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Add new rc.conf parameter "jail_reverse_stop"

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When a user defines "jail_list" in rc.conf the jails are started in the
order defined. Currently the jails are not are stopped in reverse order
which may break dependencies between jails/services and prevent a clean
shutdown. The new parameter "jail_reverse_stop" will shutdown jails in
"jail_list" in reverse order when set to "YES".

Please note that this does not affect manual invocation of the jail rc
script. If a user runs the command

  # service jail stop jail1 jail2 jail3

the jails will be stopped in exactly the order specified regardless of
jail_reverse_stop being defined in rc.conf.

PR:		196152
Approved by:	jamie
MFC after:	1 week
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D5233
This commit is contained in:
Mark Felder 2016-02-10 16:13:59 +00:00
parent 1e2b39a3f2
commit 0ba5cf0e44
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=295471
2 changed files with 9 additions and 2 deletions
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1
etc/defaults/rc.conf
View file

@ -694,6 +694,7 @@ iovctl_files="" # Config files for iovctl(8)
jail_enable="NO" # Set to NO to disable starting of any jails
jail_parallel_start="NO" # Start jails in the background
jail_list="" # Space separated list of names of jails
jail_reverse_stop="NO" # Stop jails in reverse order
##############################################################
### Define source_rc_confs, the mechanism used by /etc/rc.* ##

10
etc/rc.d/jail
View file

@ -521,7 +521,11 @@ jail_stop()
command=$jail_program
rc_flags=$jail_flags
command_args="-f $jail_conf -r"
$jail_jls name | while read _j; do
if checkyesno jail_reverse_stop; then
$jail_jls name | tail -r
else
$jail_jls name
fi | while read _j; do
echo -n " $_j"
_tmp=`mktemp -t jail` || exit 3
$command $rc_flags $command_args $_j >> $_tmp 2>&1
@ -536,6 +540,7 @@ jail_stop()
return
;;
esac
checkyesno jail_reverse_stop && set -- $(reverse_list $@)
for _j in $@; do
_j=$(echo $_j | tr /. _)
_jv=$(echo -n $_j | tr -c '[:alnum:]' _)
@ -571,5 +576,6 @@ jail_warn()
load_rc_config $name
case $# in
1) run_rc_command $@ ${jail_list:-_ALL} ;;
*) run_rc_command $@ ;;
*) jail_reverse_stop="no"
run_rc_command $@ ;;
esac