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

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.

Solution 1:

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 <container-name>

Solution 2:

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->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

Solution 3:

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

Solution 4:

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 <process id>