Salvare un'immagine in un file

Dopo aver pubblicato la tua immagine nel registry dell'azienda, hai ricevuto molti commenti dai colleghi. Hai risolto i feedback più importanti e vuoi condividere la nuova Docker image, spam:v2, solo con alcuni colleghi prima di riproporla a tutta l'azienda. Salva la nuova Docker image in un file chiamato spam_updated.tar così potrai inviarla via email ai tuoi colleghi Alice e Bob.

Questo esercizio fa parte del corso

Introduzione a Docker

Visualizza il corso

Istruzioni dell'esercizio

Dal terminale, inserisci il comando per salvare spam:v2 in un file chiamato spam_updated.tar.

Esercizio pratico interattivo

Passa dalla teoria alla pratica con uno dei nostri esercizi interattivi

Inizia esercizio

Questo esercizio fa parte del corso

Introduzione a Docker

IntermediárioNível de habilidade

4.8+

2250 reviews

Inizia il corso gratis

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: Running Docker containers Exercise 2: Running your first container Exercise 3: Running a container in the background Exercise 4: An interactive container Exercise 5: Working with Docker containers Exercise 6: Helping a colleague Exercise 7: Cleaning up containers Exercise 8: Managing local docker images Exercise 9: Pulling your first image Exercise 10: Pulling a specific tag Exercise 11: Cleaning up images

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: Distribuire le immagini Docker Exercise 2: Condividere il tuo lavoro usando un registro Docker Exercise 3: Salvare un'immagine in un file

Esercizio in corso

Exercise 4: Ricevere immagini Docker Exercise 5: Creare le tue Docker image Exercise 6: Crea la tua prima image Exercise 7: Lavorare da riga di comando Exercise 8: Modificare un Dockerfile Exercise 9: Creare il tuo Dockerfile Exercise 10: Gestire i file nella tua immagine Exercise 11: Copiare file dentro un'immagine Exercise 12: Copiare cartelle Exercise 13: Lavorare con i file scaricati Exercise 14: Scegliere un comando di avvio per la tua immagine Docker Exercise 15: Sovrascrivere il comando predefinito Exercise 16: Scaricare un tag specifico Exercise 17: Aggiungere un 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