --tcp-services-configmap=$(POD_NAMESPACE)/tcp-services
                - --udp-services-configmap=$(POD_NAMESPACE)/udp-services
                - --publish-service=$(POD_NAMESPACE)/ingress-nginx
                - --annotations-prefix=nginx.ingress.kubernetes.io
              securityContext:
                allowPrivilegeEscalation: true
                capabilities:
                  drop:
                    - ALL
                  add:
                    - NET_BIND_SERVICE
                # www-data -> 101
                runAsUser: 101
              env:
                - name: POD_NAME
                  valueFrom:
                    fieldRef:
                      fieldPath: metadata.name
                - name: POD_NAMESPACE
                  valueFrom:
                    fieldRef:
                      fieldPath: metadata.namespace
              ports:
                - name: http
                  containerPort: 80
                  protocol: TCP
                - name: https
                  containerPort: 443
                  protocol: TCP
              livenessProbe:
                failureThreshold: 3
                httpGet:
                  path: /healthz
                  port: 10254
                  scheme: HTTP
                initialDelaySeconds: 10
                periodSeconds: 10
                successThreshold: 1
                timeoutSeconds: 10
              readinessProbe:
                failureThreshold: 3
                httpGet:
                  path: /healthz
                  port: 10254
                  scheme: HTTP
                periodSeconds: 10
                successThreshold: 1
                timeoutSeconds: 10
              lifecycle:
                preStop:
                  exec:
                    command:
                      - /wait-shutdown
    
    ---
    
    apiVersion: v1
    kind: LimitRange
    metadata:
      name: ingress-nginx
      namespace: ingress-nginx
      labels:
        app.kubernetes.io/name: ingress-nginx
        app.kubernetes.io/part-of: ingress-nginx
    spec:
      limits:
        - min:
            memory: 90Mi
            cpu: 100m
          type: Container

apiVersion: v1
    kind: Service
    metadata:
      name: ingress-nginx
    spec:
      type: NodePort
      ports:
        - name: http
          port: 80
          targetPort: 80
          protocol: TCP
        - name: https
          port: 443
          targetPort: 443
          protocol: TCP
      externalTrafficPolicy: Cluster

2. 在k8smaster节点执行

kubectl apply -f mandatory.yaml
    kubectl apply -f service-nodeport.yaml

镜像下载可能会比较慢，请使用更快下镜像源。

可以使用以下命令修改为更快的源：

curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://f1361db2.m.daocloud.io

修改后可以使用docker pull 命令下载好镜像再在k8s上安装ingress，在mandatory.yaml中可以找到镜像地址：

quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.30.0

耐心等待。。。

3 完成  
安装完成后k8s上会新增一个命名空间 ingress-nginx, 空间里有一个pods ： nginx-ingress-controller

[root@worker2 k8s-ingress]# kubectl get pods -n ingress-nginx -o wide
    NAME                                        READY   STATUS              RESTARTS   AGE   IP       NODE      NOMINATED NODE   READINESS GATES
    nginx-ingress-controller-65886f4f5d-fjgwn   0/1     ContainerCreating   0          42s   <none>   worker1   <none>           <none>
    [root@worker2 k8s-ingress]#