Alternatively, you can actively enter container sessions by running docker run -it ubuntu bash command and execute the further apt-get install nginx command. In order to be able to still get the container’s id run docker ps -a | head -3 to output the most recent containers and identify the container based on the command issued to create the container and the exited status.ģ. In this case the docker ps command won’t show any output because no container is running. # docker imagesĬhances are that the installation process inside the container finishes fast which leads to a non-running container (container is stopped). In order to view if the new image has been successfully created just run docker images command and a listing of all saved images will be shown.
Here, 5976e4ae287c represents the container ID and ubuntu-nginx represents the name of the new image that has been saved with committed changes. # docker ps -lĪnd apply changes by running the below command: # docker commit 5976e4ae287c ubuntu-nginx Next, after Nginx package is installed, issue the command docker ps -l to get the ID or name of the running container. If you get error ‘ E: Unable to locate package nginx‘, then you need to connect to a container with interactive CLI and install nginx as shown. # docker run ubuntu bash -c "apt-get -y install nginx" But before committing any changes to a container, first start the container with the below commands which updates and installs Nginx daemon into Ubuntu image: # docker run ubuntu bash -c "apt-get -y update" In this example, we will run and save an Ubuntu-based Docker container where the Nginx server will be installed.
#DOCKER REMOVE CONTAINER ON EXIT HOW TO#
With docker -rm, the above-stopped container is removed when it exit.Ĭf381d99f454 debian "ls -la" About a minute ago Exited (0) About a minute ago crazy_swirlesĭ362659da5fc markdownhtml:1.1 "java -jar app.jar" 11 days ago Exited (255) 10 days ago 0.0.0.Following the previous Docker article, this tutorial will discuss how to save a Docker container into a new image, remove a container, and run an Nginx web server inside a container. We can delete the stopped container with a single command, but we have a better option -rm, it will remove the container when it exit.Ģ.5 Run the container from the Debian image again, and send an echo command and exit the container, this time with -rm option.Ģ.6 List the containers again this time, there is no new stopped container in the list. If we test a lot of containers and this will take up the disk space very fast. In the below example, the new stopped crazy_swirles container takes 10MB disk space.Ĭf381d99f454 debian "ls -la" About a minute ago Exited (0) About a minute ago crazy_swirles (NEW Container) dockerenvĭrwxr-xr-x 2 root root 4096 Mar 27 00:00 binĭrwxr-xr-x 2 root root 4096 Feb 1 17:09 bootĭrwxr-xr-x 5 root root 340 May 23 04:04 devĭrwxr-xr-x 1 root root 4096 May 23 04:04 etcĭrwxr-xr-x 2 root root 4096 Feb 1 17:09 homeĭrwxr-xr-x 7 root root 4096 Mar 27 00:00 libĭrwxr-xr-x 2 root root 4096 Mar 27 00:00 lib64ĭrwxr-xr-x 2 root root 4096 Mar 27 00:00 mediaĢ.4 List all the containers again, the stopped Debian container is listed here, and the stopped containers may take disk space. The container finished the command job and exit.ĭrwxr-xr-x 1 root root 4096 May 23 04:04.
In the below example, we have one stopped container.ĬONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESĭ362659da5fc markdownhtml:1.1 "java -jar app.jar" 11 days ago Exited (255) 10 days ago 0.0.0.0:80->8080/tcp xenodochial_volhardĢ.3 We start a container from the Debian image and run a ls -la command. Markdownhtml 1.1 18e69a3a2aae 12 days ago 144MBĭebian 0.1 ae0872208331 7 weeks ago 114MBĢ.2 List all containers, running, and stopped containers. 2.1 List all images, and then we use the Debian image to test the -rm option.īusybox latest 78096d0a5478 9 days ago 1.22MB
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