devel/google-perftools in a jail

[Andrea Venturoli]

On 4/5/21 8:57 AM, yuri at FreeBSD.org wrote:

> I tried to reproduce this problem, but couldn't.
> 
> 
> I created the jail with the command:
> 
> # jail -c path=/disk-huge/jail host.hostname=testjail ip4=inherit 
> command=/etc/rc

Hello.

I don't know how your "plain" jail works (thin or thick?); I'm using 
sysutils/ezjail.

ezjail shares a single base OS instance among each jail, overlayed with 
specific files.
I.e. it
_ creates /usr/jails/basejail with a copy of the base OS (think make -D 
/usrjails/basejail installworld)
_ creates each jail in /usr/jails/ e.g. /usr/jails/myjail and "mounts" 
basejail inside each with nullfs

E.g.
# zfs list|grep myjail
zroot/ezjail/myjail                129G   647G  74.9G  /usr/jails/myjail

#ls -l /usr/jails/myjail
total 45
-rw-r--r--   2 root  wheel  1089 Oct 30 15:49 .cshrc
-rw-r--r--   2 root  wheel   470 Oct 30 15:49 .profile
-rw-------   1 root  wheel  1024 Sep 12  2017 .rnd
-r--r--r--   1 root  wheel  6177 Oct 30 15:49 COPYRIGHT
drwxr-xr-x   9 root  wheel     9 May 18  2018 basejail
lrwxr-xr-x   1 root  wheel    13 Sep 12  2017 bin -> /basejail/bin
drwxr-xr-x  10 root  wheel    71 Mar 28 19:57 boot
dr-xr-xr-x  12 root  wheel   512 Mar 28 20:00 dev
drwxr-xr-x  27 root  wheel   110 Mar  6 12:11 etc
lrwxr-xr-x   1 root  wheel     9 Sep 12  2017 home -> usr/home/
lrwxr-xr-x   1 root  wheel    13 Sep 12  2017 lib -> /basejail/lib
lrwxr-xr-x   1 root  wheel    17 Sep 12  2017 libexec -> /basejail/libexec
drwxr-xr-x   2 root  wheel     2 Sep 12  2017 media
drwxr-xr-x   2 root  wheel     2 Sep 12  2017 mnt
drwxr-xr-x   2 root  wheel     2 Sep 12  2017 net
dr-xr-xr-x   1 root  wheel     0 Apr  5 09:49 proc
lrwxr-xr-x   1 root  wheel    16 Sep 12  2017 rescue -> /basejail/rescue
drwx------   3 root  wheel    11 Apr  2 19:02 root
lrwxr-xr-x   1 root  wheel    14 Sep 12  2017 sbin -> /basejail/sbin
lrwxr-xr-x   1 root  wheel    11 Sep 12  2017 sys -> usr/src/sys
drwxrwxrwt  10 root  wheel    12 Apr  5 07:05 tmp
drwxr-xr-x   6 root  wheel    16 Feb 27  2019 usr
drwxr-xr-x  26 root  wheel    26 Mar 28 20:00 var

# mount -t nullfs|grep myjail
/usr/jails/basejail on /usr/jails/myjail/basejail (nullfs, local, read-only)



Does your plain jail do the same?

  bye & Thanks
	av.

P.S. I repeat I solved in another way, so don't get mad at this unless 
it's in your interest.