Ir al contenido principal

How to execute a command in running Docker container

Sometimes you need to run a particular command on a running container perhaps to check where some files are located or to see their contents, 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
      
    • You can execute a command in a running container with the following:
      docker exec -ti CONTAINER_ID COMAND_TO_RUN
      
      To run bash and do stuff inside the container:
      docker exec -ti CONTAINER_ID  /bin/bash
      
      To print the contents of a file, like the one with the initial password for the jenkins image (/var/jenkins_home/secrets/initialAdminPassword):
      docker exec -ti CONTAINER_ID  cat /var/jenkins_home/secrets/initialAdminPassword
      
      To list files and folders:
      docker exec -ti CONTAINER_ID  ls
      
  3. 3.

Comentarios

Entradas populares de este blog

Creating an AEM Application using Adobe's archetype version 23

In this tutorial, I will show how to use Adobe's archetype to create an AEM application using version 23rd and up, above is the vid and below you will find some useful notes. 1. Pre-reqs Have access to an Adobe Experience Manager instance. You will need aem 6.3 Service Pack 3, AEM 6.4 or AEM 6.5 2. Creating an AEM application using archetype version 23 Look for the .m2 folder inside your user for your particular Operating System

How to create an AEM component using Reactjs

In this tutorial, I will show how to use use Adobe's archetype to create an AEM application with React.js support and also how to add a new React.js component so that it can be added into a page, above is the vid and below you will find some useful notes. In the second part we will see how to configure the Sling Model for the AEM React component. 1. Pre-reqs Have access to an Adobe Experience Manager instance. You will need aem 6.4 Service Pack 2 or newer. 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.

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