[hobbit] selinux policy

[Buchan Milne]

On Monday 25 February 2008 20:08:11 Martin Flemming wrote:
> On Mon, 25 Feb 2008, Buchan Milne wrote:
> > On Monday 25 February 2008 14:35:13 Martin Flemming wrote:
> >> Hi !
> >>
> >> Is there any selinux-policy for hobbit available
> >> or can somebody point me to a solution for it .... ?
> >> .. beside to disable it :-)
> >
> > I don't think a policy should be necessary in targeted mode, but chcon
> > might need to be run with the right options to set the right context on
> > the relevant directories/files.
>
> fine, i'm not familiar with selinux,
> but for a new Analysis-Farm we should build up, it's the default with
>
> SELINUX=enforcing
> SELINUXTYPE=targeted
>
> > Can you give the selinux error message you get ? And, how did you install
> > Hobbit ?
>
> And one more detail, i've got the problem on my new separate server,
> if i want to execute the cgi's
>
> e.g.
> hobbit-nkview.sh
> bb-findhost.sh
> .
> ....and so on ...
>
> error-messages in /var/log/audit/audit.log
>
> type=AVC msg=audit(1203959305.541:42): avc:  denied  { execute_no_trans }
> for  pid=2027 comm="httpd" path="/usr/lib/hobbit/cgi-bin/hobbit-nkview.sh"
> dev=xvda2 ino=553808 scontext=root:system_r:httpd_t:s0
> tcontext=system_u:object_r:lib_t:s0 tclass=file type=SYSCALL
> msg=audit(1203959305.541:42): arch=c000003e syscall=59 success=no exit=-13
> a0=55555dd9ea80 a1=55555dda02b0 a2=55555dda02c8 a3=0 items=0 ppid=1841
> pid=2027 auid=0 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48
> fsgid=48 tty=(none) comm="httpd" exe="/usr/sbin/httpd"
> subj=root:system_r:httpd_t:s0 key=(null)
>
> or
>
> type=AVC msg=audit(1203959921.164:50): avc:  denied  { execute_no_trans }
> for  pid=2184 comm="httpd" path="/usr/lib/hobbit/cgi-bin/bb-findhost.sh"
> dev=xvda2 ino=553797 scontext=root:system_r:httpd_t:s0
> tcontext=system_u:object_r:lib_t:s0 tclass=file type=SYSCALL
> msg=audit(1203959921.164:50): arch=c000003e syscall=59 success=no exit=-13
> a0=55555dd9ea78 a1=55555dda0298 a2=55555dda02b0 a3=0 items=0 ppid=1843
> pid=2184 auid=0 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48
> fsgid=48 tty=(none) comm="httpd" exe="/usr/sbin/httpd"
> subj=root:system_r:httpd_t:s0 key=(null)
>
>
> Also, if i want to see the cpu-graph etc.....
>
> type=AVC msg=audit(1203960082.238:51): avc:  denied  { execute_no_trans }
> for  pid=2217 comm="httpd" path="/usr/lib/hobbit/cgi-bin/bb-hostsvc.sh"
> dev=xvda2 ino=553800 scontext=root:system_r:httpd_t:s0
> tcontext=system_u:object_r:lib_t:s0 tclass=file type=SYSCALL
> msg=audit(1203960082.238:51): arch=c000003e syscall=59 success=no exit=-13
> a0=55555dd9ead8 a1=55555dda0310 a2=55555dda0328 a3=0 items=0 ppid=1844
> pid=2217 auid=0 uid=48 gid=48 euid=48 suid=48 fsuid=48 egid=48 sgid=48
> fsgid=48 tty=(none) comm="httpd" exe="/usr/sbin/httpd"
> subj=root:system_r:httpd_t:s0 key=(null)
>
> While, if i disabled selinux, i haven't got that problem ..

I assisted someone in setting up Hobbit on a system that had selinux enabled, 
and this was what I needed to do to get it to work correctly:

chcon -t httpd_sys_script_exec_t /usr/lib/hobbit/cgi-bin/*
chcon -t httpd_sys_script_exec_t /usr/lib/hobbit/cgi-secure/*
chcon -R -t httpd_sys_script_ro_t /var/lib/hobbit/rrd/

(besides usual file permissions issues).

I will try and see if I can ensure this isn't necessary (either setting the 
contexts during the package build, or in a postinstall script) for my own 
hobbit RPMS, if it works, I may make the packages available.

Regards,
Buchan