ec2_metadata package not installed automatically

[JeanFred]

Hello,

The aws-ec2-assign-elastic-ip package (installed via pip) got upgraded in our environment from 0.8.1 to 0.10.2. With that new version, the call to aws-ec2-assign-elastic-ip fails with

Traceback (most recent call last):
  File "/usr/bin/aws-ec2-assign-elastic-ip", line 26, in <module>
    import aws_ec2_assign_elastic_ip
  File "/usr/lib/python2.7/site-packages/aws_ec2_assign_elastic_ip/__init__.py", line 14, in <module>
    from ec2_metadata import ec2_metadata
ImportError: No module named ec2_metadata

Checking with pip freeze, and indeed the ec2_metadata package is not installed.

For now we solved by pinning to version 0.8.1.

Relevant packages installed (via pip freeze):

aws-ec2-assign-elastic-ip==0.10.2
boto3==1.12.36
botocore==1.15.36

$ aws --version
aws-cli/1.18.36 Python/2.7.5 Linux/5.6.2-1.el7.elrepo.x86_64 botocore/1.15.36

Hope this helps!

[sebdah]

Thanks for reporting this. I'm not able to replicate the issue. Below is an example where I created a virtualenv and ran pip install aws-ec2-assign-elastic-ip. I can then import the ec2_metadata package and also assign IPs.

If you could show me what the pip install output looks like, it'd be great. Might be that we could find some clues there.

Package list

(venv) sebdah@ip-10-10-92-207:~/test$ pip freeze
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
aws-ec2-assign-elastic-ip==0.10.2
boto3==1.12.39
botocore==1.15.39
cached-property==1.5.1
certifi==2020.4.5.1
chardet==3.0.4
docutils==0.15.2
ec2-metadata==1.8.0
futures==3.3.0
idna==2.9
jmespath==0.9.5
netaddr==0.7.19
python-dateutil==2.8.1
requests==2.23.0
s3transfer==0.3.3
six==1.14.0
urllib3==1.25.8

Importing ec2_metadata

(venv) sebdah@ip-10-10-92-207:~/test$ python
Python 2.7.15+ (default, Oct  7 2019, 17:39:04)
[GCC 7.4.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import ec2_metadata
>>> quit()

Running the application

(venv) sebdah@ip-10-10-92-207:~/test$ aws-ec2-assign-elastic-ip --dry-run
2020-04-10 04:40:17,712 - aws-ec2-assign-eip - INFO - Connected to AWS EC2 in eu-west-1
2020-04-10 04:40:17,909 - aws-ec2-assign-eip - INFO - Would assign IP 34.247.120.9

AWS CLI details

(venv) sebdah@ip-10-10-92-207:~/test$ aws --version
aws-cli/1.16.184 Python/2.7.15+ Linux/4.15.0-1041-aws botocore/1.12.174