istio

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apiVersion: networking.istio.io/v1alpha3
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kind: ServiceEntry
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metadata:
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  name: websocket-extsvc
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  namespace: testns
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spec:
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   hosts:
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   - websocket.test.istio.io
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   ports:
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   - number: 9002
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     name: http
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     protocol: HTTP
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   resolution: STATIC
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   endpoints:
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    - address: 127.0.0.2
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      ports:
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        http: 7072
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      labels:
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        version: v1
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---
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apiVersion: networking.istio.io/v1alpha3
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kind: DestinationRule
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metadata:
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  name: websocket
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  namespace: testns
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spec:
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  host: websocket.test.istio.io
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  subsets:
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    - name: v1
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      labels:
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        version: v1
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---
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apiVersion: networking.istio.io/v1alpha3
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kind: VirtualService
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metadata:
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  name: websocket-route
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  namespace: testns
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spec:
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  hosts:
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    - websocket.test.istio.io
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  http:
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    - match:
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      - headers:
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          testwebsocket:
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            exact: enabled
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      route:
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      - destination:
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          host: websocket.test.istio.io
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          subset: v1
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          port:
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            number: 9002
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      websocketUpgrade: true
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---
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apiVersion: networking.istio.io/v1alpha3
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kind: VirtualService
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metadata:
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  name: websocket-route2
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  namespace: testns
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spec:
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  hosts:
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    - websocket2.extsvc.com
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  http:
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    - match:
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      - headers:
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          testwebsocket:
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            exact: enabled
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      route:
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      - destination:
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          host: websocket.test.istio.io
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          subset: v1
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          port:
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            number: 9002
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      websocketUpgrade: true
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