Automation / Download Agent Output

[Volker]

Hi All.

With CheckMk and the Browser GUI it is possible to produce a raw file by using Download Agent File. This option generates an URL and in the backgound a text file. So far so well. But this needs interaction with the browser GUI.

I do automation with CheckMk values. How can I use this way for automation? I tried some of the URLs in different versions inside a JAVA Program, but it fails often. So a stable usage seems to be impossible by simply using the URL in usall way.

I got things like this:

Internal error: [Errno 2] No such file or directory: ‘/omd/sites/arag_it/var/check_mk/backgrou nd_jobs/agent-output-arag_it-vl115add-agent/arag_it-server_xyz-agent.txt’

Internal error: [Errno 2] No such file or directory: ‘/omd/sites/arag_it/var/check_mk/background_jobs/agent-outpu t-arag_it-server_xyz-agent/arag_it-it-server_xyz-agent.txt’

An internal error occured while processing your request. You can report this issue to the Check_MK team to help fixing this issue. Please use the form bel ow for reporting.

I guess, it has something to do with interaction of the website in GUI and checkMk which I not have inside my JAVA Program.

…check_mk/fetch_agent_output.py?_start=1&back_url=view.py%3Fdeployment_last_contact_from%3D%26deployment_last_contact_until%3D%26deployment_last_download_from%3D%26deployment_last_download_until%3D%26deployment_last_registered_from%3D%26deployment_last_registered_until%3D%26host_last_check_from%3D%26host_last_check_until%3D%26host_last_state_change_from%3D%26host_last_state_change_until%3D%26selection%%26view_name%3Dallhosts&folder=&host=&type=agent

Which parameters produce this file (where is a very long list of parameters in the URL)? Exist where some special parameters to start the background_job producing the file without using a Browser? How can I start this background process by bash command using ssh? Exists these text files elsewhere on the checkMk server?

[Dirk]

@Volker

How can I start this background process by bash command using ssh?

If you can ssh to the checkmk server then it’s far easier than you imagined:

ssh CMKSERVER "su - SITEUSER -c 'cmk -d HOSTNAME'" > agent_ouput.txt

Et voilà, the agent output is in the local file agent_output.
The command cmk -d HOSTNAME (issued as site user) retrieves the agent output of the given hostname an prints it to stdout. If you can login as the site user, it’s even easier:

ssh SITEUSER@CMKSERVER cmk -d HOSTNAME > agent_ouput.txt

You don’t even need quotes here.

The “latest” agent output is also cached in the files ~siteuser/tmp/check_mk/cache/$hostname. Maybe that’s sufficient for you.

[r.sander (Robert Sander)]

@Dirk

If you can login as the site user, it’s even easier:

ssh SITEUSER@CMKSERVER cmk -d HOSTNAME > agent_ouput.txt

You don’t even need quotes here.

It’s even more easy:

cat $OMD_ROOT/tmp/check_mk/cache/$HOSTNAME

But why on earth do you need the raw agent data for automation? Do you really like to re-interpret all the data?

[Volker]

Typically not all figures are shown in the service or invetory views. Partions and filesystem. HD values…

sftp seems to be the choice for now. I am coming from a spring program inside a container to get the files.