doc: add journalctl example for grepping the logs

I had to dig around for awhile to figure this out, so
this adds an example on how to grep journalctl nova logs
for a server instance UUID.

Change-Id: I6a5c47fbcba3af1822e2f9efc2ac20ebe0387f3f
This commit is contained in:
Matt Riedemann 2017-09-22 20:54:39 -04:00
parent 66a14df49e
commit 5085dc0fa5
1 changed files with 5 additions and 0 deletions

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@ -118,6 +118,11 @@ When outputting to the terminal using the default pager, long lines
appear to be truncated, but horizontal scrolling is supported via the
left/right arrow keys.
You can pipe the output to another tool, such as ``grep``. For
example, to find a server instance UUID in the nova logs::
sudo journalctl -a --unit devstack@n-* | grep 58391b5c-036f-44d5-bd68-21d3c26349e6
See ``man 1 journalctl`` for more.
Debugging