istio

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apiVersion: gateway.networking.k8s.io/v1beta1
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kind: GatewayClass
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metadata:
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  name: istio
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spec:
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  controllerName: istio.io/gateway-controller
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---
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apiVersion: gateway.networking.k8s.io/v1beta1
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kind: Gateway
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metadata:
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  name: third-party-gateway
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  namespace: istio-system
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spec:
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  addresses:
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  - value: istio-ingressgateway
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    type: Hostname
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  gatewayClassName: third-party-gatewayclass
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  listeners:
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  - name: default
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    hostname: "*.domain.example"
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    port: 80
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    protocol: HTTP
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    allowedRoutes:
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      namespaces:
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        from: All
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---
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apiVersion: gateway.networking.k8s.io/v1beta1
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kind: Gateway
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metadata:
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  name: gateway
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  namespace: istio-system
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  annotations:
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    gateway.istio.io/alias-for: third-party-gateway
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spec:
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  addresses:
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  - value: istio-ingressgateway
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    type: Hostname
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  gatewayClassName: istio
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  listeners:
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  - name: default
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    hostname: "*.domain.example"
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    port: 80
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    protocol: HTTP
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    allowedRoutes:
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      namespaces:
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        from: All
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---
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apiVersion: gateway.networking.k8s.io/v1beta1
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kind: HTTPRoute
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metadata:
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  name: http
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  namespace: default
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spec:
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  parentRefs:
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  - name: third-party-gateway
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    namespace: istio-system
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  hostnames: ["first.domain.example", "another.domain.example"]
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  rules:
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  - matches:
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    - path:
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        type: PathPrefix
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        value: /
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    backendRefs:
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    - name: httpbin
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      port: 80
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