CiscoDevNet
ydk installation issues on some CentOS environments
- Need to fix
ydk 0.6.0installation for core so that cmake3 or cmake is used without having to link the binary - ydk installation should not assume shared library for python is installed
[ 50%] Building CXX object CMakeFiles/ydk_.dir/python.cpp.o
/tmp/pip-build-uotkxcx1/ydk/python.cpp:551:198: warning: unused parameter ���port��� [-Wunused-parameter]
[](ydk::NetconfServiceProvider &nc_provider, const string& address, const string& username, const string& password, void* port, const string& protocol, bool on_demand, bool common_cache) {
^
/tmp/pip-build-uotkxcx1/ydk/python.cpp:551:198: warning: unused parameter ���port��� [-Wunused-parameter]
[100%] Linking CXX shared module ../lib.linux-x86_64-3.6/ydk_.so
/usr/bin/ld: /usr/local/lib/python3.6/config-3.6m-x86_64-linux-gnu/libpython3.6m.a(abstract.o): relocation R_X86_64_32S against `_Py_NotImplementedStruct' can not be used when making a shared object; recompile with -fPIC
/usr/local/lib/python3.6/config-3.6m-x86_64-linux-gnu/libpython3.6m.a: error adding symbols: Bad value
collect2: error: ld returned 1 exit status
gmake[2]: *** [../lib.linux-x86_64-3.6/ydk_.so] Error 1
gmake[1]: *** [CMakeFiles/ydk_.dir/all] Error 2
gmake: *** [all] Error 2
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-build-uotkxcx1/ydk/setup.py", line 157, in <module>
zip_safe=False,
File "/usr/local/lib/python3.6/distutils/core.py", line 148, in setup
dist.run_commands()
File "/usr/local/lib/python3.6/distutils/dist.py", line 955, in run_commands
self.run_command(cmd)
File "/usr/local/lib/python3.6/distutils/dist.py", line 974, in run_command
cmd_obj.run()
File "/users/skopperl/cafy_env/lib/python3.6/site-packages/setuptools/command/install.py", line 61, in run
return orig.install.run(self)
File "/usr/local/lib/python3.6/distutils/command/install.py", line 545, in run
self.run_command('build')
File "/usr/local/lib/python3.6/distutils/cmd.py", line 313, in run_command
self.distribution.run_command(command)
File "/usr/local/lib/python3.6/distutils/dist.py", line 974, in run_command
cmd_obj.run()
File "/usr/local/lib/python3.6/distutils/command/build.py", line 135, in run
self.run_command(cmd_name)
File "/usr/local/lib/python3.6/distutils/cmd.py", line 313, in run_command
self.distribution.run_command(command)
File "/usr/local/lib/python3.6/distutils/dist.py", line 974, in run_command
cmd_obj.run()
File "/tmp/pip-build-uotkxcx1/ydk/setup.py", line 69, in run
self.build_extension(ext)
File "/tmp/pip-build-uotkxcx1/ydk/setup.py", line 94, in build_extension
subprocess.check_call(['cmake', '--build', '.'], cwd=self.build_temp)
File "/usr/local/lib/python3.6/subprocess.py", line 291, in check_call
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['cmake', '--build', '.']' returned non-zero exit status 2.
----------------------------------------
Currently, there is a need to rebuild python library on some CentOS environments with --enable-shared option to compile ydk-py. Could be fixed with #626
Couple of troubleshooting workarounds for CentOS:
You may face the below issues when doing something like pip install ydk on CentOS:
1) python installation does not have shared libraries
You may see something like the below error:
...
[100%] Linking CXX shared module ../lib.linux-x86_64-2.7/ydk_.so
/usr/bin/ld: /usr/local/lib/libpython2.7.a(abstract.o): relocation R_X86_64_32S against `_Py_NotImplementedStruct' can not be used when making a shared object; recompile with -fPIC
...
To fix this, you need to compile the python installation with the --enable-shared option as follows (steps obtained from google search):
- Retrieve the sources from the official website: http://www.python.org/download/
- Unpack, compile and install Python (any version, here with Python 2.7):
cd <compilation-directory>
tar jvzf Python-2.7.tar.bz2
cd Python-2.7
./configure --enable-shared [--prefix=/your/custom/installation/path]
make
make test
make install
2) cmake cannot find the correct python install location
...
python version: 3.6m
-- Found PythonLibs: /usr/local/lib/libpython2.7.a (found version "2.7")
pybind11 include: /root/user/Python-3.6.2/include/python3.6m;/root/.local/include/python3.6m
...
[100%] Linking CXX shared module ../lib.linux-x86_64-3.6/ydk_.so
/usr/bin/ld: /usr/local/lib/libpython2.7.a(abstract.o): relocation R_X86_64_32S against `_Py_NotImplementedStruct' can not be used when making a shared object; recompile with -fPIC
/usr/local/lib/libpython2.7.a: error adding symbols: Bad value
...
To fix this, please set the below environment variables before running 'pip install ...' For example, in bash:
export CMAKE_INCLUDE_PATH=/root/path_of_python_installation/Python-3.6.2/include
export CMAKE_LIBRARY_PATH=/root/path_of_python_installation/Python-3.6.2/lib
3) If facing issues with ydk installation in /usr/lib64 vs /usr/lib
- See #524 for details and workaround
- If facing issues with
pip, another option is to useeasy_installto install ydk-models-openconfig & other bundles
$ sudo easy_install -v --install-dir="/usr/lib64/python2.7/site-packages" ydk-models-ietf
$ sudo easy_install -v --install-dir="/usr/lib64/python2.7/site-packages" ydk-models-openconfig
$ sudo easy_install -v --install-dir="/usr/lib64/python2.7/site-packages" ydk-models-cisco-ios-xr
devtools-4 are no longer available on centos 7.
Using default compiler gave me this error when importing ydk.services: undefined symbol: _ZSt24__throw_out_of_range_fmtPKcz
furthermore, --install-purelib option does not work with recent pip versions
Here's what worked for me: ` [root@controller ~]# yum install devtoolset-7-gcc* [root@controller ~]# ln -sf /opt/rh/devtoolset-7/root/usr/bin/gcc /usr/bin/cc [root@controller ~]# ln -sf /opt/rh/devtoolset-7/root/usr/bin/g++ /usr/bin/c++
pip3 install --target="/usr/local/lib64/python3.6/site-packages" --no-deps ydk-models-ietf ydk-models-openconfig ydk-models-cisco-ios-xr ydk-models-cisco-ios-xe --upgrade pip3 install ydk `
