feat: Upgrade to Knative v0.19

- Use Knative Serving v0.19
- Use Knative Eventing v0.19
- Minikube updated to v1.17.1
- Use OpenShift 4.6

Author: kameshsampath

documentation/modules/setup/pages/_attributes.adoc

@@ -1,5 +1,5 @@
 :moduledir: ..
-:github-repo: https://github.com/redhat-developer-demos/knative-tutorial/blob/{branch}
+:github-repo: {repo-base}/blob/{branch}
 :basics-repo: serving
 :configs-and-routes-repo: configs-and-routes
 :scaling-repo: scaling

documentation/modules/setup/pages/minikube.adoc

@@ -17,11 +17,11 @@ $TUTORIAL_HOME/bin/start-minikube.sh
 [.console-output]
 [source,bash,subs="+macros,+attributes"]
 ----
-😄  [{tutorial-namespace}] minikube {minikube-version} on Darwin 10.15.7
+😄  [{tutorial-namespace}] minikube {minikube-version} on Darwin 11.1
 ✨  Using the hyperkit driver based on user configuration
 👍  Starting control plane node {tutorial-namespace} in cluster {tutorial-namespace}
 🔥  Creating hyperkit VM (CPUs=6, Memory=8192MB, Disk=51200MB) ...
-🐳  Preparing Kubernetes v1.18.0 on Docker 19.03.12 ...
+🐳  Preparing Kubernetes {kubernetes-version} on Docker 20.10.2 ...
     > kubelet.sha256: 65 B / 65 B [--------------------------] 100.00% ? p/s 0s
     > kubectl.sha256: 65 B / 65 B [--------------------------] 100.00% ? p/s 0s
     > kubeadm.sha256: 65 B / 65 B [--------------------------] 100.00% ? p/s 0s
@@ -201,8 +201,7 @@ A successful Kourier Ingress Gateway should show the following pods in `kourier-
 [.console-input]
 [source,bash,subs="+quotes,+attributes,+macros"]
 ----
-kubectl get pods --all-namespaces -l 'app in(3scale-kourier-gateway,3scale-kourier-cont
-rol)'
+kubectl get pods --all-namespaces -l 'app in(3scale-kourier-gateway,3scale-kourier-control)'
 ----
 
 [.console-output]
@@ -303,7 +302,7 @@ Configure Knative to use the `kourier-ingress` Gateway:
 [.console-input]
 [source,bash,subs="+macros,+attributes"]
 ----
-ksvc_domain="\"data\":{\""$(minikube ip)".nip.io\": \"\"}"
+ksvc_domain="\"data\":{\""$(minikube -p {tutorial-namespace} ip)".nip.io\": \"\"}"
 kubectl patch configmap/config-domain \
     -n knative-serving \
     --type merge \

documentation/modules/setup/pages/openshift.adoc

@@ -1,6 +1,7 @@
 [#install-knative-openshift]
 = OpenShift
 include::_attributes.adoc[]
+:hardbreaks-option:
 
 Knative Serving and Eventing install needs OpenShift4, you need to have one provisioned using https://try.openshift.com[try.openshift.com] or can use any existing OpenShift4 cluster.
 
@@ -13,19 +14,20 @@ Once you have your cluster, you can download the latest OpenShift client(oc) fro
 oc version 
 ----
 
-The output should show oc version >=4.5
+The output should show oc version >= {openshift-version}
 
 [.console-output]
-[source,bash]
+[source,bash,subs="+macros,+attributes"]
 ----
-Client Version: 4.5.8
-Kubernetes Version: v1.18.2-0-g52c56ce
+Client Version: 4.6.9
+Kubernetes Version: {kubernetes-version}
 ----
 
-[IMPORTANT]
-=====
-Please follow the https://docs.openshift.com/container-platform/4.3/serverless/installing_serverless/installing-openshift-serverless.html[OpenShift] documentation, to have Knative components installed on your cluster.
-=====
+ 
+
+video::eOwJjC9u4aM[youtube,width=640,height=480]
+
+For more information on OpenShift Servertless, consult the https://docs.openshift.com/container-platform/4.6/serverless/installing_serverless/installing-openshift-serverless.html[OpenShift^] documentation.
 
 **Navigate to tutorial project**