How to install new packages into non-root Docker Container?
I'm trying to extend a docker container for SOLR. I just want to install vim into it. But when I run the docker build it complains that I'm not root.
This is the DockerFile that I'm extending: https://github.com/makuk66/docker-solr/blob/master/5.3/Dockerfile
And my build file is this:
FROM makuk66/docker-solr
MAINTAINER OCSCommerce Team <[email protected]>
RUN apt-get update
RUN apt-get --assume-yes install vim
COPY home/ocscommerce /etc/solr/home
Then it outputs this:
192.168.99.100
localhost:solr$ docker build -t ocscommerce/solr .
Sending build context to Docker daemon 39.66 MB
Step 0 : FROM makuk66/docker-solr
---> 92be2fe79f15
Step 1 : MAINTAINER OCSCommerce Team <[email protected]>
---> Using cache
---> a3ac70e40324
Step 2 : RUN apt-get update
---> Running in c865716a2694
E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied)
E: Unable to lock directory /var/lib/apt/lists/
E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?
Is there any way to install a package into this container? Or would I need to copy the original build file from makuk66?
Answer
Switch to the root user, then switch back to the original solr user:
USER root
install/updates
USER solr