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annotate mod_pubsub_alertmanager/README.md @ 5401:c8d04ac200fc

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mod_http_oauth2: Reject loopback URIs as client_uri This really should be a proper website with info, https://localhost is not good enough. Ideally we'd validate that it's got proper DNS and is actually reachable, but triggering HTTP or even DNS lookups seems like it would carry abuse potential that would best to avoid.
author Kim Alvefur <zash@zash.se>
date Tue, 02 May 2023 16:20:55 +0200
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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13
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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}"`