Join-SqlAvailabilityGroup

Joins the local secondary replica to an availability group.

Syntax

Join-SqlAvailabilityGroup
    [-Name] <String>
    [[-Path] <String>]
    [-ClusterType <AvailabilityGroupClusterType>]
    [-Script]
    [-WhatIf]
    [-Confirm]
    [<CommonParameters>]
Join-SqlAvailabilityGroup
    [-Name] <String>
    [-InputObject] <Server>
    [-ClusterType <AvailabilityGroupClusterType>]
    [-Script]
    [-WhatIf]
    [-Confirm]
    [<CommonParameters>]

Description

The Join-SqlAvailabilityGroup cmdlet joins the local secondary replica to an availability group.

Run this cmdlet on an instance of SQL Server that hosts a secondary replica that is not joined to the availability group.

Examples

Example 1: Join a secondary replica to an availability group

PS C:\> Join-SqlAvailabilityGroup -Path "SQLSERVER:\SQL\SecondaryServer\InstanceName" -Name "MainAG"

This command joins a secondary replica to the availability group named 'MainAG'. This server instance must host a secondary replica in this availability group.

Example 2: Create a script that joins a secondary replica to an availability group

PS C:\> Join-SqlAvailabilityGroup -Path "SQLSERVER:\SQL\SecondaryServer\InstanceName" -Name "MainAG" -Script

This command creates a Transact-SQL script that joins a secondary replica to the availability group named 'MainAG'.

Parameters

-ClusterType

The type of cluster backing the AG. Possible values are:

  • Wsfc. The AG will be integrated in Windows Server Failover Cluster. This is how AGs in SQL Server 2016 and below are created. This is the default.
  • None. The AG will be cluster-independent.
  • External. The AG will be managed by a cluster manager that is not a Windows Server Failover Cluster, like Pacemaker on Linux. This is supported in SQL Server 2017 and above. When targeting SQL Server on Linux, you must specify this value or an error will occour.
Type:AvailabilityGroupClusterType
Accepted values:Wsfc, None, External
Position:Named
Default value:Wsfc
Accept pipeline input:False
Accept wildcard characters:False
-Confirm

Prompts you for confirmation before running the cmdlet.

Type:SwitchParameter
Aliases:cf
Position:Named
Default value:False
Accept pipeline input:False
Accept wildcard characters:False
-InputObject

Specifies the server that hosts the instance of SQL Server that hosts the secondary replica that this cmdlet joins to the availability group.

Type:Server
Position:2
Default value:None
Accept pipeline input:True (ByValue)
Accept wildcard characters:False
-Name

Specifies the name of the availability group to which this cmdlet joins a secondary replica.

Type:String
Position:1
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-Path

Specifies the path of the instance of SQL Server that hosts the secondary replica that this cmdlet joins to the availability group. If you do not specify this parameter, this cmdlet uses current working location.

Type:String
Position:2
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-Script

Indicates that this cmdlet returns a Transact-SQL script that performs the task that this cmdlet performs.

Type:SwitchParameter
Position:Named
Default value:None
Accept pipeline input:False
Accept wildcard characters:False
-WhatIf

Shows what would happen if the cmdlet runs. The cmdlet is not run.

Type:SwitchParameter
Aliases:wi
Position:Named
Default value:False
Accept pipeline input:False
Accept wildcard characters:False

Inputs

Microsoft.SqlServer.Management.Smo.Server

You can pass a server instance to this cmdlet.

Notes

The high availability data recovery service must be enabled on the server instance. The availability replica specified by the Path parameter must exist.