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Add a non root user to docker image in eclipse-temurin:17-focal

Hi i have created a spring boot application and want to add a non root user to in the docker file.

i was looking at the following https://spring.io/guides/topicals/spring-boot-docker/

and this command

RUN addgroup -S demo && adduser -S demo -G demo
USER demo

but this doesnt work in my docker file which is based on the followin image

FROM eclipse-temurin:17-focal
WORKDIR /app
COPY target/*.jar app.jar
EXPOSE 8080

RUN addgroup -S demo && adduser -S demo -G demo
USER demo

ENTRYPOINT ["java","-jar","/app.jar"]

Error:

error: failed to solve: process "/bin/sh -c addgroup -S app && adduser -S app -G app" did not complete successfully: exit code: 1
Solution

  • The image your are using inherits from an Ubuntu distribution, so you have use the right syntax for the failing commands.

    You should change:

    RUN addgroup -S demo && adduser -S demo -G demo

    Into:

    RUN addgroup demo 
RUN useradd -g demo demo