ingress部署

# 手动部署
# 部署ingress-nginx 官方地址：https://github.com/kubernetes/ingress-nginx
# 参考链接：https://www.jianshu.com/p/c726ed03562a
wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/mandatory.yaml
# 修改mandatory.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 "-"
      # Here: "-"
      # 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: extensions/v1beta1
kind: DaemonSet
metadata:
  name: nginx-ingress-controller
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
spec:
  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:
      hostNetwork: true
      dnsPolicy: ClusterFirstWithHostNet
      nodeSelector:
        nginx-ingress: "true"
      tolerations:
        - key: "node-role.kubernetes.io/master"
          operator: "Exists"
          effect: "NoSchedule"
      serviceAccountName: nginx-ingress-serviceaccount
      containers:
        - name: nginx-ingress-controller
          image: registry.cn-hangzhou.aliyuncs.com/google_containers/nginx-ingress-controller:0.25.0
          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 -> 33
            runAsUser: 33
          env:
            - name: POD_NAME
              valueFrom:
                fieldRef:
                  fieldPath: metadata.name
            - name: POD_NAMESPACE
              valueFrom:
                fieldRef:
                  fieldPath: metadata.namespace
          ports:
            - name: http
              containerPort: 80
            - name: https
              containerPort: 443
          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

---
##########################################
修改参数:
1、image修改为阿里云镜像registry.cn-hangzhou.aliyuncs.com/google_containers/nginx-ingress-controller:0.25.0
2、kind修改为DaemonSet,apiVersion修改为extensions/v1beta1
3、replicas: 1 #删除此行，DaemonSet不需要此参数
4、hostNetwork: true #添加该字段让docker使用物理机网络，在物理机暴露服务端口(80)，注意物理机80端口提前不能被占用
5、dnsPolicy: ClusterFirstWithHostNet #使用hostNetwork后容器会使用物理机网络包括DNS，会无法解析内部service，使用此参数让容器使用K8S的DNS
6、nginx-ingress: "true" #添加节点标签
7、tolerations: 添加对指定节点污点容忍度

# 创建ingress-ingress的service
[root@test-k8s-master01 ~]# cat svc-ingress-nginx.yaml 
##########################################
kind: Service
apiVersion: v1
metadata:
  name: ingress-nginx
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
spec:
  selector:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
  ports:
    - name: http
      port: 80
      targetPort: http
    - name: https
      port: 443
      targetPort: https
##########################################
kubectl apply -f svc-ingress-nginx.yaml

# 节点打上标签、污点
# 查看标签
kubectl get node --show-labels
# 打标签
kubectl label nodes test-k8s-master01 nginx-ingress=true
# 删除标签
kubectl label nodes test-k8s-master01 nginx-ingress-
# 查看污点
kubectl describe node test-k8s-master01
# 打污点
kubectl taint nodes test-k8s-master01 nginx-ingress=true:NoSchedule
# 删除污点
kubectl taint nodes test-k8s-master01 nginx-ingress:NoSchedule-

# 创建资源
kubectl apply -f mandatory.yaml
kubectl get pod -n ingress-nginx -o wide

# helm方式部署
helm fetch stable/nginx-ingress
tar xf nginx-ingress-1.17.0.tgz
nginx-ingress 目录下面的values.yaml文件为默认参数值
# 自定义参数
[root@test-k8s-master01 nginx-ingress]# cat custom.yaml 
######################################
controller:
  replicaCount: 3
  image:
    repository: quay.io/kubernetes-ingress-controller/nginx-ingress-controller
  hostNetwork: true
  daemonset:
    useHostPort: false
    hostPorts:
      http: 80
      https: 443
  service:
    type: ClusterIP
  tolerations:
    - operator: "Exists"
  nodeSelector:
    nginx-ingress: "true"

defaultBackend:
  replicaCount: 1
  image:
    repository: gcr.azk8s.cn/google-containers/defaultbackend-amd64
  tolerations:
    - operator: "Exists"
  nodeSelector:
    nginx-ingress: "true"
######################################
helm install stable/nginx-ingress --namespace nginx-ingress --name nginx-ingress -f custom.yaml

#其它参考：https://www.cnblogs.com/wenlin-gk/p/9627403.html
https://www.cnblogs.com/crazymagic/p/11267303.html
https://blog.csdn.net/bbwangj/article/details/82940419