github.com/weaviate/weaviate@v1.24.6/usecases/replica/config.go (about)

     1  //                           _       _
     2  // __      _____  __ ___   ___  __ _| |_ ___
     3  // \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
     4  //  \ V  V /  __/ (_| |\ V /| | (_| | ||  __/
     5  //   \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
     6  //
     7  //  Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
     8  //
     9  //  CONTACT: hello@weaviate.io
    10  //
    11  
    12  package replica
    13  
    14  import (
    15  	"fmt"
    16  
    17  	"github.com/weaviate/weaviate/entities/models"
    18  	"github.com/weaviate/weaviate/entities/replication"
    19  )
    20  
    21  type nodeCounter interface {
    22  	NodeCount() int
    23  }
    24  
    25  func ValidateConfig(class *models.Class, globalCfg replication.GlobalConfig) error {
    26  	if class.ReplicationConfig == nil {
    27  		class.ReplicationConfig = &models.ReplicationConfig{Factor: int64(globalCfg.MinimumFactor)}
    28  		return nil
    29  	}
    30  
    31  	if class.ReplicationConfig.Factor > 0 && class.ReplicationConfig.Factor < int64(globalCfg.MinimumFactor) {
    32  		return fmt.Errorf("invalid replication factor: setup requires a minimum replication factor of %d: got %d",
    33  			globalCfg.MinimumFactor, class.ReplicationConfig.Factor)
    34  	}
    35  
    36  	if class.ReplicationConfig.Factor < 1 {
    37  		class.ReplicationConfig.Factor = int64(globalCfg.MinimumFactor)
    38  	}
    39  
    40  	return nil
    41  }
    42  
    43  func ValidateConfigUpdate(old, updated *models.Class, nodeCounter nodeCounter) error {
    44  	// This is not possible if schema is being updated via by a client.
    45  	// But for a test object that wasn't created by a client, it is.
    46  	if old.ReplicationConfig == nil {
    47  		old.ReplicationConfig = &models.ReplicationConfig{Factor: 1}
    48  	}
    49  
    50  	if updated.ReplicationConfig == nil {
    51  		updated.ReplicationConfig = &models.ReplicationConfig{Factor: 1}
    52  	}
    53  
    54  	if old.ReplicationConfig.Factor != updated.ReplicationConfig.Factor {
    55  		nc := nodeCounter.NodeCount()
    56  		if int(updated.ReplicationConfig.Factor) > nc {
    57  			return fmt.Errorf("cannot scale to %d replicas, cluster has only %d nodes",
    58  				updated.ReplicationConfig.Factor, nc)
    59  		}
    60  	}
    61  
    62  	return nil
    63  }