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Failover Global Cluster

rds_failover_global_cluster R Documentation

Promotes the specified secondary DB cluster to be the primary DB cluster in the global database cluster to fail over or switch over a global database

Description

Promotes the specified secondary DB cluster to be the primary DB cluster in the global database cluster to fail over or switch over a global database. Switchover operations were previously called "managed planned failovers."

Although this operation can be used either to fail over or to switch over a global database cluster, its intended use is for global database failover. To switch over a global database cluster, we recommend that you use the switchover_global_cluster operation instead.

How you use this operation depends on whether you are failing over or switching over your global database cluster:

  • Failing over - Specify the AllowDataLoss parameter and don't specify the Switchover parameter.

  • Switching over - Specify the Switchover parameter or omit it, but don't specify the AllowDataLoss parameter.

About failing over and switching over

While failing over and switching over a global database cluster both change the primary DB cluster, you use these operations for different reasons:

  • Failing over - Use this operation to respond to an unplanned event, such as a Regional disaster in the primary Region. Failing over can result in a loss of write transaction data that wasn't replicated to the chosen secondary before the failover event occurred. However, the recovery process that promotes a DB instance on the chosen seconday DB cluster to be the primary writer DB instance guarantees that the data is in a transactionally consistent state.

    For more information about failing over an Amazon Aurora global database, see Performing managed failovers for Aurora global databases in the Amazon Aurora User Guide.

  • Switching over - Use this operation on a healthy global database cluster for planned events, such as Regional rotation or to fail back to the original primary DB cluster after a failover operation. With this operation, there is no data loss.

    For more information about switching over an Amazon Aurora global database, see Performing switchovers for Aurora global databases in the Amazon Aurora User Guide.

Usage

rds_failover_global_cluster(GlobalClusterIdentifier,
  TargetDbClusterIdentifier, AllowDataLoss, Switchover)

Arguments

GlobalClusterIdentifier

[required] The identifier of the global database cluster (Aurora global database) this operation should apply to. The identifier is the unique key assigned by the user when the Aurora global database is created. In other words, it's the name of the Aurora global database.

Constraints:

  • Must match the identifier of an existing global database cluster.

TargetDbClusterIdentifier

[required] The identifier of the secondary Aurora DB cluster that you want to promote to the primary for the global database cluster. Use the Amazon Resource Name (ARN) for the identifier so that Aurora can locate the cluster in its Amazon Web Services Region.

AllowDataLoss

Specifies whether to allow data loss for this global database cluster operation. Allowing data loss triggers a global failover operation.

If you don't specify AllowDataLoss, the global database cluster operation defaults to a switchover.

Constraints:

  • Can't be specified together with the Switchover parameter.

Switchover

Specifies whether to switch over this global database cluster.

Constraints:

  • Can't be specified together with the AllowDataLoss parameter.

Value

A list with the following syntax: 

list(
  GlobalCluster = list(
    GlobalClusterIdentifier = "string",
    GlobalClusterResourceId = "string",
    GlobalClusterArn = "string",
    Status = "string",
    Engine = "string",
    EngineVersion = "string",
    EngineLifecycleSupport = "string",
    DatabaseName = "string",
    StorageEncrypted = TRUE|FALSE,
    DeletionProtection = TRUE|FALSE,
    GlobalClusterMembers = list(
      list(
        DBClusterArn = "string",
        Readers = list(
          "string"
        ),
        IsWriter = TRUE|FALSE,
        GlobalWriteForwardingStatus = "enabled"|"disabled"|"enabling"|"disabling"|"unknown",
        SynchronizationStatus = "connected"|"pending-resync"
      )
    ),
    FailoverState = list(
      Status = "pending"|"failing-over"|"cancelling",
      FromDbClusterArn = "string",
      ToDbClusterArn = "string",
      IsDataLossAllowed = TRUE|FALSE
    )
  )
)

Request syntax

svc$failover_global_cluster(
  GlobalClusterIdentifier = "string",
  TargetDbClusterIdentifier = "string",
  AllowDataLoss = TRUE|FALSE,
  Switchover = TRUE|FALSE
)