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Reduce Linux box size by not packing a swap partition gubbish #281

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merged 1 commit into from
Oct 17, 2014
Merged

Reduce Linux box size by not packing a swap partition gubbish #281

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2 changes: 1 addition & 1 deletion packer/freebsd-10.0-amd64.json
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,7 @@
"scripts/common/chef.sh",
"scripts/freebsd/cleanup.sh",
"scripts/freebsd/vmtools.sh",
"scripts/common/minimize.sh"
"scripts/freebsd/minimize.sh"
],
"execute_command": "export {{.Vars}} && cat {{.Path}} | su -m"
}
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2 changes: 1 addition & 1 deletion packer/freebsd-10.0-i386.json
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,7 @@
"scripts/common/chef.sh",
"scripts/freebsd/cleanup.sh",
"scripts/freebsd/vmtools.sh",
"scripts/common/minimize.sh"
"scripts/freebsd/minimize.sh"
],
"execute_command": "export {{.Vars}} && cat {{.Path}} | su -m"
}
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2 changes: 1 addition & 1 deletion packer/freebsd-9.3-amd64.json
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Expand Up @@ -105,7 +105,7 @@
"scripts/freebsd/vmtools.sh",
"scripts/common/chef.sh",
"scripts/freebsd/cleanup.sh",
"scripts/common/minimize.sh"
"scripts/freebsd/minimize.sh"
],
"type": "shell"
}
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2 changes: 1 addition & 1 deletion packer/freebsd-9.3-i386.json
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Expand Up @@ -102,7 +102,7 @@
"scripts/freebsd/vmtools.sh",
"scripts/common/chef.sh",
"scripts/freebsd/cleanup.sh",
"scripts/common/minimize.sh"
"scripts/freebsd/minimize.sh"
],
"type": "shell"
}
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8 changes: 8 additions & 0 deletions packer/scripts/common/minimize.sh
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@@ -1,5 +1,13 @@
#!/bin/sh -eux

# Whiteout the swap partition to reduce box size
# Swap is disabled till reboot
readonly swapuuid=$(/sbin/blkid -o value -l -s UUID -t TYPE=swap)
readonly swappart=$(readlink -f /dev/disk/by-uuid/"$swapuuid")
/sbin/swapoff "$swappart"
dd if=/dev/zero of="$swappart" bs=1M || echo "dd exit code $? is suppressed"
/sbin/mkswap -U "$swapuuid" "$swappart"

dd if=/dev/zero of=/EMPTY bs=1M
rm -f /EMPTY
# Block until the empty file has been removed, otherwise, Packer
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7 changes: 7 additions & 0 deletions packer/scripts/freebsd/minimize.sh
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@@ -0,0 +1,7 @@
#!/bin/sh -eux

dd if=/dev/zero of=/EMPTY bs=1M
rm -f /EMPTY
# Block until the empty file has been removed, otherwise, Packer
# will try to kill the box while the disk is still full and that's bad
sync