openshift:无法为python应用程序安装lxml

Question

我正在尝试Openshift，但我无法使用lxml部署python应用程序。

下面是我的步骤，我只是添加一个lxml要求。当我推的时候，错误就会发生。

我可以使用ssh，所以我不认为这是一个连接问题。

如果我不添加lxml要求但添加了一些其他库，它就能工作。

问题仅限于lxml。我认为这是因为它有一些系统依赖关系(我必须先在ubuntu机器上运行它：sudo apt-get install -y libxml2-dev libxslt-dev python-dev)

然而，我不认为我可以这样做的一个openshift应用程序。那么没有办法安装lxml吗？

命令

rhc app create testlxml python-3.3
echo 'lxml' > testlxml/requirements.txt
cd testlxml
git add .
git commit -m "Add lxml requirement"
git push

结果：

vagrant@dev:~$ rhc app create testlxml python-3.3
RSA 1024 bit CA certificates are loaded due to old openssl compatibility
Application Options
-------------------
Domain:     mikep
Cartridges: python-3.3
Gear Size:  default
Scaling:    no

Creating application 'testlxml' ... done


Waiting for your DNS name to be available ... done

Cloning into 'testlxml'...
Warning: Permanently added the RSA host key for IP address '54.84.57.164' to the list of known hosts.

Your application 'testlxml' is now available.

  URL:        http://testlxml-mikep.rhcloud.com/
  SSH to:     56c8e1a789f5cf57a3000116@testlxml-mikep.rhcloud.com
  Git remote: ssh://56c8e1a789f5cf57a3000116@testlxml-mikep.rhcloud.com/~/git/testlxml.git/
  Cloned to:  /home/vagrant/testlxml

Run 'rhc show-app testlxml' for more details about your app.

vagrant@dev:~$ echo 'lxml' > testlxml/requirements.txt
vagrant@dev:~$ cd testlxml
vagrant@dev:~/testlxml$ git add .
vagrant@dev:~/testlxml$ git status
On branch master
Your branch is up-to-date with 'origin/master'.

Changes to be committed:
  (use "git reset HEAD <file>..." to unstage)

        modified:   requirements.txt

vagrant@dev:~/testlxml$ git commit -m "Add lxml requirement"
[master c1776a9] Add lxml requirement
 1 file changed, 1 insertion(+)

vagrant@dev:~/testlxml$ git push
warning: push.default is unset; its implicit value is changing in
Git 2.0 from 'matching' to 'simple'. To squelch this message
and maintain the current behavior after the default changes, use:

  git config --global push.default matching

To squelch this message and adopt the new behavior now, use:

  git config --global push.default simple

When push.default is set to 'matching', git will push local branches
to the remote branches that already exist with the same name.

In Git 2.0, Git will default to the more conservative 'simple'
behavior, which only pushes the current branch to the corresponding
remote branch that 'git pull' uses to update the current branch.

See 'git help config' and search for 'push.default' for further information.
(the 'simple' mode was introduced in Git 1.7.11. Use the similar mode
'current' instead of 'simple' if you sometimes use older versions of Git)

Counting objects: 5, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (3/3), 270 bytes | 0 bytes/s, done.
Total 3 (delta 1), reused 0 (delta 0)
remote: Stopping Python 3.3 cartridge
remote: Waiting for stop to finish
remote: Waiting for stop to finish
remote: Building git ref 'master', commit c1776a9
remote: Activating virtenv
remote: Checking for pip dependency listed in requirements.txt file..
remote: The directory '/var/lib/openshift/56c8e1a789f5cf57a3000116/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
remote: The directory '/var/lib/openshift/56c8e1a789f5cf57a3000116/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
remote: Collecting lxml (from -r /var/lib/openshift/56c8e1a789f5cf57a3000116/app-root/runtime/repo/requirements.txt (line 1))
remote:   Downloading http://mirror1.ops.rhcloud.com/mirror/python/web/packages/source/l/lxml/lxml-3.5.0.tar.gz (3.8MB)
remote: Installing collected packages: lxml
remote:   Running setup.py install for lxml: started
Connection to testlxml-mikep.rhcloud.com closed by remote host.
fatal: The remote end hung up unexpectedly
error: error in sideband demultiplexer
To ssh://56c8e1a789f5cf57a3000116@testlxml-mikep.rhcloud.com/~/git/testlxml.git/
   cfd1b36..c1776a9  master -> master
error: failed to push some refs to 'ssh://56c8e1a789f5cf57a3000116@testlxml-mikep.rhcloud.com/~/git/testlxml.git/'

Answer 1

Openshift上一次检查时只能编译/安装'lxml==3.2.5‘。

将setup.py中的“requires”设置为‘lxml=3.2.5’。

Answer 2

解决方案：

最新版本的lxml (3.5.0)不能工作，但lxml==3.4.4可以工作。