Installing Python to a ramdisk takes quite a long time because of
the way dracut checks for dependencies of every single file
installed. We could avoid that, but then we might miss a required
library file.
This change alters the installation method to speed up
the process. First, it creates a list of files that are needed and
then installs them all at once using inst_multiple instead of calling
inst on each file separately. This doesn't make a huge difference,
but in my testing it is marginally faster.
Second, and more significantly, we don't need the *.pyo and *.pyc
files as those are simply an optimization to speed up module
loading. Because the deploy ramdisk is a short-lived operation,
we probably lose more time transferring those extra files to the
target system than we save in improved load times.
In my testing, these two changes netted about a 20% improvement
in build times, and about 13% decrease in image size.
Change-Id: Ibc2b778c28fc9fb7177380dffe8dbce5722d0733
The targetcli element was triggering a bunch of errors from dracut
when we installed all of Python. It turns out this is because there
were filenames with spaces in the find output and the loop didn't
handle that properly. This switches to a while loop that can
handle odd filenames.
Change-Id: Iacbf16f26f2bc9991840250dc8ae7990db54d811
RHEL 7 does not ship tgtadm or tgtd so they cannot be used in the
deploy ramdisk. This change separates the tgt-specific parts of
the ramdisk into their own element, and adds a new one that supports
targetcli instead.
For now, the tgt implementation can only be used with traditional
busybox ramdisks and the targetcli one can only be used with dracut.
This is because dracut is primarily used for RHEL right now so it
makes sense to keep the dependencies simple. If there is a future
desire to mix and match the implementations that could be done, but
it would require users to explicitly select between tgt and
targetcli.
Change-Id: I4f99c91016287e08d836095c2f2261de8b45abdc
Co-Authored-By: James Slagle <jslagle@redhat.com>
