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Misc image tool script improvements #264

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Mar 18, 2024
Merged

Misc image tool script improvements #264

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2 changes: 1 addition & 1 deletion tools/bin/capture-docker-stack
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Expand Up @@ -17,7 +17,7 @@ DOCKER_IMAGE_VERSION=$(docker inspect "${DOCKER_IMAGE}" | jq .[].Id | cut -d ':'
# The `--user root` is required since the images for newer stacks default to a non-root user.
DOCKER_IMAGE_SIZE_IN_MB=$(docker run --rm --platform linux/amd64 --user root "${DOCKER_IMAGE}" du -sx --block-size=M | cut -d 'M' -f 1)

IMG_BASE=${STACK_NAME}64-$STACK_VERSION-$DOCKER_IMAGE_VERSION
IMG_BASE=${STACK_NAME}-$STACK_VERSION-$DOCKER_IMAGE_VERSION
IMG=/tmp/$IMG_BASE.img
IMG_MNT=/tmp/$IMG_BASE
IMG_GZ=/tmp/$IMG_BASE.img.gz
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8 changes: 8 additions & 0 deletions tools/bin/make-filesystem-image
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Expand Up @@ -21,5 +21,13 @@ mkdir -p "$(dirname "$IMG")"
# https://unix.stackexchange.com/a/121888
fallocate --length "${IMG_SIZE_IN_MB}MiB" "${IMG}"

# Format that file as an ext3 filesystem.
# The `-m` argument reduces reserved-blocks-percentage from its default of 5% to 1%.
# TODO: Switch to calling `mkfs.ext3` or `mke2fs -t ext3` since the `mkfs` alias is deprecated:
# https://manpages.ubuntu.com/manpages/jammy/en/man8/mkfs.8.html
mkfs -t ext3 -m 1 "$IMG"

# Adjust the filesystem parameters for improved performance on runtime instances.
# The `-c` and `-i` arguments disable automatic filesystem checks, which are otherwise run based
# on number of times the image is mounted, or how much time has passed since the last check.
tune2fs -c 0 -i 0 "$IMG"