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。

以下是我的步骤，我只是添加lxml 要求。当我推送时发生错误。

我可以 ssh，所以我认为这不是连接问题。

如果我不添加 lxml 要求而是添加一些其他库，它可以工作。

问题仅在于 lxml。我认为是因为它有一些系统依赖（我之前必须在 ubuntu 机器上运行这个：sudo apt-get install -y libxml2-dev libxslt-dev python-dev）

但是我认为我不能为 openshift 应用程序执行此操作。那有没有办法安装lxml呢？

---

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 只能在我上次检查时编译/安装“lxml==3.2.5”。

将 setup.py 中的“要求”设置为“lxml==3.2.5”。

Answer 2

解决方案：

最新版本的lxml (3.5.0) 不工作，但lxml==3.4.4 工作。