Working with Docker in Visual Studio Code

Working with Docker in Visual Studio Code

Working with Docker. Whether you are a seasoned Docker developer or just getting started, Visual Studio Code makes it easy to author Dockerfile and docker-compose.yml files in your workspace. Visual Studio Code even supports generating and adding the appropriate Docker files based on your project type. Docker is a very popular container platform that lets you easily package, deploy, and consume applications and services.

Working with Docker

Docker is a very popular container platform that lets you easily package, deploy, and consume applications and services. Whether you are a seasoned Docker developer or just getting started, Visual Studio Code makes it easy to author Dockerfile and docker-compose.yml files in your workspace.

Install the Docker extension

Docker support for VS Code is provided by an extension. To install the Docker extension, open the Extensions view by pressing ⇧⌘X (Windows, Linux Ctrl+Shift+X) and search for docker to filter the results. Select the Microsoft Docker extension.

Dockerfiles

With Docker, you can build images by specifying the step by step commands needed to build the image in a Dockerfile. A Dockerfile is just a text file that contains the build instructions.

VS Code understands the structure of Dockerfiles as well as the available set of instructions, so you get a great experience when authoring these files.

  1. Create a new file in your workspace named Dockerfile
  2. Press ⌃Space (Windows, Linux Ctrl+Space) to bring up a list of snippets corresponding to valid Dockerfile commands. Pressing the 'i' Read More button on the right will show a fly-out with details and a link to the Docker Online documentation.

  1. Press Tab to move between fields within the snippet. For example, with the COPY snippet you can fill in the source and then press Tab to move to the dest field.

In addition to snippets for authoring your Dockerfile, Visual Studio Code will provide you with a description of any Docker command you hover over with the mouse. For example, when hovering over WORKDIR you will see the following.

For more information on Dockerfiles, check out Dockerfile best practices on docker.com.

Docker Compose

Docker Compose lets you define and run multi-container applications with Docker. You can define what shape these containers look like with a file called docker-compose.yml.

Visual Studio Code's experience for authoring docker-compose.yml is also very rich, providing IntelliSense for valid Docker compose directives and it will query Docker Hub for metadata on public Docker images.

  1. Create a new file in your workspace called docker-compose.yml
  2. Define a new service called web:
  3. On the second line, bring up IntelliSense by pressing ⌃Space (Windows, Linux Ctrl+Space) to see a list of all valid compose directives.

  1. For the image directive, you can press ⌃Space (Windows, Linux Ctrl+Space) again and VS Code will query the Docker Hub index for public images.

VS Code will first show a list of popular images along with metadata such as the number of stars and description. If you continue typing, VS Code will query the Docker Hub index for matching images, including searching public profiles. For example, searching for Microsoft will show you all the public Microsoft images.

Generating Docker files

Writing Docker and docker-compose files by hand can be tricky and time consuming. To help you, VS Code can generate the necessary Docker files for your project. From the Command Palette (⇧⌘P (Windows, Linux Ctrl+Shift+P)), run the Docker: Add Docker files to Workspace command to generate Dockerfile, docker-compose.yml, and docker-compose.debug.yml files for your workspace type:

Docker commands

Many of the most common Docker and docker-compose commands are built right into the Command Palette (⇧⌘P (Windows, Linux Ctrl+Shift+P)).

Docker view

The Docker extension contributes a Docker view to VS Code. Within the view, the Explorer lets you view and manage your Images, Containers, and browse your Docker Hub registry. If the Azure Account extension is installed, you can browse your Azure Container Registries as well.

The right click context menu provides quick access to the same rich set of commands found in the Command Palette (⇧⌘P (Windows, Linux Ctrl+Shift+P)).

You can move the Docker view up or down by dragging the Docker icon and you can hide the view by right clicking on the icon and choosing Hide. To bring it back, right click on the Activity Bar area and check the Docker item.

Signing in to Docker Hub

The first time you expand the Docker Hub node, you'll be prompted to sign in to your Docker Hub account.

Your user name and password are stored in your operating system credentials vault (for example macOS keychain, Windows Credential Store) so that you don't need to sign in every time. You can log out of Docker Hub by right clicking on the Docker Hub label and choosing Docker Hub Logout. This will delete the credentials from the OS store.

Configuration settings

The Docker extension comes with a number of useful configuration settings allowing you to customize your workflow. You can control such things the default tag for an image (docker.defaultRegistry), the shell to use when attaching to a Docker container (docker.attachShellCommand), or various docker-compose settings.

Bring up the Settings editor (⌘, (Windows, Linux Ctrl+,)) and type 'docker' in the search box to filter on the docker extension settings.

Linting

The Docker extension language service analyzes your Docker files and provides you with errors and warnings.

You can control specific linting rules to either be a warning, error, or ignored through the docker.languageserver.diagnostics settings

Deploying images to Azure App Service

With the Docker Explorer, you can deploy images from Docker Hub or Azure Container Registries, directly to an Azure App Service instance. This functionality requires installing the Azure Account extension and an Azure Subscription. If you do not have an Azure subscription, sign up today for a free 30 day account and get $200 in Azure Credits to try out any combination of Azure services.

To sign in to Azure, use the Azure: Sign In command from the Command Palette (⇧⌘P (Windows, Linux Ctrl+Shift+P)). You will then sign in to your account using the Device Login flow. Click on Copy & Open to open your default browser.

Paste in the access code and continue the sign in process.

You can now right click on an image in Docker Hub or an Azure Container Registry and choose Deploy Image to Azure App Service.

From here, you will be prompted for an Azure Resource Group, a location, an App Service Plan, and a globally unique website name.

To see the full workflow, there is a detailed Deploy using Docker tutorial that creates a web application, puts it into a Docker container, pushes it to an Azure Container Registry, and then deploys to Azure.

Connecting to docker-machine

The default connection of the extension is to connect to the local docker daemon. You can connect to a docker-machine instance if you launch VS Code and have the DOCKER_HOST environment variable set to a valid host.

Running commands on Linux

By default, Docker runs as the root user on Linux, requiring other users to access it with sudo. This extension does not assume root access, so you will need to create a Unix group called "docker" and add users to it. Instructions can be found here: Create a Docker group.

WordPress in Docker. Part 1: Dockerization

WordPress in Docker. Part 1: Dockerization

This entry-level guide will tell you why and how to Dockerize your WordPress projects.

This entry-level guide will tell you why and how to Dockerize your WordPress projects.

List all containers in Docker(Docker command)

List all containers in Docker(Docker command)

We can get a list of all containers in docker using `docker container list` or `docker ps` commands.

We can get a list of all containers in docker using docker container list or docker ps commands.

List Docker Containers

To list down docker containers we can use below two commands

  • docker container list
  • docker ps

docker container ls command introduced in docker 1.13 version. In older versions we have to use docker ps command.

List all Containers in docker, using docker ls command

The below command returns a list of all containers in docker.

docker container list -all

or

docker container ls -all

List all containers in docker, using docker ps command

In older version of docker we can use docker ps command to list all containers in docker.

$ docker ps -all

or

$ docker ps -a

List all Running docker containers

The default docker container ls command shows all running docker containers.

$ docker container list

or

$ docker container ls

or

To get list of all running docker containers use the below command

$ docker ps

List all stopped docker containers command

To get list of all stopped containers in docker use the below commands

$ docker container list -f "status=exited"

or

$ docker container ls -f "status=exited"

or you can use docker ps command

$ docker ps -f "status=exited"

List all latest created docker containers

To list out all latest created containers in docker use the below command.

$ docker container list --latest

Show n last created docker containers

To display n last created containers in docker use the below command.

$ docker container list --last=n

What is Docker | Docker Tutorial for Beginners

What is Docker | Docker Tutorial for Beginners

This DevOps Docker Tutorial on what is docker will help you understand how to use Docker Hub, Docker Images, Docker Container & Docker Compose. This tutorial explains Docker's working Architecture and Docker Engine in detail.

This Docker tutorial also includes a Hands-On session around Docker by the end of which you will learn to pull a centos Docker Image and spin your own Docker Container. You will also see how to launch multiple docker containers using Docker Compose. Finally, it will also tell you the role Docker plays in the DevOps life-cycle.

The Hands-On session is performed on an Ubuntu-64bit machine in which Docker is installed.