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Using LabVIEW in a Docker Container

Hi John

 

This response might be a little late and you've already got this working. I just found it strange that you couldn't get the silent install of the RTE working and had to resort to using .msi files. So I fired up container using the windowsservercore image and gave it a shot. I used the LV 18 RTE (LVRTE2018_f2Patch-64std.exe) and from the log the install finished without (significant) error. 

 

The trick I used for the install was to not directly call the above .exe in the container. It is a selfextracting archive so firstly I ran it on my host, deselecting the autorun of .\setup.exe. If you don't change the default path the files end up at is "C:\National Instruments Downloads\LabVIEW\Run-Time Engine\2018 (64-bit) f2 patch\Standard"

 

I mapped the entire "Standard" folder to the container and ran the following install command in the folder:

.\setup /q /acceptlicenses yes /r /log C:\Users\Public\log.txt /disableNotificationCheck

 

To monitor the install progress I simply kept checking the size of the log.txt file. I assumed the install was done when the size was fixed for a number of checks 🙂

 

I confirmed that the RTE was working by building a dll from some VIs adding and subtracting numbers and calling the dll from a Python script in the container. 

 

I didn't use a dockerfile for the install, I did it all interactively and then commited a new image from the container, so as a next step I'm going to create a dockerfile that does the same thing. I'll post back with results if anyone is still interested?

 

Best Regards

 

David

Senior Systems Engineer

Northern European Region

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We've converted some of our LabVIEW code to run under a Linux docker container. We're using only the LabVIEW runtime engine in the container, not the development environment. We've made the application headless by building it as a shared library with a wrapper. The approach is outlined here: https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z0000019RYlSAM&l=en-US

 

One useful thing that article leaves out is the use of LVDLLStatus. If you're having problems interfacing with your LabVIEW code in the C wrapper, it can tell you what the problem is. As with any LabVIEW function involving strings being called from C, the function doesn't return a pointer to a string. Instead, you have to allocate the memory yourself before you call LabVIEW and pass the pointer.

 

char *ErrStr;
int ErrStrLen = 1000;
ErrStr = malloc(ErrStrLen);
LVDLLStatus(ErrStr, ErrStrLen, NULL);
printf("LVDLL Status: %s\n", ErrStr);
free(ErrStr);

 

The Dockerfile if anyone is interested...

 

 

FROM centos

# Install labview runtime
RUN mkdir ~/LabVIEW_Runtime
RUN curl -o /root/LabVIEW_Runtime/runtime.tgz \
	http://download.ni.com/support/softlib/labview/labview_runtime/2018/Linux/f1/LabVIEW2018f1RTE_Linux.tgz
RUN cd /root/LabVIEW_Runtime ; tar xf ./runtime.tgz ; rm -f ./runtime.tgz
RUN rpm -Uvh /root/LabVIEW_Runtime/*.rpm
RUN rm -rf ~/LabVIEW_Runtime

 

Then you'll need to use COPY and RUN to install your application, figure out how you're going to do networking (expose/publish), and start the thing using ENTRYPOINT.

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