// findLatestSnap finds the source snapshot to copy
func (c *config) findLatestSnap() error {
cli := rds.New(session.New(), &aws.Config{Region: aws.String(c.src)})
c.debug(fmt.Sprintf("Searching for snapshots for: %s", c.dbid))
q := rds.DescribeDBSnapshotsInput{}
q.DBInstanceIdentifier = aws.String(c.dbid)
resp, err := cli.DescribeDBSnapshots(&q)
if err != nil {
return err
}
newest := time.Unix(0, 0)
newestId := ""
if len(resp.DBSnapshots) < 1 {
return fmt.Errorf("No snapshots found")
}
c.debug(fmt.Sprintf("Found %d snapshots for: %s", len(resp.DBSnapshots), c.dbid))
for _, r := range resp.DBSnapshots {
if r.SnapshotCreateTime.After(newest) {
newestId = *r.DBSnapshotIdentifier
newest = *r.SnapshotCreateTime
}
}
if len(newestId) < 1 {
return fmt.Errorf("No usable snapshot found")
}
c.arn = fmt.Sprintf("arn:aws:rds:%s:%s:snapshot:%s", c.src, c.awsAcctId, newestId)
c.debug(fmt.Sprintf("Found latest snapshot: %s: %s", newestId, newest.String()))
return nil
}
// checkSnapCopied returns true if the source snapshot has already been copied to the destination region
func (c *config) checkSnapCopied() bool {
cli := rds.New(session.New(), &aws.Config{Region: aws.String(c.dst)})
q := rds.DescribeDBSnapshotsInput{}
q.DBInstanceIdentifier = aws.String(c.dbid)
resp, err := cli.DescribeDBSnapshots(&q)
if err != nil {
return false
}
for _, s := range resp.DBSnapshots {
q := rds.ListTagsForResourceInput{ResourceName: aws.String(fmt.Sprintf("arn:aws:rds:%s:%s:snapshot:%s", c.dst, c.awsAcctId, *s.DBSnapshotIdentifier))}
tags, err := cli.ListTagsForResource(&q)
if err != nil {
continue
}
managedByUs := false
matchedSource := false
for _, t := range tags.TagList {
if *t.Key == "managedby" && *t.Value == "rdsbackup" {
managedByUs = true
} else if *t.Key == "sourcearn" && *t.Value == c.arn {
matchedSource = true
}
}
if managedByUs && matchedSource {
return true
}
}
return false
}
// cleanupSnaps
func (c *config) cleanupSnaps() error {
if c.purge <= 0 {
return nil
}
c.debug(fmt.Sprintf("Cleaning up old snapshots in dest region %s...", c.dst))
cli := rds.New(session.New(), &aws.Config{Region: aws.String(c.dst)})
q := rds.DescribeDBSnapshotsInput{}
q.DBInstanceIdentifier = aws.String(c.dbid)
resp, err := cli.DescribeDBSnapshots(&q)
if err != nil {
return err
}
snaps := map[int64]string{}
keys := int64arr{}
for _, s := range resp.DBSnapshots {
q := rds.ListTagsForResourceInput{ResourceName: aws.String(fmt.Sprintf("arn:aws:rds:%s:%s:snapshot:%s", c.dst, c.awsAcctId, *s.DBSnapshotIdentifier))}
tags, err := cli.ListTagsForResource(&q)
if err != nil {
continue
}
for _, t := range tags.TagList {
if *t.Key == "managedby" && *t.Value == "rdsbackup" {
if s.SnapshotCreateTime.Unix() > 0 {
snaps[s.SnapshotCreateTime.Unix()] = *s.DBSnapshotIdentifier
keys = append(keys, s.SnapshotCreateTime.Unix())
}
}
}
}
if len(snaps) <= c.purge {
c.debug(fmt.Sprintf("Found %d snapshots. Purge flag is %d, so nothing will be purged.", len(snaps), c.purge))
} else {
c.debug(fmt.Sprintf("Found %d snapshots. Purge flag is %d, so the oldest %d snapshots will be purged.", len(snaps), c.purge, len(snaps)-c.purge))
sort.Sort(keys)
for i := 0; i < len(snaps)-c.purge; i++ {
c.debug(fmt.Sprintf("Purging snapshot %s.", snaps[keys[i]]))
q := rds.DeleteDBSnapshotInput{DBSnapshotIdentifier: aws.String(snaps[keys[i]])}
resp, err := cli.DeleteDBSnapshot(&q)
if err != nil {
return err
}
if *resp.DBSnapshot.Status != "deleted" {
c.debug(fmt.Sprintf("Warning: snapshot was not deleted successfully: %s", snaps[keys[i]]))
}
}
c.debug("Done purging shapshots.")
}
return nil
}