Interactive shell using Docker Compose

Question

Is there any way to start an interactive shell in a container using Docker Compose only  I ve tried something like this  in my docker-compose yml  myapp    image  alpine latest   entrypoint   bin sh  When I start this container using docker-compose up it s exited immediately  Are there any flags I can add to the entrypoint command  or as an additional option to myapp  to start an interactive shell  I know there are native docker command options to achieve this  just curious if it s possible using only Docker Compose  too

User · Answer

If the yml is called docker-compose yml it can be launched with a simple   docker-compose up  The corresponding attachment of a terminal can be simply  consider that the yml has specified a service called myservice      docker-compose exec myservice sh    However  if you are using a different yml file name  such as docker-compose-mycompose yml  it should be launched using   docker-compose -f docker-compose-mycompose yml up  To attach an interactive terminal you have to specify the yml file too  just like     docker-compose -f docker-compose-mycompose yml exec myservice sh

User · Answer

Using docker-compose  I found the easiest way to do this is to do a docker ps -a  after starting my containers with docker-compose up  and get the ID of the container I want to have an interactive shell in  let s call it xyz123      Then it s a simple matter to execute docker exec -ti xyz123  bin bash  and voila  an interactive shell

User · Answer

The canonical way to get an interactive shell with docker-compose is to use  docker-compose run --rm myapp  You can set stdin open  true  tty  true  however that won t actually give you a proper shell with up  because logs are being streamed from all the containers  You can also use docker exec -ti  lt container name gt   bin bash  to get a shell on a running container

User · Answer

This question is very interesting for me because I have problems  when I run container after execution finishes immediately exit and I fixed with -it   docker run -it -p 3000 3000 -v  app node modules -v   pwd   app  lt your container id gt    And when I must automate it with docker compose   version   3  services      frontend          stdin open  true         tty  true         build               context                dockerfile  Dockerfile dev         ports               -  3000 3000          volumes               -  app node modules             -    app   This makes the trick  stdin open  true  tty  true   This is a project generated with create-react-app  Dockerfile dev it looks this that   FROM node alpine  WORKDIR   app   COPY package json   RUN npm install  COPY       CMD   npm    run    start     Hope this example will help other to run a frontend react in example  into docker container

User · Answer

In the official getting started example  https   docs docker com compose gettingstarted   with the following docker-compose yml   version   3  services    web      build        ports       -  5000 5000    redis      image   redis alpine    After you start this with docker-compose up  you can easily shell into either your redis container or your web container with   docker-compose exec redis sh docker-compose exec web sh

User · Answer

If anyone from the future also wanders up here   docker-compose exec container name sh   or  docker-compose exec container name bash   or you can run single lines like  docker-compose exec container name php -v   That is after you already have your containers up and running

User · Answer

docker-compose run myapp sh should do the deal   There is some confusion with up run  but docker-compose run docs have great explanation  https   docs docker com compose reference run

User · Answer

You need to include the following lines in your docker-compose yml   version   3  services    app      image  app 1 2 3     stdin open  true   docker run -i     tty  true          docker run -t    The first corresponds to -i in docker run and the second to -t

User · Answer

You can do docker-compose exec SERVICE NAME sh on the command line  The SERVICE NAME is defined in your docker-compose yml  For example   services      zookeeper          image  wurstmeister zookeeper         ports            -  2181 2181    The SERVICE NAME would be  zookeeper

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