openstack/devstack
Code Issues Proposed changes

Clean up create_disk() a little

Browse Source 
The create_disk() helper had some redundant checks and dead code. This
refactors it to put all the stale cleanup at the top, and groups the
new actions together with more relevant comments to make it easier
to understand.

Change-Id: I1f6218a1994e66786ed9a8065e30bcceec7b8956
This commit is contained in:
Dan Smith 2020-11-13 06:57:33 -08:00
parent aef50ed18c
commit 36a575b036
1 changed files with 14 additions and 19 deletions
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33
functions
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@ -759,16 +759,14 @@ function create_disk {
local loopback_disk_size=${3}
local key
# Create a loopback disk and format it to XFS.
if [[ -e ${disk_image} ]]; then
if egrep -q ${storage_data_dir} /proc/mounts; then
sudo umount ${storage_data_dir}
sudo rm -f ${disk_image}
fi
fi
key=$(echo $disk_image | sed 's#/.##')
key="devstack-$key"
sudo mkdir -p ${storage_data_dir}/drives/images
destroy_disk $disk_image $storage_data_dir
# Create an empty file of the correct size (and ensure the
# directory structure up to that path exists)
sudo mkdir -p $(dirname ${disk_image})
sudo truncate -s ${loopback_disk_size} ${disk_image}
# Make a fresh XFS filesystem. Use bigger inodes so xattr can fit in
@ -778,16 +776,9 @@ function create_disk {
# Swift and Ceph.
sudo mkfs.xfs -f -i size=1024 ${disk_image}
# Unmount the target, if mounted
if egrep -q $storage_data_dir /proc/mounts; then
sudo umount $storage_data_dir
fi
# Clear any old fstab rules, install a new one for this disk, and mount it
key=$(echo $disk_image | sed 's#/.##')
key="devstack-$key"
sudo sed -i '/.*comment=$key.*/ d' /etc/fstab
# Install a new loopback fstab entry for this disk image, and mount it
echo "$disk_image $storage_data_dir xfs loop,noatime,nodiratime,logbufs=8,comment=$key 0 0" | sudo tee -a /etc/fstab
sudo mkdir -p $storage_data_dir
sudo mount -v $storage_data_dir
}
@ -795,6 +786,10 @@ function create_disk {
function destroy_disk {
local disk_image=$1
local storage_data_dir=$2
local key
key=$(echo $disk_image | sed 's#/.##')
key="devstack-$key"
# Unmount the target, if mounted
if egrep -q $storage_data_dir /proc/mounts; then
@ -802,10 +797,10 @@ function destroy_disk {
fi
# Clear any fstab rules
sed -i '/.*comment=$key.*/ d' /etc/fstab
sudo sed -i '/.*comment=$key.*/ d' /etc/fstab
# Delete the file
sudo rm $disk_image
sudo rm -f $disk_image
}