AWS CLI Sample - Find latest snapshot

AWS CLI Sample

Find the most recent snapshots of a volume and update a tag on it

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$volumeid = "vol-0000000000000000000" $output = aws ec2 describe-snapshots ` --owner-id 4444444444444 ` --filters "Name=volume-id,Values='$volumeid'" ` --query 'Snapshots[].{ID:SnapShotId,StartTime:StartTime}' $output2 = $output | out-string | convertfrom-json $highDate = "0" $highID = "0" foreach($item in $output2){ if($item.StartTime -gt $highDate){ $highDate = $item.StartTime $highID = $item.ID } } write-host $highID $tag_value = "New Stamp (" + $(get-date).GetDateTimeFormats()[93] + ")" aws ec2 create-tags --resources $highID --tags "Key='Bookmark',Value='$tag_value'"

Lines 2-5 is your standard describe snapshot command. Be sure to include the account number (owner-id) when we're filtering. The query is to limit the data returned since we don't need to know everything about each snapshots.

Lines 9-14 is looping through all the snapshots returned to get the newest one.

Line 16 is just to put a date stamp. GetDateTimeFormats()[93] returns "yyyy-MM-dd hh:mm:ss" date format.