func (s *consulSnapshot) persistTombstones(sink raft.SnapshotSink,
encoder *codec.Encoder) error {
streamCh := make(chan interface{}, 256)
errorCh := make(chan error)
go func() {
if err := s.state.TombstoneDump(streamCh); err != nil {
errorCh <- err
}
}()
for {
select {
case raw := <-streamCh:
if raw == nil {
return nil
}
sink.Write([]byte{byte(structs.TombstoneRequestType)})
if err := encoder.Encode(raw); err != nil {
return err
}
case err := <-errorCh:
return err
}
}
}
func (s *consulSnapshot) persistACLs(sink raft.SnapshotSink,
encoder *codec.Encoder) error {
acls, err := s.state.ACLList()
if err != nil {
return err
}
for _, s := range acls {
sink.Write([]byte{byte(structs.ACLRequestType)})
if err := encoder.Encode(s); err != nil {
return err
}
}
return nil
}
func (s *consulSnapshot) persistSessions(sink raft.SnapshotSink,
encoder *codec.Encoder) error {
sessions, err := s.state.SessionList()
if err != nil {
return err
}
for _, s := range sessions {
sink.Write([]byte{byte(structs.SessionRequestType)})
if err := encoder.Encode(s); err != nil {
return err
}
}
return nil
}
func (s *consulSnapshot) persistNodes(sink raft.SnapshotSink,
encoder *codec.Encoder) error {
// Get all the nodes
nodes := s.state.Nodes()
// Register each node
var req structs.RegisterRequest
for i := 0; i < len(nodes); i++ {
req = structs.RegisterRequest{
Node: nodes[i].Node,
Address: nodes[i].Address,
}
// Register the node itself
sink.Write([]byte{byte(structs.RegisterRequestType)})
if err := encoder.Encode(&req); err != nil {
return err
}
// Register each service this node has
services := s.state.NodeServices(nodes[i].Node)
for _, srv := range services.Services {
req.Service = srv
sink.Write([]byte{byte(structs.RegisterRequestType)})
if err := encoder.Encode(&req); err != nil {
return err
}
}
// Register each check this node has
req.Service = nil
checks := s.state.NodeChecks(nodes[i].Node)
for _, check := range checks {
req.Check = check
sink.Write([]byte{byte(structs.RegisterRequestType)})
if err := encoder.Encode(&req); err != nil {
return err
}
}
}
return nil
}
func (s *consulSnapshot) Persist(sink raft.SnapshotSink) error {
defer metrics.MeasureSince([]string{"consul", "fsm", "persist"}, time.Now())
// Register the nodes
encoder := codec.NewEncoder(sink, msgpackHandle)
// Write the header
header := snapshotHeader{
LastIndex: s.state.LastIndex(),
}
if err := encoder.Encode(&header); err != nil {
sink.Cancel()
return err
}
if err := s.persistNodes(sink, encoder); err != nil {
sink.Cancel()
return err
}
if err := s.persistSessions(sink, encoder); err != nil {
sink.Cancel()
return err
}
if err := s.persistACLs(sink, encoder); err != nil {
sink.Cancel()
return err
}
if err := s.persistKV(sink, encoder); err != nil {
sink.Cancel()
return err
}
if err := s.persistTombstones(sink, encoder); err != nil {
sink.Cancel()
return err
}
return nil
}