[lxc-users] Unavailable loop devices
Michael H. Warfield
mhw at WittsEnd.com
Tue May 6 15:10:00 UTC 2014
On Tue, 2014-05-06 at 14:59 +0000, Serge Hallyn wrote:
> Nak. Not until we hear more from Seth about his devloop or
> namespaced devtmpfs. Although a commented-out pair of lines
> with an explanation above it would be ok.
Concur. And you and I both know, from what Greg K-H has said face to
face with all of us present, that they'll be singing Jingle Bells in
Hades before we get namespaced devtmpfs. Not saying it's impossible but
I'm not holding my breath. He said "not no, hell no". I am looking
forward to this devloop thing though.
Regards,
Mike
> Quoting CDR (venefax at gmail.com):
> > Dear Mike
> > It does work indeed.
> > I suggest that the developers add these two lines to the sample configuration.
> > Yours
> > Philip
> >
> > On Tue, May 6, 2014 at 9:28 AM, Michael H. Warfield <mhw at wittsend.com> wrote:
> > > On Tue, 2014-05-06 at 06:25 -0400, CDR wrote:
> > >> Dear Friends
> > >
> > >> I succesfully created a SLES 11 SP3 container, but when I try to do this
> > >
> > >> mount -o loop /images/SLE-11-SP3-SDK-DVD-x86_64-GM-DVD1.iso /media
> > >
> > >> mount: Could not find any loop device. Maybe this kernel does not know
> > >> about the loop device? (If so, recompile or `modprobe loop'.)
> > >
> > > Add the following to your container configuration file:
> > >
> > > lxc.cgroup.devices.allow = c 10:137 rwm # loop-control
> > > lxc.cgroup.devices.allow = b 7:* rwm # loop*
> > >
> > > Then make sure you have the following devices in your container /dev
> > > directory...
> > >
> > > brw-rw----. 1 root disk 7, 0 May 2 13:03 /dev/loop0
> > > brw-rw----. 1 root disk 7, 1 May 2 13:03 /dev/loop1
> > > brw-rw----. 1 root disk 7, 2 May 2 13:03 /dev/loop2
> > > brw-rw----. 1 root disk 7, 3 May 2 13:03 /dev/loop3
> > > crw-------. 1 root root 10, 237 May 2 13:03 /dev/loop-control
> > >
> > > Regards,
> > > Mike
> > >
> > >> My host is Fedora 20 and the LXC version is
> > >
> > >> rpm -qa | grep lxc
> > >> libvirt-daemon-lxc-1.1.3.4-4.fc20.x86_64
> > >> libvirt-daemon-driver-lxc-1.1.3.4-4.fc20.x86_64
> > >> lxc-devel-1.0.0-1.fc20.x86_64
> > >> lxc-debuginfo-1.0.0-1.fc20.x86_64
> > >> lxc-libs-1.0.0-1.fc20.x86_64
> > >> lxc-1.0.0-1.fc20.x86_64
> > >
> > >> the configuration is:
> > >>
> > >> lxc.start.auto = 0
> > >> lxc.start.delay = 5
> > >> lxc.start.order = 10
> > >>
> > >> # When using LXC with apparmor, uncomment the next line to run unconfined:
> > >> #lxc.aa_profile = unconfined
> > >>
> > >> lxc.cgroup.devices.deny = a
> > >> # /dev/null and zero
> > >> lxc.cgroup.devices.allow = c 1:3 rwm
> > >> lxc.cgroup.devices.allow = c 1:5 rwm
> > >> # consoles
> > >> lxc.cgroup.devices.allow = c 5:1 rwm
> > >> lxc.cgroup.devices.allow = c 5:0 rwm
> > >> lxc.cgroup.devices.allow = c 4:0 rwm
> > >> lxc.cgroup.devices.allow = c 4:1 rwm
> > >> # /dev/{,u}random
> > >> lxc.cgroup.devices.allow = c 1:9 rwm
> > >> lxc.cgroup.devices.allow = c 1:8 rwm
> > >> lxc.cgroup.devices.allow = c 136:* rwm
> > >> lxc.cgroup.devices.allow = c 5:2 rwm
> > >> # rtc
> > >> lxc.cgroup.devices.allow = c 254:0 rwm
> > >>
> > >> # mounts point
> > >> lxc.mount.entry = proc proc proc nodev,noexec,nosuid 0 0
> > >> lxc.mount.entry = sysfs sys sysfs defaults 0 0
> > >> lxc.mount.entry = /images /var/lib/lxc/utel-kde/rootfs/images none bind 0 0
> > >>
> > >>
> > >> lxc.network.type=macvlan
> > >> lxc.network.macvlan.mode=bridge
> > >> lxc.network.link=eth1
> > >> lxc.network.flags=up
> > >> lxc.network.hwaddr = e2:91:a8:17:97:e4
> > >> lxc.network.ipv4 = 0.0.0.0/21
> > >>
> > >>
> > >> How do make the kernel loop module available for the container?
> > >>
> > >> Yours
> > >> Philip
> > >> _______________________________________________
> > >> lxc-users mailing list
> > >> lxc-users at lists.linuxcontainers.org
> > >> http://lists.linuxcontainers.org/listinfo/lxc-users
> > >
> > > --
> > > Michael H. Warfield (AI4NB) | (770) 978-7061 | mhw at WittsEnd.com
> > > /\/\|=mhw=|\/\/ | (678) 463-0932 | http://www.wittsend.com/mhw/
> > > NIC whois: MHW9 | An optimist believes we live in the best of all
> > > PGP Key: 0x674627FF | possible worlds. A pessimist is sure of it!
> > >
> > >
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--
Michael H. Warfield (AI4NB) | (770) 978-7061 | mhw at WittsEnd.com
/\/\|=mhw=|\/\/ | (678) 463-0932 | http://www.wittsend.com/mhw/
NIC whois: MHW9 | An optimist believes we live in the best of all
PGP Key: 0x674627FF | possible worlds. A pessimist is sure of it!
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