[Bug 245167] sysutils/ezjail does not properly shutdown jails

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=245167

            Bug ID: 245167
           Summary: sysutils/ezjail does not properly shutdown jails
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs at FreeBSD.org
          Reporter: ml at netfence.it
                CC: erdgeist at erdgeist.org
                CC: erdgeist at erdgeist.org
             Flags: maintainer-feedback?(erdgeist at erdgeist.org)

Issuing "ezjail stop {jailname}" does NOT run shutdown script inside the jail;
instead it seems it just kills the jailed processes badly.
This can be a problem in several situations.

I was recently bitten by this, but see it was discussed several times earlier.
E.g.:
https://forums.freebsd.org/threads/jails-are-not-shutdown-during-reboot.51017/



The problem can be solved by changing jail_{jailname}_exec_stop in
${PREFIX}/etc/ezjail/{jailname}. This has to be done for every single jail.
Somewhere it is suggested this can be done globally, by putting
ezjail_exec_stop="/bin/sh /etc/rc.shutdown"
in ${PREFIX}/etc/ezjail.conf, but this did not work for me.



I understand there is no global consensus on whether rc.shutdown should be
called at jail stop; also I thinks FreeBSD base system's jail command defaults
to NOT running it.
However, ezjail(7) says:
 jail_JAILNAME_exec_stop
             The command to run inside the jail when stopping it. Defaults to
             the empty string, which means "/bin/sh /etc/rc.shutdown".

So either the default is really changed or the manual page should be corrected.

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