linux - Docker RUN groupadd && useradd directives have no effect -

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i've built docker nginx 'base' image dockerfile fragment below:

from ubuntu:14.04 maintainer me <me.net> run apt-get update && apt-get install -y supervisor add supervisord.conf /etc/supervisor/conf.d/ run apt-get install -y nginx ..

this image linked database container , data volume. later, wanted add user container run applications user added 'run groupadd -r luqo33 && useradd -r -g luqo33 luqo33' directive dockerfile dockerfile this:

from ubuntu:14.04 maintainer me <me.net>  run groupadd -r luqo33 && useradd -r -g luqo33 luqo33  run apt-get update && apt-get install -y supervisor add supervisord.conf /etc/supervisor/conf.d/ run apt-get install -y nginx ..

then rebuit image docker build -rm ., , run whole stack again docker-compose up (i have stack configured in docker-compose.yml).

unfortunately, although run groupadd -r luqo33 && useradd -r -g luqo33 luqo33 step did not error out, when entered shell of running nginx container, luqo33 user or luqo33 group not there. executed same commands (groupadd -r luqo33 && useradd -r -g luqo33 luqo33) shell, , group , user added expected.

why wouldn't run groupadd -r luqo33 && useradd -r -g luqo33 luqo33 in dockerfile add user , group new container upon rebuilding? tried docker build --no-cache . same effect (or lack of it). missing here?

to make sure build command isn't making use of cached layer, use --no-cache option.

docker build --no-cache .

if want same docker-compose:

docker-compose build --no-cache

also since using docker-compose start container, make sure run docker-compose rm or else docker-compose reuse built images.


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