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Add "Acquire::GzipIndexes" to contrib/mkimage/debootstrap

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This results in a dramatic improvement in the size of individual "apt-get update" layers (on a clean wheezy base, from "29.88 MB" down to "8.273 MB").

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
This commit is contained in:
Tianon Gravi 2014-07-16 14:58:02 -06:00
parent dae6af1d1c
commit 2e61e8267e
1 changed files with 15 additions and 0 deletions
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15
contrib/mkimage/debootstrap
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@ -95,6 +95,21 @@ if [ -d "$rootfsDir/etc/apt/apt.conf.d" ]; then
Acquire::Languages "none";
EOF
echo >&2 "+ echo Acquire::GzipIndexes 'true' > '$rootfsDir/etc/apt/apt.conf.d/docker-gzip-indexes'"
cat > "$rootfsDir/etc/apt/apt.conf.d/docker-gzip-indexes" <<-'EOF'
# Since Docker users using "RUN apt-get update && apt-get install -y ..." in
# their Dockerfiles don't go delete the lists files afterwards, we want them to
# be as small as possible on-disk, so we explicitly request "gz" versions and
# tell Apt to keep them gzipped on-disk.
# For comparison, an "apt-get update" layer without this on a pristine
# "debian:wheezy" base image was "29.88 MB", where with this it was only
# "8.273 MB".
Acquire::GzipIndexes "true";
Acquire::CompressionTypes::Order:: "gz";
EOF
fi
if [ -z "$DONT_TOUCH_SOURCES_LIST" ]; then