Knative serving基础
[root@master basic]# kubectl apply -f hello-world.yaml
[root@master basic]# cat hello-world.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
name: hello
spec:
template:
metadata:
# This is the name of our new "Revision," it must follow the convention {service-name}-{revision-name}
name: hello-world
spec:
containers:
#- image: gcr.io/knative-samples/helloworld-go
- image: ikubernetes/helloworld-go
ports:
- containerPort: 8080
env:
- name: TARGET
value: "World"查看下状态和service
[root@master basic]# kn service list
NAME URL LATEST AGE CONDITIONS READY REASON
demoapp http://demoapp.default.example.com demoapp-00001 128m 3 OK / 3 True
hello http://hello.default.example.com hello-world 2m51s 3 OK / 3 True
[root@master basic]# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
demoapp ExternalName <none> knative-local-gateway.istio-system.svc.cluster.local 80/TCP 129m
demoapp-00001 ClusterIP 10.111.131.8 <none> 80/TCP,443/TCP 129m
demoapp-00001-private ClusterIP 10.98.248.135 <none> 80/TCP,443/TCP,9090/TCP,9091/TCP,8022/TCP,8012/TCP 129m
hello ExternalName <none> knative-local-gateway.istio-system.svc.cluster.local 80/TCP 2m6s
hello-world ClusterIP 10.99.49.105 <none> 80/TCP,443/TCP 3m
hello-world-private ClusterIP 10.104.110.111 <none> 80/TCP,443/TCP,9090/TCP,9091/TCP,8022/TCP,8012/TCP 3m
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 21d查看deployment和kpa和pods，如果没有访问pods会为0
[root@master basic]# kubectl get deployment
NAME READY UP-TO-DATE AVAILABLE AGE
demoapp-00001-deployment 0/0 0 0 133m
hello-world-deployment 1/1 1 1 7m29s
[root@master basic]# kubectl get kpa
NAME DESIREDSCALE ACTUALSCALE READY REASON
demoapp-00001 -1 0 False NoTraffic
hello-world 1 1 True
[root@master basic]# kubectl get pods
NAME READY STATUS RESTARTS AGE
hello-world-deployment-7bb7b4c4c9-jvpc4 3/3 Running 0 22s显示服务完整信息
[root@master basic]# kn service list hello -o yaml查看hello的基本状态
[root@master basic]# kn service describe hello
Name: hello
Namespace: default
Age: 13m
URL: http://hello.default.example.com
Revisions:
100% @latest (hello-world) [1] (13m)
Image: ikubernetes/helloworld-go (at 5ea96b)
Replicas: 0/0
Conditions:
OK TYPE AGE REASON
++ Ready 12m
++ ConfigurationsReady 12m
++ RoutesReady 12m 更新hello
[root@master basic]# kubectl apply -f hello-world-002.yaml
[root@master basic]# cat hello-world-002.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
name: hello
spec:
template:
metadata:
# This is the name of our new "Revision," it must follow the convention {service-name}-{revision-name}
name: hello-world-002
spec:
containerConcurrency: 10
containers:
#- image: gcr.io/knative-samples/helloworld-go
- image: ikubernetes/helloworld-go
ports:
- containerPort: 8080
env:
- name: TARGET
value: "World-002"
[root@master basic]# kn service list
NAME URL LATEST AGE CONDITIONS READY REASON
demoapp http://demoapp.default.example.com demoapp-00001 145m 3 OK / 3 True
hello http://hello.default.example.com hello-world 19m 1 OK / 3 Unknown
[root@master basic]# kn service describe hello
Name: hello
Namespace: default
Age: 19m
URL: http://hello.default.example.com
Revisions:
100% @latest (hello-world-002) [2] (33s)
Image: ikubernetes/helloworld-go (at 5ea96b)
Replicas: 1/1
Conditions:
OK TYPE AGE REASON
++ Ready 26s
++ ConfigurationsReady 27s
++ RoutesReady 26s
[root@master basic]# kn revision list
NAME SERVICE TRAFFIC TAGS GENERATION AGE CONDITIONS READY REASON
demoapp-00001 demoapp 100% 1 146m 3 OK / 4 True
hello-world-002 hello 100% 2 51s 4 OK / 4 True
hello-world hello 1 20m 3 OK / 4 True
[root@master basic]# curl -H "Host: hello.default.example.com" 10.211.55.30
Hello World-002!更新KService资源，副本数量最大数为10最小为1
[root@master basic]# kn service update hello --env TARGET=knative --scale-max=10 --scale-min=1 --revision-name=hello-knative
Updating Service 'hello' in namespace 'default':
0.029s The Configuration is still working to reflect the latest desired specification.
7.202s Traffic is not yet migrated to the latest revision.
7.248s Ingress has not yet been reconciled.
7.293s Waiting for load balancer to be ready
7.484s Ready to serve.
Service 'hello' updated to latest revision 'hello-knative' is available at URL:
http://hello.default.example.com查看revision
[root@master basic]# kn revision list
NAME SERVICE TRAFFIC TAGS GENERATION AGE CONDITIONS READY REASON
demoapp-00001 demoapp 100% 1 156m 3 OK / 4 True
hello-knative hello 100% 3 61s 4 OK / 4 True
hello-world-002 hello 2 10m 3 OK / 4 True
hello-world hello 1 29m 3 OK / 4 True 查看service
[root@master basic]# kn service list
NAME URL LATEST AGE CONDITIONS READY REASON
demoapp http://demoapp.default.example.com demoapp-00001 156m 3 OK / 3 True
hello http://hello.default.example.com hello-knative 30m 3 OK / 3 True 直接curl访问进行测试
[root@master basic]# curl -H "Host: hello.default.example.com" 10.211.55.30
Hello knative!删除service
[root@master basic]# kn service delete demoapp
Service 'demoapp' successfully deleted in namespace 'default'.
添加域名映射
[root@master domainmapping]# kubectl apply -f cdc-hello.ik8s.io.yaml
clusterdomainclaim.networking.internal.knative.dev/hello.ik8s.io created
[root@master domainmapping]# kubectl get cdc
NAME AGE
hello.ik8s.io 4s
[root@master domainmapping]# kn domain create hello.ik8s.io --ref ksvc:hello
Domain mapping 'hello.ik8s.io' created in namespace 'default'.
[root@master domainmapping]# kn domain list
NAME URL READY KSVC
hello.ik8s.io http://hello.ik8s.io True hello
[root@master domainmapping]# curl -H "Host: hello.ik8s.io" 10.211.55.30
Hello knative!
[root@master domainmapping]# curl -H "Host: hello.ik8s.io" 10.211.55.30
Hello knative!域名映射，自动化创建CDC
autocreate-cluster-domain-claims: "true"
[root@master domainmapping]# kubectl edit cm config-network -n knative-serving
[root@master domainmapping]# kn domain create www.ik8s.io --ref ksvc:hello:default
Domain mapping 'www.ik8s.io' created in namespace 'default'.
[root@master domainmapping]# kn domain list
NAME URL READY KSVC
hello.ik8s.io http://hello.ik8s.io True hello
www.ik8s.io http://www.ik8s.io True hello
[root@master domainmapping]# kubectl get cdc
NAME AGE
hello.ik8s.io 3h23m
www.ik8s.io 64s
Revision和流量管理
配置Private Kservice仅创建私有服务的方法
域名映射不会被阻断，外部名称会被阻断
[root@master domainmapping]# kubectl get vs
NAME GATEWAYS HOSTS AGE
hello-ingress ["knative-serving/knative-ingress-gateway","knative-serving/knative-local-gateway"] ["hello.default","hello.default.svc","hello.default.svc.cluster.local","hello.default.yang.com"] 22h
hello-mesh ["mesh"] ["hello.default","hello.default.svc","hello.default.svc.cluster.local"] 22h
hello.ik8s.io-ingress ["knative-serving/knative-ingress-gateway"] ["hello.ik8s.io"] 3h45m
www.ik8s.io-ingress ["knative-serving/knative-ingress-gateway"] ["www.ik8s.io"] 25m
[root@master domainmapping]# kubectl label kservice hello networking.knative.dev/visibility=cluster-local
service.serving.knative.dev/hello labeled
[root@master domainmapping]# kubectl get vs
NAME GATEWAYS HOSTS AGE
hello-ingress ["knative-serving/knative-local-gateway"] ["hello.default","hello.default.svc","hello.default.svc.cluster.local"] 22h
hello-mesh ["mesh"] ["hello.default","hello.default.svc","hello.default.svc.cluster.local"] 22h
hello.ik8s.io-ingress ["knative-serving/knative-ingress-gateway"] ["hello.ik8s.io"] 3h47m
www.ik8s.io-ingress ["knative-serving/knative-ingress-gateway"] ["www.ik8s.io"] 27m
[root@master domainmapping]# curl -H "Host: hello.ik8s.io" 10.211.55.30
Hello knative!
[root@master domainmapping]# curl -H "Host: www.ik8s.io" 10.211.55.30
Hello knative!
[root@master domainmapping]# curl -H "Host: hello.default.yang.com" 10.211.55.30把标签删除掉就又可以访问到了
[root@master domainmapping]# kubectl label kservice hello networking.knative.dev/visibility-
service.serving.knative.dev/hello unlabeled
[root@master domainmapping]# kubectl get vs
NAME GATEWAYS HOSTS AGE
hello-ingress ["knative-serving/knative-ingress-gateway","knative-serving/knative-local-gateway"] ["hello.default","hello.default.svc","hello.default.svc.cluster.local","hello.default.yang.com"] 22h
hello-mesh ["mesh"] ["hello.default","hello.default.svc","hello.default.svc.cluster.local"] 22h
hello.ik8s.io-ingress ["knative-serving/knative-ingress-gateway"] ["hello.ik8s.io"] 4h10m
www.ik8s.io-ingress ["knative-serving/knative-ingress-gateway"] ["www.ik8s.io"] 50m
[root@master domainmapping]# curl -H "Host: hello.default.yang.com" 10.211.55.30
Hello knative!人为切换流量分发比例
[root@master revision-and-route]# kn revision list
NAME SERVICE TRAFFIC TAGS GENERATION AGE CONDITIONS READY REASON
hello-knative hello 100% 3 22h 4 OK / 4 True
hello-world-002 hello 2 22h 3 OK / 4 True
hello-world hello 1 23h 3 OK / 4 True
[root@master revision-and-route]# kn service update hello --traffic hello-world=100
Updating Service 'hello' in namespace 'default':
0.037s The Route is still working to reflect the latest desired specification.
0.115s Ingress has not yet been reconciled.
0.143s Waiting for load balancer to be ready
0.339s Ready to serve.
Service 'hello' with latest revision 'hello-knative' (unchanged) is available at URL:
http://hello.default.yang.com
[root@master revision-and-route]# kn revision list
NAME SERVICE TRAFFIC TAGS GENERATION AGE CONDITIONS READY REASON
hello-knative hello 3 22h 3 OK / 4 True
hello-world-002 hello 2 22h 3 OK / 4 True
hello-world hello 100% 1 23h 3 OK / 4 True
[root@master revision-and-route]# kn service describe hello
Name: hello
Namespace: default
Age: 23h
URL: http://hello.default.yang.com
Revisions:
+ hello-knative (current @latest) [3] (22h)
Image: ikubernetes/helloworld-go (at 5ea96b)
Replicas: 0/0
100% hello-world [1] (23h)
Image: ikubernetes/helloworld-go (at 5ea96b)
Conditions:
OK TYPE AGE REASON
++ Ready 25s
++ ConfigurationsReady 22h
++ RoutesReady 25s
[root@master revision-and-route]# kn service update hello --traffic hello-world=90 --traffic hello-world-002=9 --traffic hello-knative=1
Updating Service 'hello' in namespace 'default':
0.035s The Route is still working to reflect the latest desired specification.
0.099s Ingress has not yet been reconciled.
0.153s Waiting for load balancer to be ready
0.426s Ready to serve.
Service 'hello' with latest revision 'hello-knative' (unchanged) is available at URL:
http://hello.default.yang.com
[root@master revision-and-route]# kn service describe hello
Name: hello
Namespace: default
Age: 23h
URL: http://hello.default.yang.com
Revisions:
1% hello-knative (current @latest) [3] (22h)
Image: ikubernetes/helloworld-go (at 5ea96b)
Replicas: 1/1
9% hello-world-002 [2] (22h)
Image: ikubernetes/helloworld-go (at 5ea96b)
90% hello-world [1] (23h)
Image: ikubernetes/helloworld-go (at 5ea96b)
Conditions:
OK TYPE AGE REASON
++ Ready 5s
++ ConfigurationsReady 22h
++ RoutesReady 5s
[root@master revision-and-route]# kn revision list
NAME SERVICE TRAFFIC TAGS GENERATION AGE CONDITIONS READY REASON
hello-knative hello 1% 3 22h 4 OK / 4 True
hello-world-002 hello 9% 2 22h 3 OK / 4 True
hello-world hello 90% 1 23h 3 OK / 4 True
[root@master revision-and-route]# while true; do curl -H "Host: hello.default.yang.com" 10.211.55.30; sleep .2; done打tag，然后可以根据tag去访问
[root@master ~]# kn service update hello --tag hello-world-002=green
Updating Service 'hello' in namespace 'default':
0.024s The Route is still working to reflect the latest desired specification.
0.148s Ingress has not yet been reconciled.
0.182s Waiting for load balancer to be ready
0.362s Ready to serve.
Service 'hello' with latest revision 'hello-knative' (unchanged) is available at URL:
http://hello.default.yang.com
[root@master ~]# kn service update hello --tag hello-world=blue
Updating Service 'hello' in namespace 'default':
0.033s The Route is still working to reflect the latest desired specification.
0.076s Ingress has not yet been reconciled.
0.128s Waiting for load balancer to be ready
0.312s Ready to serve.
Service 'hello' with latest revision 'hello-knative' (unchanged) is available at URL:
http://hello.default.yang.com
[root@master ~]# kubectl get vs
NAME GATEWAYS HOSTS AGE
hello-ingress ["knative-serving/knative-ingress-gateway","knative-serving/knative-local-gateway"] ["blue-hello.default","blue-hello.default.svc","blue-hello.default.svc.cluster.local","blue-hello.default.yang.com","green-hello.default","green-hello.default.svc","green-hello.default.svc.cluster.local","green-hello.default.yang.com","hello.default","hello.default.svc","hello.default.svc.cluster.local","hello.default.yang.com"] 23h
hello-mesh ["mesh"] ["blue-hello.default","blue-hello.default.svc","blue-hello.default.svc.cluster.local","green-hello.default","green-hello.default.svc","green-hello.default.svc.cluster.local","hello.default","hello.default.svc","hello.default.svc.cluster.local"] 23h
hello.ik8s.io-ingress ["knative-serving/knative-ingress-gateway"] ["hello.ik8s.io"] 4h43m
www.ik8s.io-ingress ["knative-serving/knative-ingress-gateway"] ["www.ik8s.io"] 83m
[root@master ~]# curl -H "Host: green-hello.default.yang.com" 10.211.55.30
Hello World-002!
[root@master ~]# curl -H "Host: green-hello.default.yang.com" 10.211.55.30
Hello World-002!
[root@master ~]# curl -H "Host: blue-hello.default.yang.com" 10.211.55.30
Hello World!
[root@master ~]# curl -H "Host: blue-hello.default.yang.com" 10.211.55.30
Hello World!
# 删除tag
[root@master ~]# kn service update hello --untag blue
Updating Service 'hello' in namespace 'default':
0.044s The Route is still working to reflect the latest desired specification.
0.101s Ingress has not yet been reconciled.
0.137s Waiting for load balancer to be ready
0.339s Ready to serve.
Service 'hello' with latest revision 'hello-knative' (unchanged) is available at URL:
http://hello.default.yang.com
配置实例并发测试
[root@master autoscaling]# kubectl apply -f autoscaling-concurrency.yaml
[root@master autoscaling]# cat autoscaling-concurrency.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
name: hello
namespace: default
spec:
template:
metadata:
annotations:
autoscaling.knative.dev/target-utilization-percentage: "60"
autoscaling.knative.dev/target: "10"
spec:
containers:
- image: ikubernetes/helloworld-go
ports:
- containerPort: 8080
env:
- name: TARGET
value: "Knative Autoscaling Concurrency"
[root@master autoscaling]# kn service list
NAME URL LATEST AGE CONDITIONS READY REASON
hello http://hello.default.yang.com hello-00001 3m7s 3 OK / 3 True
[root@master autoscaling]# curl -H "Host: hello.default.yang.com" 10.211.55.30
Hello Knative Autoscaling Concurrency!我们安装一个hey压测工具，我是mac，直接brew install hey
执行压测命令
hey -c 20 -z 60s -host "hello.default.yang.com" http://10.211.55.30?sleep=100&prime=10000&bloat=5可以看到hello的pod会迅速扩容
配置revision的扩容边界，最大不超过3个pod
[root@master autoscaling]# kubectl apply -f autoscaling-scale-bounds.yaml
[root@master autoscaling]# cat autoscaling-scale-bounds.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
name: hello
namespace: default
spec:
template:
metadata:
annotations:
autoscaling.knative.dev/target-utilization-percentage: "60"
autoscaling.knative.dev/target: "10"
autoscaling.knative.dev/max-scale: "3"
autoscaling.knative.dev/initial-scale: "1"
autoscaling.knative.dev/scale-down-delay: "1m"
autoscaling.knative.dev/stable-window: "60s"
spec:
containers:
- image: ikubernetes/helloworld-go
ports:
- containerPort: 8080
env:
- name: TARGET
value: "Knative Autoscaling Scale Bounds"继续压力测试
hey -c 20 -z 60s -host "hello.default.yang.com" 'http://10.211.55.30?sleep=100&prime=10000&bloat=5'
rps测试，实例会扩展至多个，但最多不超过10个
[root@master autoscaling]# kubectl apply -f autoscaling-metrics-and-targets.yaml
service.serving.knative.dev/hello created
[root@master autoscaling]# kn service list
NAME URL LATEST AGE CONDITIONS READY REASON
hello http://hello.default.yang.com hello-00001 5s 3 OK / 3 True
[root@master autoscaling]# kubectl get pods
NAME READY STATUS RESTARTS AGE
hello-00001-deployment-74bc458559-hb6pp 3/3 Running 0 4s
[root@master autoscaling]# cat autoscaling-metrics-and-targets.yaml
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
name: hello
namespace: default
spec:
template:
metadata:
annotations:
autoscaling.knative.dev/target-utilization-percentage: "60"
autoscaling.knative.dev/metric: "rps"
autoscaling.knative.dev/target: "100"
autoscaling.knative.dev/max-scale: "10"
autoscaling.knative.dev/initial-scale: "1"
autoscaling.knative.dev/stable-window: "2m"
spec:
containers:
- image: ikubernetes/helloworld-go
ports:
- containerPort: 8080
env:
- name: TARGET
value: "Knative Autoscaling Metrics and Targets"
