Difference between revisions of "Cloning ploop containers"
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(fixed vz7 script; added a note on disk space) |
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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 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. This might be useful for example in testing. | + | 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 == | == Legacy OpenVZ == | ||
| Line 34: | Line 34: | ||
# Need to run <code>vzpkg</code> instead of <code>vztmpl-dl</code> | # Need to run <code>vzpkg</code> instead of <code>vztmpl-dl</code> | ||
# Need to remove <code>VEID=</code> line from the "donor" config file | # Need to remove <code>VEID=</code> line from the "donor" config file | ||
| − | # Need to copy <code>.ve.layout</code> from the donor private area | + | # Need to copy <code>.ve.layout</code> from the donor private area# |
| + | # Base delta name is <code>root.hds</code> not <code>root.hdd</code> | ||
<source lang="bash"> | <source lang="bash"> | ||
| Line 52: | Line 53: | ||
for CT in $(seq 1000 2000); do \ | for CT in $(seq 1000 2000); do \ | ||
mkdir -p /vz/private/$CT/root.hdd /vz/root/$CT; \ | mkdir -p /vz/private/$CT/root.hdd /vz/root/$CT; \ | ||
| − | ln /vz/private/$SRCID/root.hdd/root. | + | 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 -nr /vz/private/$SRCID/root.hdd /vz/private/$CT/; \ | ||
cp /etc/vz/conf/$SRCID.conf /etc/vz/conf/$CT.conf; \ | cp /etc/vz/conf/$SRCID.conf /etc/vz/conf/$CT.conf; \ | ||
cp -a /vz/private/50/.ve.layout /vz/private/$CT/; \ | cp -a /vz/private/50/.ve.layout /vz/private/$CT/; \ | ||
done | done | ||
| + | |||
| + | vzctl set $SRCID --disabled yes --save # make sure we don't use it | ||
</source> | </source> | ||
Revision as of 01:18, 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
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 itVZ7
The differences from the above script are:
- Need to run
vzpkginstead ofvztmpl-dl - Need to remove
VEID=line from the "donor" config file - Need to copy
.ve.layoutfrom the donor private area# - Base delta name is
root.hdsnotroot.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