annotate mod_pubsub_alertmanager/README.md @ 5243:d5dc8edb2695

mod_http_oauth2: Use more compact IDs UUIDs are nice but so verbose! The reduction in entropy for the nonce should be fine since the timestamp is also counts towards this, and it changes every second (modulo clock shenanigans), so the chances of someone managing to get the same client_secret by registering with the same information at the same time as another entity should be negligible.
author Kim Alvefur <zash@zash.se>
date Sat, 11 Mar 2023 22:46:27 +0100
parents eba7e68120d8
children 67190744b1eb
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1 ---
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2 labels:
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3 - 'Stage-Alpha'
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4 summary: Alertmanager webhook receiver for pubsub
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5 ---
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6
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7 # Introduction
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8
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9 This module lets
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10 [Alertmanager](https://prometheus.io/docs/alerting/latest/alertmanager/)
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11 publish alerts to [pubsub][doc:pubsub] via
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12 [webhooks](https://prometheus.io/docs/alerting/latest/configuration/#webhook_config).
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14 # Setup
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15
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16 The relevant pubsub nodes must be created and configured somehow.
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17 Because the request IP address is used to publish, the `publisher`
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18 affiliation should be given to the IP address Alertmanager sends
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19 webhooks from.
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20
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21 # Configuration
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22
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23 ## Prometheus
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24
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25 A Prometheus `rule_files` might contain something along these lines:
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26
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27 ``` yaml
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28 groups:
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29 - name: Stuff
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30 rules:
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31 - alert: Down
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32 expr: up == 0
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33 for: 5m
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34 annotations:
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35 title: 'Stuff is down!'
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36 labels:
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37 severity: 'critical'
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38 ```
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39
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40 ## Alertmanager
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41 On the Alertmanager site the webhook configuration may look something
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42 like this:
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43
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44 ``` yaml
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45 receivers:
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46 - name: pubsub
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47 webhook_configs:
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48 - url: http://pubsub.localhost:5280/pubsub_alertmanager
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49 ```
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50
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51 And then finally some Alertmanager routes would point at that receiver:
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52
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53 ``` yaml
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54 route:
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55 receiver: pubsub
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56 ```
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57
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58 ## Prosody
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59
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60 On the Prosody side, apart from creating and configuring the node(s)
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61 that will be used, configure your pubsub service like this:
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62
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63 ``` lua
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64 Component "pubsub.example.com" "pubsub"
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65 modules_enabled = {
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66 "pubsub_alertmanager",
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67 }
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68
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69 -- optional extra settings:
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70 alertmanager_body_template = [[
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71 *ALARM!* {annotations.title?Alert} is {status}
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72 Since {startsAt}{endsAt& until {endsAt}}
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73 Labels: {labels%
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74 {idx}: {item}}
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75 Annotations: {annotations%
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76 {idx}: {item}}
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77 ]]
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78
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79 alertmanager_node_template = "alerts/{alert.labels.severity}"
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80 ```
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81
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82 If no node template is given, either an optional part after
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83 "pubsub_alertmanager" in the HTTP path is used as node, or the string
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84 "alerts". Here, an alerts would be published to different nodes based on
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85 the 'severity' label, so e.g. `alerts/critical` in this example.
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86
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87 ## All Options
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88
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89 Available configuration options:
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90
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91 `alertmanager_body_template`
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92 : Template for the textual representation of alerts.
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93
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94 `alertmanager_node_template`
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95 : Template for the pubsub node name, defaults to `"{path?alerts}"`