DevOps <3 node.js

DevOps <3 node.js
github.com/miccolis | twitter.com/miccolis

SaaS DevOps
@mapbox
Not the kind of job where I expected to use javascript.

“Ah, right server side
javascript”
What is node.js again?

“Yea, cool so your front end devs can help,
and you can use the same libraries, and
probably even run all the same code on the
server or the client, right? That’s great!”
Everyone’s ﬁrst response to node.js

No.
Everyone’s ﬁrst response to node.js
is wrong.

<html>
<body>
<script>
alert("Hello World");
</script>
</body>
</html>

<html>
<head>
<script src="jquery-1.2.6.min.js"></script>
</head>
<body>
<script>
$(document).ready(function(){
$("#mydiv").html("Hello World");
});
</script>
<div id="mydiv"></div>
</body>
</html>

$(document).ready()
...will be disregarded as just boilerplate.

It’s true, you can use
the same libraries.
They all expect async I/O

And build a framework
where the application can
run on the client or server!
https://github.com/developmentseed/bones

It’s not what most people
expect, but there are good
parts.

Async I/O
Done the most simple way that could possibly work.

First class server
support
The node.js ‘hello world’ is a HTTP server,
in 6 lines.

A package manager
The best I’ve ever worked with.

The kinds of things that
make my life easier.

Node.js & C10K
1. Event loop & non-blocking I/O
2. Simple & direct API; `callback(err, ...)`
3. ?
4. Proﬁt

Node.js & HTTP
• Any node.js program is a HTTP server (or
could become one with trivial effort).
• Your program is deﬁned by its HTTP API,
and can be tested as such.
• Stateless, tested == rapidly deployable.

Node.js & NPM
• Requires semantic versioning.
• Completely captures dependencies.
• Handles multiple instances of the same
package with different versions.
• Wildly inclusive.

Building servers
• Lots of small projects
• Scale independently
• Varying lifecycles

Packaging
• Every commit hits CI testing
• Every commit is built into a deployable
“slug”
• Anything merged into `master` is
considered production ready.

Streamlined
deployment
• Main client-side application is automatically
deployed on every update to `master`.
• Other applications can be deployed by any
developer using a single CLI command.*
* database cluster’s still require babysitting.

Because I need HTTP
servers that scale...
Why node.js?

...and a strong open source
community helping with
libraries.
Why node.js?

DevOps <3 node.js

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