- allows custom tags to be added to prometheus metrics
- Addresses GH issue #4021
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#### Type Of Change
- [ ] Small bug fix (non-breaking change which fixes an issue)
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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/4070
-- Commit Summary --
* xhttp_prom: new xhttp_prom_tags parameter
-- File Changes --
M src/modules/xhttp_prom/doc/xhttp_prom_admin.xml (25)
M src/modules/xhttp_prom/prom.c (25)
M src/modules/xhttp_prom/xhttp_prom.c (45)
M src/modules/xhttp_prom/xhttp_prom.h (15)
-- Patch Links --
https://github.com/kamailio/kamailio/pull/4070.patch
https://github.com/kamailio/kamailio/pull/4070.diff
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