安装 Gateway

首先设置名为 ingress.yaml 的 IstioOperator 配置文件：

apiVersion: install.istio.io/v1alpha1
kind: IstioOperator
metadata:
  name: ingress
spec:
  profile: empty # Do not install CRDs or the control plane
  components:
    ingressGateways:
    - name: istio-ingressgateway
      namespace: istio-ingress
      enabled: true
      label:
        # Set a unique label for the gateway. This is required to ensure Gateways
        # can select this workload
        istio: ingressgateway
  values:
    gateways:
      istio-ingressgateway:
        # Enable gateway injection
        injectionTemplate: gateway

然后使用标准的 istioctl 命令安装：

$ kubectl create namespace istio-ingress
$ istioctl install -f ingress.yaml

使用标准的 helm 命令安装：

$ kubectl create namespace istio-ingress
$ helm install istio-ingressgateway istio/gateway -n istio-ingress

要查看支持的所有可能的配置值，请运行 helm show values istio/gateway。 Helm 代码仓库中的 README 包含了更多使用信息。

首先设置名为 ingress.yaml 的 Kubernetes 配置文件：

apiVersion: v1
kind: Service
metadata:
  name: istio-ingressgateway
  namespace: istio-ingress
spec:
  type: LoadBalancer
  selector:
    istio: ingressgateway
  ports:
  - port: 80
    name: http
  - port: 443
    name: https
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: istio-ingressgateway
  namespace: istio-ingress
spec:
  selector:
    matchLabels:
      istio: ingressgateway
  template:
    metadata:
      annotations:
        # Select the gateway injection template (rather than the default sidecar template)
        inject.istio.io/templates: gateway
      labels:
        # Set a unique label for the gateway. This is required to ensure Gateways can select this workload
        istio: ingressgateway
        # Enable gateway injection. If connecting to a revisioned control plane, replace with "istio.io/rev: revision-name"
        sidecar.istio.io/inject: "true"
    spec:
      # Allow binding to all ports (such as 80 and 443)
      securityContext:
        sysctls:
        - name: net.ipv4.ip_unprivileged_port_start
          value: "0"
      containers:
      - name: istio-proxy
        image: auto # The image will automatically update each time the pod starts.
        # Drop all privileges, allowing to run as non-root
        securityContext:
          capabilities:
            drop:
            - ALL
          runAsUser: 1337
          runAsGroup: 1337
---
# Set up roles to allow reading credentials for TLS
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: istio-ingressgateway-sds
  namespace: istio-ingress
rules:
- apiGroups: [""]
  resources: ["secrets"]
  verbs: ["get", "watch", "list"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: istio-ingressgateway-sds
  namespace: istio-ingress
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: istio-ingressgateway-sds
subjects:
- kind: ServiceAccount
  name: default

接下来将其应用到集群：

$ kubectl create namespace istio-ingress
$ kubectl apply -f ingress.yaml