Use Docker Stop Containers Without Screwing Things Up!

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Containers are the hottest trend in technology right now, but they can also be extremely confusing. With a little help from our friends at Docker, we’ll learn how to use them without screwing things up!

The “docker stop all containers” command is a way to stop all of the running Docker containers. This can be helpful if you need to restart your machine or if you have messed up things and want to start over.

Use Docker Stop Containers Without Screwing Things Up!

Having issues stopping Docker containers? With the flexibility to build a variety of containers, determining the best technique to stop one is tough. In this post, you’ll learn how to stop a container or all containers using Docker commands.

Continue reading to find out more!

Prerequisites

Make sure you have the following items to follow along with this tutorial:

  • Microsoft Windows 10 – The tutorial runs Docker on Windows, but the same fundamental techniques may be applied to Linux or macOS.
  • Docker Desktop 3.5.2 is used in this tutorial. If you’re using Linux, you may use the Docker engine instead of the GUI.
  • A Docker container or containers in use.

Installation and Use of Docker on Ubuntu (In the Real World)

Containers are ending with a docker stop. Command of Containers

Let’s start with the first command, the docker halt containers command, and how it works.

For example, suppose you need to terminate a container named mystifying hofstadter with the ID fb66ed502096. Stop the container using the docker stop command, as shown in the example below.

# Use the command docker stop mystifying hofstadter to stop the container. # docker stop (same container) # stop the container through the ID fb66ed50209

Using the container name or container ID to stop a single Docker container.Using the container name or container ID to stop a single Docker container.

What if you have numerous containers operating and want to stop them all? The docker stop command allows you to stop several container IDs at once.

First, list all containers via the [docker ps](<https://docs.docker.com/engine/reference/commandline/ps/>)command and pass the container IDs to the docker stop, as shown below.

# docker list all running containers ps # Use the container ID docker stop to stop the following Docker containers. 31269ef5999e a427a21c5558 e9dbd816f24c a427a21c5558

Listing and then halting all running containers Listing and then halting all running containers

What if you want to terminate all operating containers without explicitly getting and supplying the container IDs to docker stop? This may be done using the docker ps -q command. The -q argument of the docker ps command only returns the container IDs.

# Make three different containers. Each command is separated by a semicolon. docker run -d -t ubuntu; docker run -d -t ubuntu; docker run -d -t ubuntu; docker run -d -t ubuntu; docker run – # List all currently active containers. ps -q docker # Get a list of all running container IDs and provide them to docker stop. $$$$$$ (docker ps -q)

Multiple Docker containers may be stopped at once. Multiple Docker containers may be stopped at once.

In both Bash on Linux and PowerShell on Windows, the $(docker ps -q) construct is a sub-expression. A sub-expression tells the shell to run one set of instructions first, such as docker ps -q, and then return the results to the main command, docker stop.

The SIGTERM signal is used by the docker stop command. Linux signals alert a process to an occurrence, but the process must determine how to respond to the signal.

Docker employs the SIGTERM signal to gently halt a process by waiting for a default of 10 seconds before issuing the SIGKILL signal, which instantly terminates the process.

Using Process Signals to Stop a Container

When ending a container, you learnt about Docker’s default behavior (stop signal). However, the default action may not be what you desire. Alternatively, you may tell Docker to utilize different stop signals.

You may define the stop signal when launching the container using the —stop-signal parameter of the docker run command. This flag specifies the signal to be given to the operating container when it is time to quit.

How to Run Startup Commands in Docker Containers (Related)

The —stop-signal option is set to SIGQUIT in the example below, instructing Docker to send the SIGQUIT signal when it’s time to terminate the container. The following parameters are also used in the example:

  • d – Detaches and runs the container in the background. Because the process is operating in the background, the user will not be able to interact with the container immediately in detached mode.
  • t – creates a Pseudo-TTY (PTY) console in the container, which simulates a genuine terminal console and prevents the Ubuntu container from quitting immediately. In the example, a PTY terminal is required to keep the Ubuntu container running in the background.
  • “image name” – The name of the Docker image to use to provide the container, in this example, ubuntu.

—stop-signal docker run -d ubuntu SIGQUIT

When launching and closing a Docker container, provide SIGQUIT as the signal. When launching and closing a Docker container, provide SIGQUIT as the signal.

A Dockerfile, which informs Docker how to construct a container, may also provide the stop signal. STOPSIGNAL SIGQUIT, for example, may be added to the Dockerfile to indicate the stop signal. You may replace the SIGQUIT with any other stop signal you like.

Containers Leaving Kill the docker right away.

There can be occasions when you wish to leave containers without giving them a chance to rest. The docker kill command terminates a container instantly.

The container ID 2aa318273db5 is sent to docker kill in the example below. The SIGKILL signal will cause the container to quit instantly. There will be no graceful departure for the container. The container will quit as a consequence of the command, and the container’s ID will be shown.

With the command docker kill $, Docker will terminate all containers (docker ps -q). (docker ps -q) is a sub-expression in this case.

Using Docker RM to Stop and Remove a Container

When you build a container, it is created in the same way it was before: it is idempotent. Because removing a container will have little effect, docker rm may force-stop and delete a container. Docker sends a SIGKILL signal to the main process and removes the container from your Docker installation’s list of accessible containers.

If the container’s internal files have changed or its state has altered, deleting the container will wipe out those modifications. Be wary of possible blunders!

Perhaps you launched a container with the name kind galileo in the following example. A container must be stopped before it may be removed, as demonstrated below. For the sample container, the docker ps -a command returns the status Exited.

Lists all containers, including those that have been halted. Lists all containers, including those that have been halted.

The docker rm command will completely delete the container now that it has been halted.

Instead of halting the container and then removing it, the —force and docker rm command will stop and remove the container in one step. The laughing elion container will no longer be accessible for use.

—force laughing elion docker rm

The error message will appear if you do not supply the —force command. Daemon’s error response: A running container cannot be removed…

A container is stopped and removed. A container is stopped and removed.

Docker Compose for Stopping Docker Containers

Although Docker commands are normally used on a single container, you may establish a service using many containers that operate together. You may use the Docker Compose tool to set up a service made up of many containers to operate together.

Because the containers in a service are meant to function together, it’s ideal to gracefully terminate the whole service rather than any one container.

[docker-compose stop] ends a service that is running with multiple containers without deleting the containers or the service. Create a Docker Compose service, start it, and then gracefully end it by following the steps below.

1. Make a directory in which to save your configuration file. The file will be stored in the directory C:ArticlesUbuntu in this example.

2. Create the docker-compose.yml file, which should include the following settings. The Docker Compose file below builds a service with two Ubuntu containers that do not terminate immediately when started.

# The docker-compose specification version is “3.9.” # This service is made up of the following applications: # Image for the First Ubuntu Container container1: ubuntu # Same as the -t option, but allocates a Psuedo-TTY instead of exiting the container immediately. tty: yes # Image for the Second Ubuntu Container container2: ubuntu tty: yes

3. Open a terminal window and browse to your own Docker configuration file directory, which is C:ArticlesUbuntu in our case. Run docker-compose up -d to construct and start the service you built earlier in the background, as indicated by the -d option.

A Docker Compose service is being started. A Docker Compose service is being started.

4. Issue the command docker-compose stop in the same terminal session and directory to gracefully terminate the service and containers.

A Docker Compose service is being stopped. A Docker Compose service is being stopped.

The rm —force and kill arguments are likewise available in the docker-compose command, as they are in the docker command. Instead of a single container, the docker-compose parameters operate on the service. The -s option of the docker-compose kill command is used to provide the stop signal.

Conclusion

Docker containers are a useful tool for creating separate development and production environments. You learnt about numerous methods Docker may halt one or more, or even all, containers in this post. You also learnt how to alter the default stop signal used by Docker.

With this understanding, you now understand how to stop Docker containers and how to avoid making mistakes when it’s time to do so. With this newfound information, how do you intend to halt your containers from now on?

The “docker stop list of containers” is a command that allows users to stop all running docker containers. However, this can sometimes cause unexpected results. The “docker start list of containers” command can be used to start them back up again.

Related Tags

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  • docker stop $(docker ps)