Creates a registration mechanism for schemas.

This also splits out the registration into the table-specific source
files.
This commit is contained in:
James Phillips 2017-11-28 17:03:34 -08:00
parent 36bb30e67a
commit 5a24d37ac0
No known key found for this signature in database
GPG key ID: 77183E682AC5FC11
8 changed files with 441 additions and 414 deletions

View file

@ -44,6 +44,11 @@ func aclsBootstrapTableSchema() *memdb.TableSchema {
} }
} }
func init() {
registerSchema(aclsTableSchema)
registerSchema(aclsBootstrapTableSchema)
}
// ACLs is used to pull all the ACLs from the snapshot. // ACLs is used to pull all the ACLs from the snapshot.
func (s *Snapshot) ACLs() (memdb.ResultIterator, error) { func (s *Snapshot) ACLs() (memdb.ResultIterator, error) {
iter, err := s.tx.Get("acls", "id") iter, err := s.tx.Get("acls", "id")

View file

@ -7,6 +7,28 @@ import (
"github.com/hashicorp/go-memdb" "github.com/hashicorp/go-memdb"
) )
// autopilotConfigTableSchema returns a new table schema used for storing
// the autopilot configuration
func autopilotConfigTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "autopilot-config",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: true,
Unique: true,
Indexer: &memdb.ConditionalIndex{
Conditional: func(obj interface{}) (bool, error) { return true, nil },
},
},
},
}
}
func init() {
registerSchema(autopilotConfigTableSchema)
}
// Autopilot is used to pull the autopilot config from the snapshot. // Autopilot is used to pull the autopilot config from the snapshot.
func (s *Snapshot) Autopilot() (*structs.AutopilotConfig, error) { func (s *Snapshot) Autopilot() (*structs.AutopilotConfig, error) {
c, err := s.tx.First("autopilot-config", "id") c, err := s.tx.First("autopilot-config", "id")

View file

@ -10,6 +10,181 @@ import (
"github.com/hashicorp/go-memdb" "github.com/hashicorp/go-memdb"
) )
// nodesTableSchema returns a new table schema used for storing node
// information.
func nodesTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "nodes",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
},
"uuid": &memdb.IndexSchema{
Name: "uuid",
AllowMissing: true,
Unique: true,
Indexer: &memdb.UUIDFieldIndex{
Field: "ID",
},
},
"meta": &memdb.IndexSchema{
Name: "meta",
AllowMissing: true,
Unique: false,
Indexer: &memdb.StringMapFieldIndex{
Field: "Meta",
Lowercase: false,
},
},
},
}
}
// servicesTableSchema returns a new table schema used to store information
// about services.
func servicesTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "services",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.CompoundIndex{
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.StringFieldIndex{
Field: "ServiceID",
Lowercase: true,
},
},
},
},
"node": &memdb.IndexSchema{
Name: "node",
AllowMissing: false,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
},
"service": &memdb.IndexSchema{
Name: "service",
AllowMissing: true,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "ServiceName",
Lowercase: true,
},
},
},
}
}
// checksTableSchema returns a new table schema used for storing and indexing
// health check information. Health checks have a number of different attributes
// we want to filter by, so this table is a bit more complex.
func checksTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "checks",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.CompoundIndex{
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.StringFieldIndex{
Field: "CheckID",
Lowercase: true,
},
},
},
},
"status": &memdb.IndexSchema{
Name: "status",
AllowMissing: false,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "Status",
Lowercase: false,
},
},
"service": &memdb.IndexSchema{
Name: "service",
AllowMissing: true,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "ServiceName",
Lowercase: true,
},
},
"node": &memdb.IndexSchema{
Name: "node",
AllowMissing: true,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
},
"node_service_check": &memdb.IndexSchema{
Name: "node_service_check",
AllowMissing: true,
Unique: false,
Indexer: &memdb.CompoundIndex{
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.FieldSetIndex{
Field: "ServiceID",
},
},
},
},
"node_service": &memdb.IndexSchema{
Name: "node_service",
AllowMissing: true,
Unique: false,
Indexer: &memdb.CompoundIndex{
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.StringFieldIndex{
Field: "ServiceID",
Lowercase: true,
},
},
},
},
},
}
}
func init() {
registerSchema(nodesTableSchema)
registerSchema(servicesTableSchema)
registerSchema(checksTableSchema)
}
const ( const (
// minUUIDLookupLen is used as a minimum length of a node name required before // minUUIDLookupLen is used as a minimum length of a node name required before
// we test to see if the name is actually a UUID and perform an ID-based node // we test to see if the name is actually a UUID and perform an ID-based node

View file

@ -8,6 +8,49 @@ import (
"github.com/hashicorp/go-memdb" "github.com/hashicorp/go-memdb"
) )
// coordinatesTableSchema returns a new table schema used for storing
// network coordinates.
func coordinatesTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "coordinates",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.CompoundIndex{
// AllowMissing is required since we allow
// Segment to be an empty string.
AllowMissing: true,
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.StringFieldIndex{
Field: "Segment",
Lowercase: true,
},
},
},
},
"node": &memdb.IndexSchema{
Name: "node",
AllowMissing: false,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
},
},
}
}
func init() {
registerSchema(coordinatesTableSchema)
}
// Coordinates is used to pull all the coordinates from the snapshot. // Coordinates is used to pull all the coordinates from the snapshot.
func (s *Snapshot) Coordinates() (memdb.ResultIterator, error) { func (s *Snapshot) Coordinates() (memdb.ResultIterator, error) {
iter, err := s.tx.Get("coordinates", "id") iter, err := s.tx.Get("coordinates", "id")

View file

@ -9,6 +9,57 @@ import (
"github.com/hashicorp/go-memdb" "github.com/hashicorp/go-memdb"
) )
// kvsTableSchema returns a new table schema used for storing key/value data for
// Consul's kv store.
func kvsTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "kvs",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.StringFieldIndex{
Field: "Key",
Lowercase: false,
},
},
"session": &memdb.IndexSchema{
Name: "session",
AllowMissing: true,
Unique: false,
Indexer: &memdb.UUIDFieldIndex{
Field: "Session",
},
},
},
}
}
// tombstonesTableSchema returns a new table schema used for storing tombstones
// during KV delete operations to prevent the index from sliding backwards.
func tombstonesTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "tombstones",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.StringFieldIndex{
Field: "Key",
Lowercase: false,
},
},
},
}
}
func init() {
registerSchema(kvsTableSchema)
registerSchema(tombstonesTableSchema)
}
// KVs is used to pull the full list of KVS entries for use during snapshots. // KVs is used to pull the full list of KVS entries for use during snapshots.
func (s *Snapshot) KVs() (memdb.ResultIterator, error) { func (s *Snapshot) KVs() (memdb.ResultIterator, error) {
iter, err := s.tx.Get("kvs", "id_prefix") iter, err := s.tx.Get("kvs", "id_prefix")

View file

@ -9,6 +9,51 @@ import (
"github.com/hashicorp/go-memdb" "github.com/hashicorp/go-memdb"
) )
// preparedQueriesTableSchema returns a new table schema used for storing
// prepared queries.
func preparedQueriesTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "prepared-queries",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.UUIDFieldIndex{
Field: "ID",
},
},
"name": &memdb.IndexSchema{
Name: "name",
AllowMissing: true,
Unique: true,
Indexer: &memdb.StringFieldIndex{
Field: "Name",
Lowercase: true,
},
},
"template": &memdb.IndexSchema{
Name: "template",
AllowMissing: true,
Unique: true,
Indexer: &PreparedQueryIndex{},
},
"session": &memdb.IndexSchema{
Name: "session",
AllowMissing: true,
Unique: false,
Indexer: &memdb.UUIDFieldIndex{
Field: "Session",
},
},
},
}
}
func init() {
registerSchema(preparedQueriesTableSchema)
}
// validUUID is used to check if a given string looks like a UUID // validUUID is used to check if a given string looks like a UUID
var validUUID = regexp.MustCompile(`(?i)^[\da-f]{8}-[\da-f]{4}-[\da-f]{4}-[\da-f]{4}-[\da-f]{12}$`) var validUUID = regexp.MustCompile(`(?i)^[\da-f]{8}-[\da-f]{4}-[\da-f]{4}-[\da-f]{4}-[\da-f]{12}$`)

View file

@ -10,6 +10,15 @@ import (
// new memdb schema structs for constructing an in-memory db. // new memdb schema structs for constructing an in-memory db.
type schemaFn func() *memdb.TableSchema type schemaFn func() *memdb.TableSchema
// schemas is used to register schemas with the state store.
var schemas []schemaFn
// registerSchema registers a new schema with the state store. This should
// get called at package init() time.
func registerSchema(fn schemaFn) {
schemas = append(schemas, fn)
}
// stateStoreSchema is used to return the combined schema for // stateStoreSchema is used to return the combined schema for
// the state store. // the state store.
func stateStoreSchema() *memdb.DBSchema { func stateStoreSchema() *memdb.DBSchema {
@ -18,23 +27,6 @@ func stateStoreSchema() *memdb.DBSchema {
Tables: make(map[string]*memdb.TableSchema), Tables: make(map[string]*memdb.TableSchema),
} }
// Collect the needed schemas
schemas := []schemaFn{
indexTableSchema,
nodesTableSchema,
servicesTableSchema,
checksTableSchema,
kvsTableSchema,
tombstonesTableSchema,
sessionsTableSchema,
sessionChecksTableSchema,
aclsTableSchema,
aclsBootstrapTableSchema,
coordinatesTableSchema,
preparedQueriesTableSchema,
autopilotConfigTableSchema,
}
// Add the tables to the root schema // Add the tables to the root schema
for _, fn := range schemas { for _, fn := range schemas {
schema := fn() schema := fn()
@ -46,8 +38,8 @@ func stateStoreSchema() *memdb.DBSchema {
return db return db
} }
// indexTableSchema returns a new table schema used for // indexTableSchema returns a new table schema used for tracking various indexes
// tracking various indexes for the Raft log. // for the Raft log.
func indexTableSchema() *memdb.TableSchema { func indexTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{ return &memdb.TableSchema{
Name: "index", Name: "index",
@ -65,399 +57,6 @@ func indexTableSchema() *memdb.TableSchema {
} }
} }
// nodesTableSchema returns a new table schema used for func init() {
// storing node information. registerSchema(indexTableSchema)
func nodesTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "nodes",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
},
"uuid": &memdb.IndexSchema{
Name: "uuid",
AllowMissing: true,
Unique: true,
Indexer: &memdb.UUIDFieldIndex{
Field: "ID",
},
},
"meta": &memdb.IndexSchema{
Name: "meta",
AllowMissing: true,
Unique: false,
Indexer: &memdb.StringMapFieldIndex{
Field: "Meta",
Lowercase: false,
},
},
},
}
}
// servicesTableSchema returns a new TableSchema used to
// store information about services.
func servicesTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "services",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.CompoundIndex{
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.StringFieldIndex{
Field: "ServiceID",
Lowercase: true,
},
},
},
},
"node": &memdb.IndexSchema{
Name: "node",
AllowMissing: false,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
},
"service": &memdb.IndexSchema{
Name: "service",
AllowMissing: true,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "ServiceName",
Lowercase: true,
},
},
},
}
}
// checksTableSchema returns a new table schema used for
// storing and indexing health check information. Health
// checks have a number of different attributes we want to
// filter by, so this table is a bit more complex.
func checksTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "checks",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.CompoundIndex{
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.StringFieldIndex{
Field: "CheckID",
Lowercase: true,
},
},
},
},
"status": &memdb.IndexSchema{
Name: "status",
AllowMissing: false,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "Status",
Lowercase: false,
},
},
"service": &memdb.IndexSchema{
Name: "service",
AllowMissing: true,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "ServiceName",
Lowercase: true,
},
},
"node": &memdb.IndexSchema{
Name: "node",
AllowMissing: true,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
},
"node_service_check": &memdb.IndexSchema{
Name: "node_service_check",
AllowMissing: true,
Unique: false,
Indexer: &memdb.CompoundIndex{
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.FieldSetIndex{
Field: "ServiceID",
},
},
},
},
"node_service": &memdb.IndexSchema{
Name: "node_service",
AllowMissing: true,
Unique: false,
Indexer: &memdb.CompoundIndex{
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.StringFieldIndex{
Field: "ServiceID",
Lowercase: true,
},
},
},
},
},
}
}
// kvsTableSchema returns a new table schema used for storing
// key/value data from consul's kv store.
func kvsTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "kvs",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.StringFieldIndex{
Field: "Key",
Lowercase: false,
},
},
"session": &memdb.IndexSchema{
Name: "session",
AllowMissing: true,
Unique: false,
Indexer: &memdb.UUIDFieldIndex{
Field: "Session",
},
},
},
}
}
// tombstonesTableSchema returns a new table schema used for
// storing tombstones during KV delete operations to prevent
// the index from sliding backwards.
func tombstonesTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "tombstones",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.StringFieldIndex{
Field: "Key",
Lowercase: false,
},
},
},
}
}
// sessionsTableSchema returns a new TableSchema used for
// storing session information.
func sessionsTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "sessions",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.UUIDFieldIndex{
Field: "ID",
},
},
"node": &memdb.IndexSchema{
Name: "node",
AllowMissing: false,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
},
},
}
}
// sessionChecksTableSchema returns a new table schema used
// for storing session checks.
func sessionChecksTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "session_checks",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.CompoundIndex{
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.StringFieldIndex{
Field: "CheckID",
Lowercase: true,
},
&memdb.UUIDFieldIndex{
Field: "Session",
},
},
},
},
"node_check": &memdb.IndexSchema{
Name: "node_check",
AllowMissing: false,
Unique: false,
Indexer: &memdb.CompoundIndex{
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.StringFieldIndex{
Field: "CheckID",
Lowercase: true,
},
},
},
},
"session": &memdb.IndexSchema{
Name: "session",
AllowMissing: false,
Unique: false,
Indexer: &memdb.UUIDFieldIndex{
Field: "Session",
},
},
},
}
}
// coordinatesTableSchema returns a new table schema used for storing
// network coordinates.
func coordinatesTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "coordinates",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.CompoundIndex{
// AllowMissing is required since we allow
// Segment to be an empty string.
AllowMissing: true,
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.StringFieldIndex{
Field: "Segment",
Lowercase: true,
},
},
},
},
"node": &memdb.IndexSchema{
Name: "node",
AllowMissing: false,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
},
},
}
}
// preparedQueriesTableSchema returns a new table schema used for storing
// prepared queries.
func preparedQueriesTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "prepared-queries",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.UUIDFieldIndex{
Field: "ID",
},
},
"name": &memdb.IndexSchema{
Name: "name",
AllowMissing: true,
Unique: true,
Indexer: &memdb.StringFieldIndex{
Field: "Name",
Lowercase: true,
},
},
"template": &memdb.IndexSchema{
Name: "template",
AllowMissing: true,
Unique: true,
Indexer: &PreparedQueryIndex{},
},
"session": &memdb.IndexSchema{
Name: "session",
AllowMissing: true,
Unique: false,
Indexer: &memdb.UUIDFieldIndex{
Field: "Session",
},
},
},
}
}
// autopilotConfigTableSchema returns a new table schema used for storing
// the autopilot configuration
func autopilotConfigTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "autopilot-config",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: true,
Unique: true,
Indexer: &memdb.ConditionalIndex{
Conditional: func(obj interface{}) (bool, error) { return true, nil },
},
},
},
}
} }

View file

@ -9,6 +9,93 @@ import (
"github.com/hashicorp/go-memdb" "github.com/hashicorp/go-memdb"
) )
// sessionsTableSchema returns a new table schema used for storing session
// information.
func sessionsTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "sessions",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.UUIDFieldIndex{
Field: "ID",
},
},
"node": &memdb.IndexSchema{
Name: "node",
AllowMissing: false,
Unique: false,
Indexer: &memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
},
},
}
}
// sessionChecksTableSchema returns a new table schema used for storing session
// checks.
func sessionChecksTableSchema() *memdb.TableSchema {
return &memdb.TableSchema{
Name: "session_checks",
Indexes: map[string]*memdb.IndexSchema{
"id": &memdb.IndexSchema{
Name: "id",
AllowMissing: false,
Unique: true,
Indexer: &memdb.CompoundIndex{
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.StringFieldIndex{
Field: "CheckID",
Lowercase: true,
},
&memdb.UUIDFieldIndex{
Field: "Session",
},
},
},
},
"node_check": &memdb.IndexSchema{
Name: "node_check",
AllowMissing: false,
Unique: false,
Indexer: &memdb.CompoundIndex{
Indexes: []memdb.Indexer{
&memdb.StringFieldIndex{
Field: "Node",
Lowercase: true,
},
&memdb.StringFieldIndex{
Field: "CheckID",
Lowercase: true,
},
},
},
},
"session": &memdb.IndexSchema{
Name: "session",
AllowMissing: false,
Unique: false,
Indexer: &memdb.UUIDFieldIndex{
Field: "Session",
},
},
},
}
}
func init() {
registerSchema(sessionsTableSchema)
registerSchema(sessionChecksTableSchema)
}
// Sessions is used to pull the full list of sessions for use during snapshots. // Sessions is used to pull the full list of sessions for use during snapshots.
func (s *Snapshot) Sessions() (memdb.ResultIterator, error) { func (s *Snapshot) Sessions() (memdb.ResultIterator, error) {
iter, err := s.tx.Get("sessions", "id") iter, err := s.tx.Get("sessions", "id")