* Initial metrics support based on Prometheus
This commit introduces initial support for metrics in open5gs.
The metrics code is added as libogsmetrics (lib/metrics/), with a well
defined opaque API to manage different types of metrics, allowing for
different implementations for different technologies to scrap the
metrics (placed as lib/metrics/<impl>/. The implementation is right now
selected at build time, in order to be able to opt-out the related dependencies
for users not interested in the features. 2 implementations are already
provided in this commit to start with:
* void: Default implementation. Empty stubs, acts as a NOOP.
* prometheus: open5gs processes become Prometheus servers, offering
states through an http server to the Prometheus scrappers. Relies on
libprom (prometheus-client-ci [1] project) to track the metrics and format
them during export, and libmicrohttpd to make the export possible through
HTTP.
[1] https://github.com/digitalocean/prometheus-client-c
The prometheus-client-c is not well maintained nowadays in upstream, and
furthermore it uses a quite peculiar mixture of build systems (autolib
on the main dir, cmake for libprom in a subdir). This makes it difficult
to have it widely available in distros, and difficult to find it if it
is installed in the system. Hence, the best is to include it as a
meson subproject like we already do for freeDiameter. An open5gs fork is
requried in order to have an extra patch adding a top-level
CMakeList.txt in order to be able to includ eit from open5gs's meson
build. Furthermore, this allows adding bugfixes to the subproject if any
are found in the future.
* [SMF] Initial metrics support
* [SMF] Add metrics at gtp_node level
* docs: Add tutorial documenting metrics with Prometheus
- Set the number of UEs in units of AMF/MME instead of gNB/eNB.
- See default value as shown below
Number of UEs per AMF/MME : 4,096
Number of gNB/eNB per AMF/MME : 32
1. Dont run the P-CSCF, I-CSCF and S-CSCF as systemctl process
2. Run all the IMS process in foreground for better debugging
3. Run all the IMS process (or atleast P-CSCF) in foreground as ROOT user and NOT SUDO - Handles non-creation of IPSec tunnel issue
* Adopt tutorial format to dockerized VoLTE lab
* Fixed several lines according to Supreeth's feedback
* add PCAP analysis to successful calls
* set APN type to IPv4
* remove redundant APN screenshots
- Added more info to disable VoIP calling so that it doesnt intefere with VoLTE call test
- Checkout 5.3 branch of kamailio (better for IPSec requiring phones)
* Updated the docs for setting up a working VoLTE testbed
* Fixed docs formatting
* More formatting fixes of doc
* Handling NAS Bearer Resource Modification Request to prevent crashing of mme
* Corrected tutorial with right APN settings required in Mongo DB for VoLTE UE
* Added more steps to enable calling using only USIM
* More changes to VoLTE document based on working setup
* Updated guide with link to a safe and better way to force enable VoLTE on phones
* Updated the docs for setting up a working VoLTE testbed
* Fixed docs formatting
* More formatting fixes of doc
* Handling NAS Bearer Resource Modification Request to prevent crashing of mme
* Corrected tutorial with right APN settings required in Mongo DB for VoLTE UE
