Re: [Lxc-users] help regarding lxc
hii The entry in host's fstab contains none /cgroup cgroup defaults 0 0s And i have deleted all entries from guest's fstab file The guest container is created abut when i exe it it shows following error lxc-execute -n guest -f /home/nishant/lxc/conf.guest /bin/bash lxc-execute: No such file or directory - failed to mount a new instance of '/dev/pts' lxc-execute: failed to setup the new pts instance lxc-execute: failed to setup the container lxc-execute: invalid sequence number 1. expected 2 lxc-execute: failed to spawn 'guest' Regards, Nishant. On Wed, Aug 24, 2011 at 3:00 PM, nishant mungse nishantmun...@gmail.comwrote: Hii all I am using lxc for creating containers. But when i create lxc container using lxc-create -n abc it creates a abc container and when i do lxc-info -n abc its show abc is stopped and when i perform lxc-start -n abc [-f conf file ] the terminal hangs and if do lxc-execute -n abc [-f conf file ] \bin\bash terminal hangs. It is not even working for /usr/bin/lxc-execute -n foo -f /usr/share/doc/lxc/examples/lxc-macvlan.conf /bin/bash. I am using UBUNTU 10.10. Plz help me ASAP. Regards, Nishant. -- EMC VNX: the world's simplest storage, starting under $10K The only unified storage solution that offers unified management Up to 160% more powerful than alternatives and 25% more efficient. Guaranteed. http://p.sf.net/sfu/emc-vnx-dev2dev___ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users
Re: [Lxc-users] help regarding lxc
Hi Nishant,
your rootfs is missing rootfs/dev/pts.
I use normaly following script: (replace rootfs with your location of the
container rootfs)
DEV=rootfs/dev
rm ${DEV}/null
rm ${DEV}/zero
mknod -m 666 ${DEV}/null c 1 3
mknod -m 666 ${DEV}/zero c 1 5
mknod -m 666 ${DEV}/random c 1 8
mknod -m 666 ${DEV}/urandom c 1 9
mkdir -m 755 ${DEV}/pts
mkdir -m 1777 ${DEV}/shm
mknod -m 666 ${DEV}/tty c 5 0
mknod -m 666 ${DEV}/tty0 c 4 0
mknod -m 666 ${DEV}/tty1 c 4 1
mknod -m 666 ${DEV}/full c 1 7
mknod -m 600 ${DEV}/initctl p
mknod -m 666 ${DEV}/ptmx c 5 2
With best regards Joerg
Am Montag, 29. August 2011, 13:22:28 schrieb nishant mungse:
hii
The entry in host's fstab contains
none /cgroup cgroup defaults 0 0s
And i have deleted all entries from guest's fstab file
The guest container is created abut when i exe it it shows following error
lxc-execute -n guest -f /home/nishant/lxc/conf.guest /bin/bash
lxc-execute: No such file or directory - failed to mount a new instance of
'/dev/pts'
lxc-execute: failed to setup the new pts instance
lxc-execute: failed to setup the container
lxc-execute: invalid sequence number 1. expected 2
lxc-execute: failed to spawn 'guest'
Regards,
Nishant.
On Wed, Aug 24, 2011 at 3:00 PM, nishant mungse
nishantmun...@gmail.comwrote:
Hii all
I am using lxc for creating containers.
But when i create lxc container using lxc-create -n abc it creates a
abc
container and when i do lxc-info -n abc its show abc is stopped and
when i perform lxc-start -n abc [-f conf file ] the terminal hangs
and if do lxc-execute -n abc [-f conf file ] \bin\bash terminal
hangs.
It is not even working for /usr/bin/lxc-execute -n foo -f
/usr/share/doc/lxc/examples/lxc-macvlan.conf /bin/bash.
I am using UBUNTU 10.10.
Plz help me ASAP.
Regards,
Nishant.
--
EMC VNX: the world's simplest storage, starting under $10K
The only unified storage solution that offers unified management
Up to 160% more powerful than alternatives and 25% more efficient.
Guaranteed. http://p.sf.net/sfu/emc-vnx-dev2dev
___
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Re: [Lxc-users] lxc-clone
Quoting Ramez Hanna (rha...@informatiq.org): Hi, I have started using lxc to setup a pre-production system instead of KVM at first glance clone seemd to me that it would copy everything to a new roots but turns out that in case of LVM it will snapshot AFAIK snapshots are meant more for backup or testing some changes and discarding them later do you think it makes sense if I modify the script in this way if user doesn't specify -s, then a new lv is created and copy all comtents to it, rather than snapshot which would work if user uses the -s option? Yes, I guess I didn't implement that bit yet, but not specifying -s was meant to do a simple copy. You'll probably want to check whether the original was a simple directory tree or an lvm, and only lvcreate if the original was an lvm. (then lxc-convert can offer conversion from one to the other.) -serge -- EMC VNX: the world's simplest storage, starting under $10K The only unified storage solution that offers unified management Up to 160% more powerful than alternatives and 25% more efficient. Guaranteed. http://p.sf.net/sfu/emc-vnx-dev2dev ___ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users
Re: [Lxc-users] lxc-clone
On Mon, Aug 29, 2011 at 4:19 PM, Serge Hallyn serge.hal...@canonical.com wrote: Quoting Ramez Hanna (rha...@informatiq.org): Hi, I have started using lxc to setup a pre-production system instead of KVM at first glance clone seemd to me that it would copy everything to a new roots but turns out that in case of LVM it will snapshot AFAIK snapshots are meant more for backup or testing some changes and discarding them later do you think it makes sense if I modify the script in this way if user doesn't specify -s, then a new lv is created and copy all comtents to it, rather than snapshot which would work if user uses the -s option? Yes, I guess I didn't implement that bit yet, but not specifying -s was meant to do a simple copy. You'll probably want to check whether the original was a simple directory tree or an lvm, and only lvcreate if the original was an lvm. (then lxc-convert can offer conversion from one to the other.) -serge I did implemet that patch submitted yesterday, would appreciate any comments -- Special Offer -- Download ArcSight Logger for FREE! Finally, a world-class log management solution at an even better price-free! And you'll get a free Love Thy Logs t-shirt when you download Logger. Secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsisghtdev2dev ___ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users
Re: [Lxc-users] [PATCH] multiple mods to lxc-clone
Thanks, Ramez. It looks good to me. My only comment would be that
if the rootfs copy fails (either rsync or lvm clone), and you've
frozen the original container, then you need to unfreeze the original
container before erroring out.
-serge
Quoting Ramez Hanna (rha...@informatiq.org):
* allow cloning of non-snapshot lvm devices
* if no -s then create a copy of the lvm block device and copy data
from the orig to the new container device
* first take a snapshot, then use this snapshot to copy data,
remove snapshot after done
* if orig container is running freeze it while copying
* in case lvm block device, the container is only frozen during
creation of snapshot ~1 sec
* use rsync -ax insted of cp -a
* in case copying a live contrainer it won't copy runtine mounted
files such as /proc, /sys and some /dev
* new opts
* fstype: type of fs for the newly created lvm device in case of
non-snapshot lvm
* lvprefix: prefix for new lvm device name.
* do not delete the lines lxc.mount by default
* check is fstab exists then copy it
* only modify lines that contain lxc.mount =, debian template
seems to not have that line but uses lxc.mount. lines which get
screwed
Signed-off-by: InformatiQ rha...@informatiq.org
---
src/lxc/lxc-clone.in | 98
++
1 files changed, 75 insertions(+), 23 deletions(-)
mode change 100644 = 100755 src/lxc/lxc-clone.in
diff --git a/src/lxc/lxc-clone.in b/src/lxc/lxc-clone.in
old mode 100644
new mode 100755
index 91944a0..d42160b
--- a/src/lxc/lxc-clone.in
+++ b/src/lxc/lxc-clone.in
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/bash
#
# lxc: linux Container library
@@ -22,7 +22,7 @@
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
usage() {
-echo usage: lxc-clone -o orig -n new [-s] [-h] [-L fssize]
[-v vgname]
+echo usage: lxc-clone -o orig -n new [-s] [-h] [-L fssize]
[-v vgname] [-p lxc_lv_prefix] [-t fstype]
}
help() {
@@ -36,15 +36,19 @@ help() {
echo -s : make the new rootfs a snapshot of the original
echo fssize : size if creating a new fs. By default, 2G
echo vgname : lvm volume group name, lxc by default
+echo lvprefix : lvm volume name prefix, none by default, e.g.
--lvprefix=lxc_ then new lxc lv name will be lxc_newname
+echo fstype : new container file system type, ext3 by
default (only works for non-snapshot lvm)
}
-shortoptions='ho:n:sL:v:'
-longoptions='help,orig:,name:,snapshot,fssize,vgname'
+shortoptions='ho:n:sL:v:p:t:'
+longoptions='help,orig:,name:,snapshot,fssize:,vgname:,lvprefix:,fstype:'
lxc_path=/var/lib/lxc
bindir=/usr/bin
snapshot=no
lxc_size=2G
lxc_vg=lxc
+lxc_lv_prefix=
+fstype=ext3
getopt=$(getopt -o $shortoptions --longoptions $longoptions -- $@)
if [ $? != 0 ]; then
@@ -63,6 +67,7 @@ while true; do
-s|--snapshot)
shift
snapshot=yes
+snapshot_opt=-s
;;
-o|--orig)
shift
@@ -84,6 +89,11 @@ while true; do
lxc_new=$1
shift
;;
+-p|--lvprefix)
+shift
+lxc_lv_prefix=$1
+shift
+;;
--)
shift
break;;
@@ -141,50 +151,92 @@ trap ${bindir}/lxc-destroy -n $lxc_new; echo
aborted; exit 1 SIGHUP SIGINT SIG
mkdir -p $lxc_path/$lxc_new
+hostname=$lxc_new
+
echo Tweaking configuration
cp $lxc_path/$lxc_orig/config $lxc_path/$lxc_new/config
sed -i '/lxc.utsname/d' $lxc_path/$lxc_new/config
echo lxc.utsname = $hostname $lxc_path/$lxc_new/config
-sed -i '/lxc.mount/d' $lxc_path/$lxc_new/config
-echo lxc.mount = $lxc_path/$lxc_new/fstab $lxc_path/$lxc_new/config
+grep lxc.mount = $lxc_path/$lxc_new/config /dev/null 21 { sed
-i '/lxc.mount =/d' $lxc_path/$lxc_new/config; echo lxc.mount =
$lxc_path/$lxc_new/fstab $lxc_path/$lxc_new/config; }
-cp $lxc_path/$lxc_orig/fstab $lxc_path/$lxc_new/fstab
-sed -i s@$lxc_path/$lxc_orig@$lxc_path/$lxc_new@ $lxc_path/$lxc_new/fstab
+if [ -e $lxc_path/$lxc_orig/fstab ];then
+cp $lxc_path/$lxc_orig/fstab $lxc_path/$lxc_new/fstab
+sed -i s@$lxc_path/$lxc_orig@$lxc_path/$lxc_new@
$lxc_path/$lxc_new/fstab
+fi
echo Copying rootfs...
rootfs=$lxc_path/$lxc_new/rootfs
# First figure out if the old is a device. For now we only support
# lvm devices.
mounted=0
+#is container running
+lxc-info -s -n $lxc_orig|grep RUNNING /dev/null 21
+if [ $? -ne 0 ]; then
+container_running=True
+fi
sed -i '/lxc.rootfs/d' $lxc_path/$lxc_new/config
oldroot=`grep lxc.rootfs $lxc_path/$lxc_orig/config | awk -F= '{ print $2 '}`
if [ -b $oldroot ]; then
# this is a device. If we don't want to snapshot, then mkfs, mount
# and rsync. Trivial but not yet implemented
- if [
