问题
I have a python wheel uploaded to an azure storage account that is mounted in a databricks service. I'm trying to install the wheel using a cluster init script as described in the databricks documentation.
My storage is definitely mounted and my file path looks correct to me. Running the command display(dbutils.fs.ls("/mnt/package-source")) in a notebook yields the result:
path: dbfs:/mnt/package-source/parser-3.0-py3-none-any.whl
name: parser-3.0-py3-none-any.whl
I have tried to install the wheel from a cluster init file using this command:
/databricks/python/bin/pip install "dbfs:/mnt/package-source/parser-3.0-py3-none-any.whl"
but the cluster fails to start. It's logs give me an error saying it can't find the file:
WARNING: Requirement 'dbfs:/mnt/package-source/parser-3.0-py3-none-any.whl' looks like a filename, but the file does not exist
ERROR: Could not install packages due to an EnvironmentError: [Errno 2] No such file or directory: '/dbfs:/mnt/package-source/parser-3.0-py3-none-any.whl'
I have also tried it this way:
/databricks/python/bin/pip install /mnt/package-source/parser-3.0-py3-none-any.whl
but I get a similar error:
WARNING: Requirement '/mnt/package-source/parser-3.0-py3-none-any.whl' looks like a filename, but the file does not exist
ERROR: Could not install packages due to an EnvironmentError: [Errno 2] No such file or directory: '/mnt/package-source/parser-3.0-py3-none-any.whl'
I've even tried using relative paths such as ../../mnt/package-source/... but to no avail. Can anyone tell me what I'm doing wrong please?
Related question: Azure Databricks cluster init script - install python wheel
回答1:
I got it working using a relative path. It turns out ../../mnt/ wasn't the correct path. It worked using ../../../dbfs/mnt/. It just took a bit of exploring the file system using the bash ls command to find it.
For anyone else experiencing the same problem, I suggest starting with something like this in a notebook:
%%sh
ls ../../../
来源：https://stackoverflow.com/questions/61080018/azure-databricks-cluster-init-script-install-wheel-from-mounted-storage