SYSTEMD-JOURNAL-GATEWAYD.SERVICE(8)

NAME
systemd-journal-gatewayd.service, systemd-journal-gatewayd.socket, systemd-journal-gatewayd - HTTP server for journal events

SYNOPSIS

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).

-h, --help
    Print a short help text and exit.

--version
    Print a short version string and exit.

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[1] for more information.

text/event-stream
    Entries are formatted as JSON data structures, wrapped in a format suitable for Server-Sent Events[2] (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[3] 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[3]:

    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)

NOTES

1.  Journal JSON Format
    https://systemd.io/JOURNAL_EXPORT_FORMATS#journal-json-format

2.  Server-Sent Events
    https://developer.mozilla.org/en-US/docs/Server-sent_events/Using_server-sent_events

3.  Journal Export Format
    https://systemd.io/JOURNAL_EXPORT_FORMATS#journal-export-format