How to create a docker image from running or existing docker container ….
Think that you have a running docker container and you have done some changes to it with bash into it or , you want to change published port of the running docker container ….
What you have to do is :
step 01 : stop your running container with (if it is already stopped continue)
docker container stop 'your_container_id/your_container_name ,
then when you list your all containers(running and stopped) with docker container ls -a then it should list there with it’s status is Exited.
docker commit 'stoped_container_id/name' 'new_image_name'
it will create a new image with the same configurations as your stopped container. now if you list down the images with docker image ls now you can see a new image in your docker image list.
step 03: then create your new container with
docker container run --name 'my_new_container' --publish aaaa:bbbb -d 'image_name_created_in_previous_step' .
this will create a new container for you.
