Azure Web App Site Extension - Failed to install web app extension [...]. {1}

Azure Web App Service를 위한 Site Extension을 만들어,

Azure Web App 확장 예제 - Simple WebSite Extension
; https://www.sysnet.pe.kr/2/0/11505

nuget에 배포한 후, 테스트를 위해 Extension을 설치/제거를 반복하다 보면 어느 순간 다음의 오류 메시지와 함께 설치가 안 될 때가 있습니다.

Installing web app extension
Failed to install web app extension FileCounterSiteExtension. {1}

해당 Web App을 "Restart"해도 저 현상이 계속되는데요, 그런 경우 Kudu Console을 이용해 "D:\home\site\siteextensions\[...extension_name...]" 경로에 있는 json 파일을 보면,

D:\home\site\siteextensions\FileCounterSiteExtension> type SiteExtensionStatus.json
{
  "provisioningState": "Failed",
  "operation": "install",
  "status": "BadRequest",
  "siteExtensionType": "Gallery",
  "comment": "System.IO.IOException: The process cannot access the file 'D:\\home\\SiteExtensions\\FileCounterSiteExtension' because it is being used by another process.\r\n   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)\r\n   at System.IO.Directory.DeleteHelper(String fullPath, String userPath, Boolean recursive, Boolean throwOnTopLevelDirectoryNotFound, WIN32_FIND_DATA& data)\r\n   at System.IO.Directory.Delete(String fullPath, String userPath, Boolean recursive, Boolean checkHost)\r\n   at System.IO.Abstractions.DirectoryWrapper.Delete(String path, Boolean recursive)\r\n   at Kudu.Core.Infrastructure.FileSystemHelpers.MoveDirectory(String sourceDirName, String destDirName) in C:\\Kudu Files\\Private\\src\\master\\Kudu.Core\\Infrastructure\\FileSystemHelpers.cs:line 78\r\n   at Kudu.Core.SiteExtensions.SiteExtensionManagerV2.<>c__DisplayClass27_1.<EnsureInstallationEnvironment>b__1() in C:\\Kudu Files\\Private\\src\\master\\Kudu.Core\\SiteExtensions\\SiteExtensionManagerV2.cs:line 525\r\n   at Kudu.Core.Infrastructure.OperationManager.<>c__DisplayClass2_0.<Attempt>b__0() in C:\\Kudu Files\\Private\\src\\master\\Kudu.Core\\Infrastructure\\OperationManager.cs:line 17\r\n   at Kudu.Core.Infrastructure.OperationManager.Attempt[T](Func`1 action, Int32 retries, Int32 delayBeforeRetry, Func`2 shouldRetry) in C:\\Kudu Files\\Private\\src\\master\\Kudu.Core\\Infrastructure\\OperationManager.cs:line 43\r\n   at Kudu.Core.Infrastructure.OperationManager.Attempt(Action action, Int32 retries, Int32 delayBeforeRetry) in C:\\Kudu Files\\Private\\src\\master\\Kudu.Core\\Infrastructure\\OperationManager.cs:line 15\r\n   at Kudu.Core.SiteExtensions.SiteExtensionManagerV2.EnsureInstallationEnvironment(String installationDir, ITracer tracer) in C:\\Kudu Files\\Private\\src\\master\\Kudu.Core\\SiteExtensions\\SiteExtensionManagerV2.cs:line 525\r\n   at Kudu.Core.SiteExtensions.SiteExtensionManagerV2.<InstallExtension>d__26.MoveNext() in C:\\Kudu Files\\Private\\src\\master\\Kudu.Core\\SiteExtensions\\SiteExtensionManagerV2.cs:line 479\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)\r\n   at Kudu.Core.SiteExtensions.SiteExtensionManagerV2.<TryInstallExtension>d__25.MoveNext() in C:\\Kudu Files\\Private\\src\\master\\Kudu.Core\\SiteExtensions\\SiteExtensionManagerV2.cs:line 259"
}

원인을 찾을 수 있습니다. 위의 경우 "D:\\home\\SiteExtensions\\FileCounterSiteExtension" 디렉터리가 잠겨 있다고 하는데요, Kudu Process Explorer에 들어가 떠 있는 프로세스 중에 "scm"이 붙은 cmd 프로세스들을 (어느 특정 프로세스겠지만 구분이 귀찮으니 ^^;) 모두 "Kill" 하시면 잠금이 풀리고 삭제가 됩니다. 이후, 다시 Extension을 설치 시도하면 정상적으로 동작합니다.

---

[이 글에 대해서 여러분들과 의견을 공유하고 싶습니다. 틀리거나 미흡한 부분 또는 의문 사항이 있으시면 언제든 댓글 남겨주십시오.]

[최초 등록일: 6/30/2021]
[최종 수정일: 6/30/2021]


이 저작물은 크리에이티브 커먼즈 코리아 저작자표시-비영리-변경금지 2.0 대한민국 라이센스에 따라 이용하실 수 있습니다.

by SeongTae Jeong, mailto:techsharer at outlook.com