使用 PowerShell 在 Azure SQL 数据库中的多个数据库之间同步数据

12/03/2021

适用于：Azure SQL 数据库

此 Azure PowerShell 示例将 SQL 数据同步配置为在 Azure SQL 数据库中的多个数据库之间同步数据。

如果没有 Azure 试用版订阅，请在开始前创建一个试用版订阅。

注意

本文使用 Azure Az PowerShell 模块，这是与 Azure 交互时推荐使用的 PowerShell 模块。若要开始使用 Az PowerShell 模块，请参阅安装 Azure PowerShell。若要了解如何迁移到 Az PowerShell 模块，请参阅将 Azure PowerShell 从 AzureRM 迁移到 Az。

本教程需要 Az PowerShell 1.4.0 或更高版本。如果需要进行升级，请参阅 Install Azure PowerShell module（安装 Azure PowerShell 模块）。此外，还需要运行 Connect-AzAccount -EnvironmentName AzureChinaCloud 以创建与 Azure 的连接。

有关 SQL 数据同步的概述，请参阅使用 Azure 中的 SQL 数据同步跨多个云和本地数据库同步数据。

重要

目前，SQL 数据同步不支持 Azure SQL 托管实例。

先决条件

使用 AdventureWorksLT 示例数据库在 Azure SQL 数据库中创建数据库作为中心数据库。
在同步数据库所在的相同区域中创建 Azure SQL 数据库中的数据库。
在运行示例前更新参数占位符。

示例

using namespace Microsoft.Azure.Commands.Sql.DataSync.Model
using namespace System.Collections.Generic

# hub database info
$subscriptionId = "<subscriptionId>"
$resourceGroupName = "<resourceGroupName>"
$serverName = "<serverName>"
$databaseName = "<databaseName>"

# sync database info
$syncDatabaseResourceGroupName = "<syncResourceGroupName>"
$syncDatabaseServerName = "<syncServerName>"
$syncDatabaseName = "<syncDatabaseName>"

# sync group info
$syncGroupName = "<syncGroupName>"
$conflictResolutionPolicy = "HubWin" # can be HubWin or MemberWin
$intervalInSeconds = 300 # sync interval in seconds (must be no less than 300)

# member database info
$syncMemberName = "<syncMemberName>"
$memberServerName = "<memberServerName>"
$memberDatabaseName = "<memberDatabaseName>"
$memberDatabaseType = "SqlServerDatabase" # can be AzureSqlDatabase or SqlServerDatabase
$syncDirection = "Bidirectional" # can be Bidirectional, Onewaymembertohub, Onewayhubtomember

# sync agent info
$syncAgentName = "<agentName>"
$syncAgentResourceGroupName = "<syncAgentResourceGroupName>"
$syncAgentServerName = "<syncAgentServerName>"

$syncMemberResourceId = "/subscriptions/$subscriptionId/resourceGroups/$resourceGroupName/providers/Microsoft.Sql/servers/$serverName/databases/$syncMemberDBName"

# temp file to save the sync schema
$tempFile = $env:TEMP+"\syncSchema.json"

# list of included columns and tables in quoted name
$includedColumnsAndTables =  "[SalesLT].[Address].[AddressID]",
                             "[SalesLT].[Address].[AddressLine2]",
                             "[SalesLT].[Address].[rowguid]",
                             "[SalesLT].[Address].[PostalCode]",
                             "[SalesLT].[ProductDescription]"
$metadataList = [System.Collections.ArrayList]::new($includedColumnsAndTables)

Connect-AzAccount -EnvironmentName AzureChinaCloud
Select-AzSubscription -SubscriptionId $subscriptionId

# use if it's safe to show password in script, otherwise use PromptForCredential
# $user = "username"
# $password = ConvertTo-SecureString -String "password" -AsPlainText -Force
# $credential = New-Object -TypeName "System.Management.Automation.PSCredential" -ArgumentList $user, $password

$credential = $Host.ui.PromptForCredential("Need credential",
              "Please enter your user name and password for server "+$serverName+".database.chinacloudapi.cn",
              "",
              "")

# create a new sync group (if you use private link, make sure to manually approve it)
Write-Host "Creating Sync Group "$syncGroupName"..."
New-AzSqlSyncGroup -ResourceGroupName $resourceGroupName -ServerName $serverName -DatabaseName $databaseName -Name $syncGroupName `
    -SyncDatabaseName $syncDatabaseName -SyncDatabaseServerName $syncDatabaseServerName -SyncDatabaseResourceGroupName $syncDatabaseResourceGroupName `
    -ConflictResolutionPolicy $conflictResolutionPolicy -DatabaseCredential $credential -UsePrivateLinkConnection | Format-list

# use if it's safe to show password in script, otherwise use PromptForCredential
# $user = "username"
# $password = ConvertTo-SecureString -String "password" -AsPlainText -Force
# $credential = New-Object -TypeName "System.Management.Automation.PSCredential" -ArgumentList $user, $password

$credential = $Host.ui.PromptForCredential("Need credential",
              "Please enter your user name and password for server "+$serverName+".database.chinacloudapi.cn",
              "",
              "")

# add a new sync member (if you use private link, make sure to manually approve it)
Write-Host "Adding member"$syncMemberName" to the sync group..."
New-AzSqlSyncMember -ResourceGroupName $resourceGroupName -ServerName $serverName -DatabaseName $databaseName `
    -SyncGroupName $syncGroupName -Name $syncMemberName -MemberDatabaseType $memberDatabaseType -SyncAgentResourceGroupName $syncAgentResourceGroupName `
    -SyncAgentServerName $syncAgentServerName -SyncAgentName $syncAgentName  -SyncDirection $syncDirection -SqlServerDatabaseID  $syncAgentInfo.DatabaseId `
    -SyncMemberAzureDatabaseResourceId $syncMemberResourceId -UsePrivateLinkConnection | Format-list

# update existing sync member to use private link connection 
Update-AzSqlSyncMember `
    -ResourceGroupName $resourceGroupName -ServerName $serverName -DatabaseName $databaseName -SyncGroupName $syncGroupName -Name $syncMemberName `
    -MemberDatabaseCredential $memberDatabaseCredential -SyncMemberAzureDatabaseResourceId $syncMemberResourceId -UsePrivateLinkConnection $true
    
# update existing sync group and remove private link connection
Update-AzSqlSyncGroup `
    -ResourceGroupName $resourceGroupName -ServerName $serverName -DatabaseName $databaseName -Name $syncGroupName -UsePrivateLinkConnection $false

# run the following Get-AzSqlSyncGroup/ Get-AzSqlSyncMember commands to confirm that a private link has been setup for Data Sync, if you decide to use private link. 
# Get-AzSqlSyncMember returns information about one or more Azure SQL Database Sync Members. Specify the name of a sync member to see information for only that sync member.
Get-AzSqlSyncMember `
    -ResourceGroupName $resourceGroupName -ServerName $serverName -DatabaseName $databaseName -SyncGroupName $syncGroupName -Name $syncMemberName ` | Format-List
# Get-AzSqlSyncGroup returns information about one or more Azure SQL Database Sync Groups. Specify the name of a sync group to see information for only that sync group.
Get-AzSqlSyncGroup `
    -ResourceGroupName $resourceGroupName -ServerName $serverName -DatabaseName $databaseName ` | Format-List
    
# approve private endpoint connection, if you decide to use private link
Approve-AzPrivateEndpointConnection `
    -Name myPrivateEndpointConnection -ResourceGroupName myResourceGroup -ServiceName myPrivateLinkService

# refresh database schema from hub database, specify the -SyncMemberName parameter if you want to refresh schema from the member database
Write-Host "Refreshing database schema from hub database..."
$startTime = Get-Date
Update-AzSqlSyncSchema -ResourceGroupName $resourceGroupName -ServerName $serverName -DatabaseName $databaseName -SyncGroupName $syncGroupName

# waiting for successful refresh
$startTime = $startTime.ToUniversalTime()
$timer=0
$timeout=90

# check the log and see if refresh has gone through
Write-Host "Check for successful refresh..."
$isSucceeded = $false
while ($isSucceeded -eq $false) {
    Start-Sleep -s 10
    $timer=$timer+10
    $details = Get-AzSqlSyncSchema -SyncGroupName $syncGroupName -ServerName $serverName -DatabaseName $databaseName -ResourceGroupName $resourceGroupName
    if ($details.LastUpdateTime -gt $startTime) {
        Write-Host "Refresh was successful"
        $isSucceeded = $true
    }
    if ($timer -eq $timeout) {
        Write-Host "Refresh timed out"
        break;
    }
}

# get the database schema
Write-Host "Adding tables and columns to the sync schema..."
$databaseSchema = Get-AzSqlSyncSchema -ResourceGroupName $ResourceGroupName -ServerName $ServerName `
    -DatabaseName $DatabaseName -SyncGroupName $SyncGroupName `

$databaseSchema | ConvertTo-Json -depth 5 -Compress | Out-File "C:\Users\OnPremiseServer\AppData\Local\Temp\syncSchema.json"

$newSchema = [AzureSqlSyncGroupSchemaModel]::new()
$newSchema.Tables = [List[AzureSqlSyncGroupSchemaTableModel]]::new();

# add columns and tables to the sync schema
foreach ($tableSchema in $databaseSchema.Tables) {
    $newTableSchema = [AzureSqlSyncGroupSchemaTableModel]::new()
    $newTableSchema.QuotedName = $tableSchema.QuotedName
    $newTableSchema.Columns = [List[AzureSqlSyncGroupSchemaColumnModel]]::new();
    $addAllColumns = $false
    if ($MetadataList.Contains($tableSchema.QuotedName)) {
        if ($tableSchema.HasError) {
            $fullTableName = $tableSchema.QuotedName
            Write-Host "Can't add table $fullTableName to the sync schema" -foregroundcolor "Red"
            Write-Host $tableSchema.ErrorId -foregroundcolor "Red"
            continue;
        }
        else {
            $addAllColumns = $true
        }
    }
    foreach($columnSchema in $tableSchema.Columns) {
        $fullColumnName = $tableSchema.QuotedName + "." + $columnSchema.QuotedName
        if ($addAllColumns -or $MetadataList.Contains($fullColumnName)) {
            if ((-not $addAllColumns) -and $tableSchema.HasError) {
                Write-Host "Can't add column $fullColumnName to the sync schema" -foregroundcolor "Red"
                Write-Host $tableSchema.ErrorId -foregroundcolor "Red"
            }
            elseif ((-not $addAllColumns) -and $columnSchema.HasError) {
                Write-Host "Can't add column $fullColumnName to the sync schema" -foregroundcolor "Red"
                Write-Host $columnSchema.ErrorId -foregroundcolor "Red"
            }
            else {
                Write-Host "Adding"$fullColumnName" to the sync schema"
                $newColumnSchema = [AzureSqlSyncGroupSchemaColumnModel]::new()
                $newColumnSchema.QuotedName = $columnSchema.QuotedName
                $newColumnSchema.DataSize = $columnSchema.DataSize
                $newColumnSchema.DataType = $columnSchema.DataType
                $newTableSchema.Columns.Add($newColumnSchema)
            }
        }
    }
    if ($newTableSchema.Columns.Count -gt 0) {
        $newSchema.Tables.Add($newTableSchema)
    }
}

# convert sync schema to JSON format
$schemaString = $newSchema | ConvertTo-Json -depth 5 -Compress

# work around a PowerShell bug
$schemaString = $schemaString.Replace('"Tables"', '"tables"').Replace('"Columns"', '"columns"').Replace('"QuotedName"', '"quotedName"').Replace('"MasterSyncMemberName"','"masterSyncMemberName"')

# save the sync schema to a temp file
$schemaString | Out-File $tempFile

# update sync schema
Write-Host "Updating the sync schema..."
Update-AzSqlSyncGroup -ResourceGroupName $resourceGroupName -ServerName $serverName `
    -DatabaseName $databaseName -Name $syncGroupName -Schema $tempFile

$syncLogStartTime = Get-Date

# trigger sync manually
Write-Host "Trigger sync manually..."
Start-AzSqlSyncGroupSync -ResourceGroupName $resourceGroupName -ServerName $serverName -DatabaseName $databaseName -SyncGroupName $syncGroupName

# check the sync log and wait until the first sync succeeded
Write-Host "Check the sync log..."
$isSucceeded = $false
for ($i = 0; ($i -lt 300) -and (-not $isSucceeded); $i = $i + 10) {
    Start-Sleep -s 10
    $syncLogEndTime = Get-Date
    $syncLogList = Get-AzSqlSyncGroupLog -ResourceGroupName $resourceGroupName -ServerName $serverName -DatabaseName $databaseName `
        -SyncGroupName $syncGroupName -StartTime $syncLogStartTime.ToUniversalTime() -EndTime $syncLogEndTime.ToUniversalTime()

    if ($synclogList.Length -gt 0) {
        foreach ($syncLog in $syncLogList) {
            if ($syncLog.Details.Contains("Sync completed successfully")) {
                Write-Host $syncLog.TimeStamp : $syncLog.Details
                $isSucceeded = $true
            }
        }
    }
}

if ($isSucceeded) {
    # enable scheduled sync
    Write-Host "Enable the scheduled sync with 300 seconds interval..."
    Update-AzSqlSyncGroup  -ResourceGroupName $resourceGroupName -ServerName $serverName -DatabaseName $databaseName `
        -Name $syncGroupName -IntervalInSeconds $intervalInSeconds
}
else {
    # output all log if sync doesn't succeed in 300 seconds
    $syncLogEndTime = Get-Date
    $syncLogList = Get-AzSqlSyncGroupLog  -ResourceGroupName $resourceGroupName -ServerName $serverName -DatabaseName $databaseName `
        -SyncGroupName $syncGroupName -StartTime $syncLogStartTime.ToUniversalTime() -EndTime $syncLogEndTime.ToUniversalTime()

    if ($synclogList.Length -gt 0) {
        foreach ($syncLog in $syncLogList) {
            Write-Host $syncLog.TimeStamp : $syncLog.Details
        }
    }
}

清理部署

运行示例脚本后，可以运行以下命令，删除资源组以及与其关联的所有资源。

Remove-AzResourceGroup -ResourceGroupName $ResourceGroupName
Remove-AzResourceGroup -ResourceGroupName $SyncDatabaseResourceGroupName

脚本说明

此脚本使用以下命令。表中的每条命令链接到特定于命令的文档。

命令	注释
New-AzSqlSyncAgent	创建新的同步代理。
New-AzSqlSyncAgentKey	生成与同步代理相关联的代理密钥。
Get-AzSqlSyncAgentLinkedDatabase	获取有关同步代理的所有信息。
New-AzSqlSyncMember	向同步组中添加新成员。
Update-AzSqlSyncSchema	刷新数据库架构信息。
Get-AzSqlSyncSchema	获取数据库架构信息。
Update-AzSqlSyncGroup	更新同步组。
Start-AzSqlSyncGroupSync	触发同步。
Get-AzSqlSyncGroupLog	检查同步日志。

后续步骤

有关 Azure PowerShell 的详细信息，请参阅 Azure PowerShell 文档。

可以在 Azure SQL 数据库 PowerShell 脚本中找到更多 SQL 数据库 PowerShell 脚本示例。

有关 SQL 数据同步的详细信息，请参阅：

概述 - 使用 Azure 中的 SQL 数据同步跨多个云和本地数据库同步数据
设置数据同步
- 使用 Azure 门户 - 教程：设置 SQL 数据同步，以在 Azure SQL 数据库和 SQL Server 之间同步数据
- 使用 PowerShell - 使用 PowerShell 在 Azure SQL 数据库中的数据库和 SQL Server 之间同步数据
Data Sync Agent - Azure 中 SQL 数据同步的 Data Sync Agent
最佳做法 - Azure 中 SQL 数据同步的最佳做法
监视 - 使用 Azure Monitor 日志监视 SQL 数据同步
故障排除 - 排查 Azure 中的 SQL 数据同步问题
更新同步架构
- 使用 Transact-SQL - 在 Azure 中的 SQL 数据同步中自动复制架构更改
- 使用 PowerShell - 使用 PowerShell 更新现有同步组中的同步架构

有关 SQL 数据库的详细信息，请参阅：

使用 PowerShell 在 Azure SQL 数据库中的多个数据库之间同步数据

请为你的体验评分

先决条件

示例

清理部署

脚本说明

后续步骤