k8s-ingress安装

一、编写nginx-ingress-controller.yaml文件

apiVersion: extensions/v1beta1

kind: Deployment

metadata:

  name: default-http-backend

  labels:

    k8s-app: default-http-backend

  namespace: kube-system

spec:

  replicas: 1

  template:

    metadata:

      labels:

        k8s-app: default-http-backend

    spec:

      terminationGracePeriodSeconds: 60

      containers:

      - name: default-http-backend

        # Any image is permissable as long as:

        # 1. It serves a 404 page at /

        # 2. It serves 200 on a /healthz endpoint

        image: gcr.io/google_containers/defaultbackend:1.0

        livenessProbe:

          httpGet:

            path: /healthz

            port: 8080

            scheme: HTTP

          initialDelaySeconds: 30

          timeoutSeconds: 5

        ports:

        - containerPort: 8080

        resources:

          limits:

            cpu: 10m

            memory: 20Mi

          requests:

            cpu: 10m

            memory: 20Mi

---

apiVersion: v1

kind: Service

metadata:

  name: default-http-backend

  namespace: kube-system

  labels:

    k8s-app: default-http-backend

spec:

  ports:

  - port: 80

    targetPort: 8080

  selector:

    k8s-app: default-http-backend

---

apiVersion: extensions/v1beta1

kind: Deployment

metadata:

  name: nginx-ingress-controller

  labels:

    k8s-app: nginx-ingress-controller

  namespace: kube-system

spec:

  replicas: 1

  template:

    metadata:

      labels:

        k8s-app: nginx-ingress-controller

    spec:

      # hostNetwork makes it possible to use ipv6 and to preserve the source IP correctly regardless of docker configuration

      # however, it is not a hard dependency of the nginx-ingress-controller itself and it may cause issues if port 10254 already is taken on the host

      # that said, since hostPort is broken on CNI (https://github.com/kubernetes/kubernetes/issues/31307) we have to use hostNetwork where CNI is used

      # like with kubeadm

      serviceAccountName: nginx-ingress-serviceaccount

      hostNetwork: true

      terminationGracePeriodSeconds: 60

      containers:

      - image: gcr.io/google_containers/nginx-ingress-controller:0.9.0-beta.11

        name: nginx-ingress-controller

        readinessProbe:

          httpGet:

            path: /healthz

            port: 10254

            scheme: HTTP

        livenessProbe:

          httpGet:

            path: /healthz

            port: 10254

            scheme: HTTP

          initialDelaySeconds: 10

          timeoutSeconds: 1

        ports:

        - containerPort: 80

          hostPort: 80

        - containerPort: 443

          hostPort: 443

        env:

          - name: POD_NAME

            valueFrom:

              fieldRef:

                fieldPath: metadata.name

          - name: POD_NAMESPACE

            valueFrom:

              fieldRef:

                fieldPath: metadata.namespace

        args:

        - /nginx-ingress-controller

        - --default-backend-service=$(POD_NAMESPACE)/default-http-backend

二、编写rbac.yaml文件（创建服务账户，赋予nginx-controller的kubernetes api访问权限）

apiVersion: v1

kind: ServiceAccount

metadata:

  name: nginx-ingress-serviceaccount

  namespace: kube-system

 

---

 

apiVersion: rbac.authorization.k8s.io/v1beta1

kind: ClusterRole

metadata:

  name: nginx-ingress-clusterrole

rules:

  - apiGroups:

      - ""

    resources:

      - configmaps

      - endpoints

      - nodes

      - pods

      - secrets

    verbs:

      - list

      - watch

  - apiGroups:

      - ""

    resources:

      - nodes

    verbs:

      - get

  - apiGroups:

      - ""

    resources:

      - services

    verbs:

      - get

      - list

      - watch

  - apiGroups:

      - "extensions"

    resources:

      - ingresses

    verbs:

      - get

      - list

      - watch

  - apiGroups:

      - ""

    resources:

        - events

    verbs:

        - create

        - patch

  - apiGroups:

      - "extensions"

    resources:

      - ingresses/status

    verbs:

      - update

 

---

 

apiVersion: rbac.authorization.k8s.io/v1beta1

kind: Role

metadata:

  name: nginx-ingress-role

  namespace: kube-system

rules:

  - apiGroups:

      - ""

    resources:

      - configmaps

      - pods

      - secrets

      - namespaces

    verbs:

      - get

  - apiGroups:

      - ""

    resources:

      - configmaps

    resourceNames:

      - "ingress-controller-leader-nginx"

    verbs:

      - get

      - update

  - apiGroups:

      - ""

    resources:

      - configmaps

    verbs:

      - create

  - apiGroups:

      - ""

    resources:

      - endpoints

    verbs:

      - get

      - create

 

---

 

apiVersion: rbac.authorization.k8s.io/v1beta1

kind: RoleBinding

metadata:

  name: nginx-ingress-role-nisa-binding

  namespace: kube-system

roleRef:

  apiGroup: rbac.authorization.k8s.io

  kind: Role

  name: nginx-ingress-role

subjects:

  - kind: ServiceAccount

    name: nginx-ingress-serviceaccount

    namespace: kube-system

 

---

 

apiVersion: rbac.authorization.k8s.io/v1beta1

kind: ClusterRoleBinding

metadata:

  name: nginx-ingress-clusterrole-nisa-binding

roleRef:

  apiGroup: rbac.authorization.k8s.io

  kind: ClusterRole

  name: nginx-ingress-clusterrole

subjects:

  - kind: ServiceAccount

    name: nginx-ingress-serviceaccount

    namespace: kube-system

三、由于文件中使用到grc镜像，需要更改tag标签（可使用脚本或直接运行）

docker pull anjia0532/google-containers.defaultbackend:1.0

docker pull anjia0532/google-containers.nginx-ingress-controller:0.9.0-beta.11

docker tag anjia0532/google-containers.defaultbackend:1.0 gcr.io/google_containers/defaultbackend:1.0

docker tag anjia0532/google-containers.nginx-ingress-controller:0.9.0-beta.11 gcr.io/google_containers/nginx-ingress-controller:0.9.0-beta.11

四、安装步骤

kubectl apply -f ./*.yaml #注意此目录下只能包含刚刚新建的2分yaml文件，避免引起其他错误

kubectl get pod -n kubesystem -o wide #查看新建的pod状态（此pod可能出现在任意node节点，若master节点不允许创建pod，则一定不会在master上

五、创建ingress指定service便可以使用（参考k8s-service部分）

参考链接：https://blog.csdn.net/xingyuzhe/article/details/80979974