forked from moby/swarmkit
/
services.go
238 lines (199 loc) · 6.06 KB
/
services.go
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package store
import (
"strings"
"github.com/docker/swarmkit/api"
"github.com/docker/swarmkit/api/naming"
memdb "github.com/hashicorp/go-memdb"
)
const tableService = "service"
func init() {
register(ObjectStoreConfig{
Table: &memdb.TableSchema{
Name: tableService,
Indexes: map[string]*memdb.IndexSchema{
indexID: {
Name: indexID,
Unique: true,
Indexer: api.ServiceIndexerByID{},
},
indexName: {
Name: indexName,
Unique: true,
Indexer: api.ServiceIndexerByName{},
},
indexRuntime: {
Name: indexRuntime,
AllowMissing: true,
Indexer: serviceIndexerByRuntime{},
},
indexNetwork: {
Name: indexNetwork,
AllowMissing: true,
Indexer: serviceIndexerByNetwork{},
},
indexSecret: {
Name: indexSecret,
AllowMissing: true,
Indexer: serviceIndexerBySecret{},
},
indexConfig: {
Name: indexConfig,
AllowMissing: true,
Indexer: serviceIndexerByConfig{},
},
indexCustom: {
Name: indexCustom,
Indexer: api.ServiceCustomIndexer{},
AllowMissing: true,
},
},
},
Save: func(tx ReadTx, snapshot *api.StoreSnapshot) error {
var err error
snapshot.Services, err = FindServices(tx, All)
return err
},
Restore: func(tx Tx, snapshot *api.StoreSnapshot) error {
toStoreObj := make([]api.StoreObject, len(snapshot.Services))
for i, x := range snapshot.Services {
toStoreObj[i] = x
}
return RestoreTable(tx, tableService, toStoreObj)
},
ApplyStoreAction: func(tx Tx, sa api.StoreAction) error {
switch v := sa.Target.(type) {
case *api.StoreAction_Service:
obj := v.Service
switch sa.Action {
case api.StoreActionKindCreate:
return CreateService(tx, obj)
case api.StoreActionKindUpdate:
return UpdateService(tx, obj)
case api.StoreActionKindRemove:
return DeleteService(tx, obj.ID)
}
}
return errUnknownStoreAction
},
})
}
// CreateService adds a new service to the store.
// Returns ErrExist if the ID is already taken.
func CreateService(tx Tx, s *api.Service) error {
// Ensure the name is not already in use.
if tx.lookup(tableService, indexName, strings.ToLower(s.Spec.Annotations.Name)) != nil {
return ErrNameConflict
}
return tx.create(tableService, s)
}
// UpdateService updates an existing service in the store.
// Returns ErrNotExist if the service doesn't exist.
func UpdateService(tx Tx, s *api.Service) error {
// Ensure the name is either not in use or already used by this same Service.
if existing := tx.lookup(tableService, indexName, strings.ToLower(s.Spec.Annotations.Name)); existing != nil {
if existing.GetID() != s.ID {
return ErrNameConflict
}
}
return tx.update(tableService, s)
}
// DeleteService removes a service from the store.
// Returns ErrNotExist if the service doesn't exist.
func DeleteService(tx Tx, id string) error {
return tx.delete(tableService, id)
}
// GetService looks up a service by ID.
// Returns nil if the service doesn't exist.
func GetService(tx ReadTx, id string) *api.Service {
s := tx.get(tableService, id)
if s == nil {
return nil
}
return s.(*api.Service)
}
// FindServices selects a set of services and returns them.
func FindServices(tx ReadTx, by By) ([]*api.Service, error) {
checkType := func(by By) error {
switch by.(type) {
case byName, byNamePrefix, byIDPrefix, byRuntime, byReferencedNetworkID, byReferencedSecretID, byReferencedConfigID, byCustom, byCustomPrefix, byAll:
return nil
default:
return ErrInvalidFindBy
}
}
serviceList := []*api.Service{}
appendResult := func(o api.StoreObject) {
serviceList = append(serviceList, o.(*api.Service))
}
err := tx.find(tableService, by, checkType, appendResult)
return serviceList, err
}
type serviceIndexerByRuntime struct{}
func (si serviceIndexerByRuntime) FromArgs(args ...interface{}) ([]byte, error) {
return fromArgs(args...)
}
func (si serviceIndexerByRuntime) FromObject(obj interface{}) (bool, []byte, error) {
s := obj.(*api.Service)
r, err := naming.Runtime(s.Spec.Task)
if err != nil {
return false, nil, nil
}
return true, []byte(r + "\x00"), nil
}
func (si serviceIndexerByRuntime) PrefixFromArgs(args ...interface{}) ([]byte, error) {
return prefixFromArgs(args...)
}
type serviceIndexerByNetwork struct{}
func (si serviceIndexerByNetwork) FromArgs(args ...interface{}) ([]byte, error) {
return fromArgs(args...)
}
func (si serviceIndexerByNetwork) FromObject(obj interface{}) (bool, [][]byte, error) {
s := obj.(*api.Service)
var networkIDs [][]byte
specNetworks := s.Spec.Task.Networks
if len(specNetworks) == 0 {
specNetworks = s.Spec.Networks
}
for _, na := range specNetworks {
// Add the null character as a terminator
networkIDs = append(networkIDs, []byte(na.Target+"\x00"))
}
return len(networkIDs) != 0, networkIDs, nil
}
type serviceIndexerBySecret struct{}
func (si serviceIndexerBySecret) FromArgs(args ...interface{}) ([]byte, error) {
return fromArgs(args...)
}
func (si serviceIndexerBySecret) FromObject(obj interface{}) (bool, [][]byte, error) {
s := obj.(*api.Service)
container := s.Spec.Task.GetContainer()
if container == nil {
return false, nil, nil
}
var secretIDs [][]byte
for _, secretRef := range container.Secrets {
// Add the null character as a terminator
secretIDs = append(secretIDs, []byte(secretRef.SecretID+"\x00"))
}
return len(secretIDs) != 0, secretIDs, nil
}
type serviceIndexerByConfig struct{}
func (si serviceIndexerByConfig) FromArgs(args ...interface{}) ([]byte, error) {
return fromArgs(args...)
}
func (si serviceIndexerByConfig) FromObject(obj interface{}) (bool, [][]byte, error) {
s, ok := obj.(*api.Service)
if !ok {
panic("unexpected type passed to FromObject")
}
container := s.Spec.Task.GetContainer()
if container == nil {
return false, nil, nil
}
var configIDs [][]byte
for _, configRef := range container.Configs {
// Add the null character as a terminator
configIDs = append(configIDs, []byte(configRef.ConfigID+"\x00"))
}
return len(configIDs) != 0, configIDs, nil
}