Difference between revisions of "Cloning ploop containers"
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vzctl set $SRCID --disabled yes --save # make sure we don't use it | vzctl set $SRCID --disabled yes --save # make sure we don't use it | ||
</source> | </source> | ||
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+ | [[Category: Storage]] |
Latest revision as of 10:35, 1 September 2015
This describes a non-official and unsupported method of cloning ploop containers. It uses shared base ploop delta (this configuration is not officially supported but apparently works just fine).
This method lets you very quickly create thousands of identical containers, saving a lot of disk space as well. This might be useful for example in testing, but should not be used in production.
Legacy OpenVZ[edit]
SRCID=50 # "Donor" container ID
TMPL=centos-6-x86_64 # Template to use
vztmpl-dl $TMPL # make sure we use the latest one
vzctl create $SRCID --ostemplate $TMPL
vzctl mount $SRCID
while killall -0 ext4lazyinit; do sleep 1; done
vzctl umount $SRCID
vzctl snapshot $SRCID
for CT in $(seq 1000 2000); do \
mkdir -p /vz/private/$CT/root.hdd /vz/root/$CT; \
ln /vz/private/$SRCID/root.hdd/root.hdd /vz/private/$CT/root.hdd/root.hdd; \
cp -nr /vz/private/$SRCID/root.hdd /vz/private/$CT/; \
cp /etc/vz/conf/$SRCID.conf /etc/vz/conf/$CT.conf; \
done
vzctl set $SRCID --disabled yes --save # make sure we don't use it
VZ7[edit]
The differences from the above script are:
- Need to run
vzpkg
instead ofvztmpl-dl
- Need to remove
VEID=
line from the "donor" config file - Need to copy
.ve.layout
from the donor private area# - Base delta name is
root.hds
notroot.hdd
SRCID=50 # "Donor" container ID
TMPL=centos-6-x86_64 # Template to use
vzpkg update cache $TMPL # make sure we use the latest one
vzctl create $SRCID --ostemplate $TMPL
vzctl mount $SRCID
while killall -0 ext4lazyinit; do sleep 1; done
vzctl umount $SRCID
vzctl snapshot $SRCID
sed -ie '/^VEID=/d' /etc/vz/conf/$SRCID.conf
for CT in $(seq 1000 2000); do \
mkdir -p /vz/private/$CT/root.hdd /vz/root/$CT; \
ln /vz/private/$SRCID/root.hdd/root.hds /vz/private/$CT/root.hdd/root.hds; \
cp -nr /vz/private/$SRCID/root.hdd /vz/private/$CT/; \
cp /etc/vz/conf/$SRCID.conf /etc/vz/conf/$CT.conf; \
cp -a /vz/private/50/.ve.layout /vz/private/$CT/; \
done
vzctl set $SRCID --disabled yes --save # make sure we don't use it