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image-builder: Allow to specify root partition free space

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There is no way to specify the remaining free space of the root partition.
It can vary depending on the upper bound size of the image aligned to 128MB
and the size of the root filesystem.
The following patch allow the user to specify that at least a certain amount
of space (defined in MB) will be kept in the root partition.

Fixes: #45

Signed-off-by: Erick Cardona <erick.cardona.ruiz@intel.com>
This commit is contained in:
Erick Cardona
2018-02-14 14:27:40 -06:00
parent 9699fe43a7
commit ea4063095d
1 changed files with 9 additions and 2 deletions
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11
image-builder/image_builder.sh
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@@ -57,6 +57,7 @@ Options:
-h Show this help
-o path to generate image file ENV: IMAGE
-s Image size in MB ENV: IMG_SIZE
-r Free space of the root partition in MB ENV: ROOT_FREE_SPACE
Extra environment variables:
AGENT_BIN: use it to change the expected agent binary name
@@ -79,11 +80,12 @@ MEM_BOUNDARY=128
MAX_ATTEMPTS=5
ATTEMPT_NUM=0
while getopts "ho:s:f:" opt
while getopts "ho:r:s:f:" opt
do
case "$opt" in
h) usage ;;
o) IMAGE="${OPTARG}" ;;
r) ROOT_FREE_SPACE="${OPTARG}" ;;
s) IMG_SIZE=${OPTARG}
if [ ${IMG_SIZE} -le 0 ]; then
die "Image size has to be greater than 0 MB."
@@ -162,6 +164,11 @@ calculate_img_size()
{
IMG_SIZE=${IMG_SIZE:-$MEM_BOUNDARY}
align_memory
if [ -n "$ROOT_FREE_SPACE" ] && [ "$IMG_SIZE" -gt "$ROOTFS_SIZE" ]; then
info "Ensure that root partition has at least ${ROOT_FREE_SPACE}MB of free space"
IMG_SIZE=$(($IMG_SIZE + $ROOT_FREE_SPACE))
fi
}
# Cleanup
@@ -244,4 +251,4 @@ OK "rootfs copied"
cleanup
info "Image created. Size: ${IMG_SIZE}MB."
info "Image created. Virtual size: ${IMG_SIZE}MB."