Return to Answer

The su-exec program in this script is actually the Alpine version created by Natanael Copa.

It is installed from the OP's Dockerfile on line 6.

The Alpine su-exec version is a substitute for gosu. Both programs are used to enable execution of a command as a specific user with the same environment variables and permissions as would normally be available to the user.

Thus you can effectively "step down" from root inside the container to run a specific command as a user and not as root.

So the alternative solution in Ubuntu would be to install gosu itself, which has no dependencies, and in the docker-entrypoint.sh script use:

gosu "$ZOO_USER" "$@"

(as per @alexey-shrub's comment below)

The su-exec program in this script is actually the Alpine version created by Natanael Copa.

It is installed from the OP's Dockerfile on line 6.

The Alpine su-exec program is a substitute for gosu. Both programs are used to enable execution of a command as a specific user with the same environment variables and permissions as would normally be available to the user.

Thus you can effectively "step down" from root inside the container to run a specific command as a user and not as root.

So the alternative solution in Ubuntu would be to install gosu itself, which has no dependencies, and in the docker-entrypoint.sh script use:

gosu "$ZOO_USER" "$@"

(as per @alexey-shrub's comment below)

The su-exec program in this script is actually the Alpine version created by Natanael Copa.

It is installed from the Dockerfile on line 6.

The Alpine su-exec version is a substitute for gosu. Both programs are used to enable execution of a command as a specific user with the same environment variables and permissions as would normally be available to the user.

Thus you can effectively "step down" from root inside the container to run a specific command as a user and not as root.

So, answering the question, the alternative solution in Ubuntu would be to install gosu itself, which has no dependencies.

The su-exec program in this script is actually the Alpine version created by Natanael Copa.

It is installed from the OP's Dockerfile on line 6.

The Alpine su-exec version is a substitute for gosu. Both programs are used to enable execution of a command as a specific user with the same environment variables and permissions as would normally be available to the user.

Thus you can effectively "step down" from root inside the container to run a specific command as a user and not as root.

So the alternative solution in Ubuntu would be to install gosu itself, which has no dependencies, and in the docker-entrypoint.sh script use:

gosu "$ZOO_USER" "$@"

(as per @alexey-shrub's comment below)

The su-exec program in this script is actually the Alpine version created by Natanael Copa: https://github.com/ncopa/su-exec

It is installed from the Dockerfile (https://github.com/31z4/zookeeper-docker/blob/d5d320f94212691bd6e60326e45c152ac6784210/3.4.10/Dockerfile) on line 6.

The Alpine su-exec version is a substitute for gosu (https://github.com/tianon/gosu). Both programs are used to enable execution of a command as a specific user with the same environment variables as would be available to the user.

Thus you can effectively "step down" from root inside the container to run a specific command as a user and not as root.

So, answering the question, the alternative solution in Ubuntu would be to install gosu itself, which has no dependencies.

The su-exec program in this script is actually the Alpine version created by Natanael Copa.

It is installed from the Dockerfile on line 6.

The Alpine su-exec version is a substitute for gosu. Both programs are used to enable execution of a command as a specific user with the same environment variables and permissions as would normally be available to the user.

Thus you can effectively "step down" from root inside the container to run a specific command as a user and not as root.

So, answering the question, the alternative solution in Ubuntu would be to install gosu itself, which has no dependencies.