Hosttags

You can use the Syncer to manage given Host tags groups. This means, you can use the Attributes of your Hosts, to add and remove the predefined Tags.

Just keep in mind, that the Syncer can't remove Hostags which are still in use by rules. In such cases, it will just no longer update the group, but not throw an exception. Just a silent error is shown.

This feature is also using Syncer Host-Based caching to speed up even the extraction of Data and rewrites from over 100,000 Hosts. The cache is auto-refreshed if the Host changes.

How to configure

Go to:

Rules → Checkmk → Checkmk Tags

Create a new entry.

Field	Description
Group Topic Name	The Category used for the Group in Checkmk
Group Title	The Human Readable Title of the Group, Example: My Locations
Group ID	The internal ID of the group. Example my_locations
Group Help	Help text for the User
Group Single Choice	creates a group with just one on-off choice
Group Multiply by List	Create a set of multiple Groups, based on a list. See docu below
Group Multiply List	Syncer Attribute containing a list, use get_list(), See doco below
Filter by Account	Should the Syncer create the Tags based on Attributes only from objects managed by given Account Name
Rewrite ID	Jinja rewrite for the internal ID of tag. Example: {{name|lower()}}
Rewrite Title	Jinja rewrite the Human Readable Name of Tag Example: {{HOSTNAME|capitalize()}}
Enabled	Enables the Rule

Note: that {{ HOSTNAME }} is replaced by the Hostname. You can use every Host attribute here. Also, the Rewrite Fields support custom Syncer Functions.

Note 2: To the rewrite_id field, the cmk_cleanup_tag_id() function is applied automaticly. This is important to know, if you wan't to set tags. Make sure to use that Jinja Function.

Group Multiply by List

If you use this mode, the Syncer will create multiple groups which can't be rewritten and are based fully on the outcome of a list. In This case, you must use {{name}} as Placeholder for Topic Name and Title. In Group Multiply by List, you need to provide a Python list. This is archived with the get_list helper.

Example:

{{get_list(YOUR_LIST_ATTRIBUTE)|safe}}
{{get_list(['Name1', 'Name2', "Name3'])|safe}}

Make sure to use |safe otherwise the System will escape that list