Using Orchestration in Puppet Enterprise 3 - PuppetConf 2013

Using Orchestration in
Puppet Enterprise 3
Nick Fagerlund
Technical Writer | Puppet Labs
@nfagerlund
Friday, August 23, 13

puppetconf.com #puppetconf
HI.

How’s it goin.

Let’s talk about
orchestration!
Raise your hand if you know what it is.

Specifically,
let’s talk about…
• What it is, why you use it, and when
• HOW???
• Cool new features in Puppet Enterprise 3
• Concrete use cases

I already took notes for
you.

http://docs.puppetlabs.com/pe/latest

OK,what’s orchestration.

It’s not configuration
management.
It’s a different kind of automation.
They’re complementary!

Config management is:
• Modeling a desired state for systems…
• …enforcing that desired state…
• …and updating the model in order to
update the state.

Orchestration is about:
• Executing actions…
• …on demand…
• …on a ﬂexible group of systems.

???

What’s an “action?”
• Pre-deﬁned actions are distributed as
plugins.
• Actions have structured inputs and
outputs.
• Actions can do... like, whatever. (Several
built-in, or write your own.)

What’s “on demand?”
• Whenever you want—
• —either really quickly and in parallel—
• —or in a controlled series of batches.

Flexible group of systems?
• Select nodes by fact values
• Select by Puppet classes
• Select with dynamic data discovery
Instead of using a list of hostnames, set criteria
to match against.

Why orchestrate?

• Controlling conﬁg management

• Gathering information

• Application deployment

• Routine or emergency maintenance

• Routine or emergency maintenance
• Any of your day-to-day work that must
happen interactively

Basically: What tasks do
you want to Run Better on
Lots of Nodes?

How do you use
orchestration?

(We wrote
this down.)
http://docs.puppetlabs.com/pe/
latest/
orchestration_invoke_cli.html

Two ways to invoke actions
• In the PE console
• On the command line

Two ways to invoke actions
• In the PE console
• On the command line
(focusing here for
today!)

1. Go to the command line
• SSH to puppet master server
• Switch user to “peadmin”

2. Decide on three things
• What action?
• What inputs/arguments?
• On which kinds of nodes?

3. Run your command
• mco <SUBCOMMAND> <ARGUMENTS>
<OPTIONS> <FILTER>

Finding
actions/
inputs:
latest/
orchestration_actions.html

Finding filter
information
latest/
orchestration_invoke_cli.html#
ﬁltering-actions

Demo time!

What did we just see?

The mco command
• The mco command controls the
orchestration engine.
• It has a bunch of subcommands, whose
syntax can vary.

The subcommands
• mco rpc is the generic subcommand. It can
do basically anything.
• All the other subcommands are simpler
ways to do things you could probably do
with mco rpc.

Specialized subcommands
• mco ping is exactly what it sounds like.
• mco ﬁnd is a fast way to test ﬁlters.
• mco service mimics the familiar service
command.
• mco package mimics apt and yum
commands.

Specialized subcommands
• And mco puppet is for controlling Puppet.

How about those new
features?

Batching / progressive
deployment
• --batch <SIZE>
• --batch-sleep <SECONDS>

Batching / progressive
deployment
• Good for rolling out new Puppet modules!

(demo)

Data plugins / dynamic
discovery
• $ mco rpc puppet status -S
"puppet().enabled=false"

Data plugins / dynamic
discovery
• Advanced ﬁltering
• Ad-hoc monitoring and reporting

Sampling/limiting
• --1
• --limit <COUNT>

What next?

The built-in actions are
useful,but orchestration
really shines when you roll
your own.

For example:

(That’s it,that’s all the code.)

Info about
writing
actions
latest/
orchestration_adding_actions.ht
ml#writing-mcollective-agent-
plugins

Say hi later,and I can show
you more!

Thank You
Nick Fagerlund
Technical Writer | Puppet Labs
@nfagerlund
Collaborate. Automate. Ship.

Follow us on Twitter @puppetlabs
youtube.com/puppetlabsinc
slideshare.net/puppetlabs
Collaborate. Automate. Ship.

Using Orchestration in Puppet Enterprise 3 - PuppetConf 2013

More Related Content

Similar to Using Orchestration in Puppet Enterprise 3 - PuppetConf 2013

More from Puppet

Recently uploaded

Using Orchestration in Puppet Enterprise 3 - PuppetConf 2013