12/28/2021

Running Containers With The Downloaded Images In Docker

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  • The -d option instructs Docker to run the container as a service in the background. Replace imagetagname with the name of the image downloaded in Step 1. In this example, we create a container named mysqldocker with the latest version tag: sudo docker run -name=containername -d mysql/mysql-server:latest.
  • You can use the -filter 'label=key =value ' option with the docker images and docker ps commands to list the images and running containers on which a metadata value has been set, for example: $ docker images -filter 'label=com.mydom.dept='DEVGROUP' $ docker ps -filter 'label=com.mydom.is-beta2' $ docker ps -filter 'label=env=Oracle.
  • Apr 11, 2017 You can use these images to spawn docker containers. (To use virtual machine terminology spawn in instance) Let me create an nginx container. sudo docker run -p 8080:80 nginx. The -p argument allows you to pass the local port 8080 and connect it to the port 80 in the container. In this case the nginx on the container listens on its port 80.

The docker run command serves for creating containers from images.

In this article i will show how to run a Docker image as a container on the example of the official latest base image of Ubuntu.

I will show how to install apache2 inside a container with Ubuntu and how to save this container as a new image.

And finally i will show how to run this new Docker image as a container in the both interactive and background modes.

Running the Apache Container using Docker Command. In the previous section, you downloaded the Docker image from the Docker hub. You’re now ready to create a container from that image. To run the Apache container, you will need to run the Docker command as follows: 1.

Cool Tip: Image vs. Container … What is the difference? Read More →

Run Docker Image as a Container

Do Not Confuse: Docker can’t run images themselves. The docker run command takes the Docker image as a template and produces a container from it.

Search Docker Hub for an image to download:

Pull the Docker image from a repository with the docker pull command:

Run the Docker image as a container:

When you execute docker run IMAGE, the Docker engine takes the IMAGE and creates a container from it by adding a top writable layer and initializing various settings (network ports, container name, ID and resource limits).

Install apache2 web-server inside the container and exit:

Create a new image from the stopped container inside which you have installed apache2 and name it apache_snapshot:

To view a list of all images on your Docker host, run:

Cool Tip: How do i list ( running stopped all ) Docker containers! Read More →

Docker

Now you can run the new Docker image as a container in interactive mode:

Or, for example, you can run the Docker image as a container in background with port :80 inside the Docker container forwarded to the port :8080 on the Docker host:

In this case, to check that apache2 inside the container is running, just visit http://localhost:8080/ and you will see “Apache2 Ubuntu Default Page”.

  • Docker Tutorial
  • Docker Useful Resources
  • Selected Reading

Containers are instances of Docker images that can be run using the Docker run command. The basic purpose of Docker is to run containers. Let’s discuss how to work with containers.

Running a Container

Running of containers is managed with the Docker run command. To run a container in an interactive mode, first launch the Docker container.

Then hit Crtl+p and you will return to your OS shell.

You will then be running in the instance of the CentOS system on the Ubuntu server.

Listing of Containers

One can list all of the containers on the machine via the docker ps command. This command is used to return the currently running containers.

Syntax

Options

None

Return Value

The output will show the currently running containers.

Example

Output

When we run the above command, it will produce the following result −

Let’s see some more variations of the docker ps command.

docker ps -a

This command is used to list all of the containers on the system

Syntax

Options

  • ─a − It tells the docker ps command to list all of the containers on the system.

Return Value

The output will show all containers.

Example

Output

When we run the above command, it will produce the following result −

docker history

With this command, you can see all the commands that were run with an image via a container.

Syntax

Options

How To Running Containers With The Downloaded Images

  • ImageID − This is the Image ID for which you want to see all the commands that were run against it.

Return Value

The output will show all the commands run against that image.

Example

The above command will show all the commands that were run against the centos image.

Output

Running Containers With The Downloaded Images In Docker Download

When we run the above command, it will produce the following result −


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