Re: Jails that won't die...
From: Eirik Øverby (eirik_at_unicore.no)
Date: 06/29/05
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Date: Wed, 29 Jun 2005 15:28:09 +0200 To: Brian Fundakowski Feldman <green@freebsd.org>
On 28. jun. 2005, at 16.58, Brian Fundakowski Feldman wrote:
> On Tue, Jun 28, 2005 at 10:37:29AM +0200, Eirik Øverby wrote:
>
>> Hi,
>>
>> I have, since upgrading to 5.x and updating my management tools, seen
>> a number of problems relating to stopping jails.
>>
>> I'm maintaining several hosts with a number of full-featured jails
>> (i.e. full virtual FreeBSD installations in each jail), and in
>> general this works fine. However, whenever I stop a jail using 'jexec
>> <id> kill -SIGNAL -1' or 'jexec <id> /bin/sh /etc/rc.shutdown' (in
>> various combinations), jails have a tendency to stick around for
>> minutes or hours - according to 'jls'. Often I see an entry in
>> 'netstat -a' indicating that there is one or more sockets in FIN_WAIT
>> state, preventing the jail from coming down. Taking the virtual
>> network interface (alias) down does not help. All I can do at this
>> point is wait.
>>
>> I normally use 'jls' to determine whether or not a jail can be
>> restarted (i.e. it's not running), but this is pretty useless in such
>> cases. And right now I have a case where 'netstat -a' shows me
>> nothing pertaining to the jail, though it has no processes running. I
>> have therefore force-started the jail again, which seems to work
>> nicely, but now 'jls' gives me two entries for this jail, with
>> different JIDs.
>>
>> What am I doing wrong here?
>>
>
> You could just use ps to check for jailed processes and check their
> respective jails using the procfs status entry (at least according
> to the ps manpage...)
My jailctl script can do both - list by jls and list by processes in
the jail. There are NO processes running in the jail.
/Eirik
>
> --
> Brian Fundakowski Feldman
> \'[ FreeBSD ]''''''''''\
> <> green@FreeBSD.org \ The Power
> to Serve! \
> Opinions expressed are my own.
> \,,,,,,,,,,,,,,,,,,,,,,\
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