Docker - Bind for 0 0 0 0 4000 failed port is already allocated

Question

I am using docker for the first time and I was trying to implement this - https   docs docker com get-started part2  tag-the-image At one stage I was trying to connect with localhost by this command -   curl http   localhost 4000  which showed this error- curl   7  Failed to connect to localhost port 4000  Connection refused  However  I have solved this by following code -   docker-machine ip default   curl http   192 168 99 100 4000  After that everything was going fine  but in the last part  I was trying to run the app by using following line according to the tutorial      docker run -p 4000 80 anibar get-started part1  But  I got this error C  Program Files Docker Toolbox docker exe  Error response from daemon  driver failed programming external connectivity on endpoint goofy bohr  63f5691ef18ad6d6389ef52c56198389c7a627e5fa4a79133d6bbf13953a7c98   Bind for 0 0 0 0 4000 failed  port is already allocated

User · Answer

It might be a conflict with the same port specified in docker-compose.yml and docker-compose.override.yml or the same port specified explicitly and using an environment variable.

I had a docker-compose.yml with ports on a container specified using environment variables, and a docker-compose.override.yml with one of the same ports specified explicitly. Apparently docker tried to open both on the same container. docker container ls -a listed neither because the container could not start and list the ports.

User · Answer

I tried all the above answers  none of them worked  in my case even docker container ls doesn t show any container running  It looks like the problem is due to the fact that the docker proxy is still using ports although there are no containers running  In my case I was using ubuntu  Here s what I tried and got the problem solved  just run the following two commands  sudo service docker stop sudo rm -f  var lib docker network files local-kv db

User · Answer

Stopping the container didn t work for me either  I changed the port in docker-compose yml

User · Answer

Paying tribute to IgorBeaz  you need to stop running the current container   For that you are going to know current CONTAINER ID     docker container ls   You get something like   CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                  NAMES 12a32e8928ef        friendlyhello        python app py      51 seconds ago      Up 50 seconds       0 0 0 0 4000- gt 80 tcp   romantic tesla      Then you stop the container by     docker stop 12a32e8928ef   Finally you try to do what you wanted to do  for example     docker run -p 4000 80 friendlyhello

User · Answer

For anyone having this problem with docker-compose   When you have more than one project  i e  in different folders  with similar services you need to run docker-compose stop in each of your other projects

User · Answer

In my case  there was no process to kill  Updating docker fixed the problem

User · Answer

Above two answers are correct but didn t work for me     I kept on seeing blank like below for docker container ls then I tried  docker container ls -a and after that it showed all the process previously exited and running  Then docker stop  lt container id gt  or docker container stop  lt container id gt  didn t work  then I tried docker rm -f  lt container id gt  and it worked  Now at this I tried docker container ls -a and this process wasn t present

User · Answer

I ve had same problem with docker-compose    Killed docker-proxy processe   Restart docker Start docker-compose again

User · Answer

You need to make sure that the previous container you launched is killed  before launching a new one that uses the same port   docker container ls docker rm -f  lt container-name gt

User · Answer

docker ps will reveal the list of containers running on docker  Find the one running on your needed port and note down its PID  Stop and remove that container using following commands  docker stop PID docker rm PID  Now run docker-compose up and your services should run as you have freed the needed port

User · Answer

The quick fix is   a just restart docker   sudo service docker stop sudo service docker start

User · Answer

I solved it this way   First  I stopped all running containers   docker-compose down   Then I executed a lsof command to find the process using the port  for me it was port 9000   sudo lsof -i -P -n   grep 9000   Finally  I  killed  the process  in my case  it was a VSCode extension    kill -9  lt process id gt

[docker] Docker - Bind for 0.0.0.0:4000 failed: port is already allocated

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