330626482a
Diskimage-builder fails to build ubuntu-minimal images when run on a Ubuntu bionic-beaver (18.04) instance. The user gets "Couldn't create tempfiles for splitting up" when apt-get update is run in the ubuntu-minimal element root.d. The issue is that the /tmp inside the chroot is not getting the proper permissions applied from the base-files package. This is likely because the pip-cache element has already created the directory before the base-files package is installed. This patch changes the order of pip-cache to root.d/11-pip-cache so that it runs after teh base OS root.d elements run. Change-Id: I6fd1cb2a23422206884165eb502b260f0c1e52f7 |
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| .. | ||
| environment.d | ||
| root.d | ||
| README.rst | ||
README.rst
pip-cache
# Use a cache for pip
Using a download cache speeds up image builds.
Including this element in an image build causes $HOME/.cache/image-create/pip to be bind mounted as /tmp/pip inside the image build chroot. The $PIP_DOWNLOAD_CACHE environment variable is then defined as /tmp/pip, which causes pip to cache all downloads to the defined location.
Note that pip and its use of $PIP_DOWNLOAD_CACHE is not concurrency safe. Running multiple instances of diskimage-builder concurrently can cause issues. Therefore, it is advised to only have one instance of diskimage-builder that includes the pip-cache element running at a time.
The pip concurrency issue is being tracked upstream at https://github.com/pypa/pip/issues/1141