docker error - name is already in use by container

Question

Running the docker registry with below command always throws an error   dev tmp me  docker run        -d --name registry-v1        -e SETTINGS FLAVOR local        -e STORAGE PATH  registry        -e SEARCH BACKEND sqlalchemy        -e LOGLEVEL DEBUG        -p 5000 5000        registry 0 9 1 Error response from daemon  Conflict  The name  registry-v1  is already in use by container f9e5798a82e0  You have to delete  or rename  that container to be able to reuse that name    How to prevent this error

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Here is how I solved this on ubuntu 18                   sudo docker ps -a copy the container ID   For each container do      sudo docker stop container ID   sudo docker rm container ID

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The Problem  you trying to create new container while in background container with same name is running and this situation causes conflicts  The error would be like   Cannot create continer for service X  Conflict  The name X is already in use by container abc123xyz  You have to remove ot delete  or rename  that container to be able to reuse that name   Solution rename the service name in docker-compose yml or delete the running container and rebuild it again  this solution related to Unix Linux macOS systems    get all running containers sudo docker ps -a get the specific container id stop and remove the duplicated container    force remove it  sudo docker stop  lt container id gt  sudo docker rm  lt container id gt   or sudo docker rm --force  lt container id gt

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You can remove it with command sudo docker rm YOUR CONTAINER ID  then run a new container with sudo docker run      or restart an existing container with sudo docker start YOUR CONTAINER ID

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I m just learning docker and this got me as well  I stopped the container with that name already and therefore I thought I could run a new container with that name   Not the case  Just because the container is stopped  doesn t mean it can t be started again  and it keeps all the same parameters that it was created with  including the name    when I ran docker ps -a that s when I saw all the dummy test containers I created while I was playing around   No problem  since I don t want those any more I just did docker rm containername at which point my new container was allowed to run with the old name   Ah  and now that I finish writing this answer  I see Slawosz s comment on Walt Howard s answer above suggesting the use of docker ps -a

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When you are building a new image you often want to run a new container each time and with the same name  I found the easiest way was to start the container with the --rm option   --rm        Automatically remove the container when it exits   e g   docker run --name my-micro-service --rm  lt image gt    Sadly it s used almost randomly in the examples from the docs

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I got confused by this also  There are two commands relevant here   docker run Run a command in a new container  docker start  Start one or more stopped containers

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I have solved the issue by doing following steps and I hope it helps     Type docker ps -a to list all the containers in your system   Check the NAMES part where you have initialized your docker container   Then type docker rm --force name of container  Install the docker container as you wish     I had problem using NIFI and I have removed and reinstalled using docker  Good luck

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Ok  so I didn t understand either  then I left my pc  went to do other things  and upon my return  it clicked  D  You download a docker image file  docker pull  image-name  will just pull the image from docker hub without running it   Now  you use docker run  and give it a name  e g  newWebServer   docker run -d -p 8080 8080 -v volume --name newWebServer image-name version   You perhaps only need docker run --name  name   image   but the other stuff will become useful quickly  -d  detached  - means the container will exit when the root process used to run the container exits  -p  port  - specify the container port and the host port  Kind of the internal and external port  The internal one being the port the container uses  and the external one is the port you use outside of it and probably the one you need to put in your web browser if that s how you access your app  --name  what you want to call this instance of the container  - you could have several instances of the same container all with different names  which is useful when you re trying to test something  image-name version is the actual image you want to create the container from  You can see a list of all the images on your system with docker images -a  You may have more than one version  so make sure you choose the correct one tag  -v  volume  - perhaps not needed initially  but soon you ll want to persist data after your container exits  OK  So now  docker run just created a container from your image  If it isn t running  you can now start it with it s name  docker start newWebServer  You can check all your containers  they may or may not be running  with docker ps -a  You can stop and start them  or pause them  with their name or the container id  or just the first few characters of it  from the CONTAINER ID column e g  docker stop newWebServer  docker start c3028a89462c  And list all your images  with docker images -a  In a nutshell  download an image  docker run creates a container from it  start it with docker start  name or container id   stop it with docker stop  name or container id

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The OP s problem is the error   Deleting state isn t the only solution - or even a good one   The problem is docker run isn t re-entrant  and docker start is impotent w o run   So we have to combine them  For example to run Postgres w o destroying previous state  try this  docker start postgres    docker run -d -p 5432 5432 --name postgres -e POSTGRES PASSWORD password postgres 13-alpine

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Just to explain what others are saying  it took me some time to understand  is that  simply put  when you see this error  it means you already have a container and what you have to do is run it  While intuitively docker run is supposed to run it  it doesn t  The command docker run is used to only START a container for the very first time  To run an existing container what you need is docker start  container-name  So much for asking developers to create meaningful intuitive commands

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You have 2 options to fix this      Remove previous container using that name  with the command docker rm   docker ps -aq --filter name myContainerName    OR Rename current container to a different name i e change this portion  --name registry-v1 to something like  --name myAnotherContainerName   You are getting this error because that container name   i e registry-v1  was used by another container in the past   even though that container may have exited i e  currently not in use

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I was running into this issue that when I run docker rm  which usually works  I would get   Error  No such image  The easiest solution to this is removing all stopped containers by running  docker container prune

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Simple Solution  Goto your docker folder in the system and delete  raw file or docker archive with large size

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TL DR  List all containers   docker ps -a  Remove the concerned container by id   docker container rm  lt container id gt

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That means you have already started a container in the past with the parameter docker run --name registry-v1      You need to delete that first before you can re-create a container with the same name with docker rm registry-v1  When that container is sill running you need to stop it first before you can delete it with docker stop registry-v1  Or simply choose a different name for the new container  To get a list of existing containers and their names simply invoke docker ps -a

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Here what i did  it works fine   step 1  it lists docker container with its name   docker ps -a   step 2   docker rm name of the docker container

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removing all the exited containers docker rm   docker ps -a -f status exited -q

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Cause  A container with the same name is still existing    Solution  To reuse the same container name  delete the existing container by   docker rm  lt container name gt    Explanation  Containers can exist in following states  during which the container name can t be used for another container    created restarting running paused exited dead   You can see containers in running state by using    docker ps   To show containers in all states and find out if a container name is taken  use   docker ps -a

[docker] docker error - 'name is already in use by container'

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