7:02 a.m.
Phillippe,
From man ausearch .. -ts, --start [start-date] [start-time]
Search
for events with time stamps equal to or after the given start time. The
format of
start time depends on your locale. You can check the format of your locale by
running date '+%x'. If the date is omitted, today is
assumed.
If the time is omitted, midnight is assumed. Use 24 hour clock time rather
than AM or PM to specify time. An example date using the en_US.utf8 locale
is 09/03/2009. An example of time is 18:00:00. The date format accepted
is influenced by the LC_TIME environmental variable.
You may also use the word: now, recent, boot, today, yesterday, this-
week, week-ago, this-month, this-year, or checkpoint. Boot means the time of day to
the second when the system last booted.
Today means starting at 1 second after midnight. Recent is 10
minutes ago. Yesterday is 1 second after midnight the previous day. This-week means
starting 1 second after midnight on day 0 of the week determined by
your locale (see localtime). Week-ago means starting 1 second after midnight exactly
7 days ago. This-month means 1 second after midnight on day 1 of the month. This-
year means the 1 second after midnight on the first day of the first
month.
checkpoint means ausearch will use the timestamp found within a
valid checkpoint file ignoring the recorded inode, device, serial, node and event
type also found within a checkpoint file. Essen‐ tially, this is the
recovery action should an invocation of ausearch with a checkpoint option fail with
an exit status of 10, 11 or 12. It could be used in a shell script something like:
ausearch --checkpoint /etc/audit/auditd_checkpoint.txt
-i _au_status=$? if test ${_au_status} eq 10 -o
${_au_status} eq 11 -o ${_au_status} eq
12 then ausearch --checkpoint
/etc/audit/auditd_checkpoint.txt --start checkpoint -i fi
That said, rather than sending events from multiple hosts to a single combined file,
I would strongly recommend one maintain multiple files, one per host. The most
recent change to the ausearch checkpoint code addressed this. Sogiven a directory
structure like say, repository/ repository/year/ repository/year/month
repository/year/month/day repository/year/month/day/hosta/auditd.log
repository/year/month/day/hostb/auditd.log
repository/year/month/day/hostc/auditd.log ...
repository/year/month/day/hostN/auditd.log
one could orchestrate a script that run's multiple ausearch commands along the lines
of ausearch -if repository/year/month/day/hosta/auditd.log --checkpoint
.../hosta.chkpt ... ausearch -if
repository/year/month/day/hostb/auditd.log --checkpoint .../hostb.chkpt ...
etc
On Fri, 2020-02-28 at 10:46 +0000, MAUPERTUIS, PHILIPPE wrote:
Hi
I set a cron job script to perform ausearch every 5 minutes on a central log
server.
The logs from various hosts are received together in the same file
The logs are rotated on a daily basis
Everything ran fine for several days, then suddently I got :
Corrupted checkpoint file. Inode match, but newer complete event
(1582684501.003:48035) found before loaded checkpoint 1582684346.999:48034
The events are :
checkpoint
audit.log.3: node=xxxxxxxx type=USER_END msg=audit(1582684346.999:48034):
pid=15666 uid=0 auid=0
newer event
audit.log.2: node= xxxxxxxx type=USER_ACCT msg=audit(1582684501.003:48035):
pid=16000
I guess the problem is due to the log rotation since the two messages are coming
from the same host.
I have a few questions
When it happens how can I restart the process ?
Is there a way to restart ausearch from the newer event ?
How could I extract the events between the checkpoint and the newer event ?
The checkpoint file contains :
dev=0xFD03
inode=1048581
output=xxxxxxxx 1582770601.342:380885 0x456
What is this : 0x456 ?
How can I find the value for a given event ?
Philippe
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