- allows custom tags to be added to prometheus metrics
- Addresses GH issue #4021
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#### Type Of Change
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#### Checklist:
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- [X] PR should be backported to stable branches
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#### Description
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This change adds a new parameter `xhttp_prom_tags`. It allows the user to append tags to
the prometheus metrics. This makes those metrics a lot more useful when having multiple
kamailio instances running on a single host.
This is done by 2 shared memory helper variables which contain the parameter in different
formats. This way it is easy to print them out with minimal changes.
You can view, comment on, or merge this pull request online at:
https://github.com/kamailio/kamailio/pull/4072
-- Commit Summary --
* xhttp_prom: new xhttp_prom_tags parameter
* Fixed formating
-- File Changes --
M src/modules/xhttp_prom/doc/xhttp_prom_admin.xml (25)
M src/modules/xhttp_prom/prom.c (30)
M src/modules/xhttp_prom/xhttp_prom.c (50)
M src/modules/xhttp_prom/xhttp_prom.h (15)
-- Patch Links --
https://github.com/kamailio/kamailio/pull/4072.patch
https://github.com/kamailio/kamailio/pull/4072.diff
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