systemd-journal-gatewayd.service

systemd
systemd-journal-gatewayd.service 8
systemd-journal-gatewayd.service systemd-journal-gatewayd.socket systemd-journal-gatewayd HTTP server for journal events

`systemd-journal-gatewayd.service`

`systemd-journal-gatewayd.socket`

`/usr/lib/systemd/systemd-journal-gatewayd` OPTIONS

## Description

`systemd-journal-gatewayd` serves journal events over the network. Clients must connect using HTTP. The server listens on port 19531 by default. If `--cert=` is specified, the server expects HTTPS connections.

The program is started by systemd 1 and expects to receive a single socket. Use `systemctl start systemd-journal-gatewayd.socket` to start the service, and `systemctl enable systemd-journal-gatewayd.socket` to have it started on boot.

## Options

The following options are understood:

`--cert=`

  Specify the path to a file or `AF_UNIX` stream socket to read the server certificate from. The certificate must be in PEM format. This option switches `systemd-journal-gatewayd` into HTTPS mode and must be used together with `--key=`.

`--key=`

  Specify the path to a file or `AF_UNIX` stream socket to read the secret server key corresponding to the certificate specified with `--cert=` from. The key must be in PEM format.

`--trust=`

  Specify the path to a file or `AF_UNIX` stream socket to read a CA certificate from. The certificate must be in PEM format.

`--system`
`--user`

  Limit served entries to entries from system services and the kernel, or to entries from services of current user. This has the same meaning as `--system` and `--user` options for journalctl 1. If neither is specified, all accessible entries are served.

`-m`
`--merge`

  Serve entries interleaved from all available journals, including other machines. This has the same meaning as `--merge` option for journalctl 1.

`-D DIR`
`--directory=DIR`

  Takes a directory path as argument. If specified, `systemd-journal-gatewayd` will serve the specified journal directory DIR instead of the default runtime and system journal paths.

`--file=GLOB`

  Takes a file glob as an argument. Serve entries from the specified journal files matching GLOB instead of the default runtime and system journal paths. May be specified multiple times, in which case files will be suitably interleaved. This has the same meaning as `--file=` option for journalctl 1.

## Supported URLs

The following URLs are recognized:

/browse

  Interactive browsing.

/entries[?option1&option2=value…]

  Retrieval of events in various formats.

  The `Accept:` part of the HTTP header determines the format. Supported values are described below.

  The `Range:` part of the HTTP header determines the range of events returned. Supported values are described below.

  GET parameters can be used to modify what events are returned. Supported parameters are described below.

/machine

  Return a JSON structure describing the machine.

  Example:

      { "machine_id" : "8cf7ed9d451ea194b77a9f118f3dc446",
        "boot_id" : "3d3c9efaf556496a9b04259ee35df7f7",
        "hostname" : "fedora",
        "os_pretty_name" : "Fedora 19 (Rawhide)",
        "virtualization" : "kvm",
        …}

/fields/FIELD_NAME

  Return a list of values of this field present in the logs.

## Accept header

`Accept: format`

Recognized formats:

`text/plain`

  The default. Plaintext syslog-like output, one line per journal entry (like `journalctl --output short`).

`application/json`

  Entries are formatted as JSON data structures, one per line (like `journalctl --output json`). See Journal JSON Format for more information.

`text/event-stream`

  Entries are formatted as JSON data structures, wrapped in a format suitable for Server-Sent Events (like `journalctl --output json-sse`).

`application/vnd.fdo.journal`

  Entries are serialized into a binary (but mostly text-based) stream suitable for backups and network transfer (like `journalctl --output export`). See Journal Export Format for more information.

## Range header

`Range: entries=cursor[[:num_skip]:num_entries]`

where cursor is a cursor string, num_skip is an integer, num_entries is an unsigned integer.

Range defaults to all available events.

## URL GET parameters

Following parameters can be used as part of the URL:

follow

  wait for new events (like `journalctl --follow`, except that the number of events returned is not limited).

discrete

  Test that the specified cursor refers to an entry in the journal. Returns just this entry.

boot

  Limit events to the current boot of the system (like `journalctl -b`).

KEY=match

  Match journal fields. See systemd.journal-fields 7.

## Examples

Retrieve events from this boot from local journal in Journal Export Format:

    curl --silent -H'Accept: application/vnd.fdo.journal' \
           'http://localhost:19531/entries?boot'

Listen for core dumps:

    curl 'http://localhost:19531/entries?follow&MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1'

## See Also

systemd 1, journalctl 1, systemd.journal-fields 7, systemd-journald.service 8, systemd-journal-remote.service 8, systemd-journal-upload.service 8