Install Gcc In Docker

Posted : admin On 12.08.2021

The Docker extension makes it easy to build, manage, and deploy containerized applications from Visual Studio Code.

This page provides an overview of the Docker extension capabilities; use the side menu to learn more about topics of interest. If you are just getting started with Docker development, try the Docker tutorial first to understand key Docker concepts.

Installation

Install Docker on your machine and add it to the system path.

On Linux, you should also enable Docker CLI for the non-root user account that will be used to run VS Code.

To install the extension, open the Extensions view (⇧⌘X (Windows, Linux Ctrl+Shift+X)), search for docker to filter results and select Docker extension authored by Microsoft.

Editing Docker files

You can get IntelliSense when editing your Dockerfile and docker-compose.yml files, with completions and syntax help for common commands.

Example Dockerfile for your own Node.js project. If you're doing your npm install/npm ci or yarn install from your Dockerfile, then you'll probably want to add nodemodules to your.dockerignore file first, so that it doesn't get sent to the docker daemon. When you’re choosing a base image for your Docker image, Alpine Linux is often recommended. Using Alpine, you’re told, will make your images smaller and speed up your builds. And if you’re using Go that’s reasonable advice. But if you’re using Python, Alpine Linux will quite often: Make your builds much slower. Make your images bigger. Waste your time. On occassion, introduce obscure.

BetterCAP is containerized using Alpine Linux - a security-oriented, lightweight Linux distribution based on musl libc and busybox. The resulting Docker image is relatively small and easy to manage the dependencies. Since it is using a multi-stage build, a Docker version greater than 17.05 is required. In this guide, you will learn how to optimize Docker images in a few simple steps, making them smaller, faster, and better suited for production. You'll build images for a sample Go API in several different Docker containers, starting with Ubuntu. One good approach to work with GCC in mac is to install docker and run a container with GCC and mount a directory with the container.

In addition, you can use the Problems panel (⇧⌘M (Windows, Linux Ctrl+Shift+M)) to view common errors for Dockerfile and docker-compose.yml files.

Generating Docker files

You can add Docker files to your workspace by opening the Command Palette (⇧⌘P (Windows, Linux Ctrl+Shift+P)) and using Docker: Add Docker Files to Workspace command. The command will generate Dockerfile and .dockerignore files and add them to your workspace. The command will also query you if you want the Docker Compose files added as well; this is optional.

The extension recognizes workspaces that use most popular development languages (C#, Node.js, Python, Ruby, Go, and Java) and customizes generated Docker files accordingly.

(c) EA Games 03/2013: RELEASE.DATE.Crysis 3 Update v1.1 INTERNAL-RELOADED Skidrow Games.Crysis 3 Update v1.1 INTERNAL-RELOADED. Ea crysis 3 update v1 2 internal reloaded torrents torrent. Download Ddlsource com Crysis 3 Update v1 3 INTERNAL.ddlsource com Crysis 3 Update v1 3 INTERNAL RELOADED download Related files to: ddlsource com crysis 3 update v1 3 internal reloaded.Crysis.3.Update.v1.3.INTERNAL-RELOADED (download torrent.nERv Crysis 3 Update v1.3.INTERNAL. PROTECTION.: Securom/EADRMCrysis.3.Update.v1.2.INTERNAL-RELOADED (download torrent.Crysis.3.Update.v1.2.INTERNAL-RELOADED Type: Games PC Files: 6 Size: nERv Crysis 3 Update Patch v1.2.INTERNAL. (c) EA Games 04/2013.

Docker Explorer

The Docker extension contributes a Docker Explorer view to VS Code. The Docker Explorer lets you examine and manage Docker assets: containers, images, volumes, networks, and container registries. If the Azure Account extension is installed, you can browse your Azure Container Registries as well.

The right-click menu provides access to commonly used commands for each type of asset.

You can rearrange the Docker Explorer panes by dragging them up or down with a mouse and use the context menu to hide or show them.

Docker commands

Many of the most common Docker commands are built right into the Command Palette:

You can run Docker commands to manage images, networks, volumes, image registries, and Docker Compose. In addition, the Docker: Prune System command will remove stopped containers, dangling images, and unused networks and volumes.

Using image registries

You can display the content and push/pull/delete images from Azure Container Registry, Docker Hub, GitLab, and more:

An image in an Azure Container Registry can be deployed to Azure App Service directly from VS Code; see Deploy images to Azure App Service page. For more information about how to authenticate to and work with registries see Using container registries page.

Debugging services running inside a container

You can debug services built using .NET (C#) and Node.js that are running inside a container. The extension offers custom tasks that help with launching a service under the debugger and with attaching the debugger to a running service instance. For more information see Debug container application and Extension Properties and Tasks pages.

Azure CLI integration

You can start Azure CLI (command-line interface) in a standalone, Linux-based container with Docker Images: Run Azure CLI command. This allows access to full Azure CLI command set in an isolated environment. See Get started with Azure CLI page for more information on available commands.

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.

Next steps

Read on to learn more about

When you’re choosing a base image for your Docker image, Alpine Linux is often recommended.Using Alpine, you’re told, will make your images smaller and speed up your builds.And if you’re using Go that’s reasonable advice.

But if you’re using Python, Alpine Linux will quite often:

Install Gcc In Alpine Docker

  1. Make your builds much slower.
  2. Make your images bigger.
  3. Waste your time.
  4. On occassion, introduce obscure runtime bugs.

Let’s see why Alpine is recommended, and why you probably shouldn’t use it for your Python application.

Why people recommend Alpine

Let’s say we need to install gcc as part of our image build, and we want to see how Alpine Linux compares to Ubuntu 18.04 in terms of build time and image size.

First, I’ll pull both images, and check their size:

As you can see, the base image for Alpine is much smaller.

Next, we’ll try installing gcc in both of them.First, with Ubuntu:

Note: Outside the very specific topic under discussion, the Dockerfiles in this article are not examples of best practices, since the added complexity would obscure the main point of the article.

To ensure you’re writing secure, correct, fast Dockerfiles, consider my Python on Docker Production Handbook, which includes a packaging process and >70 best practices.

Install Gcc In Docker

We can then build and time that:

Now let’s make the equivalent Alpine Dockerfile:

And again, build the image and check its size:

As promised, Alpine images build faster and are smaller: 15 seconds instead of 30 seconds, and the image is 105MB instead of 150MB.That’s pretty good!

But when we switch to packaging a Python application, things start going wrong.

Let’s build a Python image

We want to package a Python application that uses pandas and matplotlib.So one option is to use the Debian-based official Python image (which I pulled in advance), with the following Dockerfile:

And when we build it:

Install Gcc In Docker Ubuntu

The resulting image is 363MB.

Install Gcc In Docker Centos

Can we do better with Alpine? Let’s try:

And now we build it:

What’s going on?

Standard PyPI wheels don’t work on Alpine

If you look at the Debian-based build above, you’ll see it’s downloading matplotlib-3.1.2-cp38-cp38-manylinux1_x86_64.whl.This is a pre-compiled binary wheel.Alpine, in contrast, downloads the source code (matplotlib-3.1.2.tar.gz), because standard Linux wheels don’t work on Alpine Linux.

Why?Most Linux distributions use the GNU version (glibc) of the standard C library that is required by pretty much every C program, including Python.But Alpine Linux uses musl, those binary wheels are compiled against glibc, and therefore Alpine disabled Linux wheel support.

Most Python packages these days include binary wheels on PyPI, significantly speeding install time.But if you’re using Alpine Linux you need to compile all the C code in every Python package that you use.

Which also means you need to figure out every single system library dependency yourself.In this case, to figure out the dependencies I did some research, and ended up with the following updated Dockerfile:

And then we build it, and it takes…

Install Gcc Python Docker

… 25 minutes, 57 seconds! And the resulting image is 851MB.

Here’s a comparison between the two base images:

Base imageTime to buildImage sizeResearch required
python:3.8-slim30 seconds363MBNo
python:3.8-alpine1557 seconds851MBYes

Alpine builds are vastly slower, the image is bigger, and I had to do a bunch of research.

Docker

Can’t you work around these issues?

Build time

For faster build times, Alpine Edge, which will eventually become the next stable release, does have matplotlib and pandas.And installing system packages is quite fast.As of January 2020, however, the current stable release does not include these popular packages.

Even when they are available, however, system packages almost always lag what’s on PyPI, and it’s unlikely that Alpine will ever package everything that’s on PyPI.In practice most Python teams I know don’t use system packages for Python dependencies, they rely on PyPI or Conda Forge.

Image size

Some readers pointed out that you can remove the originally installed packages, or add an option not to cache package downloads, or use a multi-stage build.One reader attempt resulted in a 470MB image.

So yes, you can get an image that’s in the ballpark of the slim-based image, but the whole motivation for Alpine Linux is smaller images and faster builds.With enough work you may be able to get a smaller image, but you’re still suffering from a 1500-second build time when they you get a 30-second build time using the python:3.8-slim image.

But wait, there’s more!

Alpine Linux can cause unexpected runtime bugs

Install Gcc In Docker Linux

While in theory the musl C library used by Alpine is mostly compatible with the glibc used by other Linux distributions, in practice the differences can cause problems.And when problems do occur, they are going to be strange and unexpected.

Some examples:

  1. Alpine has a smaller default stack size for threads, which can lead to Python crashes.
  2. One Alpine user discovered that their Python application was much slower because of the way musl allocates memory vs. glibc.
  3. I once couldn’t do DNS lookups in Alpine images running on minikube (Kubernetes in a VM) when using the WeWork coworking space’s WiFi.The cause was a combination of a bad DNS setup by WeWork, the way Kubernetes and minikube do DNS, and musl’s handling of this edge case vs. what glibc does.musl wasn’t wrong (it matched the RFC), but I had to waste time figuring out the problem and then switching to a glibc-based image.
  4. Another user discovered issues with time formatting and parsing.

Most or perhaps all of these problems have already been fixed, but no doubt there are more problems to discover.Random breakage of this sort is just one more thing to worry about.

Don’t use Alpine Linux for Python images

Install Gcc In Docker Container

Unless you want massively slower build times, larger images, more work, and the potential for obscure bugs, you’ll want to avoid Alpine Linux as a base image.For some recommendations on what you should use, see my article on choosing a good base image.