upgrade: serving updated to v0.19

Author: kameshsampath

documentation/modules/serving/pages/_partials/invoke-service.adoc

@@ -11,7 +11,7 @@
 [.console-input]
 [source,bash,subs="+macros,+attributes"]
 ----
-http http://greeter.{tutorial-namespace}.{minikube-nip-io}
+http $(kn service describe greeter -n {tutorial-namespace} -o url)
 ----
 
 #end::call[]

documentation/modules/serving/pages/scaling.adoc

@@ -41,28 +41,8 @@ After the deployment of the service was successful we should see a Kubernetes de
 
 [#scaling-invoke-service]
 == Invoke Service
-ifndef::workshop[]
-[tabs]
-====
-Minikube::
-+
---
-include::serving:partial$invoke-service.adoc[tags=**;!workshop-call;!workshop-call-params]
 
---
-OpenShift::
-+
---
-include::serving:partial$invoke-service.adoc[tags=workshop-call]
---
-====
-endif::[]
-
-ifdef::workshop[]
---
-include::serving:partial$invoke-service.adoc[tags=workshop-call]
---
-endif::[]
+include::serving:partial$invoke-service.adoc[tags=**;!workshop-call;!workshop-call-params]
 
 The last `http` command should return a response like:
 
@@ -130,45 +110,15 @@ include::serving:partial$watch-scaling-pods.adoc[]
 
 We will now send some load to the greeter service.  The command below sends 50 concurrent requests (`-c 50`) for the next 10s (`-z 10s`)
 
-ifndef::workshop[]
-[tabs]
-====
-Minikube::
-+
---
-[#scaling-run-siege]
-[.console-input]
-[source,bash,subs="attributes+,+macros",linenums]
-----
-hey -c 50 -z 10s \
-  "http://prime-generator.{tutorial-namespace}.{minikube-nip-io}/?sleep=3&upto=10000&memload=100"
-----
---
-OpenShift::
-+
---
-[#oc-scaling-run-siege]
-[.console-input]
-[source,bash,subs="attributes+,+macros",linenums]
-----
-export SVC_URL=`{kubernetes-cli} get rt prime-generator -o yaml | yq read - 'status.url'`
-
-hey -c 50 -z 10s \
-  "pass:[${SVC_URL}]/?sleep=3&upto=10000&memload=100"
-----
---
-====
-endif::[]
-
 [#oc-scaling-run-siege]
 [.console-input]
 [source,bash,subs="attributes+,+macros",linenums]
 ----
-export SVC_URL=`{kubernetes-cli} get rt prime-generator -o yaml | yq read - 'status.url'`
-hey -c 50 -z 10s "pass:[${SVC_URL}]/?sleep=3&upto=10000&memload=100"
+export SVC_URL=$(kn service describe prime-generator -n{tutorial-namespace} -url)
+hey -c 50 -z 10s "pass:[$SVC_URL]/?sleep=3&upto=10000&memload=100"
 ----
 
-After you've successfully run this small load test, you will notice the number of greeter service pods will have scaled to *5* automatically. 
+After you've successfully run this small load test, you will notice the number of greeter service pods will have scaled to *5* or more pods automatically. 
 
 The autoscale pods is computed using the formula:
 
@@ -215,7 +165,7 @@ Let us send some load to the service to trigger autoscaling:
 [.console-input]
 [source,bash,subs="attributes+,+macros",linenums]
 ----
-hey -c 50 -z 10s "pass:[${SVC_URL}]/?sleep=3&upto=10000&memload=100"
+hey -c 50 -z 10s "pass:[$SVC_URL]/?sleep=3&upto=10000&memload=100"
 ----
 
 When all requests are done and if we are beyond the `scale-to-zero-grace-period`, we will notice that Knative has terminated only 3 out 5 pods. This is because we have configured Knative to always run two pods via the annotation `autoscaling.knative.dev/minScale: "2"`.

documentation/modules/serving/pages/traffic-distribution.adoc

@@ -187,7 +187,7 @@ Updating Service 'blue-green-canary' in namespace 'knativetutorial':
   0.303s Ready to serve.
 
 Service 'blue-green-canary' with latest revision 'blue-green-canary-yzrwq-2' (unchanged) is available at URL:
-http://blue-green-canary.knativetutorial.192.168.64.29.nip.io
+http://blue-green-canary.knativetutorial.192.168.64.13.nip.io
 ----
 
 === Tag Green
@@ -211,7 +211,7 @@ Updating Service 'blue-green-canary' in namespace 'knativetutorial':
   0.303s Ready to serve.
 
 Service 'blue-green-canary' with latest revision 'blue-green-canary-yzrwq-2' (unchanged) is available at URL:
-http://blue-green-canary.knativetutorial.192.168.64.29.nip.io
+http://blue-green-canary.knativetutorial.192.168.64.13.nip.io
 ----
 
 == Tag Latest
@@ -235,7 +235,7 @@ Updating Service 'blue-green-canary' in namespace 'knativetutorial':
   0.303s Ready to serve.
 
 Service 'blue-green-canary' with latest revision 'blue-green-canary-yzrwq-2' (unchanged) is available at URL:
-http://blue-green-canary.knativetutorial.192.168.64.29.nip.io
+http://blue-green-canary.knativetutorial.192.168.64.13.nip.io
 ----
 
 Let us query the Service Revisions again,
@@ -318,9 +318,9 @@ The above command should return you three sub-routes for the main `greeter` rout
 
 [source,bash,subs="+macros,attributes"]
 ----
-http://latest-blue-green-canary.knativetutorial.192.168.64.29.nip.io #<.>
-http://blue-blue-green-canary.knativetutorial.192.168.64.29.nip.io #<.>
-http://green-blue-green-canary.knativetutorial.192.168.64.29.nip.io  #<.>
+http://latest-blue-green-canary.knativetutorial.192.168.64.13.nip.io #<.>
+http://blue-blue-green-canary.knativetutorial.192.168.64.13.nip.io #<.>
+http://green-blue-green-canary.knativetutorial.192.168.64.13.nip.io  #<.>
 ----
 
 <1> the sub route for the traffic tag `latest`