istio.io/archive/v1.21/docs/setup/additional-setup/gateway/snips.sh

#!/bin/bash
# shellcheck disable=SC2034,SC2153,SC2155,SC2164

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# Licensed under the Apache License, Version 2.0 (the "License");
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#
#    http://www.apache.org/licenses/LICENSE-2.0
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# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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####################################################################################################
# WARNING: THIS IS AN AUTO-GENERATED FILE, DO NOT EDIT. PLEASE MODIFY THE ORIGINAL MARKDOWN FILE:
#          docs/setup/additional-setup/gateway/index.md
####################################################################################################

! IFS=$'\n' read -r -d '' snip_deploying_a_gateway_1 <<\ENDSNIP
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
ENDSNIP

snip_deploying_a_gateway_2() {
kubectl create namespace istio-ingress
istioctl install --set values.pilot.env.PILOT_ENABLE_CONFIG_DISTRIBUTION_TRACKING=true -f ingress.yaml
}

snip_deploying_a_gateway_3() {
kubectl create namespace istio-ingress
helm install istio-ingressgateway istio/gateway -n istio-ingress
}

snip_deploying_a_gateway_4() {
helm install istio-ingressgateway istio/gateway -n istio-ingress -f manifests/charts/gateway/openshift-values.yaml
}

! IFS=$'\n' read -r -d '' snip_deploying_a_gateway_5 <<\ENDSNIP
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
ENDSNIP

snip_deploying_a_gateway_6() {
kubectl create namespace istio-ingress
kubectl apply -f ingress.yaml
}

! IFS=$'\n' read -r -d '' snip_gateway_selectors_1 <<\ENDSNIP
apiVersion: networking.istio.io/v1beta1
kind: Gateway
metadata:
  name: gateway
spec:
  selector:
    istio: ingressgateway
...
ENDSNIP

! IFS=$'\n' read -r -d '' snip_canary_upgrade_advanced_1 <<\ENDSNIP
apiVersion: apps/v1
kind: Deployment
metadata:
  name: istio-ingressgateway-canary
  namespace: istio-ingress
spec:
  selector:
    matchLabels:
      istio: ingressgateway
  template:
    metadata:
      annotations:
        inject.istio.io/templates: gateway
      labels:
        istio: ingressgateway
        istio.io/rev: canary # Set to the control plane revision you want to deploy
    spec:
      containers:
      - name: istio-proxy
        image: auto
ENDSNIP

snip_canary_upgrade_advanced_2() {
kubectl get endpoints -n istio-ingress -o "custom-columns=NAME:.metadata.name,PODS:.subsets[*].addresses[*].targetRef.name"
}

! IFS=$'\n' read -r -d '' snip_canary_upgrade_advanced_2_out <<\ENDSNIP
NAME                   PODS
istio-ingressgateway   istio-ingressgateway-...,istio-ingressgateway-canary-...
ENDSNIP

snip_cleanup_1() {
istioctl uninstall --istioNamespace istio-ingress -y --purge
kubectl delete ns istio-ingress
}