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Update large CFN templates from S3 #347

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Update large CFN templates from S3 #347

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Update large CFN templates from S3
rnhurt Dec 26, 2024
3ba7e95
Merge branch 'mbailey:master' into feature/stack-update-s3-upload
rnhurt Jun 27, 2025
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12 changes: 11 additions & 1 deletion lib/stack-functions
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Original file line number Diff line number Diff line change
Expand Up @@ -258,9 +258,19 @@ stack-update() {
local capabilities_value=$(_bma_stack_capabilities $stack)
[[ -z "${capabilities_value}" ]] || capabilities="--capabilities ${capabilities_value}"

local template_size=$(cat $template | wc -c)
if [ ${template_size} -gt 51200 ]; then
local filename="$(date -u "+%Y-%m-%dT%s")-$(basename $template)"
echo " template too large ... uploading to S3 ..."
aws s3 cp --quiet $template s3://$CFN_BUCKET/$filename
local template_path="--template-url https://${CFN_BUCKET}.s3.amazonaws.com/${filename}"
else
local template_path="--template-body file://$template"
fi

if aws cloudformation update-stack \
--stack-name $stack \
--template-body file://$template \
$template_path \
$parameters \
$capabilities \
--output text; then
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