Platform engineering example: bitnamilegacy images, steps fixes; fix kubeconfig retriever

- steps.txt: add step to copy kubeplus-saas-provider.json into example dir
- custom-mysql-1.0-10.1.0.tgz: use bitnamilegacy images so MySQL pods pull
- kubeconfigretriever.py: single-quote jsonpath, handle double-encoded ConfigMap, guard dict access

Author: anniegracehu

examples/multitenancy/platform-engineering/custom-mysql-1.0-10.1.0.tgz

@@ -32,6 +32,8 @@ Platform Engineering team
      $ helm install kubeplus "https://github.com/cloud-ark/operatorcharts/blob/master/kubeplus-chart-4.2.0.tgz?raw=true" --kubeconfig=kubeplus-saas-provider.json 
    - Wait till KubePlus Pod is Running
      $ kubectl get pods -A
+   - Copy the provider kubeconfig into this directory so the commands below work (run from this directory):
+     $ cp ../../../kubeplus-saas-provider.json .
 
 4. Create CustomMysqlService API wrapping the Helm chart:
    - Check custom-mysql-service-composition-localchart.yaml. Notice that we are specifying our custom mysql chart

examples/multitenancy/platform-engineering/steps.txt

@@ -11,9 +11,9 @@ def retrieve_kubeconfig(self, serverURL, kubeconfigFor, kubeconfig):
 
 		kubeplusNS = self.get_kubeplus_namespace(kubeconfig)
 		if kubeconfigFor == 'provider':
-			cmd = "kubectl get configmaps kubeplus-saas-provider -n " + kubeplusNS + r" -o jsonpath=\"{.data.kubeplus-saas-provider\.json}\""
+			cmd = "kubectl get configmaps kubeplus-saas-provider -n " + kubeplusNS + r" -o jsonpath='{.data.kubeplus-saas-provider\.json}'"
 		if kubeconfigFor == 'consumer':
-			cmd = "kubectl get configmaps kubeplus-saas-consumer-kubeconfig -n " + kubeplusNS + r" -o jsonpath=\"{.data.kubeplus-saas-consumer\.json}\""			
+			cmd = "kubectl get configmaps kubeplus-saas-consumer-kubeconfig -n " + kubeplusNS + r" -o jsonpath='{.data.kubeplus-saas-consumer\.json}'"			
 
 		#kubeconfigParts = kubeconfig.split("=")
 		#kubeconfigPath = kubeconfigParts[1].strip()