Forum: Cfengine Help
Subject: maintaining /etc/security/limits.conf with cf3
Author: svenXY
Link to topic: https://cfengine.com/forum/read.php?3,21465,21465#msg-21465
Hi,
I'm trying to come up with some bundles to maintain /etc/security/limits.conf
with cf3, but I don't quite achieve completely what I need.
I can insert lines fines if they are not there at all, but I fail at altering
existing lines (e.g. adjust thresholds). I tried with replace_lines and with
edit_fields, but to no avail. To me it seems that edit_field is more or less
ignored - at least that's the feeling I get here.
This is what I have so far:
body common control
{
bundlesequence => { 'test' };
inputs => { 'cfengine_stdlib.cf' };
}
bundle agent test
{
files:
"/tmp/limits.conf"
edit_line => limits_conf("fnord", "nofile", "378", "768"),
classes => if_repaired('limits_ok');
reports:
limits_ok::
"Limits are ok now";
}
bundle edit_line limits_conf(user, what, soft, hard)
{
# set the soft and hard limit for a given parameter for a given user
# in /etc/security/limits.conf
classes:
# lines are ok ...
"soft_limit_ok" expression =>
regline("${user}\s+soft\s+${what}\s+${soft}","$(edit.filename)"),
handle => "class_soft_limit_ok",
comment => "The soft limit is already set correctly";
"hard_limit_ok" expression =>
regline("${user}\s+hard\s+${what}\s+${hard}","$(edit.filename)"),
handle => "class_hard_limit_ok",
comment => "The hard limit is already set correctly";
# lines are there (but the value might be wrong)
"soft_limit_line" expression =>
regline("${user}\s+soft\s+${what}.*","$(edit.filename)"),
handle => "class_soft_limit_line",
comment => "The line does exist already";
"hard_limit_line" expression =>
regline("${user}\s+hard\s+${what}.*","$(edit.filename)"),
handle => "class_hard_limit_line",
comment => "The line does exist already";
soft_limit_line.!soft_limit_ok::
field_edits:
"${user}\s+soft\s+${what}\s+(?!${soft})"
edit_field => col("\s+","4","$(soft)","aphanum"),
comment => "Fix line for soft limit with field_edit";
hard_limit_line.!hard_limit_ok::
field_edits:
"${user}\s+hard\s+${what}\s+(?!${hard})"
edit_field => col("\s+","4","$(hard)","aplhanum"),
comment => "Fix line for hard limit with field_edit";
!soft_limit_line::
insert_lines:
"${user} soft ${what} ${soft}"
classes => if_repaired('soft_limit_ok'),
comment => "Add line for soft limit";
!hard_limit_line::
insert_lines:
"${user} hard ${what} ${hard}"
classes => if_repaired('hard_limit_ok'),
comment => "Add line for hard limit";
}
Any ideas or insight greatly appreciated,
thanks,
Sven
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