[Release] Checkmk stable release 2.1.0p18

Dear friends of Checkmk,

the new stable release 2.1.0p18 of Checkmk is ready for download.

This maintenance release ships with 29 changes affecting all editions of Checkmk,
2 Enterprise Edition specific changes and 0 Managed Services Edition specific changes.

Support periods can be found here: Checkmk versions

Changes in all Checkmk Editions:

Agent bakery:

  • 15033 FIX: check_mk_agent.linux: increase refresh interval for chrony section…
  • 14706 FIX: mrpe: Fix missing output in agents if async execution enabled…
  • 14703 FIX: sap_hana: Fix agent plugin crash when querying fileinfo…


  • 15013 FIX: $HOSTADDRESS and $HOSTNAME can now be used in aggregation names

Checks & agents:

  • 14989 FIX: Extension package: Disable right MKP after a version was changed
  • 14986 FIX: FileNotFoundError in update-pre-hooks script “01_mkp-disable-outdated”…
  • 14705 FIX: fileinfo_groups: Fix state for ‘Out of relevant time of day’…
  • 14704 FIX: mk_mysql: Support for multiple sockets and aliases…
  • 14975 FIX: mk_postgres.py: correct UNIX socket not found when instances are configured…
  • 14702 FIX: ps: Fix crash if user or cgroup are empty…
  • 15035 FIX: wut_webio: handling of case when state is empty
  • 14827 FIX: mk_sshd_config: Monitor effective SSH daemon configuration…
    NOTE: Please refer to the migration notes!

Configuration generation:

  • 14701 FIX: automatic discovery: Fix automatic configuration update…


  • 14687 FIX: Fixed JSON encoding outside the BMP for Livestatus…

Metrics system:

  • 14780 FIX: Remove thresholds to new carbon/influxdb/RRD metrics…
    NOTE: Please refer to the migration notes!


  • 15004 FIX: Improved notification processing performance…


  • 13967 FIX: “Topic” attribute for host tags is now optional in REST API…
  • 13969 FIX: ETag for root folder is not correctly generated
  • 14905 FIX: REST API: Allow single item lists for the sites parameter on the host/service status endpoints
  • 13970 FIX: Showing the config of an agent will no longer fail with a Permission Mismatch


  • 14779 Remove less useful graphs…
  • 14924 SEC: Fix CSRF in add-visual endpoint…
  • 14985 FIX: Broken agent downloads: “This host has no Checkmk agents”
  • 15002 FIX: Fix “Base on role” default while cloning roles…
  • 15001 FIX: Fix possibility that changes made by form dialogs were not persisted…

Site management:

  • 15040 FIX: Make curl command work as site user on SLES 15 SP4…

User interface:

  • 15038 FIX: Distributed configuration: Fix active Setup menu on remote site…
  • 15005 FIX: Fix possible KeyError on service graphs view
  • 15003 FIX: Fix wrong results in view on combined host tag search

Changes in the Checkmk Enterprise Edition:

Agent bakery:

  • 13441 FIX: Baking agent with encrypted realtime checks

Reporting & availability:

  • 15000 FIX: Fix combined graphs in reports…

Changes in the Checkmk Managed Services Edition:

You can download Checkmk from our download page:

Please mail bug reports and qualified feedback to feedback@checkmk.com.
We greatly thank you for using Checkmk and wish you a successful monitoring,

Your Checkmk Team


Sorry but where do I find the mentioned “Migration Notes”?


I think it’s supposed to be these werks? There are some notes on what’s changing or what needs to be done if manual interaction is needed.

Werk #14780
Werk #14827

Thanks! I guess it would help to include these links in the release notes?

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@tboston if you go to https://checkmk.com/werk/<insert_werk_number> you get there.

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Still, I think it would help to add this hint to the Release Announcements anyway. :slight_smile:


Also, you can find the information within your site, on the lower left:
Those are the incompatible Werks. If you are told to look for the “Migration notes”, that is the place to be.

1 Like

I think @Sara is actually looking into that, so let me put her on the spot here. :yum:


But then its too late because I already updated, correct?

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exactly! :wink: But most likly you will have a test site for that :wink:


@robin.gierse is correct, I’ve looked into that with the dev team :slight_smile:
They actually have this improvement in their backlog, but unfortunately I am not sure when we could expect it to be implemented.

It is a nice thing to have – we might just need to wait a bit.


Well, I feel that we’re not on the same page here. I just asked if you can add the hint on how to get to the migration notes/werks in such Release Posts here in the forum. Nothing more.

Regarding the test site, sure, unless monitoring is not your only topic and you have a big IT-Team. I wouldn’t say that having a test site is a regular ‘thing’, though maybe thats just me. We do not have a test-site and we’d like to check everything before we update.


Hey @tboston,
If you want to see a list of werks for a specific version you can always get them like this:

So you can simply add/change the query parameter to the version you are interested in.


Check out the latest release post. It includes links to the werks.


I know its an extra mile for every release post - but worth it! much appreciated