fedmsg-logger(1) simply emit messages from the command-line to the fedmsg bus


fedmsg-logger [--message LOGGER_MESSAGE] [--json-input] [--topic TOPIC] [--modname MODNAME] [--cert-prefix CERT_PREFIX] [<common fedmsg options>]

fedmsg-logger [-h|--help]


fedmsg-logger is a simple command-line utility to send messages to the fedmsg bus. It is an ephemeral command, that doesn't bind a 0mq endpoint directly. It sends its messages to a fedmsg-relay(1) daemon that binds a persistent endpoint that the outside world can subscribe to. If the fedmsg-relay(1) service is not running at the address specified in the config, then fedmsg-logger will hang until that service becomes available.

If --message is not specified, this command accepts messages from stdin.


-h, --help
Print an help message and exit
The message to send.
Take each line of input as JSON.
--topic TOPIC
The topic to which the messages are sent. Defaults to log if unset.
--modname MODNAME
The module name to which the messages are sent. Defaults to logger if unset.
--cert-prefix CERT_PREFIX
Specify a different cert from /etc/pki/fedmsg


--io-threads IO_THREADS
Number of io threads for 0mq to use
--topic-prefix TOPIC_PREFIX
Prefix for the topic of each message sent.
--post-init-sleep POST_INIT_SLEEP
Number of seconds to sleep after initializing.
--config-filename CONFIG_FILENAME
Config file to use.
Simply print out the configuration and exit. No action taken.
--timeout TIMEOUT
Timeout in seconds for any blocking zmq operations.
--high-water-mark HIGH_WATER_MARK
Limit on the number of messages in the queue before blocking.
--linger ZMQ_LINGER
Number of milliseconds to wait before timing out connections.


The full topic to which the messages are sent is constructed from the topic_prefix and environment set in the fedmsg configuration, and the --topic TOPIC and --modname MODNAME options this way:



Note that when using --json-input, you must send valid JSON, including the use of double quotes as opposed to single quotes:

{"a": 1} is valid JSON.
{'a': 1} is invalid JSON.


Send a message from standard input in JSON format:

echo '{"a": 1}' | fedmsg-logger --json-input

Send a message to the git.repo.update topic

echo "Hai there." | fedmsg-logger --modname=git --topic=repo.update

Send a simple message:

fedmsg-logger --message="This is a message."

Send a JSON-format message:

fedmsg-logger --message='{"a": 1}' --json-input


The Fedora Infrastructure team <[email protected]>
Wrote the fedmsg software.
Nicolas Dandrimont <[email protected]>
Wrote this manpage for the Debian system.


Copyright © 2014 Nicolas Dandrimont

This manual page was written for the Debian system (and may be used by others).

You can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

On Debian systems, a copy of the license can be found in the /usr/share/common-licenses/LGPL-2.1 file.