mirror of
https://github.com/rocky-linux/infrastructure
synced 2024-12-22 19:08:30 +00:00
60 lines
2.2 KiB
Markdown
60 lines
2.2 KiB
Markdown
|
# Monitoring
|
||
|
|
|
||
|
|
For the now the the planned monitoring platform is [Prometheus](https://prometheus.io/).
|
||
|
|
|
||
|
|
Initially, we should keep it simple. Prometheus can scale a long way and
|
||
|
|
allows a lot of clever stuff involving data archival and service discovery.
|
||
|
|
This can all come in the medium-term.
|
||
|
|
|
||
|
|
For now we want to solve the basics:
|
||
|
|
|
||
|
|
- collect infrastucture metrics
|
||
|
|
- visualise those over a reasonable time-frame
|
||
|
|
- be alerted if one of those metrics does somehthing funky
|
||
|
|
|
||
|
|
For now we do not need HA, multi-year retention or automatic service discovery,
|
||
|
|
so I propose something like the following:
|
||
|
|
|
||
|
|
- A single prometheus host in AWS
|
||
|
|
- Non-AWS Exporters added via Ansible using file_sd
|
||
|
|
- AWS hosted exporters added via ec2_sd
|
||
|
|
- Grafana on that host
|
||
|
|
- Alertmanager on that same host
|
||
|
|
- Non-critical alerts in a dedicated channel
|
||
|
|
- Critical alerts to a small group via a service like Pushover/Pagerduty.
|
||
|
|
|
||
|
|
## Pretty pictures via Python
|
||
|
|
|
||
|
|
Use [python-diagrams](https://diagrams.mingrammer.com) to build construct the diagram.
|
||
|
|
|
||
|
|
```
|
||
|
|
pip install --user diagrams
|
||
|
|
python ./prometheus-mvp.py
|
||
|
|
```
|
||
|
|
|
||
|
|
We'll automate putting the outputed file somewhere ASAP
|
||
|
|
|
||
|
|
## What this is NOT addressing
|
||
|
|
|
||
|
|
I am purposely not covering Logging and web service uptime here. We can check
|
||
|
|
web services with Prometheus, but an external service (UptimeRobot?) is, in my
|
||
|
|
opion, better suited to that problem.
|
||
|
|
|
||
|
|
Likewise, I do not see Logging as directly related. A separate stack is
|
||
|
|
necessary for that. Loki would perhaps be a good solution that could
|
||
|
|
use the same Grafana instance. ELK and Graylog are also worth considering.
|
||
|
|
|
||
|
|
## Responsiblities
|
||
|
|
|
||
|
|
The monitoring team cannot realistically be responsible for how every single
|
||
|
|
is monitored. Prometheus has a huge library of exporters for almost everything.
|
||
|
|
|
||
|
|
The monitoring team can be responsible for ensuring that the infrastructure is
|
||
|
|
available to the application/infrastructure teams. Also that knowledge of how
|
||
|
|
to be added to that infrastucture is suitably shared.
|
||
|
|
|
||
|
|
It falls on the application teams themselves to find a suitable exporter, add
|
||
|
|
it to the Prometheus server and write the necessary alerts, queries and
|
||
|
|
dashboards. Obviously, we will help as much as we can, but please don't ask
|
||
|
|
me to learn the internals of FreeIPA for example.
|