/
storage_volume_snapshots.go
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/
storage_volume_snapshots.go
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//go:build linux && cgo && !agent
package db
import (
"context"
"database/sql"
"fmt"
"net/http"
"strings"
"time"
"github.com/lxc/lxd/lxd/db/query"
"github.com/lxc/lxd/shared"
"github.com/lxc/lxd/shared/api"
)
// CreateStorageVolumeSnapshot creates a new storage volume snapshot attached to a given
// storage pool.
func (c *Cluster) CreateStorageVolumeSnapshot(projectName string, volumeName string, volumeDescription string, volumeType int, poolID int64, volumeConfig map[string]string, creationDate time.Time, expiryDate time.Time) (int64, error) {
var volumeID int64
var snapshotName string
parts := strings.Split(volumeName, shared.SnapshotDelimiter)
volumeName = parts[0]
snapshotName = parts[1]
err := c.Transaction(context.TODO(), func(ctx context.Context, tx *ClusterTx) error {
// Figure out the volume ID of the parent.
parentID, err := tx.storagePoolVolumeGetTypeID(ctx, projectName, volumeName, volumeType, poolID, c.nodeID)
if err != nil {
return fmt.Errorf("Failed finding parent volume record for snapshot: %w", err)
}
_, err = tx.tx.Exec("UPDATE sqlite_sequence SET seq = seq + 1 WHERE name = 'storage_volumes'")
if err != nil {
return fmt.Errorf("Failed incrementing storage volumes sequence: %w", err)
}
row := tx.tx.QueryRowContext(ctx, "SELECT seq FROM sqlite_sequence WHERE name = 'storage_volumes' LIMIT 1")
err = row.Scan(&volumeID)
if err != nil {
return fmt.Errorf("Failed getting storage volumes sequence: %w", err)
}
_, err = tx.tx.Exec("INSERT INTO storage_volumes_snapshots (id, storage_volume_id, name, description, creation_date, expiry_date) VALUES (?, ?, ?, ?, ?, ?)", volumeID, parentID, snapshotName, volumeDescription, creationDate, expiryDate)
if err != nil {
return fmt.Errorf("Failed creating volume snapshot record: %w", err)
}
err = storageVolumeConfigAdd(tx.tx, volumeID, volumeConfig, true)
if err != nil {
return fmt.Errorf("Failed inserting storage volume snapshot record configuration: %w", err)
}
return nil
})
if err != nil {
volumeID = -1
}
return volumeID, err
}
// UpdateStorageVolumeSnapshot updates the storage volume snapshot attached to a given storage pool.
func (c *Cluster) UpdateStorageVolumeSnapshot(projectName string, volumeName string, volumeType int, poolID int64, volumeDescription string, volumeConfig map[string]string, expiryDate time.Time) error {
var err error
if !strings.Contains(volumeName, shared.SnapshotDelimiter) {
return fmt.Errorf("Volume is not a snapshot")
}
err = c.Transaction(context.TODO(), func(ctx context.Context, tx *ClusterTx) error {
volume, err := tx.GetStoragePoolVolume(ctx, poolID, projectName, volumeType, volumeName, true)
if err != nil {
return err
}
err = storageVolumeConfigClear(tx.tx, volume.ID, true)
if err != nil {
return err
}
err = storageVolumeConfigAdd(tx.tx, volume.ID, volumeConfig, true)
if err != nil {
return err
}
err = storageVolumeDescriptionUpdate(tx.tx, volume.ID, volumeDescription, true)
if err != nil {
return err
}
err = storageVolumeSnapshotExpiryDateUpdate(tx.tx, volume.ID, expiryDate)
if err != nil {
return err
}
return nil
})
return err
}
// GetStorageVolumeSnapshotWithID returns the volume snapshot with the given ID.
func (c *Cluster) GetStorageVolumeSnapshotWithID(snapshotID int) (StorageVolumeArgs, error) {
args := StorageVolumeArgs{}
q := `
SELECT
volumes.id,
volumes.name,
volumes.creation_date,
storage_pools.name,
volumes.type,
projects.name
FROM storage_volumes_all AS volumes
JOIN projects ON projects.id=volumes.project_id
JOIN storage_pools ON storage_pools.id=volumes.storage_pool_id
WHERE volumes.id=?
`
arg1 := []any{snapshotID}
outfmt := []any{&args.ID, &args.Name, &args.CreationDate, &args.PoolName, &args.Type, &args.ProjectName}
err := dbQueryRowScan(c, q, arg1, outfmt)
if err != nil {
if err == sql.ErrNoRows {
return args, api.StatusErrorf(http.StatusNotFound, "Storage pool volume snapshot not found")
}
return args, err
}
if !strings.Contains(args.Name, shared.SnapshotDelimiter) {
return args, fmt.Errorf("Volume is not a snapshot")
}
args.TypeName = StoragePoolVolumeTypeNames[args.Type]
return args, nil
}
// GetStorageVolumeSnapshotExpiry gets the expiry date of a storage volume snapshot.
func (c *Cluster) GetStorageVolumeSnapshotExpiry(volumeID int64) (time.Time, error) {
var expiry time.Time
query := "SELECT expiry_date FROM storage_volumes_snapshots WHERE id=?"
inargs := []any{volumeID}
outargs := []any{&expiry}
err := dbQueryRowScan(c, query, inargs, outargs)
if err != nil {
if err == sql.ErrNoRows {
return expiry, api.StatusErrorf(http.StatusNotFound, "Storage pool volume snapshot not found")
}
return expiry, err
}
return expiry, nil
}
// GetExpiredStorageVolumeSnapshots returns a list of expired volume snapshots.
// If memberSpecific is true, then the search is restricted to volumes that belong to this member or belong to
// all members.
func (c *ClusterTx) GetExpiredStorageVolumeSnapshots(ctx context.Context, memberSpecific bool) ([]StorageVolumeArgs, error) {
var q strings.Builder
q.WriteString(`
SELECT
storage_volumes_snapshots.id,
storage_volumes.name,
storage_volumes_snapshots.name,
storage_volumes_snapshots.creation_date,
storage_volumes_snapshots.expiry_date,
storage_pools.name,
projects.name,
IFNULL(storage_volumes.node_id, -1)
FROM storage_volumes_snapshots
JOIN storage_volumes ON storage_volumes_snapshots.storage_volume_id = storage_volumes.id
JOIN storage_pools ON storage_volumes.storage_pool_id = storage_pools.id
JOIN projects ON storage_volumes.project_id = projects.id
WHERE storage_volumes.type = ? AND storage_volumes_snapshots.expiry_date != '0001-01-01T00:00:00Z'
`)
args := []any{StoragePoolVolumeTypeCustom}
if memberSpecific {
q.WriteString("AND (storage_volumes.node_id = ? OR storage_volumes.node_id IS NULL) ")
args = append(args, c.nodeID)
}
var snapshots []StorageVolumeArgs
err := query.Scan(ctx, c.Tx(), q.String(), func(scan func(dest ...any) error) error {
var snap StorageVolumeArgs
var snapName string
var volName string
var expiryTime sql.NullTime
err := scan(&snap.ID, &volName, &snapName, &snap.CreationDate, &expiryTime, &snap.PoolName, &snap.ProjectName, &snap.NodeID)
if err != nil {
return err
}
snap.Name = volName + shared.SnapshotDelimiter + snapName
snap.ExpiryDate = expiryTime.Time // Convert nulls to zero.
// Since zero time causes some issues due to timezones, we check the
// unix timestamp instead of IsZero().
if snap.ExpiryDate.Unix() <= 0 {
return nil // Backup doesn't expire.
}
// Check if snapshot has expired.
if time.Now().Unix()-snap.ExpiryDate.Unix() >= 0 {
snapshots = append(snapshots, snap)
}
return nil
}, args...)
if err != nil {
return nil, err
}
return snapshots, nil
}
// Updates the expiry date of a storage volume snapshot.
func storageVolumeSnapshotExpiryDateUpdate(tx *sql.Tx, volumeID int64, expiryDate time.Time) error {
stmt := "UPDATE storage_volumes_snapshots SET expiry_date=? WHERE id=?"
_, err := tx.Exec(stmt, expiryDate, volumeID)
return err
}