I need to run a [Windows] Docker container as an executable, running a rather involved PowerShell script (invoking Java and .NET applications) and exiting. Docker documentation suggests using ENTRYPOINT
for this purpose. So I went ahead and created a Dockerfile with the following contents:
FROM microsoft/dotnet-framework
COPY run.ps1 /
ENTRYPOINT [ "powershell.exe", "C:\\run.ps1" ]
The contents of run.ps1
(uber-simplified for this question):
gci
write-host "looks like everything is good!"
Then, I ran the following commands:
# Build the Docker image
docker build --rm -t testdockerps .
# Create/run container using above image
docker run -it testdockerps
The container ran successfully, displaying the contents of C:\
followed by the message - looks like everything is good!
.
I have a couple of questions based on what my observations:
ENTRYPOINT
JSON array? Should I be using the SHELL
command in the Dockerfile?Yes you can specify powershell as default shell like below on top of DOCKERFILE
SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'Continue'; $verbosePreference='Continue';"]
I'm not sure you can do anything about time it takes to spin down your VM