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ForumGeneral: GeneralDelete clone parent?

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Delete clone parent?

chrisldavis@chrisldavis

17 Posts

#1 · February 12, 2022, 7:54 am

I created an antlet that was originally cloned from another antlet. It looks like a snapshot was made of the original antlet and used to create the clone. Now when I try to delete the original antlet it says "[antlet] has dependencies that must be deleted. Would you like to delete this antlet along with the following dependencies?"

If I try to just delete the snapshot, I get this message: "DSNAP-1: Error while trying to delete the snapshot. cannot destroy 'antlets/[antlet]@[snapshot]': snapshot has dependent clones".

I don't want to delete the new antlet, just the old one. Is it possible to simply "decouple" the snapshot from the clone? Is that an option?

daniel.luck has reacted to this post.

daniel.luck@daniel-luck

552 Posts

Antsle Staff

#2 · February 14, 2022, 3:16 pm

Quote from daniel.luck on February 14, 2022, 3:16 pm
Hi @chrisldavis

One of our talented teammates, Mario, has written to script to remove the zfs dependences on an antlet.

You can copy this script to your antsle and mark it as executable:

chmod +x rmzfsdeps

rmzfsdeps antlet_name

Once the zfs dependencies have been removed, you should be able to remove the old antlet.

#!/bin/bash

if [ $# -ne 1 ]; then
echo "Usage: rmzfsdeps <antlet-name>"
echo " "
exit 1
fi

antlet_name=$1

#######################################################
# Functions

# Text color
red=$'\e[1;31m'
grn=$'\e[1;32m'
wht=$'\e[1;0m'

isAntlet() {
# Desc: Verify the antlet exists
# Args: $1 -> name of the antlet

antlet_name=$1

if [ `virsh -c qemu:///system list --name --all | grep "^${antlet_name}$"|wc -l` -eq "1" ]; then
echo "true"
return 0
elif [ `virsh -c lxc:/// list --name --all | grep "^${antlet_name}$"|wc -l` -eq "1" ]; then
echo "true"
return 0
else
echo "false"
return 1
fi
}

isAntletRunning() {
# Desc: Verify the antlet exists
# Args: $1 -> name of the antlet

antlet_name=$1

if [ `virsh -c qemu:///system list --name | grep "^${antlet_name}$"|wc -l` -eq "1" ]; then
echo "true"
return 0
elif [ `virsh -c lxc:/// list --name | grep "^${antlet_name}$"|wc -l` -eq "1" ]; then
echo "true"
return 0
else
echo "false"
return 1
fi
}

antletType() {
# Desc: Get the antlet type - qemu or lxc
# Args: $1 -> name of the antlet

antlet_name=$1

if [ `virsh -c qemu:///system list --name --all | grep "^${antlet_name}$"|wc -l` -eq "1" ]; then
echo "qemu"
return 0
elif [ `virsh -c lxc:/// list --name --all|grep "^${antlet_name}$"|wc -l` -eq "1" ]; then
echo "lxc"
return 0
else
echo ""
return 1
fi
}

getAntletZpool() {
# Desc: get the zpool name of the antlet
# Args: $1 -> antlet name

echo `zfs list -H -o name | grep "/${1}$" | cut -d '/' -f1`
}

######################################################################

# Does antlet exist
if [ `isAntlet $antlet_name` == "false" ]; then
echo "antlet '${antlet_name}' does ${red}not exist!${wht}"
exit 1
fi

# Is the antlet running
if [ `isAntletRunning $antlet_name` == "true" ]; then
echo "'${red}${antlet_name}' is running!${wht} Please stop the antlet before running this script!"
exit 1
fi

# Set virsh cmd
if [ `antletType $antlet_name` == "lxc" ]; then
virshcmd="virsh -c lxc:///"
else
virshcmd="virsh -c qemu:///system"
fi

# Get antlet zpool
antlet_zpool=`getAntletZpool $antlet_name`

# Backup xml to antlet directory
$virshcmd dumpxml $antlet_name > /${antlet_zpool}/${antlet_name}/${antlet_name}.antlet.xml

# create snapshot
zfs snapshot ${antlet_zpool}/${antlet_name}@rmzfsdeps

# v undefine
$virshcmd undefine $antlet_name

# rename zfs with temporary name
zfs rename ${antlet_zpool}/${antlet_name} ${antlet_zpool}/${antlet_name}.tmp

# zfs send/recv
zfs send ${antlet_zpool}/${antlet_name}.tmp@rmzfsdeps | zfs recv ${antlet_zpool}/${antlet_name}

# Re-define antlet
$virshcmd define /${antlet_zpool}/${antlet_name}/${antlet_name}.antlet.xml

# destroy the snap
zfs destroy ${antlet_zpool}/${antlet_name}@rmzfsdeps

# destroy orig zfs
zfs destroy -r ${antlet_zpool}/${antlet_name}.tmp

Thanks,
antsle Support

Hi @chrisldavis

One of our talented teammates, Mario, has written to script to remove the zfs dependences on an antlet.

You can copy this script to your antsle and mark it as executable:

chmod +x rmzfsdeps

rmzfsdeps antlet_name

Once the zfs dependencies have been removed, you should be able to remove the old antlet.

#!/bin/bash

if [ $# -ne 1 ]; then
echo "Usage: rmzfsdeps <antlet-name>"
echo " "
exit 1
fi

antlet_name=$1

#######################################################
# Functions

# Text color
red=$'\e[1;31m'
grn=$'\e[1;32m'
wht=$'\e[1;0m'

isAntlet() {
# Desc: Verify the antlet exists
# Args: $1 -> name of the antlet

antlet_name=$1

if [ `virsh -c qemu:///system list --name --all | grep "^${antlet_name}$"|wc -l` -eq "1" ]; then
echo "true"
return 0
elif [ `virsh -c lxc:/// list --name --all | grep "^${antlet_name}$"|wc -l` -eq "1" ]; then
echo "true"
return 0
else
echo "false"
return 1
fi
}

isAntletRunning() {
# Desc: Verify the antlet exists
# Args: $1 -> name of the antlet

antlet_name=$1

if [ `virsh -c qemu:///system list --name | grep "^${antlet_name}$"|wc -l` -eq "1" ]; then
echo "true"
return 0
elif [ `virsh -c lxc:/// list --name | grep "^${antlet_name}$"|wc -l` -eq "1" ]; then
echo "true"
return 0
else
echo "false"
return 1
fi
}

antletType() {
# Desc: Get the antlet type - qemu or lxc
# Args: $1 -> name of the antlet

antlet_name=$1

if [ `virsh -c qemu:///system list --name --all | grep "^${antlet_name}$"|wc -l` -eq "1" ]; then
echo "qemu"
return 0
elif [ `virsh -c lxc:/// list --name --all|grep "^${antlet_name}$"|wc -l` -eq "1" ]; then
echo "lxc"
return 0
else
echo ""
return 1
fi
}

getAntletZpool() {
# Desc: get the zpool name of the antlet
# Args: $1 -> antlet name

echo `zfs list -H -o name | grep "/${1}$" | cut -d '/' -f1`
}

######################################################################

# Does antlet exist
if [ `isAntlet $antlet_name` == "false" ]; then
echo "antlet '${antlet_name}' does ${red}not exist!${wht}"
exit 1
fi

# Is the antlet running
if [ `isAntletRunning $antlet_name` == "true" ]; then
echo "'${red}${antlet_name}' is running!${wht} Please stop the antlet before running this script!"
exit 1
fi

# Set virsh cmd
if [ `antletType $antlet_name` == "lxc" ]; then
virshcmd="virsh -c lxc:///"
else
virshcmd="virsh -c qemu:///system"
fi

# Get antlet zpool
antlet_zpool=`getAntletZpool $antlet_name`

# Backup xml to antlet directory
$virshcmd dumpxml $antlet_name > /${antlet_zpool}/${antlet_name}/${antlet_name}.antlet.xml

# create snapshot
zfs snapshot ${antlet_zpool}/${antlet_name}@rmzfsdeps

# v undefine
$virshcmd undefine $antlet_name

# rename zfs with temporary name
zfs rename ${antlet_zpool}/${antlet_name} ${antlet_zpool}/${antlet_name}.tmp

# zfs send/recv
zfs send ${antlet_zpool}/${antlet_name}.tmp@rmzfsdeps | zfs recv ${antlet_zpool}/${antlet_name}

# Re-define antlet
$virshcmd define /${antlet_zpool}/${antlet_name}/${antlet_name}.antlet.xml

# destroy the snap
zfs destroy ${antlet_zpool}/${antlet_name}@rmzfsdeps

# destroy orig zfs
zfs destroy -r ${antlet_zpool}/${antlet_name}.tmp

Thanks,
antsle Support

lancem and chrisldavis have reacted to this post.