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annotate mod_log_json/README.markdown @ 4813:0a257d1402c3
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| author | Kim Alvefur <zash@zash.se> |
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| date | Mon, 06 Dec 2021 18:19:19 +0100 |
| parents | 4356088ad675 |
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| rev | line source |
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| 3735 | 1 --- |
| 2 summary: JSON Log Sink | |
| 3 --- | |
| 4 | |
| 5 Conifiguration | |
| 6 ============== | |
| 7 | |
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8 Here we log to `/var/log/prosody/prosody.json`: |
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9 |
| 3735 | 10 ``` {.lua} |
| 11 log = { | |
| 12 -- your other log sinks | |
| 13 info = "/var/log/prosody/prosody.log" | |
| 14 -- add this: | |
| 15 { to = "json", filename = "/var/log/prosody/prosody.json" }; | |
| 16 } | |
| 17 ``` | |
| 18 | |
| 3746 | 19 ## UDP |
| 20 | |
| 21 Alternatively, it can send logs via UDP: | |
| 22 | |
| 23 ```lua | |
| 24 log = { | |
| 25 { to = "json", udp_host = "10.1.2.3", udp_port = "9999" }; | |
| 26 } | |
| 27 ``` | |
| 28 | |
| 3735 | 29 Format |
| 30 ====== | |
| 31 | |
| 32 JSON log files consist of a series of `\n`-separated JSON objects, | |
| 33 suitable for mangling with tools like | |
| 34 [`jq`](https://stedolan.github.io/jq/). | |
| 35 | |
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36 Example (with whitespace and indentation for readability): |
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37 |
| 3735 | 38 ``` {.json} |
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39 { |
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40 "args" : [], |
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41 "datetime" : "2019-11-03T13:38:28Z", |
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42 "level" : "info", |
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43 "message" : "Client connected", |
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44 "source" : "c2s55f267f5b9d0" |
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45 } |
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46 { |
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47 "args" : [ |
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48 "user@example.net" |
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49 ], |
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50 "datetime" : "2019-11-03T13:38:28Z", |
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51 "level" : "debug", |
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52 "message" : "load_roster: asked for: %s", |
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53 "source" : "rostermanager" |
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54 } |
| 3735 | 55 ``` |
| 56 | |
| 57 `datetime` | |
| 58 : [XEP-0082]-formatted timestamp. | |
| 59 | |
| 60 `source` | |
| 61 : Log source, usually a module or a connected session. | |
| 62 | |
| 63 `level` | |
| 64 : `debug`, `info`, `warn` or `error` | |
| 65 | |
| 66 `message` | |
| 67 : The log message in `printf` format. Combine with `args` to get the | |
| 68 final message. | |
| 69 | |
| 70 `args` | |
| 71 : Array of extra arguments, corresponding to `printf`-style `%s` | |
| 72 formatting in the `message`. | |
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73 |
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74 Formatted message |
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75 ----------------- |
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76 |
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77 If desired, at the obvious expense of performance, the formatted version of |
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78 the string can be included in the JSON object by specifying the `formatted_as` |
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79 key in the logger config: |
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80 |
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81 ``` {.lua} |
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82 log = { |
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83 -- ... other sinks ... |
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84 { to = "json", formatted_as = "msg_formatted", filename = "/var/log/prosody/prosody.json" }; |
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85 } |
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86 |
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87 ``` |
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88 |
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89 This will expose the formatted message in the JSON as separate `msg_formatted` |
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90 key. It is possible to override existing keys using this (for example, the |
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91 `message` key), but not advisible. |