Ir al contenido principal

How to copy files from and to a running Docker container

Sometimes you want to copy files to or from a container that doesn’t have a volume previously created, in this quick tips episode, you will learn how. Above is the vid and below you will find some useful notes.
  1. 1.

    Pre-reqs

    • Have Docker installed
  2. 2.

    Start a Docker container

    • For this video I will be using a Jenkins image as an example, so let’s first download it by using docker pull
      docker pull jenkins/jenkins:lts
      
    • Then I will use one of the suggested ways to run the instance and do it in the background. If you don't use pull first this command will work given that it will also try to download the image if it's not found locally.
      docker run -d -p 8080:8080 -p 50000:50000 jenkins/jenkins:lts
      
    • You can check what's the container id, you can just type docker ps for this
      docker ps
      
    • for copying something into a docker container we just need to specify which local file or folder to copy, then the container id followed by a colon and the target folder inside the container You can execute a command in a running container with the following:
      docker cp LOCAL_FILE_OR_FOLDER CONTAINER_ID:TARGET_FOLDER_INSIDE_CONTAINER
      
      If you want to copy the local "./upload/test.txt" file into the "/var/jenkins_home/secrets" folder inside the container, do the following:
      docker cp ./upload/test.txt CONTAINER_ID:/var/jenkins_home/secrets
      
    • Finally, for copying something from a container into your local file system, you just need to specify the container id, a colon, the source file or folder inside the container and then the target local folder where the files or folders will be placed
      docker cp CONTAINER_ID:SOURCE_FOLDER_INSIDE_CONTAINER LOCAL_FOLDER
      
      If you want to copy the local "/var/jenkins_home/secrets/initialAdminPassword" file, that is currently inside the container, into your local ".\download\" folder, do the following:
      docker cp CONTAINER_ID:/var/jenkins_home/secrets/initialAdminPassword .\download\
      
  3. 3.

Comentarios

Entradas populares de este blog

Create a custom AEM workflow process step with a dialog

In this tutorial I talk about how to create a custom workflow step process with an additional dialog for configuring it, above is the vid and below you will find some useful notes. 1. Pre-reqs Have access to an Adobe Experience Manager instance. Have Maven installed, understand how it works and also understand how to use Adobe's archetype, you can watch my video about maven here: Creating an AEM application using Maven and Adobe's archetype 2. What is an AEM Workflow and workflow model Workflows allow you to automate different tasks inside AEM by defining a s

Creating Docker containers for Adobe Experience Manager

This is a Docker tutorial for creating a docker image for the Galen framework, above is the vid and below you will find some of the steps followed. Adobe experience manager is a content management system which in a nutshell is an application that allows us to create web sites to be consumed by end users. You might be familiar with other such applications like wordpress or drupal which serves the same purpose A typical deployment would be comprised of two AEM instances, the author instance used for creating and modifying content, the publish instance which serves the content and finally we have a dispatcher which is a static web server used for caching, load balancing and some security purposes. We can configure an AEM instance to work as an author or publish instance by either changing the file name

Creating a Mongo replicaset using docker: Mongo replicaset + Nodejs + Docker Compose

This is a Docker tutorial for creating a Mongo replica set using docker compose and also a couple more containers to experiment with the replica set, above is the vid and below you will find some of the steps followed. Steps Pre-reqs Have node.js installed And docker installed (make sure you have docker-compose as well) Create a container for defining configurations for a mongo instance Create a container for setting up the replica set Create a simple node app using expressjs and mongoose (A modified version from the previous video ) Create a docker-compose file with the mongo and setup containers and two additional containers for experimenting with the replica set Build, Run and experiment with your new containers Create a dockerfile for the first mongo container (not really needed but you could configure more stuff if needed) Include container with mongo preinstalled:  FROM mongo Create default/working directory:  WORKDIR /usr/src/configs Copy mongo