How can I install curl inside my container? - docker

Question

I have the following Dockerfile
FROM jupyter/scipy-notebook
#RUN apt-get update && apt-get install -y curl
RUN pip install mlflow
RUN pip install sklearn
RUN apt-get update && apt-get install -y curl
When I do
docker build -t mycontainer .
I get
Step 4/4 : RUN apt-get update && apt-get install -y curl
---> Running in 5defd9816a22
Reading package lists...
E: List directory /var/lib/apt/lists/partial is missing. - Acquire (13: Permission denied)
The command '/bin/bash -o pipefail -c apt-get update && apt-get install -y curl' returned a non-zero code: 100
I suspect it is something related with not running as a root?
So how can I install curl in my container from the Dockerfile?
EDIT: I applied the answer that I was given.
Unfortunately it did not work
Step 4/7 : USER root
---> Running in aa6a1b7a023f
Removing intermediate container aa6a1b7a023f
---> 59e87b9598b2
Step 5/7 : RUN apt-get update && apt-get install -y curl
---> Running in 4440ce61ebc6
Err:1 http://security.ubuntu.com/ubuntu focal-security InRelease
Temporary failure resolving 'security.ubuntu.com'
Err:2 http://archive.ubuntu.com/ubuntu focal InRelease
Temporary failure resolving 'archive.ubuntu.com'
Err:3 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Temporary failure resolving 'archive.ubuntu.com'
Err:4 http://archive.ubuntu.com/ubuntu focal-backports InRelease
Temporary failure resolving 'archive.ubuntu.com'
Reading package lists...
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal/InRelease Temporary failure resolving 'archive.ubuntu.com'
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal-updates/InRelease Temporary failure resolving 'archive.ubuntu.com'
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/focal-backports/InRelease Temporary failure resolving 'archive.ubuntu.com'
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/focal-security/InRelease Temporary failure resolving 'security.ubuntu.com'
W: Some index files failed to download. They have been ignored, or old ones used instead.
Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package curl
The command '/bin/bash -o pipefail -c apt-get update && apt-get install -y curl' returned a non-zero code: 100
EDIT2: I tried it in a different network setup and it worked.

Answer 1

You're seeing a "permission denied" error when apt attempts to create /var/lib/apt/lists/partial. This is because your process isn't running as root; the jupyter/scipy-notebook image is configured to run as non-root user (it runs as user jovyan).
You can change the user under which commands run in your Dockerfile with the USER directive, like this:
FROM jupyter/scipy-notebook
RUN pip install mlflow
RUN pip install sklearn
USER root
RUN apt-get update && apt-get install -y curl
USER jovyan
Note that I've made sure to reset the user back to jovyan after running the apt-get command.

Answer 2

Try to install it with root as it done in official jupyter/scipy-notebook Dockerfile and set it back to $NB_UID: (see user declaration in official base docker image)
USER root
# Install packages you need:
RUN apt-get update && apt-get install -y curl
# Switch back to jovyan to avoid accidental container runs as root
USER $NB_UID
Here is the hierarchy of base docker images used by jupyter/scipy-notebook:
jupyter/base-notebook -> jupyter/minimal-notebook -> jupyter/scipy-notebook