Eric Yang created HDDS-1609:
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Summary: Remove hard coded uid from Ozone docker image
Key: HDDS-1609
URL: https://issues.apache.org/jira/browse/HDDS-1609
Project: Hadoop Distributed Data Store
Issue Type: Bug
Reporter: Eric Yang
Hadoop-runner image is hard coded to [USER
hadoop|https://github.com/apache/hadoop/blob/docker-hadoop-runner-jdk11/Dockerfile#L45]
and user hadoop is hard coded to uid 1000. This arrangement complicates
development environment where host user is different uid from 1000. External
bind mount locations are written data as uid 1000. This can prevent
development environment from clean up test data.
Docker documentation stated that "The best way to prevent privilege-escalation
attacks from within a container is to configure your container’s applications
to run as unprivileged users." From Ozone architecture point of view, there is
no reason to run Ozone daemon to require privileged user or hard coded user.
h3. Solution 1
It would be best to support running docker container as host user to reduce
friction. User should be able to run:
{code}
docker run -u $(id -u):$(id -g) ...
{code}
or in docker-compose file:
{code}
user: "${UID}:${GID}"
{code}
By doing this, the user will be name less in docker container. Some commands
may warn that user does not have a name. This can be resolved by mounting
/etc/passwd or a file that looks like /etc/passwd that contain host user entry.
h3. Solution 2
Move the hard coded user to range between 199 and 500. The default linux
profile reserves service users between 199 and 500 to have umask that keep data
private to service user or group writable, if service shares group with other
service users. Register the service user with Linux vendors to ensure that
there is a reserved uid for Hadoop user. This is a longer route to pursuit,
and may not be fruitful.
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