monitor the amount of requests openstack4j does

Question

Jenkins's openstack-plugin uses openstack4j for talking to an openstack cloud. I'm looking for a way that we can we can monitor the amount of http(s) API calls openstack4j does, from client side perspective.

Some possible things to know:

• Jenkins can tell me that? (although I believe openstack4j does the http(s) call independently)
• it's running inside a container, some https call monitoring tools that I could use on that level?

Answer 1

Regarding your questions:

1. I don't think Jenkins can do this monitoring for you, in the end, it's just a big, distributed, job scheduler and runner. If there's no plugin purposefully written for this, it can't. You'd have to write it yourself.

2. Regarding the monitoring, there's a bunch of questions to answer, actually:

   • Do you want just a Java based solution?

     Surprisingly, I couldn't find anything Java based, the standard Java Management Extensions (JMX) apparently do not have direct support for investigating a process' open network connections.

     If it doesn't have to be Java-specific, you could use tcpdump or tshark to analyze the traffic, as long as you know where the calls go, for example.

     Another generic Linux based alternative is to launch the process through strace. You might need to make some adjustments for Java.

   • Is the connection HTTP or HTTPS (it matters a lot)?

     For HTTPS one option would be to man-in-the-middle the HTTPS connection with some sort of proxy. Then you can just check the logs of the proxy for the connections