Un container interattivo

È saltato fuori un altro bug nella pipeline di ingestion dei dati; questa volta, però, hai qualche indizio su dove potrebbe essere il problema. I tuoi colleghi ti dicono che l'applicazione non riesce ad avviarsi all'interno del suo container Ubuntu. Per fare debug vuoi avviare un container Ubuntu e provare a eseguire tu stesso l'applicazione per capire cosa non va.

Seleziona la combinazione giusta di comandi per:

Avviare un container ubuntu e ottenere una shell interattiva all'interno del container.
Chiudere il container per tornare all'host dopo che hai ottenuto una shell interattiva nel container e individuato il problema nella pipeline.

Puoi usare la shell per provare i possibili comandi.

Questo esercizio fa parte del corso

Introduzione a Docker

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Questo esercizio fa parte del corso

Introduzione a Docker

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You'll go from starting and stopping your first container to seeing how to clean your environment by removing all containers and images. You'll see how to debug issues by running commands inside a container or executing bash commands in a container interactively. All of this is done using the Docker Command Line Interface.

Exercise 1: Esecuzione di container Docker Exercise 2: Esegui il tuo primo container Exercise 3: Eseguire un container in background Exercise 4: Un container interattivo

Esercizio in corso

Exercise 5: Lavorare con i container Docker Exercise 6: Dare una mano a un collega Exercise 7: Pulire i container Exercise 8: Gestire le immagini Docker locali Exercise 9: Fai il pull della tua prima immagine Exercise 10: Scaricare un tag specifico Exercise 11: Pulizia delle immagini

Once you are able to manage images and containers, it's time to know how to share images with colleagues or your entire company and to understand how to create your own. Now, you'll build your own images using Dockerfiles. Dockerfiles are text files that include everything needed for Docker to build an image. You'll learn how to create images and will get an introduction to all the essential Dockerfile instructions like FROM, RUN, COPY, and more. By the end of this chapter, you'll have insight into how Docker makes images and be able to create optimized Docker images from scratch.

Exercise 1: Distributing Docker Images Exercise 2: Sharing your work using a Docker registry Exercise 3: Saving an image to a file Exercise 4: Receiving Docker Images Exercise 5: Creating your own Docker images Exercise 6: Building your first image Exercise 7: Working in the command-line Exercise 8: Editing a Dockerfile Exercise 9: Creating your own Dockerfile Exercise 10: Managing files in your image Exercise 11: Copying files into an image Exercise 12: Copying folders Exercise 13: Working with downloaded files Exercise 14: Choosing a start command for your Docker image Exercise 15: Overriding the default command Exercise 16: Pulling a specific tag Exercise 17: Adding a CMD

In this final chapter, you’ll focus on making your Dockerfiles configurable and secure. You'll learn how to make your Dockerfiles configurable using the ARG and ENV instructions. You’ll see why changing the user in your images makes them more secure and how to use the USER Dockerfile instruction to do so. To wrap things up, you’ll learn about some essential security best practices when creating Docker Images.

Exercise 1: Introduction to Docker caching Exercise 2: Docker caching Exercise 3: Ordering Dockerfile instructions Exercise 4: Changing users and working directory Exercise 5: WORKDIR and USER Exercise 6: Setting the user Exercise 7: Setting the working directory Exercise 8: Variables in Dockerfiles Exercise 9: Understanding ARG and ENV Exercise 10: Overriding ARG in a build Exercise 11: Changing behavior when starting a container Exercise 12: Creating Secure Docker Images Exercise 13: Security best practices Exercise 14: Keeping packages up-to-date Exercise 15: Be safe, don't use root