aws command line interface - aws ec2 wait - Max attempts exceeded

Question

I am working on shell script, witch does follow:

• creates snapshot of EBS Volume;
• creates AMI image based on this snapshot.

1) I use follow command to create snapshot:
SNAPSHOT_ID=$(aws ec2 create-snapshot "${DRYRUN}" --volume-id "${ROOT_VOLUME_ID}" --description "${SNAPSHOT_DESCRIPTION}" --query 'SnapshotId')

2) I use waiter to wait complete state:
aws ec2 wait snapshot-completed --snapshot-ids "${SNAPSHOT_ID}"

When I test it with EBS Volume 8 GB size everything goes well.
When it is 40 GB, I have an exception:
Waiter SnapshotCompleted failed: Max attempts exceeded

Probably, 40 GB takes more time, then 8 GB one, just need to wait.

AWS Docs (http://docs.aws.amazon.com/cli/latest/reference/ec2/wait/snapshot-completed.html) don't have any timeout or attempts quantity option.

May be some of you have faced the same issue?

Answer 1

you should probably use until in bash, looks a bit cleaner and you don't have to repeat.

echo "waiting for snapshot $snapshot"
until aws ec2 wait snapshot-completed --snapshot-ids $snapshot 2>/dev/null
do
    do printf "\rsnapshot progress: %s" $progress;
    sleep 10
    progress=$(aws ec2 describe-snapshots --snapshot-ids $snapshot --query "Snapshots[*].Progress" --output text)
done