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Beginner

Shared Libraries Error while installing ydk

Hi,
I have included the python installation in LD_LIBRARY_PATH, but while installing ydk through "pip install ydk", I am getting the following error:

/tmp/pip-install-5vc0wm56/ydk/python.cpp:541:39: warning: unused parameter ‘left’ [-Wunused-parameter]
.def("__eq__", [](ydk::Empty& left, ydk::Empty& right)
^
/tmp/pip-install-5vc0wm56/ydk/python.cpp:541:57: warning: unused parameter ‘right’ [-Wunused-parameter]
.def("__eq__", [](ydk::Empty& left, ydk::Empty& right)
^
/tmp/pip-install-5vc0wm56/ydk/python.cpp:545:39: warning: unused parameter ‘left’ [-Wunused-parameter]
.def("__ne__", [](ydk::Empty& left, ydk::Empty& right)
^
/tmp/pip-install-5vc0wm56/ydk/python.cpp:545:57: warning: unused parameter ‘right’ [-Wunused-parameter]
.def("__ne__", [](ydk::Empty& left, ydk::Empty& right)
^
[100%] Linking CXX shared module ../lib.linux-x86_64-3.6/ydk_.so
/opt/rh/devtoolset-4/root/usr/libexec/gcc/x86_64-redhat-linux/5.3.1/ld: /usr/local/lib/libpython3.6m.a(abstract.o): relocation R_X86_64_32 against `.rodata.str1.8' can not be used when making a shared object; recompile with -fPIC
/usr/local/lib/libpython3.6m.a: error adding symbols: Bad value
16 REPLIES 16
Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

It looks like your system is incompatible with offered precompiled artifacts.

I suggest you to install core libraries by building from source. After successful installation repeat python core package installation with '-v' flag to get detailed log, which might expose source of possible issues.

Yan Gorelik
YDK Solutions
Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

Our django web application runs on python3.6.7 and works fine since we are using it for over 2-3 years now. I now installed ydk-gen from source . And also installed libydk and libydk_gnmi. However in my application I still get this error:

File "/home/sgang31/netadc3/ciscoaci/views/views_cutsheet.py", line 67, in <module>
    from ydk.services import CRUDService
ModuleNotFoundError: No module named 'ydk

I am not sure why while installing ydk through pip install ydk, it tries to use my global python install 
/usr/local/lib/libpython3.6

/opt/rh/devtoolset-4/root/usr/libexec/gcc/x86_64-redhat-linux/5.3.1/ld: /usr/local/lib/libpython3.6m.a(abstract.o): relocation R_X86_64_32 against `.rodata.str1.8' can not be used when making a shared object; recompile with -fPIC

My pip and python install are under a virtualenv :
(netadc_sgang31) [root@hqidlavxwa02 netadc3]# which pip
/root/.venvs3/netadc_sgang31/bin/pip

All other python packages installed fine for the past 2-3 years. Please help!

 

Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

Based on the error message the YDK python core package installation has failed. To be certain you need repeat its installation with '-v' flag. Most likely the system could not find your Python3.6 shared library, which is required for linking python with C++ core library. See Python Requirements for details. Make sure the LD_LIBRARY_PATH environment variable is set properly to include path to Python3.6 shared library, then repeat in your virtual environment:

    pip uninstall -y ydk
pip install -v ydk

Test installation in CLI:

    python -c "import ydk.services"

Post the installation console output, if it fails again after all requirements are satisfied.

Yan Gorelik
YDK Solutions
Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

I installed again with the "-v" flag. I set the LD_LIBRARY_PATH.

(netadc_sgang31) [root@hqidlavxwa02 netadc3]# printenv | grep LD_LIBRARY_PATH
LD_LIBRARY_PATH=/home/sgang31/netadc3/Python-3.6.3/libpython3.6m.a:/opt/rh/rh-mongodb32/root/usr/lib64

However I still get the error:

[100%] Linking CXX shared module ../lib.linux-x86_64-3.6/ydk_.so
  /opt/rh/devtoolset-4/root/usr/libexec/gcc/x86_64-redhat-linux/5.3.1/ld: /usr/local/lib/libpython3.6m.a(abstract.o): relocation R_X86_64_32 against `.rodata.str1.8' can not be used when making a shared object; recompile with -fPIC
  /usr/local/lib/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-install-h7qf7x2_/ydk/setup.py", line 145, in <module>
      zip_safe=False,
    File "/root/.venvs3/netadc_sgang31/lib/python3.6/site-packages/setuptools/__init__.py", line 145, in setup
      return distutils.core.setup(**attrs)
    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 "/root/.venvs3/netadc_sgang31/lib/python3.6/site-packages/wheel/bdist_wheel.py", line 192, 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-install-h7qf7x2_/ydk/setup.py", line 68, in run
      self.build_extension(ext)
    File "/tmp/pip-install-h7qf7x2_/ydk/setup.py", line 101, in build_extension
      subprocess.check_call([cmake_executable, '--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 '['cmake3', '--build', '.']' returned non-zero exit status 2.
error
  ERROR: Failed building wheel for ydk
  Running setup.py clean for ydk
  Running command /root/.venvs3/netadc_sgang31/bin/python3.6 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-h7qf7x2_/ydk/setup.py'"'"'; __file__='"'"'/tmp/pip-install-h7qf7x2_/ydk/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' clean --all
  running clean
  removing 'build/temp.linux-x86_64-3.6' (and everything under it)
  removing 'build/lib.linux-x86_64-3.6' (and everything under it)
  'build/bdist.linux-x86_64' does not exist -- can't clean it
  'build/scripts-3.6' does not exist -- can't clean it
  removing 'build'
Failed to build ydk
Installing collected packages: ydk
  Created temporary directory: /tmp/pip-record-g6cfex3z
    Running command /root/.venvs3/netadc_sgang31/bin/python3.6 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-h7qf7x2_/ydk/setup.py'"'"'; __file__='"'"'/tmp/pip-install-h7qf7x2_/ydk/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-g6cfex3z/install-record.txt --single-version-externally-managed --compile --install-headers /root/.venvs3/netadc_sgang31/include/site/python3.6/ydk

Also the python version that shows is the global python shared library:

 python version: 3.6m
  -- Found PythonLibs: /usr/local/lib/libpython3.6m.a (found version "3.6.7")
  pybind11 include: /root/.venvs3/netadc_sgang31/include/site/python3.6;/root/.venvs3/netadc_sgang31/include/site/python3.6
  -- Configuring done
  -- Generating done
  -- Build files have been written to: /tmp/pip-install-h7qf7x2_/ydk/build/temp.linux-x86_64-3.6

I even put that path /usr/local/lib/libpython3.6m.a in LD_LIBRARY_PATH, but I get the same error.

 

Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

The problem I see here is there is no shared library file libpython3.6m.so for python3.6. There is a libpython2.7m.so file for python2.7 and using pip2.7 it installs fine. Not sure why that file did not get installed as I made sure I had
--enable-shared
while installing python3.6
 

tar -xvf Python-3.6.7.tgz 
cd Python-3.6.7
./configure --enable-optimizations --prefix="custom_location" --with-ensurepip=install (use --enable-shared for shared python).
make -j 8
make altinstall
Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

ok i finally managed to resolve this! somehow the libpython shared library was installing in a weird path and it was not updated, so i had to run
updatedb
and then locate was locating the location of the shared library. Then I copied it to my global python installation folder!!
and then pip install ydk worked!!
Thanks for the support
Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

Please try your install again after reading this post from Python core developer Brett Cannon.

*Why you should use _'python -m pip'_

https://snarky.ca/why-you-should-use-python-m-pip/


Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

My pip install ydk succeeded, but now I am getting an error on the module NetConfProvider.
For cisco nxos switch:

RuntimeError: YClientError: Could not connect to x.x.x.x: Session status: Undefined

For arista 7010 switch:

RuntimeError: YIllegalStateError: Could not create repository in: /root/.ydk/x.x.x.x



People have suggested to downgrade libssh module and re-install libydk and core modules. is that the way to be followed?

Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

If you had successful YDK installation, the libssh is fine, no need to reinstall.
You clearly have connectivity issue. Make sure you can ssh to the device from CLI. The test will record SSH key on your system. Then check that you can connect to Netconf server, which must be configured on the device. The configuration is different and specific to the device. For Cisco routers and switches the testing command would be:    ssh @ -p -s netconf
Yan Gorelik
YDK Solutions
Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

My normal ssh access works :

(netadc_sgang31) [root@xxxx netadc3]# telnet x.x.x.x 22
Trying x.x.x.x... 
Connected to x.x.x.x.sdsd
Escape character is '^]'.
SSH-2.0-OpenSSH_7.2 FIPS

Now it works, I had to enable feature netconf on the cisco device.
When I try to issue the command for netconf that you gave:

(netadc_sgang31) [root@xxx ~]# ssh admin@x.x.x.x -p 22 -s netconf
User Access Verification
Password: 
<?xml version="1.0" encoding="ISO-8859-1"?>
<hello xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
  <capabilities>
    <capability>urn:ietf:params:xml:ns:netconf:base:1.0</capability>
    <capability>urn:ietf:params:netconf:base:1.0</capability>
    <capability>urn:ietf:params:netconf:capability:validate:1.0</capability>
    <capability>urn:ietf:params:netconf:capability:writable-running:1.0</capability>
    <capability>urn:ietf:params:netconf:capability:url:1.0?scheme=file</capability>
    <capability>urn:ietf:params:netconf:capability:rollback-on-error:1.0</capability>
    <capability>urn:ietf:params:netconf:capability:candidate:1.0</capability>
    <capability>urn:ietf:params:netconf:capability:confirmed-commit:1.0</capability>
  </capabilities>
  <session-id>xxxx</session-id>
</hello>
]]>]]>

But when using NetConfProvider YDK python module 
provider = NetconfServiceProvider(address="x.x.x.x",port=22,username="admin",password="xxxx", protocol="ssh")
getting error:

RuntimeError: YIllegalStateError: Could not create repository in: /root/.ydk/x.x.x.x

I changed the perms on /root/.ydk to 777 temporaraily, still it fails.

Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

I believe your 'port=22' is wrong, it is default port for SSH terminal session. But you need specify port for Netconf server.
Please check configuration of Netconf server on the device. If port is not configured, it is defaulted to 830.
Yan Gorelik
YDK Solutions
Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

Using port 830 works from the linux CLI

(netadc_sgang31) [root@xxxx netadc3]# ssh admin@x.x.x.x -p 830 -s netconf
User Access Verification
Password: 
<?xml version="1.0" encoding="UTF-8"?>
<hello xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
<capabilities>
<capability>urn:ietf:params:netconf:base:1.0</capability>
<capability>urn:ietf:params:netconf:base:1.1</capability>
<capability>urn:ietf:params:netconf:capability:writable-running:1.0</capability>
<capability>urn:ietf:params:netconf:capability:rollback-on-error:1.0</capability>
<capability>urn:ietf:params:netconf:capability:candidate:1.0</capability>
<capability>urn:ietf:params:netconf:capability:validate:1.1</capability>
<capability>urn:ietf:params:netconf:capability:confirmed-commit:1.1</capability>
<capability>http://cisco.com/ns/yang/cisco-nx-os-device?revision=2018-06-14&amp;module=Cisco-NX-OS-device&amp;deviations=Cisco-NX-OS-device-deviations</capability>
</capabilities>
<session-id>xxxx</session-id>
</hello>

But from python application using 

provider = NetconfServiceProvider(address="x.x.x.x",port=830,username="admin",password="xxxx", protocol="ssh")

I get error:

RuntimeError: YIllegalStateError: Could not create repository in: /root/.ydk/xxxx
Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

What is the permission on /root/.ydk directory?

Could you please enable DEBUG logging level in your script and attach its output to the post.

Yan Gorelik
YDK Solutions
Highlighted
Beginner

Re: Shared Libraries Error while installing ydk

Permissions are set to 777. Can we change the path to a more common location inside our project, other than root?

I enabled the debug INFo logs. The errors:-

Path where models are to be downloaded: /root/.ydk/x.x.x.x
Data is invalid according to the yang model. Libyang error: Loading "/usr/local/lib/libyang/nacm.so" as an extension plugin failed (/lib64/libc.so.6: version `GLIBC_2.14' not found (required by /usr/local/lib/libyang/nacm.so)).
Data is invalid according to the yang model. Libyang error: Loading "/usr/local/lib/libyang/metadata.so" as an extension plugin failed (/lib64/libc.so.6: version `GLIBC_2.14' not found (required by /usr/local/lib/libyang/metadata.so)).
Data is invalid according to the yang model. Libyang error: Invalid keyword "type" as a child to "annotation". Path: '/'
Data is invalid according to the yang model. Libyang error: Module "yang" parsing failed.
Could not create repository in: /root/.ydk/x.x.x.x

 I am basically trying to build a VLAN config using this cisco link:
https://community.cisco.com/t5/yang-development-kit-ydk/i-need-help-on-automating-openconfig-vlan-yang-module/td-p/3444515