lttng-relayd(8)
===============
+:revdate: 5 June 2018
NAME
*lttng-relayd* [option:--background | option:--daemonize]
[option:--control-port='URL'] [option:--data-port='URL'] [option:--live-port='URL']
[option:--output='PATH'] [option:-v | option:-vv | option:-vvv]
+ [option:--working-directory='PATH']
DESCRIPTION
-----------
-The http://lttng.org/[_Linux Trace Toolkit: next generation_] is an open
+The https://lttng.org/[_Linux Trace Toolkit: next generation_] is an open
source software package used for correlated tracing of the Linux kernel,
user applications, and user libraries.
it can write to the output directory and listen on the configured ports.
If a user is within a secured network and/or has proper firewall
settings, `lttng-relayd` can listen to LTTng live connections from _all_
-network interfaces by specifying `--live-port=tcp://0.0.0.0:5344`.
+network interfaces by specifying
++--live-port=tcp://{default_network_viewer_bind_address}:{default_network_viewer_port}+.
Once a trace has been streamed completely, the trace can be processed by
any tool that can process an LTTng trace located on the local
By default, the relay daemon writes the traces to:
[verse]
-$HOME/lttng-traces/'HOSTNAME'/'SESSION'/'DOMAIN'
+$LTTNG_HOME/lttng-traces/'HOSTNAME'/'SESSION'/'DOMAIN'
with:
Tracing domain.
You can override the default output directory prefix
-(`$HOME/lttng-traces`) with the option:--output option. The other
+(`$LTTNG_HOME/lttng-traces`) with the option:--output option. The other
parts depend on the remote configuration.
option:--background option instead to keep the file descriptors
open.
-option:-g, option:--group='GROUP'::
+option:-g 'GROUP', option:--group='GROUP'::
Use 'GROUP' as Unix tracing group (default: `tracing`).
-option:-o, option:--output='PATH'::
+option:-o 'PATH', option:--output='PATH'::
Set base directory of written trace data to 'PATH'.
+
See the <<output-directory,Output directory>> section above for more
information.
+option:-w 'PATH', option:--working-directory='PATH'::
+ Set the working directory of the processes this relay daemon creates.
+
option:-v, option:--verbose::
Increase verbosity.
+
See the <<url-format,URL format>> section above for more information
about the syntax of the following options' 'URL' argument.
-option:-C, option:--control-port='URL'::
- Listen to control data on URL 'URL' (default: `tcp://0.0.0.0:5342`).
+option:-C 'URL', option:--control-port='URL'::
+ Listen to control data on URL 'URL' (default:
+ +tcp://{default_network_control_bind_address}:{default_network_control_port}+).
-option:-D, option:--data-port='URL'::
- Listen to trace data on URL 'URL' (default: `tcp://0.0.0.0:5343`).
+option:-D 'URL', option:--data-port='URL'::
+ Listen to trace data on URL 'URL' (default:
+ +tcp://{default_network_data_bind_address}:{default_network_data_port}+).
-option:-L, option:--live-port='URL'::
+option:-L 'URL', option:--live-port='URL'::
Listen to LTTng live connections on URL 'URL'
- (default: `tcp://0.0.0.0:5344`).
+ (default:
+ +tcp://{default_network_viewer_bind_address}:{default_network_viewer_port}+).
Program information
ENVIRONMENT VARIABLES
---------------------
+`LTTNG_ABORT_ON_ERROR`::
+ Set to 1 to abort the process after the first error is encountered.
+
`LTTNG_NETWORK_SOCKET_TIMEOUT`::
Socket connection, receive and send timeout (milliseconds). A value
of 0 or -1 uses the timeout of the operating system (default).
`LTTNG_RELAYD_HEALTH`::
Path to relay daemon health's socket.
+`LTTNG_RELAYD_TCP_KEEP_ALIVE`::
+ Set to 1 to enable TCP keep-alive.
++
+The TCP keep-alive mechanism allows the detection of dead peers
+(man:lttng-sessiond(8)) in cases of unclean termination
+(for example, a hard reset) of a peer.
++
+Supported on Linux and Solaris only. The default behaviour of the TCP
+keep-alive mechanism is OS-specific.
++
+Search for `tcp_keepalive` in man:tcp(7) for more information.
+
+`LTTNG_RELAYD_TCP_KEEP_ALIVE_ABORT_THRESHOLD`::
+ The time threshold in seconds to abort a TCP connection after the keep-alive
+ probing mechanism has failed.
++
+Set to 0 or -1 to use the value chosen by the operating system (default).
++
+Supported on Solaris 11 only.
++
+Search for `tcp_keepalive_abort_threshold` in man:tcp(7) for more information.
+
+`LTTNG_RELAYD_TCP_KEEP_ALIVE_IDLE_TIME`::
+ Number of seconds a connection needs to be idle before TCP begins
+ sending out keep-alive probes.
++
+Set to 0 or -1 to use the value chosen by the operating system (default).
++
+Supported on Linux and Solaris 11 only.
++
+On Solaris{nbsp}11, the accepted values are -1, 0, and 10 to 864000.
++
+Search for `tcp_keepalive_time` and `tcp_keepalive_interval`
+in man:tcp(7) on Solaris 11 for more information.
+
+`LTTNG_RELAYD_TCP_KEEP_ALIVE_MAX_PROBE_COUNT`::
+ Maximum number of TCP keep-alive probes to send before giving up and
+ killing the connection if no response is obtained from the other end.
++
+Set to 0 or -1 to use the value chosen by the operating system (default).
++
+Supported on Linux only.
++
+Search for `tcp_keepalive_probes` in man:tcp(7) for more information.
+
+`LTTNG_RELAYD_TCP_KEEP_ALIVE_PROBE_INTERVAL`::
+ Number of seconds between TCP keep-alive probes.
++
+Set to 0 or -1 to use the value chosen by the operating system (default).
++
+Supported on Linux only.
++
+Search for `tcp_keepalive_intvl` in man:tcp(7) for more information.
+
+`LTTNG_RELAYD_WORKING_DIRECTORY`::
+ Working directory of the processes this relay daemon creates.
++
+The option:--working-directory option overrides this variable.
+
FILES
-----
SEE ALSO
--------
-linklttng:lttng(1),
-linklttng:lttng-sessiond(8),
-linklttng:lttng-crash(1),
-linklttng:lttng-ust(3),
-linklttng:babeltrace(1)
+man:lttng(1),
+man:lttng-sessiond(8),
+man:lttng-crash(1),
+man:lttng-ust(3),
+man:babeltrace(1)