Make multiple attempts to download image
Downloading an image can fail due to network issues, so let's
retry 5 times before giving up. We have seen issues in CI due
to network issues as described below and in the Related-Bug:-
Often times fetching Fedora image in FIPS jobs fails due to
"GnuTLS: One of the involved algorithms has insufficient security level."
This occurs when request to pull image is redirected to a mirror that's
incompatible with FIPS enabled system.
Making multiple attempts to download images could provide better chance of
pulling images from different mirrors and avoid failure of the job.
This will also save a few rechecks.
Related-Bug: #2045725
Change-Id: I7163aea4d121cb27620e4f2a083a543abfc286bf
diff --git a/functions b/functions
index 7ada0fe..01e1d25 100644
--- a/functions
+++ b/functions
@@ -133,17 +133,28 @@
local image image_fname image_name
+ local max_attempts=5
+
# Create a directory for the downloaded image tarballs.
mkdir -p $FILES/images
image_fname=`basename "$image_url"`
if [[ $image_url != file* ]]; then
# Downloads the image (uec ami+akistyle), then extracts it.
if [[ ! -f $FILES/$image_fname || "$(stat -c "%s" $FILES/$image_fname)" = "0" ]]; then
- wget --progress=dot:giga -c $image_url -O $FILES/$image_fname
- if [[ $? -ne 0 ]]; then
- echo "Not found: $image_url"
- return
- fi
+ for attempt in `seq $max_attempts`; do
+ local rc=0
+ wget --progress=dot:giga -c $image_url -O $FILES/$image_fname || rc=$?
+ if [[ $rc -ne 0 ]]; then
+ if [[ "$attempt" -eq "$max_attempts" ]]; then
+ echo "Not found: $image_url"
+ return
+ fi
+ echo "Download failed, retrying in $attempt second, attempt: $attempt"
+ sleep $attempt
+ else
+ break
+ fi
+ done
fi
image="$FILES/${image_fname}"
else