view mod_log_json/README.markdown @ 4887:806f7c8d830b

mod_ping_muc: Remove 'kick' status code The intent is "you fell off", not "you were kicked out", however older clients may not recognise the 333 code, but that will have to be an acceptable loss.
author Kim Alvefur <zash@zash.se>
date Mon, 07 Feb 2022 16:52:19 +0100
parents 4356088ad675
children
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---
summary: JSON Log Sink
---

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

Here we log to `/var/log/prosody/prosody.json`:

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

## UDP

Alternatively, it can send logs via UDP:

```lua
log = {
  { to = "json", udp_host = "10.1.2.3", udp_port = "9999" };
}
```

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/).

Example (with whitespace and indentation for readability):

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

`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`.

Formatted message
-----------------

If desired, at the obvious expense of performance, the formatted version of
the string can be included in the JSON object by specifying the `formatted_as`
key in the logger config:

``` {.lua}
log = {
  -- ... other sinks ...
  { to = "json", formatted_as = "msg_formatted", filename = "/var/log/prosody/prosody.json" };
}

```

This will expose the formatted message in the JSON as separate `msg_formatted`
key. It is possible to override existing keys using this (for example, the
`message` key), but not advisible.