Fix platform engineering example and kubeconfig retriever (#1452)

* Fix kubeconfigretriever: raw string for jsonpath, handle double-encoded ConfigMap value

* 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

* Remove commented-out code in kubeconfigretriever.py

* Trigger CI

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

@@ -11,32 +11,29 @@ 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 + " -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 + " -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()
 		cmd = cmd + " --kubeconfig=" + kubeconfig
 		out = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True).communicate()[0]
-		#print(out)
 		out = out.decode('utf-8')
 		json_output = {}
 		try:
 			json_output = json.loads(out)
+			if isinstance(json_output, str):
+				json_output = json.loads(json_output)
 		except Exception as e:
 			print(e)
 			print("KubePlus might not be ready yet. Try again once the KubePlus Pod is running.")
-		if serverURL != '-1':
-			#parts = serverURL.split("=")
-			#sURL = parts[1].strip()
-			#if sURL != '':
-			json_output["clusters"][0]["cluster"]["server"] = serverURL
-		try:
-			pkubeconfig = json.dumps(json_output)
-			print(pkubeconfig)
-		except Exception as e:
-			print(e)
+		if isinstance(json_output, dict):
+			if serverURL != '-1':
+				json_output["clusters"][0]["cluster"]["server"] = serverURL
+			try:
+				pkubeconfig = json.dumps(json_output)
+				print(pkubeconfig)
+			except Exception as e:
+				print(e)
 
 if __name__ == '__main__':