1.
Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4Dive into Puppet 4
A new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetizeA new way to puppetize
Julien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien Pivotto
Belgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User GroupBelgian Puppet User Group
September 10, 2015September 10, 2015September 10, 2015September 10, 2015September 10, 2015September 10, 2015September 10, 2015September 10, 2015September 10, 2015September 10, 2015September 10, 2015September 10, 2015September 10, 2015September 10, 2015September 10, 2015September 10, 2015September 10, 2015

2.
$::user$::user$::user$::user$::user$::user$::user$::user$::user$::user$::user$::user$::user$::user$::user$::user$::user
Julien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien Pivotto
• Open-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.euOpen-Source consultant at inuits.eu
• Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011Puppet User since 2011
• Speaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at PuppetcampsSpeaker/attendee at Puppetcamps
• Member of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUGMember of the Belgian PUG
• Puppet core contributorPuppet core contributorPuppet core contributorPuppet core contributorPuppet core contributorPuppet core contributorPuppet core contributorPuppet core contributorPuppet core contributorPuppet core contributorPuppet core contributorPuppet core contributorPuppet core contributorPuppet core contributorPuppet core contributorPuppet core contributorPuppet core contributor
• Puppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributorPuppet(labs) modules contributor
• @roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie on irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/githubon irc/twitter/github

3.
inuits.eu

4.
IntroductionIntroductionIntroductionIntroductionIntroductionIntroductionIntroductionIntroductionIntroductionIntroductionIntroductionIntroductionIntroductionIntroductionIntroductionIntroductionIntroduction

5.
Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011Puppetmaster since 2011
• PPPPPPPPPPPPPPPPPuppet 2.6/2.7
• RRRRRRRRRRRRRRRRReports stored with activerecord
• PPPPPPPPPPPPPPPPPuppet Dashboard
• NNNNNNNNNNNNNNNNNo hiera
• NNNNNNNNNNNNNNNNNo PuppetDB

6.
Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011Puppet 2.7 - June 2011
• RRRRRRRRRRRRRRRRRuby 1.9 support
• AAAAAAAAAAAAAAAAApache 2.0 Licence
• TTTTTTTTTTTTTTTTThe end of "random" catalog order
• SSSSSSSSSSSSSSSSSupport for network devices
• DDDDDDDDDDDDDDDDDeprecation of dynamic variables

7.
Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012Puppet 3.0.0 - October 2012
• SSSSSSSSSSSSSSSSSupport for 3rd parties gems
• NNNNNNNNNNNNNNNNNative hiera support
• AAAAAAAAAAAAAAAAAutomatic hiera lookups
• RRRRRRRRRRRRRRRRRemove dynamic scope lookup
• SSSSSSSSSSSSSSSSSemantic versioning

8.
Puppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x seriesPuppet 3.x series
• FFFFFFFFFFFFFFFFFuture parser (3.2.0)
• """""""""""""""""contain" keyword (3.4.0)
• dddddddddddddddddirectory environments (3.5.0)

9.
Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4
Licensed under a Creative Commons Attribution 2.0 License
https://www.flickr.com/photos/mujitra/4421810399

10.
The big pictureThe big pictureThe big pictureThe big pictureThe big pictureThe big pictureThe big pictureThe big pictureThe big pictureThe big pictureThe big pictureThe big pictureThe big pictureThe big pictureThe big pictureThe big pictureThe big picture
• NNNNNNNNNNNNNNNNNew DSL language
• AAAAAAAAAAAAAAAAAll-in-one Package
• PPPPPPPPPPPPPPPPPuppetserver

11.
A new DSLA new DSLA new DSLA new DSLA new DSLA new DSLA new DSLA new DSLA new DSLA new DSLA new DSLA new DSLA new DSLA new DSLA new DSLA new DSLA new DSL
Apache 2.0 License
https://github.com/ke4qqq/puppet-cloudstack

12.
Domain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific LanguageDomain Specific Language
The goal of the Puppet DSL stays
the same: describe the final state of
your infrastructure.

13.
The new DSL gets closer to other
programming languages: types,
iterations, predictive ordering…

14.
OrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrdering
Licensed under a Creative Commons Attribution-ShareAlike 2.0 License
https://www.flickr.com/photos/lambertclement/19543885696

15.
order.pporder.pporder.pporder.pporder.pporder.pporder.pporder.pporder.pporder.pporder.pporder.pporder.pporder.pporder.pporder.pporder.pp
notify { ’ B e l g i a n ’ : }
notify { ’ Puppet ’ : }
notify { ’ User ’ : }
notify { ’ Group ’ : }

16.
Puppet 3.xPuppet 3.xPuppet 3.xPuppet 3.xPuppet 3.xPuppet 3.xPuppet 3.xPuppet 3.xPuppet 3.xPuppet 3.xPuppet 3.xPuppet 3.xPuppet 3.xPuppet 3.xPuppet 3.xPuppet 3.xPuppet 3.x
Notice: Compiled catalog for nitrogen in environment
production in 0.02 seconds
Notice: User
Notice: /Stage[main]/Main/Notify[User]/message: defined
'message ' as 'User '
Notice: Belgian
Notice: /Stage[main]/Main/Notify[Belgian]/message:
defined 'message ' as 'Belgian '
Notice: Group
Notice: /Stage[main]/Main/Notify[Group]/message: defined
'message ' as 'Group '
Notice: Puppet
Notice: /Stage[main]/Main/Notify[Puppet]/message:
defined 'message ' as 'Puppet '
Notice: Finished catalog run in 0.02 seconds

17.
Puppet 4.xPuppet 4.xPuppet 4.xPuppet 4.xPuppet 4.xPuppet 4.xPuppet 4.xPuppet 4.xPuppet 4.xPuppet 4.xPuppet 4.xPuppet 4.xPuppet 4.xPuppet 4.xPuppet 4.xPuppet 4.xPuppet 4.x
Notice: Compiled catalog for nitrogen in environment
production in 0.23 seconds
Notice: Belgian
Notice: /Stage[main]/Main/Notify[Belgian]/message:
defined 'message ' as 'Belgian '
Notice: Puppet
Notice: /Stage[main]/Main/Notify[Puppet]/message:
defined 'message ' as 'Puppet '
Notice: User
Notice: /Stage[main]/Main/Notify[User]/message: defined
'message ' as 'User '
Notice: Group
Notice: /Stage[main]/Main/Notify[Group]/message: defined
'message ' as 'Group '
Notice: Applied catalog in 0.01 seconds

18.
OrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrderingOrdering
• AAAAAAAAAAAAAAAAAlways the same order
• PPPPPPPPPPPPPPPPPuppet 3.x: based on title-hash
• PPPPPPPPPPPPPPPPPuppet 4.x: order seen in the manifest

19.
Puppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 orderingPuppet 4 ordering
• TTTTTTTTTTTTTTTTTime saver
• """""""""""""""""Hides" complexity
• AAAAAAAAAAAAAAAAAlign with other languages
• SSSSSSSSSSSSSSSSStill supports Require, Notify, …
• """""""""""""""""real" dependencies should still be
explicitely set (e.g cron job only installed if
packages is installed)

20.
(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types(Native) Data Types
Licensed under a Creative Commons Attribution 2.0 License
https://www.flickr.com/photos/ionics/6338281766

21.
Data types are not newData types are not newData types are not newData types are not newData types are not newData types are not newData types are not newData types are not newData types are not newData types are not newData types are not newData types are not newData types are not newData types are not newData types are not newData types are not newData types are not new
• PPPPPPPPPPPPPPPPPreviously included in stdlib, 3rd party
module
• ssssssssssssssssstdlib contains functions to convert data
types, check data types
• NNNNNNNNNNNNNNNNNothing in Puppet Core
• DDDDDDDDDDDDDDDDDifficult to check the type of all the
parameters

22.
Data TypesData TypesData TypesData TypesData TypesData TypesData TypesData TypesData TypesData TypesData TypesData TypesData TypesData TypesData TypesData TypesData Types
String
Numeric: Integer, Float
Boolean
Array
Hash
Regexp
Undef
Catalogentry: Class, Resource

23.
StringStringStringStringStringStringStringStringStringStringStringStringStringStringStringStringString
String Any string
String[2] Any string with at least 2 characters
String[0,2] A string with at most 2 characters
String[4,6] A string with at least 4 and at most 6 characters
String[5,5] A string with 5 characters
Convert to string with: "${myvariable}"

24.
NumericNumericNumericNumericNumericNumericNumericNumericNumericNumericNumericNumericNumericNumericNumericNumericNumeric
Numeric Float or integer
Numeric[-1,1] Float or Integer between -1 and 1 (incl)
Integer Any integer (from −∞ to ∞)
Integer[0] Positive Integer
Integer[default, 0] Negative Integer
Integer[-1,1] Integer between -1 and 1 (incl)
Float Floating point number
Float[-3,3.14] Float between -3 and 3.14 (incl)
Convert to Integer with the scanf function or 0+$variable

25.
HashHashHashHashHashHashHashHashHashHashHashHashHashHashHashHashHash
Hash
A Hash (key, value pairs)
Hash[String, String]
Hash with String as keys and values
Hash[String, Integer]
String as keys, Integer as values
Hash[String, Integer, 1]
Non empty hash
Hash[String, Integer, default, 5]
Hash with at most 5 entries

26.
ArrayArrayArrayArrayArrayArrayArrayArrayArrayArrayArrayArrayArrayArrayArrayArrayArray
Array
An array (list)
Array[String]
Array with String
Array[String, 1]
Non empty Array
Array[String, default, 5]
Array with at most 5 entries

27.
UndefUndefUndefUndefUndefUndefUndefUndefUndefUndefUndefUndefUndefUndefUndefUndefUndef
Eventually! A clear type for Undef (was very
confusing in the past: nil? string? symbol?)

28.
Abstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data TypesAbstract Data Types
Licensed under a Creative Commons Attribution 2.0 License
https://www.flickr.com/photos/webtreatsetc/4666231979

29.
OptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptional
Optional[String]: String or Undef
Optional[Integer]: Integer or Undef

30.
NotUndefNotUndefNotUndefNotUndefNotUndefNotUndefNotUndefNotUndefNotUndefNotUndefNotUndefNotUndefNotUndefNotUndefNotUndefNotUndefNotUndef
Everything but Undef.
NotUndef[Data]: Anything that matches
Data but not Undef.
Example: [Undef]

31.
VariantVariantVariantVariantVariantVariantVariantVariantVariantVariantVariantVariantVariantVariantVariantVariantVariant
Variant[Integer, String]: An
Integer or a String

32.
PatternPatternPatternPatternPatternPatternPatternPatternPatternPatternPatternPatternPatternPatternPatternPatternPattern
Pattern[Regex, Regex]: Strings match
regexes

33.
EnumEnumEnumEnumEnumEnumEnumEnumEnumEnumEnumEnumEnumEnumEnumEnumEnum
Enum["true", "false"]: "true" or
"false" (strings)

34.
TupleTupleTupleTupleTupleTupleTupleTupleTupleTupleTupleTupleTupleTupleTupleTupleTuple
Tuple[Integer, String]: An array
like [1, "a"]

35.
StructStructStructStructStructStructStructStructStructStructStructStructStructStructStructStructStruct
Advanced hash.
Struct[{"username" => String,
"uid" => Integer[0]}]
Matches {"username" => "tux", "uid"
=> 1}

36.
ScalarScalarScalarScalarScalarScalarScalarScalarScalarScalarScalarScalarScalarScalarScalarScalarScalar
Same as Variant[Numeric, String,
Boolean, Regex]

37.
DataDataDataDataDataDataDataDataDataDataDataDataDataDataDataDataData
Same as Variant[Scalar, Undef,
Array[Data], Hash[Scalar,
Variant[Data]]

38.
AnyAnyAnyAnyAnyAnyAnyAnyAnyAnyAnyAnyAnyAnyAnyAnyAny
Anything

39.
Playing with typesPlaying with typesPlaying with typesPlaying with typesPlaying with typesPlaying with typesPlaying with typesPlaying with typesPlaying with typesPlaying with typesPlaying with typesPlaying with typesPlaying with typesPlaying with typesPlaying with typesPlaying with typesPlaying with types
Licensed under a Creative Commons Attribution 2.0 License
https://www.flickr.com/photos/jdhancock/7439512656

40.
Types in conditionsTypes in conditionsTypes in conditionsTypes in conditionsTypes in conditionsTypes in conditionsTypes in conditionsTypes in conditionsTypes in conditionsTypes in conditionsTypes in conditionsTypes in conditionsTypes in conditionsTypes in conditionsTypes in conditionsTypes in conditionsTypes in conditions
# Comparison
i f $m =~ Boolean {
$manage = $m
} e l s i f $m !~ Enum [ ’ t r u e ’ , ’ f a l s e ’ ] {
f a i l ( ’ Bad v a l u e ’ )
}

41.
Types in case statementsTypes in case statementsTypes in case statementsTypes in case statementsTypes in case statementsTypes in case statementsTypes in case statementsTypes in case statementsTypes in case statementsTypes in case statementsTypes in case statementsTypes in case statementsTypes in case statementsTypes in case statementsTypes in case statementsTypes in case statementsTypes in case statements
case $user {
I n t e g e r : { $uid = $user }
Boolean : { $ c r e a t e = $user }
d e f a u l t : { f a i l ( ’ Bad Data Type ’ ) }
}

42.
Types in parametersTypes in parametersTypes in parametersTypes in parametersTypes in parametersTypes in parametersTypes in parametersTypes in parametersTypes in parametersTypes in parametersTypes in parametersTypes in parametersTypes in parametersTypes in parametersTypes in parametersTypes in parametersTypes in parameters
class p r o f i l e _ m y s q l (
Boolean $manage_service,
Enum [ ’ mysql ’ , ’ mariadb ’ ] $service_name,
Optional [ S t r i n g [ 8 ] ] $root_password,
) {
}

43.
Type checkingType checkingType checkingType checkingType checkingType checkingType checkingType checkingType checkingType checkingType checkingType checkingType checkingType checkingType checkingType checkingType checking
# NOT CORRECT:
S t r i n g $runmode = $ f a c t s [ ’ runmode ’ ]
# Corre ct :
$runmode = a s s e r t _ t y p e ( S t r i n g , $ f a c t s [ ’
runmode ’ ] )

44.
Array, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash mergeArray, Hash merge
Licensed under a Creative Commons Attribution 2.0 License
https://www.flickr.com/photos/willmx/2295022876

45.
HashesHashesHashesHashesHashesHashesHashesHashesHashesHashesHashesHashesHashesHashesHashesHashesHashes
$mascot1 = { ’ l i n u x ’ => ’ tux ’ }
$mascot2 = { ’ bsd ’ => ’ b e a s t i e ’ }
$mascots = $mascot1 + $mascot2
# { ’ l i n u x ’ => ’ tux ’ , ’ bsd ’ => ’ b e a s t i e ’ }

46.
ArraysArraysArraysArraysArraysArraysArraysArraysArraysArraysArraysArraysArraysArraysArraysArraysArrays
$ d i s t r o = [ ’ Larry ’ , ’ Geeko ’ ]
$misc = [ ’ b l i n k y ’ , ’ f r e d ’ ]
$ a l l = $ d i s t r o + $misc
# [ ’ Larry ’ , ’ Geeko ’ , ’ b l i n k y ’ , ’ f r e d ’ ]

47.
MergesMergesMergesMergesMergesMergesMergesMergesMergesMergesMergesMergesMergesMergesMergesMergesMerges
• NNNNNNNNNNNNNNNNNo more need for stdlib
• CCCCCCCCCCCCCCCCCleaner code

48.
FunctionsFunctionsFunctionsFunctionsFunctionsFunctionsFunctionsFunctionsFunctionsFunctionsFunctionsFunctionsFunctionsFunctionsFunctionsFunctionsFunctions
Licensed under a Creative Commons Attribution 2.0 License
https://www.flickr.com/photos/zzpza/3269784239

49.
Puppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 Function
# http :// puppet−on−the−edge . blogspot . se
Puppet : : Functions . c r e a t e _ f u n c t i o n ( : min ) do
d i s p a t c h : min do
param ’ Numeric ’ , : a
param ’ Numeric ’ , : b
end
def min ( x , y )
x <= y ? x : y
end
end

50.
Puppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 FunctionPuppet 4 Function
# http :// puppet−on−the−edge . blogspot . se
Puppet : : Functions . create_function ( : min) do
dispatch : min do
param ’ Numeric ’ , : a
param ’ Numeric ’ , : b
end
dispatch : min_s do
param ’ String ’ , : s1
param ’ String ’ , : s2
end
def min(x , y)
x <= y ? x : y
end
def min_s(x , y)
cmp = (x . downcase <=> y . downcase )
cmp <= 0 ? x : y
end
end

51.
Loops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functionsLoops and new built-in functions
Licensed under a Creative Commons Attribution-ShareAlike 2.0 License
https://www.flickr.com/photos/squeaks2569/8114399667

52.
Loops: ArrayLoops: ArrayLoops: ArrayLoops: ArrayLoops: ArrayLoops: ArrayLoops: ArrayLoops: ArrayLoops: ArrayLoops: ArrayLoops: ArrayLoops: ArrayLoops: ArrayLoops: ArrayLoops: ArrayLoops: ArrayLoops: Array
class vh o s t s ( Array [ S t r i n g ] $packages, ) {
$packages . each | S t r i n g $package | {
package {
” vhost−${package} ” :
ensure => p r e s e n t ,
}
}
}

53.
Loops: HashLoops: HashLoops: HashLoops: HashLoops: HashLoops: HashLoops: HashLoops: HashLoops: HashLoops: HashLoops: HashLoops: HashLoops: HashLoops: HashLoops: HashLoops: HashLoops: Hash
class vhosts (Hash[String, String] $packages,){
$packages.each | String $package, String $version | {
package {
"vhost−${package}":
ensure => $version,
}
}
}

54.
Loops: reduceLoops: reduceLoops: reduceLoops: reduceLoops: reduceLoops: reduceLoops: reduceLoops: reduceLoops: reduceLoops: reduceLoops: reduceLoops: reduceLoops: reduceLoops: reduceLoops: reduceLoops: reduceLoops: reduce
$total = reduce([1,2,3]) |$result, $value| {
$result + $value
}
# $total = 6

55.
with: "private" scopewith: "private" scopewith: "private" scopewith: "private" scopewith: "private" scopewith: "private" scopewith: "private" scopewith: "private" scopewith: "private" scopewith: "private" scopewith: "private" scopewith: "private" scopewith: "private" scopewith: "private" scopewith: "private" scopewith: "private" scopewith: "private" scope
# ’ p r i v a t e ’ v a r i a b l e s
with ( ’ ldap ’ , ’ s e c r e t ’ ) | $ u s e r , $password | {
f i l e {
’ / etc / s e c r e t s ’ :
content => ” ${user} : $ { s e c r e t } ” ,
}
}

56.
filterfilterfilterfilterfilterfilterfilterfilterfilterfilterfilterfilterfilterfilterfilterfilterfilter
class vhosts (Hash[String, String] $packages,){
$packages.filter | String $package, String $version |
{
$version != 'latest'
}.each | String $package, String $version | {
package {
"vhost−${package}":
ensure => $version,
}
}
}

57.
access resource parametersaccess resource parametersaccess resource parametersaccess resource parametersaccess resource parametersaccess resource parametersaccess resource parametersaccess resource parametersaccess resource parametersaccess resource parametersaccess resource parametersaccess resource parametersaccess resource parametersaccess resource parametersaccess resource parametersaccess resource parametersaccess resource parameters
class vhosts (Hash[String, String] $packages,){
$packages.filter | String $package, String $version |
{
$version != 'latest'
}.each | String $package, String $version | {
package {
"vhost−${package}":
ensure => $version,
}
}
$foo_version = Package["foo"]["version"]
}

58.
ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)ruby-style . syntax (chaining)
$a = join(['foo', 'bar'], ',')
$b = ['foo', 'bar'].join(',')

59.
HEREDOCHEREDOCHEREDOCHEREDOCHEREDOCHEREDOCHEREDOCHEREDOCHEREDOCHEREDOCHEREDOCHEREDOCHEREDOCHEREDOCHEREDOCHEREDOCHEREDOC
# HEREDOC
$longstring = @(EOM)
This item is managed by Puppet
EOM
# Remove tabs
$longstring_notabs = @(EOM)
This item is managed by Puppet
| EOM
# Remove new lines + trailing line
$longstring_nonewline = @(EOM)
This item is managed by
Puppet
|− EOM
# Syntax check
$longstring_nonewline = @(EOM:json)
["This item is managed by Puppet"]
|− EOM

60.
TemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplates
Licensed under a Creative Commons Attribution 2.0 License
https://www.flickr.com/photos/mrbill/3267227227

61.
TemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplatesTemplates
• CCCCCCCCCCCCCCCCCan be written in Puppet Code (EPP)
• GGGGGGGGGGGGGGGGGets their own variables
• OOOOOOOOOOOOOOOOOnly useful since the new DSL
• fffffffffffffffffunction epp and inline_epp

62.
EPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templates
f i l e {
’ pt−heartbeat −c o n f i g ’ :
show_diff => f a l s e ,
content => epp ( ’ pth / pth . epp ’ , {
database => $ d a t a b a s e ,
socket => $ s o c k e t ,
u s e r => $ u s e r ,
password => $password,
} ) ,
}

63.
EPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templatesEPP templates
<%− |
S t r i n g $database ,
S t r i n g $password ,
S t r i n g $socket ,
S t r i n g $user ,
| −%>
u s e r=<%= $user %>
password=<%= $password %>
socket=<%= $socket %>
database=<%= $database %>
host=l o c a l h o s t
create −t a b l e

64.
All-in-One packageAll-in-One packageAll-in-One packageAll-in-One packageAll-in-One packageAll-in-One packageAll-in-One packageAll-in-One packageAll-in-One packageAll-in-One packageAll-in-One packageAll-in-One packageAll-in-One packageAll-in-One packageAll-in-One packageAll-in-One packageAll-in-One package
Licensed under a Creative Commons Attribution 2.0 License
https://www.flickr.com/photos/creative_tools/5299374697

65.
All-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: FactsAll-in-One package: Facts
• AAAAAAAAAAAAAAAAAll the client is in one RPM
• RRRRRRRRRRRRRRRRRepository is called PC1
• PPPPPPPPPPPPPPPPPuppet Collection 1
• pppppppppppppppppuppet-agent RPM contains ruby and all the
deps
• EEEEEEEEEEEEEEEEEverything is under /etc/puppetlabs,
/opt/puppetlabs, …

66.
All-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: ProsAll-in-One package: Pros
• EEEEEEEEEEEEEEEEEveryone gets the same ruby version
• OOOOOOOOOOOOOOOOOne RPM, one repository
• EEEEEEEEEEEEEEEEEverything can be optimized
• OOOOOOOOOOOOOOOOOnly one version to check for consistency

67.
All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)All-in-One package: Cons (1/2)
• NNNNNNNNNNNNNNNNNot rebuildable (toolchain
(ezbake/vanagon) not released/not
open-source)
• PPPPPPPPPPPPPPPPPL can patch Ruby, preventing people that
use other methods to get the same
behaviour
• WWWWWWWWWWWWWWWWWe are dependent on PL for updates (e.g
OpenSSL)
• HHHHHHHHHHHHHHHHHidden version numbers (Puppet-agent
version is semantic but abstract)
• NNNNNNNNNNNNNNNNNot reusing shared libs

68.
All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)All-in-One package: Cons (2/2)
• HHHHHHHHHHHHHHHHHow can we guess such paths?
/opt/puppetlabs/puppet/cache should
have been at least
/var/opt/puppetlabs/puppet

69.
Batteries includedBatteries includedBatteries includedBatteries includedBatteries includedBatteries includedBatteries includedBatteries includedBatteries includedBatteries includedBatteries includedBatteries includedBatteries includedBatteries includedBatteries includedBatteries includedBatteries included
• HHHHHHHHHHHHHHHHHiera, Augeas
• FFFFFFFFFFFFFFFFFacter, CFacter
• MMMMMMMMMMMMMMMMMcollective
• OOOOOOOOOOOOOOOOOpenSSL
• RRRRRRRRRRRRRRRRRuby and gem dependencies

70.
The case of FedoraThe case of FedoraThe case of FedoraThe case of FedoraThe case of FedoraThe case of FedoraThe case of FedoraThe case of FedoraThe case of FedoraThe case of FedoraThe case of FedoraThe case of FedoraThe case of FedoraThe case of FedoraThe case of FedoraThe case of FedoraThe case of Fedora
• FFFFFFFFFFFFFFFFFedora 23 ships Puppet 4
• NNNNNNNNNNNNNNNNNOT using the AIO package
• MMMMMMMMMMMMMMMMMight be rebuilt one day for EL

71.
Migration and stuffMigration and stuffMigration and stuffMigration and stuffMigration and stuffMigration and stuffMigration and stuffMigration and stuffMigration and stuffMigration and stuffMigration and stuffMigration and stuffMigration and stuffMigration and stuffMigration and stuffMigration and stuffMigration and stuff
Licensed under a Creative Commons Attribution-ShareAlike 2.0 License
https://www.flickr.com/photos/photos/26116471@N03/6362329323

72.
PuppetserverPuppetserverPuppetserverPuppetserverPuppetserverPuppetserverPuppetserverPuppetserverPuppetserverPuppetserverPuppetserverPuppetserverPuppetserverPuppetserverPuppetserverPuppetserverPuppetserver
• AAAAAAAAAAAAAAAAA Puppet master written in clojure
• RRRRRRRRRRRRRRRRRuns on top of a jvm
• PPPPPPPPPPPPPPPPPut it behind a reverse proxy
• SSSSSSSSSSSSSSSSSlow start but better performances
• NNNNNNNNNNNNNNNNNot much to say, it stays out of my way so
it's good
• PPPPPPPPPPPPPPPPPuppetserver 2.1 is compatible with Puppet
3 and 4 clients

73.
Prepare yourselfPrepare yourselfPrepare yourselfPrepare yourselfPrepare yourselfPrepare yourselfPrepare yourselfPrepare yourselfPrepare yourselfPrepare yourselfPrepare yourselfPrepare yourselfPrepare yourselfPrepare yourselfPrepare yourselfPrepare yourselfPrepare yourself
• UUUUUUUUUUUUUUUUUpdate to latest Puppet 3.x
• UUUUUUUUUUUUUUUUUse the Future parser
• UUUUUUUUUUUUUUUUUpdate to latest Puppetserver

74.
Update your clientsUpdate your clientsUpdate your clientsUpdate your clientsUpdate your clientsUpdate your clientsUpdate your clientsUpdate your clientsUpdate your clientsUpdate your clientsUpdate your clientsUpdate your clientsUpdate your clientsUpdate your clientsUpdate your clientsUpdate your clientsUpdate your clients
• hhhhhhhhhhhhhhhhhttps://github.com/puppetlabs/puppetlabs-
puppet_agent
• DDDDDDDDDDDDDDDDDo not forget to edit your cronjobs (change
PATH to /usr/bin:/opt/puppetlabs/bin)
• pppppppppppppppppuppet will be in /opt/puppetlabs/bin

75.
Everything is not there yetEverything is not there yetEverything is not there yetEverything is not there yetEverything is not there yetEverything is not there yetEverything is not there yetEverything is not there yetEverything is not there yetEverything is not there yetEverything is not there yetEverything is not there yetEverything is not there yetEverything is not there yetEverything is not there yetEverything is not there yetEverything is not there yet
• PPPPPPPPPPPPPPPPPuppetboard and Foreman does not work
yet (new PuppetDB API)
• GGGGGGGGGGGGGGGGGood news: Puppetexplorer does (I have not
tested)

76.
ConclusionConclusionConclusionConclusionConclusionConclusionConclusionConclusionConclusionConclusionConclusionConclusionConclusionConclusionConclusionConclusionConclusion
Licensed under a Creative Commons Attribution-ShareAlike 2.0 License
https://www.flickr.com/photos/olivierpechenet/19824185788

77.
Good job :-)Good job :-)Good job :-)Good job :-)Good job :-)Good job :-)Good job :-)Good job :-)Good job :-)Good job :-)Good job :-)Good job :-)Good job :-)Good job :-)Good job :-)Good job :-)Good job :-)
• GGGGGGGGGGGGGGGGGood job, Puppetlabs (and community)
• TTTTTTTTTTTTTTTTThe new DSL was a hard work
• IIIIIIIIIIIIIIIIIt works well
• IIIIIIIIIIIIIIIII have seen only minor bugs
• IIIIIIIIIIIIIIIIIt is still a lot backward-compatible (with
clean code…)
• PPPPPPPPPPPPPPPPPlease open-source the toolchain

78.
Regarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSLRegarding the new DSL
• AAAAAAAAAAAAAAAAA lot of new powers
• IIIIIIIIIIIIIIIIIt's a language
• TTTTTTTTTTTTTTTTTime to write new recommendations, best
practices
• IIIIIIIIIIIIIIIIIt can look awesome or horrible
• PPPPPPPPPPPPPPPPPuppet lint and code review to the rescue!

79.
Is it time to move?Is it time to move?Is it time to move?Is it time to move?Is it time to move?Is it time to move?Is it time to move?Is it time to move?Is it time to move?Is it time to move?Is it time to move?Is it time to move?Is it time to move?Is it time to move?Is it time to move?Is it time to move?Is it time to move?
• IIIIIIIIIIIIIIIIIf you have a test environment, yes
• OOOOOOOOOOOOOOOOOtherwise I would still wait for more
bugfixes
• BBBBBBBBBBBBBBBBBut we are already at 4.2.1
• YYYYYYYYYYYYYYYYYou should a least prepare yourself
• IIIIIIIIIIIIIIIII recommend
github.com/theforeman/puppet-puppet to
manage puppet

80.
The new DSLThe new DSLThe new DSLThe new DSLThe new DSLThe new DSLThe new DSLThe new DSLThe new DSLThe new DSLThe new DSLThe new DSLThe new DSLThe new DSLThe new DSLThe new DSLThe new DSL
• WWWWWWWWWWWWWWWWWill not be everywhere
• AAAAAAAAAAAAAAAAA lot of stuff could be done with stdlib
• FFFFFFFFFFFFFFFFFirst in roles, profiles, node manifests
• WWWWWWWWWWWWWWWWWaiting for PL to decomission 3.x for the
rest
• MMMMMMMMMMMMMMMMMaybe we will see puppet4-only modules
(but is that what we want?)

81.
Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4Puppet 4
• FFFFFFFFFFFFFFFFFull of new features
• NNNNNNNNNNNNNNNNNow has a powerful DSL
• SSSSSSSSSSSSSSSSStays declarative
• IIIIIIIIIIIIIIIIIs more predictive

82.
Any Question?Any Question?Any Question?Any Question?Any Question?Any Question?Any Question?Any Question?Any Question?Any Question?Any Question?Any Question?Any Question?Any Question?Any Question?Any Question?Any Question?

83.
BioBioBioBioBioBioBioBioBioBioBioBioBioBioBioBioBio
• hhhhhhhhhhhhhhhhhttp://puppet-on-the-edge.blogspot.com/
• hhhhhhhhhhhhhhhhhttps://www.devco.net/
• hhhhhhhhhhhhhhhhhttp://docs.puppetlabs.com/

84.
ContactContactContactContactContactContactContactContactContactContactContactContactContactContactContactContactContact
Julien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien PivottoJulien Pivotto
julien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eujulien@inuits.eu
@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie@roidelapluie
inuitsinuitsinuitsinuitsinuitsinuitsinuitsinuitsinuitsinuitsinuitsinuitsinuitsinuitsinuitsinuitsinuits
https://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.euhttps://inuits.eu
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+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636+32 473 441 636