Docker
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Chris Maunder wrote:
After reading (for maybe the 10th time over the last year): Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications. etc... I still don't know: 1. What it actually does 2. What's wrong with how I'm currently delivering web and desktop applications 3. And therefore, why I need it. 4. And does it really do what the hype says it does, even though I don't understand it? Oh sorry. The answer to your question in "No." Marc
Imperative to Functional Programming Succinctly Higher Order Programming
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Not yet, I'm just now switching over to vagrant, but docker is next on my list of things to check out.
Curvature of the Mind now with 3D
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Chris Maunder wrote:
After reading (for maybe the 10th time over the last year): Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications. etc... I still don't know: 1. What it actually does 2. What's wrong with how I'm currently delivering web and desktop applications 3. And therefore, why I need it. 4. And does it really do what the hype says it does, even though I don't understand it? Oh sorry. The answer to your question in "No." Marc
Imperative to Functional Programming Succinctly Higher Order Programming
I've not used it personally, but some on our team have used it. It's essentially an abstraction layer for deploying on Linux servers. Yeah - their market-speke is hard to get through. Just tell us what it is, dammit! It's going to be integrated into Windows Server 2015 (a neat trick, it would seem). To me it's like deploying an install as a VM, without the actually deploying a VM (and it's Gig's of OS)
cheers Chris Maunder
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Yes. In my experience the major advantage of VE instances over a full VM is the incredibly fast start-up time and minimal system load. If you're looking to distribute pre-configured machine instances you should also evaluate Vagrant [^]. Vagrant can provision both Docker containers and Virtualbox VMs.
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I've not used it personally, but some on our team have used it. It's essentially an abstraction layer for deploying on Linux servers. Yeah - their market-speke is hard to get through. Just tell us what it is, dammit! It's going to be integrated into Windows Server 2015 (a neat trick, it would seem). To me it's like deploying an install as a VM, without the actually deploying a VM (and it's Gig's of OS)
cheers Chris Maunder
We are going to hear a lot more about Docker in the years to come. It is difficult to explain it in few words, but it is basically a "container". It leverages recent OS technologies that allows one process to be isolated from others. It was first developed for Linux, now it is finding its way to Windows. This is essential for Microsoft, as Docker images are becoming the standard way for cloud deployments. Do you want to install Redmine? Sure, you need to install Ruby, MySQL and then the Redmine itself. It is far easier to find a dockerized redmine and deploy from there in seconds.
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Chris Maunder wrote:
After reading (for maybe the 10th time over the last year): Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications. etc... I still don't know: 1. What it actually does 2. What's wrong with how I'm currently delivering web and desktop applications 3. And therefore, why I need it. 4. And does it really do what the hype says it does, even though I don't understand it? Oh sorry. The answer to your question in "No." Marc
Imperative to Functional Programming Succinctly Higher Order Programming
I feel the same and in my case, I've read about it maybe 15 times :~
To alcohol! The cause of, and solution to, all of life's problems - Homer Simpson ---- Our heads are round so our thoughts can change direction - Francis Picabia
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Chris Maunder wrote:
After reading (for maybe the 10th time over the last year): Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications. etc... I still don't know: 1. What it actually does 2. What's wrong with how I'm currently delivering web and desktop applications 3. And therefore, why I need it. 4. And does it really do what the hype says it does, even though I don't understand it? Oh sorry. The answer to your question in "No." Marc
Imperative to Functional Programming Succinctly Higher Order Programming
Docker isn't that hard to explain. And, no, it isn't a VM or a VM controller. (That's Vagrant) Docker is similar to Solaris Zones, BSD Jails, and Linux Containers. It's not (supposed to be) a virtual machine (with all the OS code, drivers, etc.) but rather lightweight container allowing calls down to the OS. (And no, I have no idea how Docker is going to make that work with Microsoft) So...why it is important? Well the difference with Docker is that it allows you to push your application AND ENVIRONMENT at the same time...to Development, to Testing...and (ideally) to production. (You wouldn't normally push a Vagrant file to production, for example). It (ideally) prevents problems of code failing in production because a config file was off, or an environment variable that wasn't set, or a wrong version of a library. There is a LOT of hype and some concerns about security - but that's it in a nutshell.
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We are going to hear a lot more about Docker in the years to come. It is difficult to explain it in few words, but it is basically a "container". It leverages recent OS technologies that allows one process to be isolated from others. It was first developed for Linux, now it is finding its way to Windows. This is essential for Microsoft, as Docker images are becoming the standard way for cloud deployments. Do you want to install Redmine? Sure, you need to install Ruby, MySQL and then the Redmine itself. It is far easier to find a dockerized redmine and deploy from there in seconds.
Giannakakis Kostas wrote:
It is difficult to explain it in few words
Then you don't know what it is. If you knew it well, you'd be able to explain it to us.
Jeremy Falcon
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Docker isn't that hard to explain. And, no, it isn't a VM or a VM controller. (That's Vagrant) Docker is similar to Solaris Zones, BSD Jails, and Linux Containers. It's not (supposed to be) a virtual machine (with all the OS code, drivers, etc.) but rather lightweight container allowing calls down to the OS. (And no, I have no idea how Docker is going to make that work with Microsoft) So...why it is important? Well the difference with Docker is that it allows you to push your application AND ENVIRONMENT at the same time...to Development, to Testing...and (ideally) to production. (You wouldn't normally push a Vagrant file to production, for example). It (ideally) prevents problems of code failing in production because a config file was off, or an environment variable that wasn't set, or a wrong version of a library. There is a LOT of hype and some concerns about security - but that's it in a nutshell.
thomas.michaud wrote:
Solaris Zones, BSD Jails, and Linux Containers.
:laugh: I haven't clue as to what those things are.
thomas.michaud wrote:
It (ideally) prevents problems of code failing in production because a config file was off, or an environment variable that wasn't set, or a wrong version of a library.
Hmm, I've heard those promises before and I've never seen a technology solution that actually works. It usually requires people following correct procedures rather than some complex technology.
thomas.michaud wrote:
but rather lightweight container allowing calls down to the OS.
Indeed, how that is going to work in Windows is going to be interesting to see.
thomas.michaud wrote:
but that's it in a nutshell.
That definitely helps -- Thanks! I'd still like to see an actual example though - here's the problem, here's the workflow people go through - here's how Docker solves the problem and this is what people do differently when using Docker. So far, the website reminds me of a typical Linux developer trying to explain a product - it instantly dives into geek technology rather than focusing on people and their processes. It's a problem I constantly struggle with myself too! Marc
Imperative to Functional Programming Succinctly Higher Order Programming
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Giannakakis Kostas wrote:
It is difficult to explain it in few words
Then you don't know what it is. If you knew it well, you'd be able to explain it to us.
Jeremy Falcon
Docker is nicely explained in this "short" video. If you don't have the time to watch it, you should at least know that is quickly becoming the standard for cloud deployment.
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thomas.michaud wrote:
Solaris Zones, BSD Jails, and Linux Containers.
:laugh: I haven't clue as to what those things are.
thomas.michaud wrote:
It (ideally) prevents problems of code failing in production because a config file was off, or an environment variable that wasn't set, or a wrong version of a library.
Hmm, I've heard those promises before and I've never seen a technology solution that actually works. It usually requires people following correct procedures rather than some complex technology.
thomas.michaud wrote:
but rather lightweight container allowing calls down to the OS.
Indeed, how that is going to work in Windows is going to be interesting to see.
thomas.michaud wrote:
but that's it in a nutshell.
That definitely helps -- Thanks! I'd still like to see an actual example though - here's the problem, here's the workflow people go through - here's how Docker solves the problem and this is what people do differently when using Docker. So far, the website reminds me of a typical Linux developer trying to explain a product - it instantly dives into geek technology rather than focusing on people and their processes. It's a problem I constantly struggle with myself too! Marc
Imperative to Functional Programming Succinctly Higher Order Programming