sig_cloud/diskimage-builder
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Merge "Really handle Ubuntu mirror cache skew,"

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Jenkins 2014-07-09 04:00:22 +00:00 committed by Gerrit Code Review
commit 15b25423cd
1 changed files with 10 additions and 3 deletions
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elements/ubuntu/root.d/10-cache-ubuntu-tarball
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@ -24,10 +24,17 @@ else
$TMP_HOOKS_PATH/bin/cache-url $DIB_CLOUD_IMAGES/$DIB_RELEASE/current/$BASE_IMAGE_FILE $CACHED_FILE
pushd $DIB_IMAGE_CACHE
if ! grep "$BASE_IMAGE_FILE" $CACHED_SUMS | sha256sum --check - ; then
# It is likely that an upstream http(s) proxy has given us a new image, but stale sha256sums
# Try again. Harder.
# It is likely that an upstream http(s) proxy has given us a skewed
# result - either a cached SHA file or a cached image. Use cache-busting
# to get (as long as caches are compliant...) fresh files.
# Try the sha256sum first, just in case that is the stale one (avoiding
# downloading the larger image), and then if the sums still fail retry
# the image.
$TMP_HOOKS_PATH/bin/cache-url -f $SHA256SUMS $CACHED_SUMS
grep "$BASE_IMAGE_FILE" $CACHED_SUMS | sha256sum --check -
if ! grep "$BASE_IMAGE_FILE" $CACHED_SUMS | sha256sum --check - ; then
$TMP_HOOKS_PATH/bin/cache-url -f $DIB_CLOUD_IMAGES/$DIB_RELEASE/current/$BASE_IMAGE_FILE $CACHED_FILE
grep "$BASE_IMAGE_FILE" $CACHED_SUMS | sha256sum --check -
fi
fi
popd
fi