The release of pip10 has shown up a few issues here
Firstly, pip10 now refuses to overwrite distutils installed packages,
which includes "python-virtualenv" on centos. History has shown us
that we want the packages installed and overwritten, to avoid the
packages coming back and messing things up.
Pre-install all the packages, then list the files in the packages with
"rpm" directly and remove them. This way pip is happy to install.
We need to take better account of the package names for this; on
Fedora things have switch to "python2-virtualenv" instead of
"python-virtualenv" and we can't use an alias to list the package
contents.
This also highlighted that python2-pip is in EPEL for centos, so
enable that when we install it. Make the epel element a no-op for non
centos/rhe distros.
There is a related change in recent fedora that python3 now installs
binaries into /usr/local/bin. There are commented swizzles in here to
ensure we retain the status quo of "pip" and "virtualenv" both being
python2 based, with the python3 versions being called explicitly
"pip3" and "virtualenv3" respectively.
Change-Id: I2ffdd9f615ae6b00428c17249e4f216774991b99
We added this sed in I422490ebe9a9c655552685bc2ff342d288335a9c to
avoid installing python2 packages on python3-only systems and thus
dragging in all of python2.
We made a similar change to python-pip in
I7d8ba9300039cce90965410a4e16ca9e711904c3; however we realised that
the gate (and other consumers) were relying on this element having
installed the python2 & 3 packages for consistency -- otherwise jobs
would install the python-pip packages and overwrite the
pip-from-source and mess everything up. We reverted that in
I419dbdf4682394db68974944af1e5c432f3e0565 and added some clearer notes
that this element brings in python2 & 3, and if you want something
that doesn't do that then this element isn't for you.
However, we never fixed up the virtualenv package install -- currently
our Xenial images have a global virtualenv installed from source, but
the python-virtualenv packages aren't installed. Thus if a job does
"apt-get install python-virtualenv" it overwrites the from-source
virtualenv with older parts and again messes everything up.
Probably most jobs just call "virtualenv" and assume it is there;
however in bringing up some rspec test for puppet I have hit this
issue as some modules specify dependencies on the virtualenv packages.
Thus install the python-virtualenv AND python3-virtualenv packages in
this element.
Change-Id: Ia84c38dc3c40a6080e144b563e10abca7dac2881
This reverts commit ab89c7d69c.
This commit checked for DIB_PYTHON_VERSION and only installed the v3
packages. This is unfortunately backwards-incompatible, as consumers
such as the openstack gate are relying on this package installing pip
& virtualenv packages for python2 AND python3.
This was sort-of expressed in the docs, where it discusses what the
resulting setup of the system will be, but I've added a note to make
it clearer.
If we want to change this, I think we'll need either a new element, or
a non-defaulting flag.
Change-Id: I419dbdf4682394db68974944af1e5c432f3e0565
We want to install python3-pip, not python-pip when we are building a
py3k image less we pull in python2. Once we stop installing python2 we
have to stop calling python2 during pip install.
Change-Id: I7d8ba9300039cce90965410a4e16ca9e711904c3
On ubuntu we detect that in python3 we need to install
python3-virtualenv, but append this to the packages to install rather
than replace python-virtualenv which results in both being installed
(and therefore grabbing python2).
Change-Id: I422490ebe9a9c655552685bc2ff342d288335a9c
Closes-Bug: #1724656
On a system where the packaged pip/virtualenv is up-to-date with
upstream (such as Fedora 26 ... for now), we don't reinstall, which
then violates a bunch of assumptions later on. Force install.
Change-Id: I6ebcda0351997fa7e32f0e6e77a98b2c33764e3f
The 'packages' variable already contains the packages we need so
use it instead of duplicating the packages.
Change-Id: Id22e1862f9654e66252d03a0fed9839cf004d750
Several people have popped up in IRC recently with failures in these
elements. Without Python 2.7 available in the image they are
unsupported (OpenStack hasn't supported it for a long time). Remove
these to avoid further confusion.
The centos/centos7 DISTRO split that has happened with centos-minimal
is unfortunate but I don't think it helps to rename centos7/rhel7 ATM.
To summarise; DISTRO=centos7 means image based build,
DISTRO=centos && DIB_RELEASE=7 means the minimal build.
In the future, I think it is important that the minimal builds and
image builds set the same DISTRO. This reflects that "upper" layers
shouldn't care about the exact building of the lower layers. I see
CentOS 8 going one of two ways
1) the changes are so significant, we start separate centos8 /
centos8-minimal elements. They both set DISTRO=centos8 (and
DIB_RELEASE to point-release maybe?). This means we have to update
all "if DISTRO == centos || DISTRO == centos7" branches to also check
for "centos8". Evenually (!) "centos" goes away for versioned DISTRO
only
2) we restore centos element with DISTRO=centos and DIB_RELEASE=8, and
centos-minimal remains the same. This means we have to audit all "if
DISTRO == centos" calls to make sure they're appropriate for version 8
(stick a "&& DIB_RELEASE=7" on them all basically).
I'm not sure we can fully decide until we start to see excatly how the
distro switching/matching bits look, but (2) is consistent with Ubuntu
and probably the preferred solution.
Some "rhel" parts have been cleaned up. More could be done in
rhel-common, but given our lack of coverage of that I'd prefer to
leave it for now.
Change-Id: I6ea784116ef59ca22878c8512c963f29c815a00a
If DIB_PYTHON_VERSION is < 3 on the !redhat path, that means we're on
an older platform that may not have python3-virtualenv packages. Skip
install.
Ensure the order of operations happens by forcing the installs
Also add a note about limited platform support (patches welcome :)
Change-Id: I18412767f0ebf946d557a0a126285369e96af159
Recent changes in project-config have shown that we leave the system
in an inconsistent state when installing from source. On fedora, we
will have installed the python2 packages, but then used $DIB_PYTHON to
install python3 pip from source!
This tries to clarify the situation. As described in the document,
with package installs, we just install the $DIB_PYTHON packaged
versions.
Source installs want to take over the global namespace. This is the
price you pay for running the latest versions outside package managers
:) The only sane thing seems to be for us to normalise python2 &
python3 versions of pip, setuptools and virtualenv and then hacking
things such that "/usr/bin/pip" and "/usr/bin/virtalenv" remain
defaulted to python2 versions.
Documentation is added
Change-Id: Ibc6572b89e256d1f48b7fe7c672b8b9524dc704f
Currently we install pip/virtualenv with "/usr/local/bin/dib-python".
This means that every time you create a virtualenv, the python
interpreter inside it is called "dib-python" which is confusing.
Add an env var DIB_PYTHON that points directly the to interpreter
available during build, for use when running scripts.
Change-Id: I88ad3c9eb958d58db4631d9b27bc2c592f970345
Currently we have all our elements and library files in a top-level
directory and install them into
<root>/share/diskimage-builder/[elements|lib] (where root is either /
or the root of a virtualenv).
The problem with this is that editable/development installs (pip -e)
do *not* install data_files. Thus we have no canonical location to
look for elements -- leading to the various odd things we do such as a
whole bunch of guessing at the top of disk-image-create and having a
special test-loader in tests/test_elements.py so we can run python
unit tests on those elements that have it.
data_files is really the wrong thing to use for what are essentially
assets of the program. data_files install works well for things like
config-files, init.d files or dropping documentation files.
By moving the elements under the diskimage_builder package, we always
know where they are relative to where we import from. In fact,
pkg_resources has an api for this which we wrap in the new
diskimage_builder/paths.py helper [1].
We use this helper to find the correct path in the couple of places we
need to find the base-elements dir, and for the paths to import the
library shell functions.
Elements such as svc-map and pkg-map include python unit-tests, which
we do not need tests/test_elements.py to special-case load any more.
They just get found automatically by the normal subunit loader.
I have a follow-on change (I69ca3d26fede0506a6353c077c69f735c8d84d28)
to move disk-image-create to a regular python entry-point.
Unfortunately, this has to move to work with setuptools. You'd think
a symlink under diskimage_builder/[elements|lib] would work, but it
doesn't.
[1] this API handles stuff like getting files out of .zip archive
modules, which we don't do. Essentially for us it's returning
__file__.
Change-Id: I5e3e3c97f385b1a4ff2031a161a55b231895df5b
