lxd: Apply DB triggers on start up if we are the leader.

Signed-off-by: Mark Laing <mark.laing@canonical.com>

lxd/daemon.go

@@ -1258,6 +1258,21 @@ func (d *Daemon) init() error {
 
 	d.gateway.Cluster = d.db.Cluster
 
+	// Check if we are the database leader. If we are, apply database triggers on start up.
+	isLeader, err := isDQLiteLeader(d)
+	if err != nil {
+		return fmt.Errorf("Failed to check raft leader status: %w", err)
+	}
+
+	if isLeader {
+		err := d.db.Cluster.Transaction(d.shutdownCtx, func(ctx context.Context, tx *db.ClusterTx) error {
+			return dbCluster.ApplyTriggers(ctx, tx.Tx())
+		})
+		if err != nil {
+			return fmt.Errorf("Failed to prepare cluster database triggers: %w", err)
+		}
+	}
+
 	// This logic used to belong to patchUpdateFromV10, but has been moved
 	// here because it needs database access.
 	if shared.PathExists(shared.VarPath("lxc")) {