CODEWITHSUNDEEP
linuxdockercgroups
Rodrigo
Rodrigo

Reputation: 391

cgcreate inside Docker container

I have the following Dockerfile

FROM python:3.12

RUN <<EOF
apt-get update
apt-get install -y cgroup-tools
EOF

WORKDIR /opt
COPY main.py main.py

CMD [ "python", "main.py" ]

Inside "main.py", I have this line

env_uuid = uuid.uuid4()
cgroup_name = f"exec_env_{env_uuid}"

subprocess.run(["cgcreate", "-g", f"memory:/{cgroup_name}"], check=True)

When I run it, with the command

docker buildx build --progress=plain --tag mytag . && docker run --privileged mytag

I get the error

cgcreate: can't create cgroup /exec_env_181a6832-1bba-4a3e-b3e8-2209cddd90ca: Device or resource busy

My question is: Is it possible to create cgroups within a Docker container? If so, what is needed?

Upvotes: 2

Views: 257

Answers (0)

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