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https://github.com/featurebasedb/featurebase.git
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be4f365eaf
Switch Serverless from using BoltDB to Postgres as metadata store. Previously, the controller stored all metadata to BoltDB. This implements SQLDB (currently Postgres flavored) as the backing store for metadata. This will allow us to have multiple instances of the controller running for HA, and to easily inspect and repair the contents of the metadata store. Unfortunately, it was not straightforward to keep the BoltDB implementation working alongside the SQL one, so it will be removed in a later patch. Once that's done, the SQL implementation should allow for a number of simplifications of the schemar and balancer interfaces. Database migration is built directly into the application by embedding the migration files and logic from the `soda` command line tool. When connecting to the RDBMS, the app will always attempt to create the necessary database and apply any outstanding migrations. Integration tests truncate all tables upon start, but *not* at the end, so the state of the database can be inspected after integration tests. Had to refactor some of the controller's background tasks to make sure they get properly shut down on controller exit.
113 lines
2.6 KiB
Go
113 lines
2.6 KiB
Go
package sqldb
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import (
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"github.com/featurebasedb/featurebase/v3/dax"
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"github.com/featurebasedb/featurebase/v3/dax/controller"
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"github.com/featurebasedb/featurebase/v3/dax/models"
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"github.com/featurebasedb/featurebase/v3/logger"
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"github.com/pkg/errors"
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)
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var _ controller.NodeService = (*nodeService)(nil)
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func NewNodeService(log logger.Logger) *nodeService {
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if log == nil {
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log = logger.NopLogger
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}
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return &nodeService{
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log: log,
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}
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}
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type nodeService struct {
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log logger.Logger
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}
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func (n *nodeService) CreateNode(tx dax.Transaction, addr dax.Address, node *dax.Node) error {
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dt, ok := tx.(*DaxTransaction)
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if !ok {
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return dax.NewErrInvalidTransaction("*sqldb.DaxTransaction")
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}
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mnode := &models.Node{Address: node.Address}
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err := dt.C.Create(mnode)
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if err != nil {
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return errors.Wrap(err, "creating node")
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}
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nodeRoles := make(models.NodeRoles, len(node.RoleTypes))
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mnode.NodeRoles = nodeRoles
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for i, rt := range node.RoleTypes {
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mnode.NodeRoles[i] = models.NodeRole{
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NodeID: mnode.ID,
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Role: rt,
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}
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}
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err = dt.C.Create(&(mnode.NodeRoles))
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if err != nil {
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return errors.Wrap(err, "creating node roles")
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}
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return nil
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}
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func (n *nodeService) ReadNode(tx dax.Transaction, addr dax.Address) (*dax.Node, error) {
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dt, ok := tx.(*DaxTransaction)
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if !ok {
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return nil, dax.NewErrInvalidTransaction("*sqldb.DaxTransaction")
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}
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node := &models.Node{}
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err := dt.C.Eager().Where("address = ?", addr).First(node)
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if err != nil {
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return nil, errors.Wrap(err, "getting node")
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}
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roleTypes := make([]dax.RoleType, len(node.NodeRoles))
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for i, nr := range node.NodeRoles {
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roleTypes[i] = nr.Role
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}
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return &dax.Node{
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Address: node.Address,
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RoleTypes: roleTypes,
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}, nil
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}
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func (n *nodeService) DeleteNode(tx dax.Transaction, addr dax.Address) error {
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dt, ok := tx.(*DaxTransaction)
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if !ok {
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return dax.NewErrInvalidTransaction("*sqldb.DaxTransaction")
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}
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node := &models.Node{}
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err := dt.C.Eager().Where("address = ?", addr).First(node)
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if err != nil {
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return errors.Wrap(err, "getting node")
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}
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err = dt.C.Destroy(node)
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return errors.Wrap(err, "destroying node")
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}
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func (n *nodeService) Nodes(tx dax.Transaction) ([]*dax.Node, error) {
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dt, ok := tx.(*DaxTransaction)
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if !ok {
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return nil, dax.NewErrInvalidTransaction("*sqldb.DaxTransaction")
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}
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nodes := []*models.Node{}
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dt.C.Eager().Order("address asc").All(&nodes)
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ret := make([]*dax.Node, len(nodes))
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for i, node := range nodes {
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ret[i] = &dax.Node{
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Address: node.Address,
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RoleTypes: make([]dax.RoleType, len(node.NodeRoles)),
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}
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for j, nr := range node.NodeRoles {
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ret[i].RoleTypes[j] = nr.Role
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}
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}
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return ret, nil
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}
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