Demonstration of problem installing Scalyr Agent 2 on Amazon Linux 2

README.md

Demonstration of Problem Installing Scalyr Agent 2

Our most recently launched nodes' agents are crashing at startup with:

File "/usr/share/scalyr-agent-2/py/scalyr_agent/builtin_monitors/docker_monitor.py
class DockerClient(docker.APIClient): # pylint: disable=no-member
AttributeError: 'module' object has no attribute 'APIClient'

We can reproduce the AttributeError on the nodes with:

# python2
Python 2.7.16 (default, Dec 12 2019, 23:58:22) 
[GCC 7.3.1 20180712 (Red Hat 7.3.1-6)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import docker
>>> docker.APIClient
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'APIClient'

We can also reproduce the AttributeError with this Dockerfile, which installs Scalyr Agent 2 the way we installed it on the nodes and then runs the Python code above:

docker build -t scalyr-agent-2-test .
docker run --rm -ti scalyr-agent-2-test

Dockerfile

FROM amazonlinux:2
COPY scalyr.key /etc/pki/rpm-gpg/RPM-GPG-KEY-scalyr-1
COPY scalyr.repo /etc/yum.repos.d/
RUN yum install -y jq systemd-python python2-pip scalyr-agent-2
RUN pip2 install docker-py
CMD ["python2", "-c", "import docker; docker.APIClient"]

scalyr.key

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scalyr.repo

[scalyr]
includepkgs=scalyr-agent,scalyr-agent-2,scalyr-repo
name = Scalyr packages - noarch
baseurl = https://scalyr-repo.s3.amazonaws.com/stable/yum/binaries/noarch
mirror_expire = 300
metadata_expire = 300
enabled = 1
gpgcheck = 1
gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-scalyr-1