-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Hi everyone,
I just pushed a huge amount of work into master of lttng-tools which is the network streaming support. Please read the commit message appended to this email for more information. Since LTTng is an open source _community_, this feature is now in "crowd sourcing QA mode" :). Feel free to test, report bugs, contribute or comment on anything. Again, please do so! (https://bugs.lttng.orgprojects/lttng-tools) Here is a quick HOWTO in order to test the feature with kernel tracing ("remote" will receive the trace and "target" will stream the trace): (remote) $ lttng-relayd -d --> (daemonize the relayd) (target) # lttng create mystream # lttng enable-consumer -k net://<remote_ip_or_hostname> # lttng enable-event -k sched_switch # lttng start # lttng stop (remote) Check in $(HOME)/lttng-traces/<target_hostname>/... Hopefully it will work for you :) There is a known bug so please refer to the commit message below. Big thanks to all the LTTng dev team especially Julien Desfossez (relayd author), Mathieu Desnoyers and Yannick Brosseau for helping with design, code and birth of this amazing feature :)! Please note that man page for the relayd, streaming HOWTOs and streaming protocol specification will come in the next days in doc/. So for now, experiment with it and read the --help of each new command :). Cheers! I'm out for a beer :D David commit 00e2e675d54dc726a7c8f8887c889cc8ef022003 Author: David Goulet <[email protected]> Date: Wed Jul 11 13:20:39 2012 -0400 Network streaming support This is a huge commit integrating a lot of new feature for network streaming support with the lttng-relayd previously merged. Please note that this commit is the initial import of the network streaming feature meaning that this is NOT stable and SHOULD be considered experimental hence not suited for production deployment. API Changes: lttng_create_session_uri(), lttng_enable_consumer(), lttng_set_consumer_uri() and lttng_disable_consumer() calls are added. The lttng command line now supports these new calls by introducing two new commands and one modified. (Please look at the --help option for more details). $ lttng enable-consumer $ lttng disable-consumer The "lttng create" command can now take new arguments to specify the destination URI for network streaming. There is also a new flag which allows the user to disable the consumer for the session. At this point, the now old deprecated lttng_create_session() call is still supported but SHOULD be replaced by lttng_create_session_uri(). More calls will be added to the API in order to facilitate the creation of lttng URI. Network streaming: Both kernel and user space tracing are supported for network streaming. For now, only IPv4 and IPv6 protocol over TCP is supported. Two network socket are used where one is for control commands and the second one is for data transmission. The port are respectively 5342 and 5343. BUGS: Streaming high throughput traces (e.g lttng enable-event -a -k) with low bandwitdh available to the relayd, the tracer does not behave well when the metadata are not emptied enough quickly so data are missing on the remote target and the tracing is simply not stoppable. This is a known bug and future iterations will try to fix it. WARNING: At this stage, there is _NO_ security features meaning no remote authentication on the relayd, no transport layer encryption or network secure handshake of some sort. So, uses only for in-vitro experiment or on _trusted_ networks. Signed-off-by: Julien Desfossez <[email protected]> Signed-off-by: David Goulet <[email protected]> -----BEGIN PGP SIGNATURE----- iQEcBAEBCgAGBQJP/ch5AAoJEELoaioR9I02IYsH/RjaaUTWZDKL/sotQxfdKU/k Xq1qjrCiluLbgLJ+CvQDPCIEXzzWbySfQG/REUVbvN9bjQ+DPBMBdpQ1V/bjiAFt aOnpb8Om8YP1oMAXP+Mg7TYGTVMagAURx4IA1YP/Fkmv/tU+OhZEX00YDH3tu6Q6 sLTvEAzTBkrjh2HjeqlnKmevrZ4+OTr8LaNmDFznk3vUNyIkbGpFVYLfJWGI3CYF 3zAajqccZHosDDOVV1TMYkY+ZlVto20TJLjw5T+/efKaPcROpgnbN4guA5mdrDmr heyt6kGnhS30XWaZ8MS57IuySCWCIhpGTWw9kGrd3zXhgYRa4cion3+oXN/KxSU= =GEdj -----END PGP SIGNATURE----- _______________________________________________ lttng-dev mailing list [email protected] http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
