Article
Victor Sanner · Apr 20 2m read

Accessing an intersystems cache database inside a docker container + using Azure Functions

Hi,

I have wrote an article about how to install the intersystems cache driver in a Docker container, and then deploy it using Azure Functions: 

How to run a (Python) Azure Function as a Docker container & Deploy it using Bicep | Victor Sanner

This might be useful to others, especially the dockerfile which I have copied below. This builds a debian docker container and installs the Intersystems Cache driver, which python can then use :)

To enable ssh & remote debugging on app service change the base image to the one below
# FROM mcr.microsoft.com/azure-functions/python:3.0-python3.6-appservice
FROM mcr.microsoft.com/azure-functions/python:3.0-python3.6

ENV AzureWebJobsScriptRoot=/home/site/wwwroot \
    AzureFunctionsJobHost__Logging__Console__IsEnabled=true

# Add ODBC Driver requirements 
RUN apt-get update \
 && apt-get install unixodbc -y \
 && apt-get install unixodbc-dev -y \
 && apt-get install freetds-dev -y \
 && apt-get install freetds-bin -y \
 && apt-get install tdsodbc -y \
 && apt-get install --reinstall build-essential -y

# add pyodbc requirements
RUN apt-get install python-pyodbc -y

#copy the driver to container
COPY /Driver /usr/lib/intersystems/odbc

#run install script
RUN /usr/lib/intersystems/odbc/ODBCinstall

#copy the odbc configuration file to the container
COPY odbc.ini /etc/intersystemsodbc.ini

#make the odbc library aware that we have added a new driver
RUN odbcinst -i -d -f /etc/intersystemsodbc.ini

#symlink the odbc driver, not sure if its required
RUN ln -s /usr/lib/x86_64-linux-gnu/libodbccr.so.2.0.0 /usr/lib/x86_64-linux-gnu/odbc/libodbccr.so

#copy the Azure Functions project to the docker image
COPY . /home/site/wwwroot

#install the python libraries as you would usually do
RUN cd /home/site/wwwroot && pip install -r requirements.txt

I hope this saves some people a lot of time, because it was quite a challenge to build this!

 

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