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mod_prometheus/README.markdown

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mod_prometheus/README.markdown @ 5173:460f78654864

mod_muc_rtbl: also filter messages This was a bit tricky because we don't want to run the JIDs through SHA256 on each message. Took a while to come up with this simple plan of just caching the SHA256 of the JIDs on the occupants. This will leave some dirt in the occupants after unloading the module, but that should be ok; once they cycle the room, the hashes will be gone. This is direly needed, otherwise, there is a tight race between the moderation activities and the actors joining the room.
author Jonas Schäfer <jonas@wielicki.name>
date Tue, 21 Feb 2023 21:37:27 +0100
parent 4790:bb66e87a3604
child 5413:c90011054335
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1 ---
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2 labels:
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3 - Statistics
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4 summary: Implementation of the Prometheus protocol
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5 ...
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6
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7 Description
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8 ===========
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9
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10 This module implements the Prometheus reporting protocol, allowing you
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11 to collect statistics directly from Prosody into Prometheus.
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13 See the [Prometheus documentation][prometheusconf] on the format for
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14 more information.
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16 [prometheusconf]: https://prometheus.io/docs/instrumenting/exposition_formats/
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17
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18 **Note:** For use with Prosody trunk (0.12) we recommend the bundled
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19 [mod_http_openmetrics](https://prosody.im/doc/modules/mod_http_openmetrics)
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20 instead. This module (mod_prometheus) will continue to be available in the
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21 community repository for use with older Prosody versions.
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22
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23 Configuration
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24 =============
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25
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26 mod\_prometheus itself doesn’t have any configuration option, but it
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27 requires Prosody’s [internal statistics
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28 provider](https://prosody.im/doc/statistics#built-in_providers) to be
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29 enabled. You may also want to change the default collection interval
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30 to the one your statistics consumer is using. See below for more information.
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31
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32 ```lua
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33 statistics = "internal"
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34 statistics_interval = 15 -- in seconds
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35 ```
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36
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37 ::: {.alert .alert-warning}
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38 **NOTE:** Make sure to put the statistics variables in the global section of
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39 the configuration, **not** in a `VirtualHost` or `Component` section. You can
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40 use `prosodyctl check` if you are unsure and want to check your configuration.
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41 :::
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42
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43 See also the documentation of Prosody’s [HTTP
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44 server](https://prosody.im/doc/http), since Prometheus is an HTTP
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45 protocol that is how you can customise its URL. The default one being
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46 http://localhost:5280/metrics
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47
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48 Scrape interval vs statistics_interval
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49 --------------------------------------
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50
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51 The `statistics_interval` should be set to `"manual"` on trunk if and only
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52 if you have a single Prometheus instance scraping Prosody. This will allow
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53 the internal statistics gathering to run optimally.
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54
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55 If you have multiple instances scraping Prosody, set `statistics_interval`
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56 to the scrape interval of Prometheus to avoid errors in rate calculations
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57 and similar.
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58
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59 Future work will allow the use of `"manual"` with multiple Prometheus
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60 instances and varying scrape intervals (stay tuned).
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61
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62 Compatibility
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63 =============
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64
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65 ------- -------------
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66 trunk Works (but replaced by [mod_http_openmetrics](https://prosody.im/doc/modules/mod_http_openmetrics))
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67 0.11 Works
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68 0.10 Works
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69 0.9 Does not work
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70 ------- -------------