This document introduces systems orchestration using MCollective. It discusses how middleware and agents in MCollective are like sheet music that can direct collections of nodes. Examples are provided to restart the SSH service on nodes using MCollective by looping through nodes and calling RPC services to restart and check the status of the SSH daemon. The document invites questions and encourages readers to consider working for the company.

1. Intro
to
Systems
Orchestra0on
With
MCollec0ve

2. What
is
Orchestra0on?

5. Hello!

6. R.I.Pienaar
(h>p://www.devco.net/)

7. THANK
YOU!

11. Middleware

22. Agents
==
sheet
music

24. Collec0ves

30. Filters
==
find
a
sec0on

31. Use
this
stuff

32. Using
it
==
direct
one
sec0on

33. Yeah,
not
an
orchestra
yet

34. What
to
do?

35. #!/bin/bash
-­‐e
for
node
in
$(mco
find
-­‐-­‐np
-­‐C
roles::node)
do
echo
"restar0ng
ssh
on
$node"
mco
service
-­‐-­‐np
sshd
restart
-­‐I
$node
>/dev/null
sleep
2
mco
rpc
service
status
service=sshd
-­‐I
$node
-­‐j
|
jgrep
data.status=running
-­‐s
data.status
>/dev/null
echo
"ssh
is
up
on
$node"
done

36. #!/usr/bin/ruby
require
'mcollec0ve'
require
'pp'
include
MCollec0ve::RPC
#
discover
u0l
=
rpcclient("rpcu0l")
u0l.progress
=
false
u0l.class_filter
/roles::node/
nodes
=
[]
u0l.ping.each
do
|resp|
nodes
<<
resp[:sender]
end
u0l.disconnect
nodes.each
do
|node|
srv
=
rpcclient("service")
srv.progress
=
false
srv.iden0ty_filter
node
puts
"restar0ng
sshd
on
#{node}"
srv.restart(:service
=>
"sshd")
srv.reset
<snip>

37. Ques0ons?

38. Come
Work
for
Us!