![]() If you want to list only the latest created Docker containers, you can use the docker ps -n command. The output shows information about all the Docker containers, both running and stopped, and includes the same information as the docker container ls command, such as container ID, image, command, creation time, status, ports, and names. This command lists all the containers, both running and stopped. To list all the Docker containers on a system, you can use the docker ps -a command. We can see their container IDs, the images they are based on, the commands used to start them, the status, and the ports they are using. In the example output, we can see that there are two running Docker containers, an Nginx web server and a MySQL database server. PORTS: The ports that are exposed by the container.STATUS: The current status of the container.CREATED: The date and time when the container was created.COMMAND: The command that is executed when the container is started.IMAGE: The name of the Docker image used to create the container. ![]() CONTAINER ID: The unique identifier for the container.The output shows the following information about the running Docker containers: Here’s an example output of the docker container ls command: You can also use various flags and options with this command to filter and format the output. It is a shorter version of the docker ps command and provides a concise output that includes information about the container ID, image, command, status, and creation time. The docker container ls command is used to list the running Docker containers. These commands are essential for managing Docker containers, and you can use them in various use cases, such as monitoring and troubleshooting Docker containers, identifying container ID or names, or filtering the containers based on specific criteria. Shows real-time usage statistics of all the running Docker containers. Shows detailed information about a specific Docker container. Lists only the IDs of running Docker containers.Īllows you to filter Docker containers based on various criteria.Īllows you to specify the output format of the listed Docker containers. Lists all the Docker containers, both running and stopped. Let’s start with the most important thing, the actual commands. ![]() In this article, we will explore the various Docker commands that are used to list containers, their use cases, best practices, and limitations. Docker provides several commands to list containers, both running and stopped, and filter and format the output. 3.6.One of the essential tasks when working with Docker containers is listing them. Once it's done, we can unpause the execution of the first container. In such cases, we can pause one of the containers with low priority for some time and let the other container use the complete CPU. Of course, we can run both containers simultaneously, but it will slow down the execution due to a lack of resources. At the same time, we wish to run another CPU-intensive container with high priority. Now the question is when to pause a Docker container? Consider a situation when a Docker container is performing some CPU-intensive task. Therefore, the container will stop after 900 seconds of sleep from this point. So when we unpause the container, it will resume its sleep from 100. In our example above, we paused the container after 100 seconds of sleep. On unpausing the container, it will resume from the same point where we paused it. We can use the docker unpause command to resume the container: $ docker unpause mycontainer Notice that the CPU is 0%, but the memory usage is not zero. Let's verify this using the docker stat command: $ docker stats -no-streamĬONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDSġa44702cea17 mycontainer 0.00% 1.09MiB / 7.281GiB 0.01% 1.37kB / 0B 0B / 0B 1 We can verify the same by running the following command after 10 seconds: $ docker inspect -f '' mycontainerĪ paused container consumes the same memory used while running the container, but the CPU is released completely. This will exit the container after 10 seconds of sleep. Here, we have started a centos container, mycontainer, and passed the command sleep 10.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |