下午好，
我试图安装odoo CRM到CentOS 6.7最小的虚拟机(RamNode)。我遵循的指南是:
https://odootricks.wordpress.com/2014/09/30/installing-odoo-8-on-centos-6-with-virtual-python-install/那么python 2.7将会带altinstall选项安装，所有的东西都将会在virtualenv上。
一切工作正常，直到安装pyopenssl。"pip install pyopenssl"命令失败，我无法使其工作…
已经尝试手动安装加密，更新了setuptools，更新了pip等，但似乎没有任何工作…
我已经尝试过的可能的解决方案:
pip install -U pip
pip install -U setuptools
yum install pyOpenSSL
yum install gcc libffi-devel python-devel openssl-devel
pip install --upgrade Distribute
yum -y install python-pip
我真的没有办法尝试了，任何帮助都将是非常感激的。
(odoo)[odoo@casilleros ~]$ pip install cryptography
Collecting cryptography
/home/odoo/odoo/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
InsecurePlatformWarning
Using cached cryptography-1.0.tar.gz
Requirement already satisfied (use --upgrade to upgrade): idna>=2.0 in ./odoo/lib/python2.7/site-packages (from cryptography)
Requirement already satisfied (use --upgrade to upgrade): pyasn1>=0.1.8 in ./odoo/lib/python2.7/site-packages (from cryptography)
Requirement already satisfied (use --upgrade to upgrade): six>=1.4.1 in ./odoo/lib/python2.7/site-packages (from cryptography)
Requirement already satisfied (use --upgrade to upgrade): setuptools in ./odoo/lib/python2.7/site-packages/setuptools-18.2-py2.7.egg (from cryptography)
Requirement already satisfied (use --upgrade to upgrade): enum34 in ./odoo/lib/python2.7/site-packages (from cryptography)
Requirement already satisfied (use --upgrade to upgrade): ipaddress in ./odoo/lib/python2.7/site-packages (from cryptography)
Requirement already satisfied (use --upgrade to upgrade): cffi>=1.1.0 in ./odoo/lib/python2.7/site-packages (from cryptography)
Requirement already satisfied (use --upgrade to upgrade): pycparser in ./odoo/lib/python2.7/site-packages (from cffi>=1.1.0->cryptography)
Building wheels for collected packages: cryptography
Running setup.py bdist_wheel for cryptography
Complete output from command /home/odoo/odoo/bin/python2.7 -c "import setuptools;__file__='/tmp/pip-build-Xoq8de/cryptography/setup.py';exec(compile(open(__file__).read().replace('rn', 'n'), __file__, 'exec'))" bdist_wheel -d /tmp/tmpEfTxmepip-wheel-:
running bdist_wheel
running build
running build_py
creating build
creating build/lib.linux-x86_64-2.7
creating build/lib.linux-x86_64-2.7/cryptography
copying src/cryptography/__init__.py -> build/lib.linux-x86_64-2.7/cryptography
copying src/cryptography/__about__.py -> build/lib.linux-x86_64-2.7/cryptography
copying src/cryptography/exceptions.py -> build/lib.linux-x86_64-2.7/cryptography
copying src/cryptography/utils.py -> build/lib.linux-x86_64-2.7/cryptography
copying src/cryptography/fernet.py -> build/lib.linux-x86_64-2.7/cryptography
creating build/lib.linux-x86_64-2.7/cryptography/x509
copying src/cryptography/x509/general_name.py -> build/lib.linux-x86_64-2.7/cryptography/x509
copying src/cryptography/x509/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/x509
copying src/cryptography/x509/base.py -> build/lib.linux-x86_64-2.7/cryptography/x509
copying src/cryptography/x509/name.py -> build/lib.linux-x86_64-2.7/cryptography/x509
copying src/cryptography/x509/oid.py -> build/lib.linux-x86_64-2.7/cryptography/x509
copying src/cryptography/x509/extensions.py -> build/lib.linux-x86_64-2.7/cryptography/x509
creating build/lib.linux-x86_64-2.7/cryptography/hazmat
copying src/cryptography/hazmat/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat
creating build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/hmac.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/constant_time.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/cmac.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/serialization.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/padding.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives
copying src/cryptography/hazmat/primitives/hashes.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives
creating build/lib.linux-x86_64-2.7/cryptography/hazmat/backends
copying src/cryptography/hazmat/backends/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends
copying src/cryptography/hazmat/backends/interfaces.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends
copying src/cryptography/hazmat/backends/multibackend.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends
creating build/lib.linux-x86_64-2.7/cryptography/hazmat/bindings
copying src/cryptography/hazmat/bindings/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/bindings
creating build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/interfaces
copying src/cryptography/hazmat/primitives/interfaces/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/interfaces
creating build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/twofactor
copying src/cryptography/hazmat/primitives/twofactor/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/twofactor
copying src/cryptography/hazmat/primitives/twofactor/utils.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/twofactor
copying src/cryptography/hazmat/primitives/twofactor/totp.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/twofactor
copying src/cryptography/hazmat/primitives/twofactor/hotp.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/twofactor
creating build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/kdf
copying src/cryptography/hazmat/primitives/kdf/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/kdf
copying src/cryptography/hazmat/primitives/kdf/pbkdf2.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/kdf
copying src/cryptography/hazmat/primitives/kdf/concatkdf.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/kdf
copying src/cryptography/hazmat/primitives/kdf/hkdf.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/kdf
creating build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/ciphers
copying src/cryptography/hazmat/primitives/ciphers/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/ciphers
copying src/cryptography/hazmat/primitives/ciphers/modes.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/ciphers
copying src/cryptography/hazmat/primitives/ciphers/base.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/ciphers
copying src/cryptography/hazmat/primitives/ciphers/algorithms.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/ciphers
creating build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/dsa.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/dh.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/rsa.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/padding.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/utils.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/asymmetric
copying src/cryptography/hazmat/primitives/asymmetric/ec.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/primitives/asymmetric
creating build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/commoncrypto
copying src/cryptography/hazmat/backends/commoncrypto/hmac.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/commoncrypto
copying src/cryptography/hazmat/backends/commoncrypto/backend.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/commoncrypto
copying src/cryptography/hazmat/backends/commoncrypto/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/commoncrypto
copying src/cryptography/hazmat/backends/commoncrypto/ciphers.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/commoncrypto
copying src/cryptography/hazmat/backends/commoncrypto/hashes.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/commoncrypto
creating build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/dsa.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/hmac.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/backend.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/rsa.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/cmac.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/x509.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/utils.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/ciphers.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/ec.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/openssl
copying src/cryptography/hazmat/backends/openssl/hashes.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/backends/openssl
creating build/lib.linux-x86_64-2.7/cryptography/hazmat/bindings/commoncrypto
copying src/cryptography/hazmat/bindings/commoncrypto/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/bindings/commoncrypto
copying src/cryptography/hazmat/bindings/commoncrypto/binding.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/bindings/commoncrypto
creating build/lib.linux-x86_64-2.7/cryptography/hazmat/bindings/openssl
copying src/cryptography/hazmat/bindings/openssl/__init__.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/bindings/openssl
copying src/cryptography/hazmat/bindings/openssl/binding.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/bindings/openssl
copying src/cryptography/hazmat/bindings/openssl/_conditional.py -> build/lib.linux-x86_64-2.7/cryptography/hazmat/bindings/openssl
running egg_info
writing requirements to src/cryptography.egg-info/requires.txt
writing src/cryptography.egg-info/PKG-INFO
writing top-level names to src/cryptography.egg-info/top_level.txt
writing dependency_links to src/cryptography.egg-info/dependency_links.txt
writing entry points to src/cryptography.egg-info/entry_points.txt
warning: manifest_maker: standard file '-c' not found
reading manifest file 'src/cryptography.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
no previously-included directories found matching 'docs/_build'
warning: no previously-included files matching '*' found under directory 'vectors'
writing manifest file 'src/cryptography.egg-info/SOURCES.txt'
running build_ext
generating cffi module 'build/temp.linux-x86_64-2.7/_padding.c'
creating build/temp.linux-x86_64-2.7
generating cffi module 'build/temp.linux-x86_64-2.7/_constant_time.c'
generating cffi module 'build/temp.linux-x86_64-2.7/_openssl.c'
building '_openssl' extension
creating build/temp.linux-x86_64-2.7/build
creating build/temp.linux-x86_64-2.7/build/temp.linux-x86_64-2.7
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/usr/local/include/python2.7 -c build/temp.linux-x86_64-2.7/_openssl.c -o build/temp.linux-x86_64-2.7/build/temp.linux-x86_64-2.7/_openssl.o
build/temp.linux-x86_64-2.7/_openssl.c:1735: warning: function declaration isn’t a prototype
gcc: Internal error: Killed (program cc1)
Please submit a full bug report.
See <http://bugzilla.redhat.com/bugzilla> for instructions.
error: command 'gcc' failed with exit status 1
----------------------------------------
Failed building wheel for cryptography
Failed to build cryptography
Installing collected packages: cryptography
Running setup.py install for cryptography
Complete output from command /home/odoo/odoo/bin/python2.7 -c "import setuptools, tokenize;__file__='/tmp/pip-build-Xoq8de/cryptography/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('rn', 'n'), __file__, 'exec'))" install --record /tmp/pip-d1Fqxd-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/odoo/odoo/include/site/python2.7/cryptography:
running install
running build
running build_py
running egg_info
writing requirements to src/cryptography.egg-info/requires.txt
writing src/cryptography.egg-info/PKG-INFO
writing top-level names to src/cryptography.egg-info/top_level.txt
writing dependency_links to src/cryptography.egg-info/dependency_links.txt
writing entry points to src/cryptography.egg-info/entry_points.txt
warning: manifest_maker: standard file '-c' not found
reading manifest file 'src/cryptography.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
no previously-included directories found matching 'docs/_build'
warning: no previously-included files matching '*' found under directory 'vectors'
writing manifest file 'src/cryptography.egg-info/SOURCES.txt'
running build_ext
generating cffi module 'build/temp.linux-x86_64-2.7/_padding.c'
already up-to-date
generating cffi module 'build/temp.linux-x86_64-2.7/_constant_time.c'
already up-to-date
generating cffi module 'build/temp.linux-x86_64-2.7/_openssl.c'
building '_openssl' extension
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/usr/local/include/python2.7 -c build/temp.linux-x86_64-2.7/_openssl.c -o build/temp.linux-x86_64-2.7/build/temp.linux-x86_64-2.7/_openssl.o
build/temp.linux-x86_64-2.7/_openssl.c:1735: warning: function declaration isn’t a prototype
gcc: Internal error: Killed (program cc1)
Please submit a full bug report.
See <http://bugzilla.redhat.com/bugzilla> for instructions.
error: command 'gcc' failed with exit status 1
----------------------------------------
Command "/home/odoo/odoo/bin/python2.7 -c "import setuptools, tokenize;__file__='/tmp/pip-build-Xoq8de/cryptography/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('rn', 'n'), __file__, 'exec'))" install --record /tmp/pip-d1Fqxd-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/odoo/odoo/include/site/python2.7/cryptography" failed with error code 1 in /tmp/pip-build-Xoq8de/cryptography
听起来您可能需要使用您的软件包管理器，sudo apt-get install或同等设备来安装openssl和openssl-dev(可能作为超级用户)。