istio

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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: all
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  namespace: testns
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spec:
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  hosts:
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  - service3.default.svc.cluster.local
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  - uk.bookinfo.com
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  - eu.bookinfo.com
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  gateways:
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  - my-gateway
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  - mesh # applies to all the sidecars in the mesh
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  http:
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  - match:
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    - headers:
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        cookie:
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          regex: "^(.*?;)?(user=dev-123)(;.*)?"
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    route:
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    - destination:
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        port:
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          number: 81
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        host: service3.default.svc.cluster.local
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  - match:
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    - uri:
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        prefix: /reviews/
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    route:
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    - destination:
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        port:
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          number: 81
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        host: service3.default.svc.cluster.local
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        subset: v1
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      weight: 80
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    - destination:
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        host: service3.default.svc.cluster.local
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        subset: v2
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      weight: 20
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