运行 Knative Serving demo 应用

创建 ns

# kubectl create ns knative-demo

namespace/knative-demo created

创建应用

hello-world.yaml

apiVersion: serving.knative.dev/v1
kind: Service
metadata:
  name: helloworld-go
  namespace: knative-demo
spec:
  template:
    spec:
      containers:
        - image: ghcr.dockerproxy.com/knative/helloworld-go:latest
          env:
            - name: TARGET
              value: "Go Sample v1"

创建资源

# kubectl apply -f hello-word.yaml

service.serving.knative.dev/hello created

查看资源

查看 Pod

# kubectl get svc,deployment,pods -n knative-demo

NAME                                  TYPE           CLUSTER-IP       EXTERNAL-IP                                        PORT(S)                                              AGE
service/helloworld-go                 ExternalName   <none>           knative-local-gateway.istio-system.svc.wgs.local   80/TCP                                               46s
service/helloworld-go-00001           ClusterIP      10.100.172.219   <none>                                             80/TCP,443/TCP                                       47s
service/helloworld-go-00001-private   ClusterIP      10.100.7.170     <none>                                             80/TCP,443/TCP,9090/TCP,9091/TCP,8022/TCP,8012/TCP   48s

NAME                                             READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/helloworld-go-00001-deployment   1/1     1            1           48s

NAME                                                 READY   STATUS    RESTARTS   AGE
pod/helloworld-go-00001-deployment-5c44fdc68-njv7n   2/2     Running   0          48s

查看 configuration

# kubectl get configurations -n knative-demo

NAME            LATESTCREATED         LATESTREADY           READY   REASON
helloworld-go   helloworld-go-00001   helloworld-go-00001   True   

查看 revision

# kubectl get revisions -n knative-demo

NAME                  CONFIG NAME     K8S SERVICE NAME   GENERATION   READY   REASON   ACTUAL REPLICAS   DESIRED REPLICAS
helloworld-go-00001   helloworld-go                      1            True             0                 0

查看 kpa

# kubectl get kpa -n knative-demo

NAME                  DESIREDSCALE   ACTUALSCALE   READY   REASON
helloworld-go-00001   0              0             False   NoTraffic

查看 route

# kubectl get rt -n knative-demo

NAME            URL                                               READY   REASON
helloworld-go   http://helloworld-go.knative-demo.svc.wgs.local   True    

查看pods 为0时的后端地址

# kubectl describe svc helloworld-go-00001 -n knative-demo

Name:              helloworld-go-00001
Namespace:         knative-demo
Labels:            app=helloworld-go-00001
                   networking.internal.knative.dev/serverlessservice=helloworld-go-00001
                   networking.internal.knative.dev/serviceType=Public
                   serving.knative.dev/configuration=helloworld-go
                   serving.knative.dev/configurationGeneration=1
                   serving.knative.dev/configurationUID=2260454d-f6a2-476f-b290-5355ecdad002
                   serving.knative.dev/revision=helloworld-go-00001
                   serving.knative.dev/revisionUID=4b8e3a5a-c1b0-42dc-b04c-99434084b427
                   serving.knative.dev/service=helloworld-go
                   serving.knative.dev/serviceUID=a0801880-c5fc-4544-ab81-1226a3f35ca9
Annotations:       autoscaling.knative.dev/class: kpa.autoscaling.knative.dev
                   serving.knative.dev/creator: admin
Selector:          <none>
Type:              ClusterIP
IP Family Policy:  SingleStack
IP Families:       IPv4
IP:                10.100.172.219
IPs:               10.100.172.219
Port:              http  80/TCP
TargetPort:        8012/TCP
Endpoints:         172.20.154.221:8012  # activator pod地址
Port:              https  443/TCP
TargetPort:        8112/TCP
Endpoints:         172.20.154.221:8112
Session Affinity:  None
Events:            <none>

查看 ingress 地址

# kubectl --namespace istio-system get service istio-ingressgateway

NAME                   TYPE           CLUSTER-IP       EXTERNAL-IP       PORT(S)                                      AGE
istio-ingressgateway   LoadBalancer   10.100.132.184   192.168.174.249   15021:31063/TCP,80:56051/TCP,443:33148/TCP   40m

查看 istio ingress 路由信息

# istioctl proxy-config all istio-ingressgateway-568ffb9976-lk455 -n istio-system |grep helloworld-go

helloworld-go-00001-private.knative-demo.svc.wgs.local           80        -          outbound      EDS            
helloworld-go-00001-private.knative-demo.svc.wgs.local           443       -          outbound      EDS            
helloworld-go-00001-private.knative-demo.svc.wgs.local           8012      -          outbound      EDS            
helloworld-go-00001-private.knative-demo.svc.wgs.local           8022      -          outbound      EDS            
helloworld-go-00001-private.knative-demo.svc.wgs.local           9090      -          outbound      EDS            
helloworld-go-00001-private.knative-demo.svc.wgs.local           9091      -          outbound      EDS            
helloworld-go-00001.knative-demo.svc.wgs.local                   80        -          outbound      EDS            
helloworld-go-00001.knative-demo.svc.wgs.local                   443       -          outbound      EDS            
helloworld-go.knative-demo.svc.wgs.local                         80        -          outbound      STRICT_DNS     
http.8081     helloworld-go.knative-demo.svc.wgs.local:8081     helloworld-go.knative-demo.svc.wgs.local, helloworld-go.knative-demo.wgs.com + 1 more...     /*                     helloworld-go-ingress.knative-demo
http.8081     helloworld-go.knative-demo.svc.wgs.local:8081     helloworld-go.knative-demo.svc.wgs.local, helloworld-go.knative-demo.wgs.com + 1 more...     /*                     helloworld-go-ingress.knative-demo
http.8080     helloworld-go.knative-demo.svc.wgs.local:80       helloworld-go.knative-demo.svc.wgs.local, helloworld-go.knative-demo.wgs.com + 1 more...     /*                     helloworld-go-ingress.knative-demo
http.8080     helloworld-go.knative-demo.svc.wgs.local:80       helloworld-go.knative-demo.svc.wgs.local, helloworld-go.knative-demo.wgs.com + 1 more...     /*                     helloworld-go-ingress.knative-demo

集群内部访问应用

创建测试 pod

# kubectl run client --image=ikubernetes/admin-box -it --rm --restart=Never --command -n default -- /bin/bash

If you don't see a command prompt, try pressing enter.
root@client /# 

 内部访问应用

# curl http://helloworld-go.knative-demo.svc.wgs.local

Hello Go Sample v1!

集群外部访问应用

设置 DNS

# kubectl patch configmap/config-domain       --namespace knative-serving       --type merge       --patch '{"data":{"wgs.com":""}}'

查看 rt

# kubectl get rt -n knative-demo

NAME            URL                                         READY   REASON
helloworld-go   http://helloworld-go.knative-demo.wgs.com   True    

外部访问应用

# curl -H "Host: helloworld-go.knative-demo.wgs.com" http://192.168.174.249

Hello Go Sample v1!