sysvipc only for one jail

[Trond Endrestøl]

On Mon, 12 Aug 2013 14:09+0200, Trond Endrestøl wrote:

> On Mon, 12 Aug 2013 13:57+0200, David Demelier wrote:
> 
> > 2013/8/12 Trond Endrestøl <Trond.Endrestol at fagskolen.gjovik.no>:
> > > On Mon, 12 Aug 2013 12:40+0200, David Demelier wrote:
> > >
> > >> 2013/8/11 Maciej Suszko <maciej at suszko.eu>:
> > >> > Maciej Suszko <maciej at suszko.eu> wrote:
> > >> > [...]
> > >> >>
> > >> >> You can specify different params for each jail using _parameters, for
> > >> >> example:
> > >> >>
> > >> >> jail_jailname_params="allow.chflags=1 allow.sysvipc=1"
> > >> >
> > >> > Sorry, my mistake - it should be jail_jailname_parameters= of course.
> > >> > --
> > >> > regards, Maciej Suszko.
> > >>
> > >> Thanks for your message,
> > >>
> > >> However, I could not find this setting in the manual of rc.conf(5)
> > >> neither in /etc/rc.d/jail :(. It does not seems to be applied.
> > >
> > > Have a look at jail(8) and the last lines of /etc/default/rc.conf.
> > 
> > I see,
> > 
> > I've added what Maciej Suszko told me but the sysctls in the jail is
> > not set as it should be :
> > 
> > security.jail.param.allow.sysvipc: 0
> > security.jail.param.allow.chflags: 0
> > 
> > And thus, it's not enabled as postgresql tells:
> > 
> > creating template1 database in /usr/local/pgsql/data/base/1 ... FATAL:
> >  could not create shared memory segment: Function not implemented
> 
> I'll look into this by creating a new jail for PostgreSQL 9.2 when I 
> get home.

My host is running 9.2-PRERELEASE, r254150, in VirtualBox 4.2.16.
The jails are running world, also at r254150.

I added the following to the host's /etc/rc.conf:

jail_enable="YES"
jail_list="postgresql"

jail_postgresql_rootdir="/jails/postgresql"
jail_postgresql_hostname="postgresql.bsd.net"
jail_postgresql_interface="vtnet0"
jail_postgresql_fib="0"
jail_postgresql_ip="10.0.2.103,2001:db8::103"
jail_postgresql_exec_start="/bin/sh /etc/rc"
jail_postgresql_exec_stop="/bin/sh /etc/rc.shutdown"
jail_postgresql_devfs_enable="YES"
jail_postgresql_parameters="enforce_statfs=1 allow.chflags=1 allow.sysvipc=1 allow.mount=1 allow.mount.zfs=1"

I added the following to the host's /etc/jail.conf:

postgresql {
  path = /jails/postgresql;
  enforce_statfs = 1;
  allow.chflags;
  allow.sysvipc;
  allow.mount;
  allow.mount.zfs;
  mount.devfs;
  host.hostname = postgresql.bsd.net;
  ip4.addr = 10.0.2.103;
  ip6.addr = 2001:db8::103;
  interface = vtnet0;
  exec.start = "/bin/sh /etc/rc";
  exec.stop = "/bin/sh /etc/rc.shutdown";
}

PostgreSQL 9.2.4 had no problems running initdb nor running postgres 
inside the jail:

root at freebsd-jails:/ # jexec 4 csh
root at postgresql:/ # /usr/local/etc/rc.d/postgresql status
pg_ctl: server is running (PID: 46623)
/usr/local/bin/postgres "-D" "/usr/local/pgsql/data"
root at postgresql:/ #

If you start the jail manually using jail(8), then /etc/jail.conf 
comes into play, whereas the lines in /etc/rc.conf is used during 
automatic startup of the jails when the host is rebooted. The whole 
arrangement seems unnecessary redundant, and I truly wish this can be 
merged sooner rather than later.

-- 
+-------------------------------+------------------------------------+
| Vennlig hilsen,               | Best regards,                      |
| Trond Endrestøl,              | Trond Endrestøl,                   |
| IT-ansvarlig,                 | System administrator,              |
| Fagskolen Innlandet,          | Gjøvik Technical College, Norway,  |
| tlf. mob.   952 62 567,       | Cellular...: +47 952 62 567,       |
| sentralbord 61 14 54 00.      | Switchboard: +47 61 14 54 00.      |
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