OS Manuals

systemd-journal-gatewayd.service(8)

SYSTEMD-JOURNAL-GATEWAYD.SERVICE(8) systemd-journal-gatewayd.service SYSTEMD-JOURNAL-GATEWAYD.SERVICE(8)


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


.SH "SYNOPSIS"


.PP systemd-journal-gatewayd.service


.PP systemd-journal-gatewayd.socket


.HP 1008u


/usr/lib/systemd/systemd-journal-gatewayd
[OPTIONS...]


.SH "DESCRIPTION"


.PP 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.


.PP 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.


.SH "OPTIONS"


.PP The following options are understood:


.PP --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=.


Added in version 198.


.RE


.PP --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.


Added in version 198.


.RE


.PP --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.


Added in version 236.


.RE


.PP --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.


Added in version 249.


.RE


.PP -m, --merge


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


Added in version 249.


.RE


.PP -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.


Added in version 232.


.RE


.PP --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).


Added in version 249.


.RE


.PP -h, --help


Print a short help text and exit.


.RE
.PP --version


Print a short version string and exit.


.RE


.SH "SUPPORTED URLS"


.PP The following URLs are recognized:


.PP /boots


Returns json-seq (RFC 7464) response containing JSON objects, each one containing boot number, its ID and the timestamps of the first and last message. Boots are returned starting with the latest boot first and use the same schema as journalctl --list-boots --output json.


Added in version 258.


.RE


.PP /browse


Interactive browsing.


Added in version 197.


.RE


.PP /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.


Added in version 197.


.RE


.PP /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",


  ...}


Added in version 197.


.RE


.PP /fields/FIELD_NAME


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


Added in version 197.


.RE


.SH "ACCEPT HEADER"


.PP Accept: format


.PP Recognized formats:


.PP text/plain


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


Added in version 197.


.RE


.PP application/json


Entries are formatted as JSON data structures, one per line (like journalctl --output json). See Journal JSON Format[1] for more information.


Added in version 197.


.RE


.PP 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).


Added in version 229.


.RE


.PP 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.


Added in version 197.


.RE


.SH "RANGE HEADER"


.PP Range: entries=[cursor][[:num_skip]:[num_entries]]


.PP Range: realtime=[since]:[until][[:num_skip]:num_entries]


.PP where cursor is a cursor string, defaults to the first entry, since and until are timestamps (seconds since 1970-01-01 00:00:00 UTC), num_skip is an integer, num_entries is an unsigned integer.


.PP Range defaults to all available events.


.PP If num_skip is negative and no cursor is given, the last entry will be the reference point.


.SH "URL GET PARAMETERS"


.PP Following parameters can be used as part of the URL:


.PP follow


wait for new events (like journalctl --follow, the number of events returned is not limited, unless num_entries is specified in the Range header).


Added in version 197.


.RE


.PP discrete


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


Added in version 197.


.RE


.PP boot


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


Added in version 197.


.RE


.PP KEY=match


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


Added in version 197.


.RE


.SH "EXAMPLES"


.PP 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'


.PP Listen for core dumps:

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


.SH "SEE ALSO"


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

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
systemd 262.2

systemd 262.2-r1 · os · ingested 2026-11-06