The 99% of Your Code You Don't Write

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Из курса от партнера University of Virginia

Continuous Delivery & DevOps

139 оценки

University of Virginia

Continuous Delivery & DevOps

139 оценки

Amazon famously delivers new code every 11.6 seconds. Just a few years ago, this was unthinkable: many ‘cutting edge’ firms would release software quarterly. When it comes to digital innovation, velocity is critical and many would say it’s the most reliable determinant of success. Bringing an organization to the state of the art (or even functional capability) in this area requires strong work in a combination of disciplines and a combination of both technical and managerial skills. There is no single cookie-cutter approach for achieving this capability. Much like agile, the right focus and formulation depends a lot on the facts and circumstances of the team. This course will provide you with the interdisciplinary skill set to cultivate a continuous deployment capability in your organization. After completing this course, you will be able to: 1. Diagnose a team’s delivery pipeline and bring forward prioritized recommendations to improve it 2. Explain the skill sets and roles involved in DevOps and how they contribute toward a continuous delivery capability 3. Review and deliver automation tests across the development stack 4. Explain the key jobs of system operations and how today’s leading techniques and tools apply to them 5. Explain how high-functioning teams use DevOps and related methods to reach a continuous delivery capability 6. Facilitate prioritized, iterative team progress on improving a delivery pipeline

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Infrastructure and The Jobs of Ops

Something like 99% of the code that delivers your functionality to the user is code you don’t write- it’s an operating system and supporting packages from third parties. The quality and availability of standard components has driven down the cost of software development exponentially. It’s also increased the importance of managing this supporting code and the environments where it runs to support your application. In this week, we’ll look at the techniques and tools teams are using to manage their environments and operations for continuous delivery.

The 99% of Your Code You Don't Write3:33

Who Is this Ops Person?6:45

The Job of Ops Sys Admin6:22

The Job of Designing5:07

The Job of Deploying2:36

The Job of Maintaining3:27

The Job of Monitoring3:24

Познакомьтесь с преподавателями

Alex Cowan
Faculty & Batten Fellow
Darden School of Business

Welcome to week three.

Interesting fact, the Linux Kernel,

Linux is a popular operating system where you might run a web application,

it's got about 15 million lines of code, 15.

A large application that you might run on top of that operating system is,

say, 100,000 lines, it's very big.

So, 99% of this code that you're using is code that you didn't write,

and it's actually a great thing because why write a bunch of code that you don't have to?

Your competitor does that and makes better use of these off-the-shelf components,

they'll probably running at a much lower cost especially it's a ongoing maintenance.

So, this use of

really well-put-together standard components is

an increasingly important part of software development and helping

to organize this standardize all-that-stuff under the hood

and giving it some place to run properly and keeping it operating,

these are generally the jobs of operations..

So, prior to this,

we've looked at the idea of DevOps and the idea of a Pipeline,

we've talked about how both developers and testers create a test stack.

Now, we're going to look at how they interact with

this general job of operations to keep stuff running.

What we're going to do is look at the fundamental jobs of operations.

So, regardless of whatever technology

or trends are changing the way that this job is done,

what are the basic things that have to get done in

this area so that you can think about how you're doing them now

versus how you might want to evolve them based on emerging methods and

patterns and tools and facilities that are available

to potentially help you operate even better?

There are two really big changes in

this area that are driving a lot of this change that you may see.

One, is the movement to more what people generally call Serverless Architectures.

The basic idea is that rather than getting

our own physical servers and putting them someplace and operating them and owning them,

it is economically more scalable for somebody else to just have a gigantic,

totally automated, huge scale capability and rent those back to us.

So this idea of a Serverless Architecture where we're getting more of an abstraction,

somebody else takes care of all the underlying details,

is changing a lot of what this job is about and how it's done and who does it.

Then the second, tightly related idea is that,

now that we can do all of these things and there's less of

this physical maintenance and custom configuration and things like that,

we can treat this infrastructure as code itself.

So for example, rather than writing this three pages that have

12 elaborate steps that I have to log in to server one and

do and login to server two and do which I've done and was terrible,

now, what we might do instead is as a team or as an operations person or a DevOps person,

write a configuration file of some sort

that feeds into some sort of a platform and automatically does all that stuff.

This is the analog to automated testing in the job of Ops.

This allows us to standardize what we're doing,

test it as we go along,

and make it extremely repeatable and scalable and generally less terrifying and

less error prone to upgrade our software and roll out new infrastructure.

So, those are the things we're going to cover here in

week three as we dive into the job of Ops.

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