用于管理 Azure Batch 应用程序版本保留的 PS 脚本

Question

我们有一个 Azure Devops 版本，它使用以下 PowerShell 脚本构建我们的存储库、对其进行打包并将其部署到我们的 Azure Batch 服务：

New-AzureRmBatchApplicationPackage -AccountName "$(BatchAccountName)" -ResourceGroupName "$(ResourceGroupName)" -ApplicationId "$(ApplicationId)" -ApplicationVersion "$(Build.BuildNumber)-$(Release.ReleaseId)" -Format zip -FilePath "$(System.DefaultWorkingDirectory)/_artifact/artifact/bin/theapplication.zip"

Set-AzureRmBatchApplication -AccountName "$(BatchAccountName)" -ResourceGroupName "$(ResourceGroupName)" -ApplicationId "$(ApplicationId)" -DefaultVersion "$(Build.BuildNumber)-$(Release.ReleaseId)"

$Context = Get-AzureRmBatchAccount -AccountName "$(BatchAccountName)" -ResourceGroupName "$(ResourceGroupName)"

Get-AzureBatchComputeNode -PoolId "$(PoolId)" -BatchContext $Context | Restart-AzureBatchComputeNode -BatchContext $Context

问题是，这似乎并没有“清理”旧版本的应用程序包，而且我在 API 文档中没有看到这样做的方法。所以每隔几周我就会收到这样的错误信息：

应用程序包的最大允许数量已经达到 为指定的应用程序添加。

如何更改此脚本以部署应用程序并清理旧版本，以免在部署过程中出现周期性故障？

Answer 1

根据您是否要保留任何历史记录以及您的版本，您应该能够调用 Get-AzBatchApplicationPackage 来列出与应用程序关联的应用程序包 (https://docs.microsoft.com/en-us/powershell/module/az.batch/get-azbatchapplicationpackage?view=azps-1.7.0)。请注意，对于此调用，ApplicationVersion 实际上是可选的。

然后在您不想保留的任何应用程序包上使用 Remove-AzBatchApplicationPackage (https://docs.microsoft.com/en-us/powershell/module/Az.Batch/Remove-AzBatchApplicationPackage?view=azps-1.7.0)，无论是您添加的应用程序包以外的所有应用程序包还是版本上的某些功能都取决于您。

Answer 2

我们使用 Azure CLI（在 PowerShell 中），因此语法与您的略有不同。这是我们实现您所要求的（以及更多）的脚本。关键是在某些调用上使用参数--query，以便能够计算应用程序版本的数量，并获取最旧的版本：

$Environment = "dev"
$ResourceGroup="rg-name-$Environment"
$BatchAccount="batchname$Environment"
$BatchApplicationName="MyApplication"
$BatchApplicationVersion="1.2.3.4"
$SetAsDefaultVersion=$true
$MaxNumOfAppVersions=39

Write-Host "Uploading new version of application to batch service..."
$filename = "folder/file.zip"

$numOfVersions = az batch application package list --resource-group "$ResourceGroup" --name "$BatchAccount" --application-name "$BatchApplicationName" --query "length([].{name:name})"
Write-Host "There are currently $numOfVersions versions of the Application in the Batch Account"
if ($numOfVersions -gt $MaxNumOfAppVersions) {
  # Do not automatically delete old version in the prod environment:
  if (($Environment.ToLower() -eq "prod")) {
    throw "The Batch Application $BatchApplicationName contains too many versions. Delete the oldest, after you have made sure that it is not in use in production."
  }

  $oldestAppVersion = az batch application package list --resource-group "$ResourceGroup" --name "$BatchAccount" --application-name "$BatchApplicationName" --query "sort_by([].{name:name, lastActivationTime:lastActivationTime}, &lastActivationTime)[0].{name:name}" -o tsv
  Write-Host "Deleting the oldest version (by lastActivationTime) of the Application, $oldestAppVersion, to avoid the max limit"
  az batch application package delete --resource-group "$ResourceGroup" --name "$BatchAccount" --application-name "$BatchApplicationName" --version-name $oldestAppVersion --yes
}

Write-Host "Uploading $filename..."
az batch application package create --resource-group "$ResourceGroup" --name "$BatchAccount" --application-name "$BatchApplicationName" --package-file "$filename" --version-name "$BatchApplicationVersion"

if ($SetAsDefaultVersion) {
  Write-Host "Setting this new version $BatchApplicationVersion as the default version..."
  az batch application set --resource-group "$ResourceGroup" --name "$BatchAccount" --application-name "$BatchApplicationName" --default-version "$BatchApplicationVersion"
}

Write-Host "All done!"