fix: Remove bucket and mapping auto-creation from /write API

CHANGELOG.md

@@ -11,6 +11,7 @@
 1. [19952](https://github.com/influxdata/influxdb/pull/19952): Use `db`/`rp` naming convention when migrating DBs to buckets
 1. [19925](https://github.com/influxdata/influxdb/pull/19937): Create CLI configs in `influxd upgrade`
 1. [19945](https://github.com/influxdata/influxdb/pull/19945): Allow write-only V1 tokens to find DBRPs
+1. [19960](https://github.com/influxdata/influxdb/pull/19960): Remove bucket and mapping auto-creation from v1 /write API
 
 ## v2.0.0-rc.4 [2020-11-05]
 

http/legacy/write_handler.go

@@ -2,11 +2,8 @@ package legacy
 
 import (
 	"context"
-	"errors"
-	"fmt"
 	"io"
 	"net/http"
-	"time"
 
 	"github.com/influxdata/httprouter"
 	"github.com/influxdata/influxdb/v2"
@@ -21,11 +18,7 @@ import (
 var _ http.Handler = (*WriteHandler)(nil)
 
 const (
-	opPointsWriter = "http/v1PointsWriter"
 	opWriteHandler = "http/v1WriteHandler"
-
-	autoCreatedBucketDescription     = "Auto-created from v1 db/rp mapping."
-	autoCreatedBucketRetentionPeriod = 3 * 24 * time.Hour
 )
 
 // PointsWriterBackend contains all the services needed to run a PointsWriterHandler.
@@ -62,7 +55,6 @@ type WriteHandler struct {
 	router            *httprouter.Router
 	logger            *zap.Logger
 	maxBatchSizeBytes int64
-	//parserOptions     []models.ParserOption
 }
 
 // NewWriterHandler returns a new instance of PointsWriterHandler.
@@ -98,13 +90,6 @@ func WithMaxBatchSizeBytes(n int64) WriteHandlerOption {
 	}
 }
 
-//// WithParserOptions configures options for points parsing
-//func WithParserOptions(opts ...models.ParserOption) WriteHandlerOption {
-//	return func(w *WriteHandler) {
-//		w.parserOptions = opts
-//	}
-//}
-
 // ServeHTTP implements http.Handler
 func (h *WriteHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	h.router.ServeHTTP(w, r)
@@ -136,7 +121,7 @@ func (h *WriteHandler) handleWrite(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	bucket, err := h.findOrCreateMappedBucket(ctx, auth.OrgID, req.Database, req.RetentionPolicy)
+	bucket, err := h.findBucket(ctx, auth.OrgID, req.Database, req.RetentionPolicy)
 	if err != nil {
 		h.HandleHTTPError(ctx, err, sw)
 		return
@@ -162,25 +147,15 @@ func (h *WriteHandler) handleWrite(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusNoContent)
 }
 
-// findOrCreateMappedBucket finds a DBRPMappingV2 for the database and
-// retention policy combination. If the mapping doesn't exist, it will be
-// created and bound to either an existing Bucket or a new one created for this
-// purpose.
-func (h *WriteHandler) findOrCreateMappedBucket(ctx context.Context, orgID influxdb.ID, db, rp string) (*influxdb.Bucket, error) {
+// findBucket finds a bucket for the specified database and
+// retention policy combination.
+func (h *WriteHandler) findBucket(ctx context.Context, orgID influxdb.ID, db, rp string) (*influxdb.Bucket, error) {
 	mapping, err := h.findMapping(ctx, orgID, db, rp)
 	if err == nil {
 		return h.BucketService.FindBucketByID(ctx, mapping.BucketID)
 	}
 
-	if !isErrNotFound(err) {
-		return nil, err
-	}
-
-	bucket, err := h.mapToBucket(ctx, orgID, db, rp)
-	if err != nil {
-		return nil, err
-	}
-	return bucket, nil
+	return nil, err
 }
 
 // findMapping finds a DBRPMappingV2 for the database and retention policy
@@ -207,62 +182,6 @@ func (h *WriteHandler) findMapping(ctx context.Context, orgID influxdb.ID, db, r
 	return mappings[0], nil
 }
 
-// createMapping creates a DBRPMappingV2 for the database and retention policy
-// combination.
-func (h *WriteHandler) createMapping(ctx context.Context, orgID, bucketID influxdb.ID, db, rp string) error {
-	return h.DBRPMappingService.Create(ctx, &influxdb.DBRPMappingV2{
-		OrganizationID:  orgID,
-		BucketID:        bucketID,
-		Database:        db,
-		RetentionPolicy: rp,
-	})
-}
-
-// mapToBucket creates a new DBRPMappingV2 to either an existing Bucket (if it
-// can find it) or a new one it creates for this purpose.
-func (h *WriteHandler) mapToBucket(ctx context.Context, orgID influxdb.ID, db, rp string) (*influxdb.Bucket, error) {
-	if rp == "" {
-		rp = "autogen"
-	}
-
-	name := fmt.Sprintf("%s/%s", db, rp)
-	bucket, err := h.BucketService.FindBucket(ctx, influxdb.BucketFilter{
-		OrganizationID: &orgID,
-		Name:           &name,
-	})
-	if err == nil {
-		if err := h.createMapping(ctx, orgID, bucket.ID, db, rp); err != nil {
-			return nil, err
-		}
-		return bucket, nil
-	}
-	if !isErrNotFound(err) {
-		return nil, err
-	}
-
-	now := time.Now().UTC()
-	bucket = &influxdb.Bucket{
-		Type:                influxdb.BucketTypeUser,
-		Name:                name,
-		Description:         autoCreatedBucketDescription,
-		OrgID:               orgID,
-		RetentionPolicyName: rp,
-		RetentionPeriod:     autoCreatedBucketRetentionPeriod,
-		CRUDLog: influxdb.CRUDLog{
-			CreatedAt: now,
-			UpdatedAt: now,
-		},
-	}
-	err = h.BucketService.CreateBucket(ctx, bucket)
-	if err != nil {
-		return nil, err
-	}
-	if err := h.createMapping(ctx, orgID, bucket.ID, db, rp); err != nil {
-		return nil, err
-	}
-	return bucket, nil
-}
-
 // writeRequest is a transport-agnostic write request. It holds all inputs for
 // processing a v1 write request.
 type writeRequest struct {
@@ -275,7 +194,7 @@ type writeRequest struct {
 
 // decodeWriteRequest extracts write request information from an inbound
 // http.Request and returns a writeRequest.
-func decodeWriteRequest(ctx context.Context, r *http.Request, maxBatchSizeBytes int64) (*writeRequest, error) {
+func decodeWriteRequest(_ context.Context, r *http.Request, maxBatchSizeBytes int64) (*writeRequest, error) {
 	qp := r.URL.Query()
 	precision := qp.Get("precision")
 	if precision == "" {
@@ -303,8 +222,3 @@ func decodeWriteRequest(ctx context.Context, r *http.Request, maxBatchSizeBytes
 		Body:             body,
 	}, nil
 }
-
-func isErrNotFound(err error) bool {
-	var idErr *influxdb.Error
-	return errors.As(err, &idErr) && idErr.Code == influxdb.ENotFound
-}