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Bug 1708662 - Document tailing logs looping behavior
Summary: Document tailing logs looping behavior
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: Documentation
Version: 8.2
Hardware: All
OS: All
medium
medium
Target Milestone: rc
: 8.0
Assignee: Lucie Vařáková
QA Contact: RHEL DPM
URL:
Whiteboard:
: 1691354 (view as bug list)
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-05-10 13:53 UTC by jstephen
Modified: 2019-08-21 10:43 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-08-21 10:43:41 UTC
Type: Bug
Target Upstream Version:
Embargoed:


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Description jstephen 2019-05-10 13:53:19 UTC
Document URL: 
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/recording_sessions/index

Suggestions for improvement: 
Add note about expected behavior of terminal output flooding when tailing logs inside a tlog recorded terminal session(tail -f /var/log/messages or journalctl -f).

When tlog recording is configured to log to the journal/syslog, the recorded user is seeing the act of recording the results of viewing the system journal or /var/log/messages. Since viewing generates logs, which then print to the screen, this causes session recording to record this action, which generates more records, causing a loop of flooded output.


The following command can be used as an alternative to the typical 'journalctl -f' command run inside a recorded session

    # journalctl -f | grep -v 'tlog-rec-session'

Tlog can also be configured to rate limit(throttle) output, refer to man tlog-rec or man tlog-rec-session for more detail.

Comment 1 jstephen 2019-05-10 14:01:25 UTC
This can be added to the section:

---------------------------

1.3. Limitations of session recording

Be aware that tlog does not record terminal in the Gnome 3 graphical session. Recording terminals in graphical sessions is not supported because a graphical session has a single audit session ID for all terminals and tlog does not have a way to distinguish between the terminals and prevent repeated recordings.

Comment 5 jstephen 2019-07-03 15:24:17 UTC
*** Bug 1691354 has been marked as a duplicate of this bug. ***


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