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docker-storage-setup: If metadata volume already exists, do not create new one #40

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Jun 9, 2015
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docker-storage-setup: If metadata volume already exists, do not create new one #40

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10 changes: 10 additions & 0 deletions docker-storage-setup.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -78,6 +78,16 @@ EOF
}

create_metadata_lv() {
# If metadata lvm already exists (failures from previous run), then
# don't create it.
# TODO: Modify script to cleanup meta and data lvs if failure happened
# later. Don't exit with error leaving partially created lvs behind.

if lvs -a $VG/${META_LV_NAME} --noheadings &>/dev/null; then
echo "Metadata volume $META_LV_NAME already exists. Not creating a new one."
return 0
fi

# Reserve 0.1% of the free space in the VG for docker metadata.
# Calculating the based on actual data size might be better, but is
# more difficult do to the range of possible inputs.
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