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added aws profile variable #30

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added aws profile variable #30

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18 changes: 10 additions & 8 deletions ebs-snapshot.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,8 @@ set -o pipefail

## Variable Declartions ##

AWS_PROFILE="default"

# Get Instance Details
instance_id=$(wget -q -O- http://169.254.169.254/latest/meta-data/instance-id)
region=$(wget -q -O- http://169.254.169.254/latest/meta-data/placement/availability-zone | sed -e 's/\([1-9]\).$/\1/g')
Expand Down Expand Up @@ -73,34 +75,34 @@ snapshot_volumes() {
log "Volume ID is $volume_id"

# Get the attched device name to add to the description so we can easily tell which volume this is.
device_name=$(aws ec2 describe-volumes --region $region --output=text --volume-ids $volume_id --query 'Volumes[0].{Devices:Attachments[0].Device}')
device_name=$(aws ec2 --profile $AWS_PROFILE describe-volumes --region $region --output=text --volume-ids $volume_id --query 'Volumes[0].{Devices:Attachments[0].Device}')

# Take a snapshot of the current volume, and capture the resulting snapshot ID
snapshot_description="$(hostname)-$device_name-backup-$(date +%Y-%m-%d)"

snapshot_id=$(aws ec2 create-snapshot --region $region --output=text --description $snapshot_description --volume-id $volume_id --query SnapshotId)
snapshot_id=$(aws ec2 --profile $AWS_PROFILE create-snapshot --region $region --output=text --description $snapshot_description --volume-id $volume_id --query SnapshotId)
log "New snapshot is $snapshot_id"

# Add a "CreatedBy:AutomatedBackup" tag to the resulting snapshot.
# Why? Because we only want to purge snapshots taken by the script later, and not delete snapshots manually taken.
aws ec2 create-tags --region $region --resource $snapshot_id --tags Key=CreatedBy,Value=AutomatedBackup
aws ec2 --profile $AWS_PROFILE create-tags --region $region --resource $snapshot_id --tags Key=CreatedBy,Value=AutomatedBackup
done
}

# Function: Cleanup all snapshots associated with this instance that are older than $retention_days
cleanup_snapshots() {
for volume_id in $volume_list; do
snapshot_list=$(aws ec2 describe-snapshots --region $region --output=text --filters "Name=volume-id,Values=$volume_id" "Name=tag:CreatedBy,Values=AutomatedBackup" --query Snapshots[].SnapshotId)
snapshot_list=$(aws ec2 --profile $AWS_PROFILE describe-snapshots --region $region --output=text --filters "Name=volume-id,Values=$volume_id" "Name=tag:CreatedBy,Values=AutomatedBackup" --query Snapshots[].SnapshotId)
for snapshot in $snapshot_list; do
log "Checking $snapshot..."
# Check age of snapshot
snapshot_date=$(aws ec2 describe-snapshots --region $region --output=text --snapshot-ids $snapshot --query Snapshots[].StartTime | awk -F "T" '{printf "%s\n", $1}')
snapshot_date=$(aws ec2 --profile $AWS_PROFILE describe-snapshots --region $region --output=text --snapshot-ids $snapshot --query Snapshots[].StartTime | awk -F "T" '{printf "%s\n", $1}')
snapshot_date_in_seconds=$(date "--date=$snapshot_date" +%s)
snapshot_description=$(aws ec2 describe-snapshots --snapshot-id $snapshot --region $region --query Snapshots[].Description)
snapshot_description=$(aws ec2 --profile $AWS_PROFILE describe-snapshots --snapshot-id $snapshot --region $region --query Snapshots[].Description)

if (( $snapshot_date_in_seconds <= $retention_date_in_seconds )); then
log "DELETING snapshot $snapshot. Description: $snapshot_description ..."
aws ec2 delete-snapshot --region $region --snapshot-id $snapshot
aws ec2 --profile $AWS_PROFILE delete-snapshot --region $region --snapshot-id $snapshot
else
log "Not deleting snapshot $snapshot. Description: $snapshot_description ..."
fi
Expand All @@ -115,7 +117,7 @@ log_setup
prerequisite_check

# Grab all volume IDs attached to this instance
volume_list=$(aws ec2 describe-volumes --region $region --filters Name=attachment.instance-id,Values=$instance_id --query Volumes[].VolumeId --output text)
volume_list=$(aws ec2 --profile $AWS_PROFILE describe-volumes --region $region --filters Name=attachment.instance-id,Values=$instance_id --query Volumes[].VolumeId --output text)

snapshot_volumes
cleanup_snapshots