Comments on: LXC Configure Ubuntu Lucid Containers

By: Mark

Mark — Mon, 09 Aug 2010 09:31:34 +0000

Still a problem with the rc-sysinit script

cat < /lxc/rootfs.ubuntu/init/rc-sysinit

should be

cat < /lxc/rootfs.ubuntu/etc/init/rc-sysinit

Even with this correction the script does not start when starting the container. I have to run it manually to set the gateway. Any ideas?

By: Nikola

Nikola — Thu, 15 Jul 2010 17:57:23 +0000

Hello everyone,
First tnx for the great tutorial, I am very new to LXCs and I have few questions regarding it:

1.I cannot start mysql …. when I use chroot I get “ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/run/mysqld/mysqld.sock’ (111) ” and when I use container on the same rootfs “lxc-staer -n name /bin/bash” i get “ERROR 2002 (HY000): Can’t connect to local MySQL server through socket ‘/var/run/mysqld/mysqld.sock’ (2)” (In the second case there is no /var/run/mysqld) … pretty weird huh, I cant see what I am doing wrong?
2. When I do lxc-start -n name after configuration…. it blocks, so I must run it with lxc-start -n name /bin/bash, does anyone knows why is that so?
3.When I try using lxc-execute it says that smt. is wrong with cgroup, why is that so?

Thank you VERY much in advance, every solution will be appreciated,
Nikola

By: bodhi.zazen

bodhi.zazen — Thu, 08 Jul 2010 19:46:09 +0000

Thank you two, will fix that.

By: SGI

SGI — Thu, 08 Jul 2010 15:41:23 +0000

chmod a+x /lxc/rootfs.ubuntu/init/rc-sysinit
should be
chmod a+x /lxc/rootfs.ubuntu/etc/init/rc-sysinit

By: Sean Whitney

Sean Whitney — Wed, 07 Jul 2010 22:38:16 +0000

/lxc/rootfs.ubuntu/init/rc-sysinit should be
/lxc/rootfs.ubuntu/etc/init/rc-sysinit

By: steve

steve — Tue, 22 Jun 2010 15:38:43 +0000

yes, i found the same problem… but kernel 2.6.32-r7 works without user-cr

By: zenny

zenny — Sat, 05 Jun 2010 06:41:13 +0000

changing the netmask and IP didn’t help either. Seems LXC is yet at par with ovz :-(

By: bodhi.zazen

bodhi.zazen — Fri, 04 Jun 2010 23:45:18 +0000

Looks fine so long as the network line is correct :

lxc.network.ipv4 = 192.168.0.10/24

This line sets the ip address of the container and netmask.

By: zenny

zenny — Fri, 04 Jun 2010 20:04:08 +0000

I made /lxc/config.ubuntu which looks like:

lxc.utsname = ubuntu
lxc.tty = 4
lxc.network.type = veth
lxc.network.flags = up
lxc.network.link = br0
lxc.network.name = eth0
lxc.network.mtu = 1500
lxc.network.ipv4 = 192.168.20.0/24
lxc.rootfs = /lxc/rootfs.ubuntu
lxc.mount = /lxc/fstab.ubuntu
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
# /dev/pts/* – pts namespaces are “coming soon”
lxc.cgroup.devices.allow = c 136:* rwm
lxc.cgroup.devices.allow = c 5:2 rwm
# rtc
lxc.cgroup.devices.allow = c 254:0 rwm

And /lxc/fstab.ubuntu which looks like:

none /lxc/rootfs.ubuntu/dev/pts devpts defaults 0 0
none /lxc/rootfs.ubuntu/proc proc defaults 0 0
none /lxc/rootfs.ubuntu/sys sysfs defaults 0 0
none /lxc/rootfs.ubuntu/var/lock tmpfs defaults 0 0
none /lxc/rootfs.ubuntu/var/run tmpfs defaults 0 0
/etc/resolv.conf /lxc/rootfs.ubuntu/etc/resolv.conf none bind 0 0

Is there anything else that I need to create?

By: bodhi.zazen

bodhi.zazen — Fri, 04 Jun 2010 18:40:40 +0000

@zenny -

Did you make a configuration file for your lucid template ?