Date: Fri, 14 Feb 2014 09:51:22 -0600 From: dweimer <dweimer@dweimer.net> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: jail -r & jail -R Message-ID: <ffe858e615f6bddaa7e24d80aa119be8@dweimer.net>
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I think I may have discovered a bug in the jail management system, if you look at the man page for jail. -r Remove the jail specified by jid or name. All jailed processes are killed, and all children of this jail are also removed. -R A variation of the -r option that removes an existing jail with- out using the configuration file. No removal-related parameters for this jail will be used - the jail will simply be removed. However I have discovered, even though -r says it can take either the jail name or jail id, if you use the id it appears to function as if you used the -R option instead, whereas using the -r option with the name correctly stops the jail with the configuration parameters from the jail.conf. I discovered this trying to figure out why the jails devfs system was not dismounting, and my exec.poststop script was not running. I discovered that if I used the name instead of id, I didn't run into this issue. Can anyone else verify that this is a bug or invalid information in man if its not, or do I have something wrong in my configuration, below is a sample configuration and steps that can be used to reproduce the issue. Example /etc/jail.conf: apache { jid = 1; host.hostname = apache.mydomainname.com; ip4.addr = 192.168.1.2; interface = em0; path = /jails/apache/10.0-r260787-2014.02.12; allow.mount.devfs; mount.devfs; allow.sysvipc; exec.start = "/bin/sh /etc/rc"; exec.stop = "/bin/sh /etc/rc.shutdown"; exec.prestart = "/jails/apache/prestart.sh"; exec.poststop = "/jails/apache/poststop.sh"; exec.consolelog = "/jails/apache/console.log"; } repeatable test scenario: jail -c apache all looks good jail -r apache all is right, jail devfs is gone, /jails/apache/proststop.sh ran. jail -c apache all looks good jail -r 1 something is wrong /jails/apache/10.0-r260787-2014.02.12/dev is still mounted /jails/apache/proststop.sh hasn't run jail is gone do manually cleanup umount /jails/apache/10.0-r260787-2014.02.12/dev execute /jails/apache/proststop.sh script jail -c apache all looks good jail -R apache As expected /jails/apache/10.0-r260787-2014.02.12/dev is still mounted /jails/apache/proststop.sh hasn't run jail is gone. -- Thanks, Dean E. Weimer http://www.dweimer.net/
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