Check Real Time Resource Usage in RTF Appliance with a "kubectl top" Command

QUESTION

1. How to check resource usage for an application in RTF?
2. Is there a way to find if the assigned resources are enough or if they need to assign more resource

ANSWER

• How to check the memory usage of an application replica in RTF (Runtime Fabric)
• Check RTF Application Pod CPU Usage in Ops Center

1. Check the resources of a node. 

   $ sudo kubectl top node --heapster-namespace monitoring 
   NAME           CPU(cores)   CPU%   MEMORY(bytes)   MEMORY%
   172.31.0.241   411m         20%    2711Mi          73%
   172.31.0.34    102m         5%     808Mi           21%
   172.31.1.15    134m         6%     1426Mi          38%

2. Check the resources of a pod. Replace "demoapp" with own app name

   kubectl top pod  --heapster-namespace monitoring --all-namespaces -l app=demoapp
   NAMESPACE                              NAME                       CPU(cores)   MEMORY(bytes)
   6c3c3e41-e5a1-4423-81bc-0123456789ab   demoapp-55f4786b54-j2pdc   18m          523Mi
   6c3c3e41-e5a1-4423-81bc-0123456789ab   demoapp-55f4786b54-p6rmc   18m          528Mi

   Or leave the selector out to report on all your running pods 

   $ sudo kubectl top pod  --heapster-namespace monitoring --all-namespaces
   NAMESPACE                              NAME                                              CPU(cores)   MEMORY(bytes)
   bed42b62-604f-458d-915f-1b5018721f26   helloworldjo-5f46974c59-48m5x                     9m           559Mi
   bed42b62-604f-458d-915f-1b5018721f26   rtf-localhost-74bb54948c-5zzmc                    9m           539Mi
   bed42b62-604f-458d-915f-1b5018721f26   rtf-localhost-74bb54948c-8x6wt                    8m           575Mi
   bed42b62-604f-458d-915f-1b5018721f26   rtf-localhost-74bb54948c-dlcw9                    9m           529Mi
    ...