---
summary: JSON Log Sink
---

Conifiguration
==============

``` {.lua}
log = {
  -- your other log sinks
  info = "/var/log/prosody/prosody.log"
  -- add this:
  { to = "json", filename = "/var/log/prosody/prosody.json" };
}
```

Format
======

JSON log files consist of a series of `\n`-separated JSON objects,
suitable for mangling with tools like
[`jq`](https://stedolan.github.io/jq/).

``` {.json}
{"message":"Client connected","source":"c2s55f267f5b9d0","datetime":"2019-11-03T13:38:28Z","level":"info","args":[]}
{"message":"load_roster: asked for: %s","source":"rostermanager","datetime":"2019-11-03T13:38:28Z","level":"debug","args":["user@example.net"]}
```

`datetime`
:   [XEP-0082]-formatted timestamp.

`source`
:   Log source, usually a module or a connected session.

`level`
:   `debug`, `info`, `warn` or `error`

`message`
:   The log message in `printf` format. Combine with `args` to get the
    final message.

`args`
:   Array of extra arguments, corresponding to `printf`-style `%s`
    formatting in the `message`.