virtual-service-route-controller

README

Virtual Service Route Controller

Construct Istio VirtualService resource from some components.

✍ This is study about custom controller.

Usage

1. Create VirtualServiceBase resource.

$ cat <<EOF | kubectl apply -f -
apiVersion: virtualservicecomponent.shibataka000.com/v1alpha1
kind: VirtualServiceBase
metadata:
  name: virtualservicebase-sample
spec:
  gateways:
  - gateway
  hosts:
  - '*'
EOF

1. Create HTTPRouteBinding resources.

$ cat <<EOF | kubectl apply -f -
apiVersion: virtualservicecomponent.shibataka000.com/v1alpha1
kind: HTTPRouteBinding
metadata:
  name: httproutebinding-sample-1
spec:
  virtualServiceBaseRef:
    apiVersion: virtualservicecomponent.shibataka000.com/v1alpha1
    kind: VirtualServiceBase
    name: virtualservicebase-sample
    namespace: default
  httpRoute:
    match:
    - headers:
        key:
          exact: mysubset-1
    route:
    - destination:
        host: myhost
        subset: mysubset-1
EOF

$ cat <<EOF | kubectl apply -f -
apiVersion: virtualservicecomponent.shibataka000.com/v1alpha1
kind: HTTPRouteBinding
metadata:
  name: httproutebinding-sample-2
spec:
  virtualServiceBaseRef:
    apiVersion: virtualservicecomponent.shibataka000.com/v1alpha1
    kind: VirtualServiceBase
    name: virtualservicebase-sample
    namespace: default
  httpRoute:
    match:
    - headers:
        key:
          exact: mysubset-2
    route:
    - destination:
        host: myhost
        subset: mysubset-2
EOF

1. VirtualServiceRouteController construct VirtualService resource from VirtualServiceBase and HTTPRouteBinding . You can see created resource as follows.

$ kubectl get virtualservices.networking.istio.io virtualservicebase-sample -o yaml
apiVersion: networking.istio.io/v1beta1
kind: VirtualService
metadata:
  name: virtualservicebase-sample
  namespace: default
spec:
  gateways:
  - gateway
  hosts:
  - '*'
  http:
  - match:
    - headers:
        key:
          exact: mysubset-1
    route:
    - destination:
        host: myhost
        subset: mysubset-1
  - match:
    - headers:
        key:
          exact: mysubset-2
    route:
    - destination:
        host: myhost
        subset: mysubset-2

Requirement

• Istio

Install

1. Deploy Istio to your kubernetes cluster. See Setup more details.
2. Deploy VirtualServiceRouteController and CRDs to your kubernetes cluster.

TBD