Skip to main content

Docker and Linux Containers on Windows, with or without Hyper-V Virtual Machines

Containers are lovely, in case you haven't heard. They are a nice and clean way to get a reliable and guaranteed deployment, no matter the host system.

If I want to run my my ASP.NET Core application, I can just type "docker run -p 5000:80 shanselman/demos" at the command line, and it'll start up! I don't have any concerns that it won't run. It'll run, and run well.

Some containers naysayers say , sure, we could do the same thing with Virtual Machines, but even today, a VHD (virtual hard drive) is rather an unruly thing and includes a ton of overhead that a container doesn't have. Containers are happening and you should be looking hard at them for your deployments.

docker run shanselman/demos

Historically on Windows, however, Linux Containers run inside a Hyper-V virtual machine. This can be a good thing or a bad thing, depending on what your goals are. Running Containers inside a VM gives you significant isolation with some overhead. This is nice for Servers but less so for my laptop. Docker for Windows hides the VM for the most part, but it's there. Your Container runs inside a Linux VM that runs within Hyper-V on Windows proper.

HyperV on Windows

With the latest version of Windows 10 (or 10 Server) and the beta of Docker for Windows, there's native Linux Container support on Windows. That means there's no Virtual Machine or Hyper-V involved (unless you want), so Linux Containers run on Windows itself using Windows 10's built in container support.

For now you have to switch "modes" between Hyper V and native Containers, and you can't (yet) run Linux and Windows Containers side by side. The word on the street is that this is just a point in time thing, and that Docker will at some point support running Linux and Windows Containers in parallel. That's pretty sweet because it opens up all kinds of cool hybrid scenarios. I could run a Windows Server container with an .NET Framework ASP.NET app that talks to a Linux Container running Redis or Postgres. I could then put them all up into Kubernetes in Azure, for example.

Once I've turned Linux Containers on Windows on within Docker, everything just works and has one less moving part.

Linux Containers on Docker

I can easily and quickly run busybox or real Ubuntu (although Windows 10 already supports Ubuntu natively with WSL):

docker run -ti busybox sh

More useful even is to run the Azure Command Line with no install! Just "docker run -it microsoft/azure-cli" and it's running in a Linux Container.

Azure CLI in a Container

I can even run nyancat! (Thanks Thomas!)

docker run -it supertest2014/nyan

nyancat!

Speculating - I look forward to the day I can run "minikube start --vm-driver="windows" (or something) and easily set up a Kubernetes development system locally using Windows native Linux Container support rather than using Hyper-V Virtual Machines, if I choose to.

Sponsor: Why miss out on version controlling your database? It’s easier than you think because SQL Source Control connects your database to the same version control tools you use for applications. Find out how.

© 2017 Scott Hanselman. All rights reserved.
     


from Scott Hanselman's Blog http://feeds.hanselman.com/~/495817774/0/scotthanselman~Docker-and-Linux-Containers-on-Windows-with-or-without-HyperV-Virtual-Machines.aspx
Labels:

Comments

Post a Comment

Popular posts from this blog

Rail Fence Cipher Program in C and C++[Encryption & Decryption]

Here you will get rail fence cipher program in C and C++ for encryption and decryption. It is a kind of transposition cipher which is also known as zigzag cipher. Below is an example. Here Key = 3. For encryption we write the message diagonally in zigzag form in a matrix having total rows = key and total columns = message length. Then read the matrix row wise horizontally to get encrypted message. Rail Fence Cipher Program in C #include<stdio.h> #include<string.h> void encryptMsg(char msg[], int key){ int msgLen = strlen(msg), i, j, k = -1, row = 0, col = 0; char railMatrix[key][msgLen]; for(i = 0; i < key; ++i) for(j = 0; j < msgLen; ++j) railMatrix[i][j] = '\n'; for(i = 0; i < msgLen; ++i){ railMatrix[row][col++] = msg[i]; if(row == 0 || row == key-1) k= k * (-1); row = row + k; } printf("\nEncrypted Message: "); for(i = 0; i < key; ++i) f...
3 comments
Read more

Data Encryption Standard (DES) Algorithm

Data Encryption Standard is a symmetric-key algorithm for the encrypting the data. It comes under block cipher algorithm which follows Feistel structure. Here is the block diagram of Data Encryption Standard. Fig1: DES Algorithm Block Diagram [Image Source: Cryptography and Network Security Principles and Practices 4 th Ed by William Stallings] Explanation for above diagram: Each character of plain text converted into binary format. Every time we take 64 bits from that and give as input to DES algorithm, then it processed through 16 rounds and then converted to cipher text. Initial Permutation: 64 bit plain text goes under initial permutation and then given to round 1. Since initial permutation step receiving 64 bits, it contains an 1×64 matrix which contains numbers from 1 to 64 but in shuffled order. After that, we arrange our original 64 bit text in the order mentioned in that matrix. [You can see the matrix in below code] After initial permutation, 64 bit text passed throug...
Post a Comment
Read more

Experimental: Reducing the size of .NET Core applications with Mono's Linker

The .NET team has built a linker to reduce the size of .NET Core applications. It is built on top of the excellent and battle-tested mono linker . The Xamarin tools also use this linker so it makes sense to try it out and perhaps use it everywhere! "In trivial cases, the linker can reduce the size of applications by 50%. The size wins may be more favorable or more moderate for larger applications. The linker removes code in your application and dependent libraries that are not reached by any code paths. It is effectively an application-specific dead code analysis ." - Using the .NET IL Linker I recently updated a 15 year old .NET 1.1 application to cross-platform .NET Core 2.0 so I thought I'd try this experimental linker on it and see the results. The linker is a tool one can use to only ship the minimal possible IL code and metadata that a set of programs might require to run as opposed to the full libraries. It is used by the various Xamarin products to extract...
Post a Comment
Read more