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配置以下VirtualService资源定义。如果http header里包含end-user且其值为jason则路由到v2版本reviews，否则访问v1版本reviews
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: reviews
namespace: istio-bookinfo
spec:
hosts:
- reviews
http:
- match:
- headers:
end-user:
exact: jason
route:
- destination:
host: reviews
subset: v2
- route:
- destination:
host: reviews
subset: v1施加virtualservice定义之后的envoy route配置
"routes": [
{
"match": {
"prefix": "/",
"caseSensitive": true,
"headers": [
{
"name": "end-user",
"exactMatch": "jason"
}
]
},
"route": {
"cluster": "outbound|9080|v2|reviews.istio-bookinfo.svc.cluster.local",
"timeout": "0s",
"retryPolicy": {
"retryOn": "connect-failure,refused-stream,unavailable,cancelled,retriable-status-codes",
"numRetries": 2,
"retryHostPredicate": [
{
"name": "envoy.retry_host_predicates.previous_hosts"
}
],
"hostSelectionRetryMaxAttempts": "5",
"retriableStatusCodes": [
503
]
},
"maxGrpcTimeout": "0s"
},
"metadata": {
"filterMetadata": {
"istio": {
"config": "/apis/networking.istio.io/v1alpha3/namespaces/istio-bookinfo/virtual-service/reviews"
}
}
},
"decorator": {
"operation": "reviews.istio-bookinfo.svc.cluster.local:9080/*"
}
},
{
"match": {
"prefix": "/"
},
"route": {
"cluster": "outbound|9080|v1|reviews.istio-bookinfo.svc.cluster.local",
"timeout": "0s",
"retryPolicy": {
"retryOn": "connect-failure,refused-stream,unavailable,cancelled,retriable-status-codes",
"numRetries": 2,
"retryHostPredicate": [
{
"name": "envoy.retry_host_predicates.previous_hosts"
}
],
"hostSelectionRetryMaxAttempts": "5",
"retriableStatusCodes": [
503
]
},
"maxGrpcTimeout": "0s"
},
"metadata": {
"filterMetadata": {
"istio": {
"config": "/apis/networking.istio.io/v1alpha3/namespaces/istio-bookinfo/virtual-service/reviews"
}
}
},
"decorator": {
"operation": "reviews.istio-bookinfo.svc.cluster.local:9080/*"
}
}
],
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