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annotate mod_reload_components/README.markdown @ 5668:ecfd7aece33b

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mod_measure_modules: Report module statuses via OpenMetrics Someone in the chat asked about a health check endpoint, which reminded me of mod_http_status, which provides access to module statuses with full details. After that, this idea came about, which seems natural. As noted in the README, it could be used to monitor that critical modules are in fact loaded correctly. As more modules use the status API, the more useful this module and mod_http_status becomes.
author Kim Alvefur <zash@zash.se>
date Fri, 06 Oct 2023 18:34:39 +0200
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children
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1 Introduction
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2 ============
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3
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4 This module allows to load/unload external components after they have
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5 been added/removed to a configuration file. It is necessary to explicitly
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6 initiate a reload on Prosody either via prosodyctl reload or config:reload().
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7
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8 Example 1:
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9 --------
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10 If Prosody has started with this configuration file:
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11
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12 ``` {.lua}
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13 VirtualHost "example.com"
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14 authentication = "internal_plain"
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15
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16 Component "a.example.com"
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17 component_secret = "a"
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18
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19 Component "b.example.com"
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20 component_secret = "b"
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21 ```
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22
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23 And the file has changed manually or dynamically to:
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24
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25 ``` {.lua}
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26 VirtualHost "example.com"
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27 authentication = "internal_plain"
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28
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29 Component "a.example.com"
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30 component_secret = "a"
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31
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32 Component "c.example.com"
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33 component_secret = "c"
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34 ```
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35
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36 Then, the following actions will occur if this module is loaded:
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37
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38 1. The component c.example.com will be loaded and start bouncing for
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39 authentication.
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40 2. The component b.example.com will be unloaded and deactivated. The
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41 connection with it will not be closed, but no further actions will be
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42 executed on Prosody.
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43
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44 Example 2:
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45 --------
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46
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47 If Prosody has started with this configuration file:
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48
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49 ``` {.lua}
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50 VirtualHost "example.com"
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51 authentication = "internal_plain"
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52
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53 Component "a.example.com"
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54 component_secret = "a"
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55 ```
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56
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57 And the file has changed manually or dynamically to:
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58
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59 ``` {.lua}
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60 VirtualHost "example.com"
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61 authentication = "internal_plain"
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62
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63 Component "a.example.com"
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64 component_secret = "a"
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65
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66 VirtualHost "newexample.com"
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67 authentication = "internal_plain"
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68
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69 Component "a.newexample.com"
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70 component_secret = "a"
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71 ```
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72
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73 Then, the following actions will occur if this module is loaded:
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75 1. The component a.newexample.com will be loaded and start bouncing for
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76 authentication. Note that its respective VirtualHost is not loaded. Bad
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77 things may happen.
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78
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79 Usage
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80 =====
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81
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82 Copy the module folder into your Prosody modules directory. Place the
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83 module between your enabled modules either into the global or a vhost
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84 section.
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85
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86 No configuration directives are needed
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87
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88 Info
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89 ====
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90
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91 - 0.9, works