Q:

Remotely check CPU, memory and disk space IBM Bluemix PHP instance

Remotely check CPU, memory and disk space IBM Bluemix PHP instance.
I have a php instance running in IBM Bluemix.
Now I want to check the CPU, Memory and Disk Space from an external program by calling a php web page.  
For CPU I tried the following function:
function get_server_cpu_usage(){
    $load = sys_getloadavg();
    $cores = shell_exec("grep 'model name' /proc/cpuinfo | wc -l");
    $load[2] = ($load[2] / $cores) * 100;
    return $load[2];
}

For  Memory I use the following function:
memory_get_usage(true)

For  Disk Space I use the following function:
disk_free_space("/") 

But when I compare these results with the results provided by the IBM Bluemix Console, they are different.
Is there a correct way to externally monitor these values?

A:

You can retrieve that information using CF API REST call. You can find the CF APIs documentation here:

Application summary:
https://apidocs.cloudfoundry.org/234/apps/get_app_summary.html
Detailed application stats: https://apidocs.cloudfoundry.org/234/apps/get_detailed_stats_for_a_started_app.html

In this specific case you could do a curl call from your php application and parse the JSON response for CPU, Memory and Disk Space information.

curl "https://api.ng.bluemix.net/v2/apps/YOURAPP_GUID/summary" -X
  GET -H "Authorization: bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyX2lkIjoidWFhLWlkLTQyNCIsImVtYWlsIjoiZW1haWwtMjkzQHNvbWVkb21haW4uY29tIiwic2NvcGUiOlsiY2xvdWRfY29udHJvbGxlci5hZG1pbiJdLCJhdWQiOlsiY2xvdWRfY29udHJvbGxlciJdLCJleHAiOjE0NjA1MDY2NjF9.iUpeFnPKDWf3sxvDB0RF2_nSLAkqLZP7iN6Nx0bWE-Q"

You can retrieve the Authorization header with:
cf oauth-token

after login to IBM Bluemix (cf login)
If you want retrieve the auth-token from your application you should use another REST API before running the first curl get.

curl -s -X POST -H "Accept-Encoding: application/json" -d
  "grant_type=password&password=YOURPASSWORD&scope=&username=YOURUSERNAME"
  -u "cf:" https://login.ng.bluemix.net/UAALoginServerWAR/oauth/token

