【发布时间】：2020-05-08 21:48:46
【问题描述】：
我最近不得不更新 docker（2.2.0.0 stable 42247），现在我在使用 docker-compose 的 docker 容器中运行 dotnet watch 时遇到问题。
我的工作流程是将解决方案目录（在主机上）挂载到在相关项目上运行 dotnet watch 的 docker 容器上，初始版本看起来有点像这样：
./docker-compose.yml
version: "3.2"
services:
my-api:
build:
context: $MY_API_LOCATION_ON_HOST # the folder with the .sln file and all projects
dockerfile: $DOCKERFILE_ROOT/Dockerfile-aspcore-dev
args:
PROJECT: app/src/MyApi # Where the .csproj will be
volumes:
- type: bind
source: $MY_API_LOCATION_ON_HOST # the folder with the .sln file and all projects
target: /app
- type: bind
source: $SECRETS_FOLDER # C:\Users\DevUser\AppData\Roaming\Microsoft\UserSecrets
target: /root/.microsoft/usersecrets
./Dockerfile-aspcore-dev
FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS base
ARG PROJECT
WORKDIR ${PROJECT}
ENTRYPOINT ["dotnet", "watch", "run", "--urls", "http://0.0.0.0:5000"]
它会成功运行。更新后出现以下错误：
docker-compose up --build --force-recreate my-api
Building my-api
Step 1/4 : FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS base
---> 2fe8fe202baf
Step 2/4 : ARG PROJECT
---> Using cache
---> cee4bd05745b
Step 3/4 : WORKDIR ${PROJECT}
---> Using cache
---> ed12fa68fc7e
Step 4/4 : ENTRYPOINT ["dotnet", "watch", "run", "--urls", "http://0.0.0.0:5000"]
---> Using cache
---> 6c0b8b95cd8e
Successfully built 6c0b8b95cd8e
Successfully tagged src_my-api:latest
Recreating src_my-api_1 ... done
Attaching to src_my-api_1
my-api_1 | System.IO.FileNotFoundException: Unable to find the specified file.
my-api_1 | at Interop.Sys.GetCwdHelper(Byte* ptr, Int32 bufferSize)
my-api_1 | at Interop.Sys.GetCwd()
my-api_1 | at System.Environment.get_CurrentDirectory()
my-api_1 | at System.IO.Directory.GetCurrentDirectory()
my-api_1 | at Microsoft.DotNet.CommandFactory.CommandResolver.TryResolveCommandSpec(ICommandResolverPolicy
commandResolverPolicy, String commandName, IEnumerable`1 args, NuGetFramework framework, String configuration, String outputPath,
String applicationName)
my-api_1 | at Microsoft.DotNet.CommandFactory.CommandFactoryUsingResolver.Create(ICommandResolverPolicy commandResolverPolicy, String commandName, IEnumerable`1 args, NuGetFramework framework, String configuration, String outputPath, String applicationName)
my-api_1 | at Microsoft.DotNet.Cli.Program.ProcessArgs(String[] args, ITelemetry telemetryClient)
my-api_1 | at Microsoft.DotNet.Cli.Program.Main(String[] args)
src_my-api_1 exited with code 1
此输出以及我的临时解决方法表明，这与无法弄清楚 cwd 或 pwd 是什么有关，而不是 dotnet watch 的问题。解决方法如下：
./docker-compose.yml
version: "3.2"
services:
my-api:
+ tty: true
+ stdin_open: true
working_dir: /app/src/MyApi # Where the .csproj will be
build:
context: $MY_API_LOCATION_ON_HOST
dockerfile: $DOCKERFILE_ROOT/Dockerfile-aspcore-dev
volumes:
- type: bind
source: $MY_API_LOCATION_ON_HOST # the folder with the .sln file and all projects
target: /app
- type: bind
source: $SECRETS_FOLDER # C:\Users\DevUser\AppData\Roaming\Microsoft\UserSecrets
target: /root/.microsoft/usersecrets
./Dockerfile-aspcore-dev
FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS base
ARG PROJECT
WORKDIR ${PROJECT}
- ENTRYPOINT ["dotnet", "watch", "run", "--urls", "http://0.0.0.0:5000"]
运行：
docker-compose up --build --force-recreate search-api
Building search-api
Step 1/3 : FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS base
---> 2fe8fe202baf
Step 2/3 : ARG PROJECT
---> Using cache
---> cee4bd05745b
Step 3/3 : WORKDIR ${PROJECT}
---> Using cache
---> ed12fa68fc7e
Successfully built ed12fa68fc7e
Successfully tagged src_search-api:latest
Recreating src_search-api_1 ... done
Attaching to src_search-api_1
然后运行：
docker exec -it src_my-api_1 dotnet "watch" "run" "--urls" "http://0.0.0.0:5000"
watch : Polling file watcher is enabled
watch : Started
watch : Exited
watch : File changed: /app/src/MyApi/Constants.cs
watch : Started
...
另外运行类似
FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS base
ARG PROJECT
WORKDIR ${PROJECT}
ENTRYPOINT ["dotnet", "fsx"]
会产生非常相似的错误
docker-compose up --build --force-recreate my-api
Building my-api
Step 1/4 : FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS base
---> 2fe8fe202baf
Step 2/4 : ARG PROJECT
---> Using cache
---> cee4bd05745b
Step 3/4 : WORKDIR ${PROJECT}
---> Using cache
---> ed12fa68fc7e
Step 4/4 : ENTRYPOINT ["dotnet", "fsx"]
---> Running in eaa49fc2294c
Removing intermediate container eaa49fc2294c
---> f2f4f212d0e9
Successfully built f2f4f212d0e9
Successfully tagged src_my-api:latest
Recreating src_my-api_1 ... done
Attaching to src_my-api_1
my-api_1 | System.IO.FileNotFoundException: Unable to find the specified file.
my-api_1 | at Interop.Sys.GetCwdHelper(Byte* ptr, Int32 bufferSize)
my-api_1 | at Interop.Sys.GetCwd()
my-api_1 | at System.Environment.get_CurrentDirectory()
my-api_1 | at System.IO.Directory.GetCurrentDirectory()
my-api_1 | at Microsoft.DotNet.CommandFactory.CommandResolver.TryResolveCommandSpec(ICommandResolverPolicy
commandResolverPolicy, String commandName, IEnumerable`1 args, NuGetFramework framework, String configuration, String outputPath,
String applicationName)
my-api_1 | at Microsoft.DotNet.CommandFactory.CommandFactoryUsingResolver.Create(ICommandResolverPolicy commandResolverPolicy, String commandName, IEnumerable`1 args, NuGetFramework framework, String configuration, String outputPath, String applicationName)
my-api_1 | at Microsoft.DotNet.Cli.Program.ProcessArgs(String[] args, ITelemetry telemetryClient)
my-api_1 | at Microsoft.DotNet.Cli.Program.Main(String[] args)
src_my-api_1 exited with code 1
【问题讨论】：
-
我们观察到同样的错误，只能通过在 Windows 主机上从 2.2.0.0 降级到 2.1.0.5 来解决它
-
我在 Windows 10 上遇到了同样的问题。从 2.2.0.0 降级到 2.1.05 也修复了我的错误。
标签： .net docker .net-core docker-compose