func PurgeSnapshots(svc *ec2.EC2) error {
dsi := ec2.DescribeSnapshotsInput{}
filter := &ec2.Filter{}
filterName := "tag:" + PurgeAllowKey
filter.Name = &filterName
value := "true"
filter.Values = []*string{&value}
dsi.Filters = append(dsi.Filters, filter)
dso, err := svc.DescribeSnapshots(&dsi)
if err != nil {
return fmt.Errorf("describeSnapshots error, %s", err)
}
purgeCount := 0
for _, snapshot := range dso.Snapshots {
var paVal string
var found bool
if paVal, found = getTagValue(PurgeAfterKey, snapshot.Tags); !found {
log.Printf("snapshot ID %s has tag '%s' but does not have a '%s' tag. Skipping purge...", *snapshot.SnapshotId, PurgeAllowKey, PurgeAfterKey)
continue
}
pa, err := time.Parse(PurgeAfterFormat, paVal)
if err != nil {
return err
}
if pa.Before(time.Now()) {
deli := ec2.DeleteSnapshotInput{}
deli.SnapshotId = snapshot.SnapshotId
_, err := svc.DeleteSnapshot(&deli)
if err != nil {
return fmt.Errorf("error purging Snapshot ID %s, err %s", *snapshot.SnapshotId, err)
}
log.Printf("snapshot ID '%s' purged, size %d GiB\n", *snapshot.SnapshotId, *snapshot.VolumeSize)
purgeCount++
}
}
log.Printf("%d snapshots purged\n", purgeCount)
return nil
}
func deleteOldSnapshots(svc *ec2.EC2, days int) {
output, err := svc.DescribeSnapshots(&ec2.DescribeSnapshotsInput{Filters: []*ec2.Filter{
{
Name: aws.String("description"),
Values: []*string{
aws.String(descriptionPrefix + "-*"),
},
},
}})
if err != nil {
fmt.Printf("%T(%v)", err, err)
os.Exit(-1)
}
time := time.Now().AddDate(0, 0, -1*days)
for _, snapshot := range output.Snapshots {
if snapshot.StartTime.Before(time) {
svc.DeleteSnapshot(&ec2.DeleteSnapshotInput{SnapshotId: snapshot.SnapshotId})
}
}
}