[Bug 1569454] Comment bridged from LTC Bugzilla

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------- Comment From geraldsc at de.ibm.com 2016-04-13 12:26 EDT-------
(In reply to comment #8)
> added mon_fsstatd and mon_procd as separate systemd units in a
> s390-tools-statd package, one should have an appropriately configured z/VM,
> as otherwise the daemons will run, but will fail to write out any monitoring
> data.

These services should not be started by default. They serve a very
specific scenario, and apart from the correct z/VM guest setup (which
you cannot query from inside the guest), you also need someone who will
actually read the data that gets written by those service. AFAIR, this
was a very specific scenario from one customer, who also had a custom
solution for reading/evaluating the data, so it would be useless
overhead if enabled by default.

For the sake of completeness, here are the setup requirements from
http://public.dhe.ibm.com/software/dw/linux390/docu/l4n2dd28.pdf
(Chapter 33. Writing z/VM monitor records / Chapter 52. Commands for
Linux on z Systems):

Setting up the user z/VM guest virtual machine
You must enable your z/VM guest virtual machine to write monitor records and configure the z/VM system to collect these records.
Procedure
Perform these steps:
1. Set this option in the z/VM user directory entry of the virtual machine in which the application that uses this device driver is to run:
- OPTION APPLMON

2. Issue the following CP commands to have CP collect the respective types of monitor data:
- MONITOR SAMPLE ENABLE APPLDATA ALL
- MONITOR EVENT ENABLE APPLDATA ALL
You can log in to the z/VM console to issue the CP commands. These commands must be preceded with #CP. Alternatively, you can use the vmcp command for issuing CP commands from your Linux instance. See z/VM CP Commands and Utilities Reference, SC24-6175 for information about the CP MONITOR command.

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https://bugs.launchpad.net/bugs/1569454

Title:
  Provide daemon support via systemd for mon_fsstatd, mon_procd,
  mon_statd

Status in s390-tools package in Ubuntu:
  Fix Released

Bug description:
  == Comment: #1 - Heinz-Werner Seeck - 2016-04-12 11:14:09 ==
  With s390-tools (1.34.0-0ubuntu3) mon_statd daemons are able to start manually, using binaries for mon_fsstatd and mon_procd.

  But there are no services for these binaries available.
  In addition also the main service mon_statd is missing also.

  Please integrate these services via systemd

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