Site integral management with Puppet · Introduction PIC (Port d’Informació Científica) is a...
Transcript of Site integral management with Puppet · Introduction PIC (Port d’Informació Científica) is a...
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Site integral management with PuppetM. Caubet, A. Bria, X. Espinal
PIC (Port d'Informació Científica)
Barcelona (Spain)
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Index
1. Introduction
2. Puppet Architecture
3. Puppet Internals
4. Puppet in production: examples
5. Conclusions
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Introduction
● PIC (Port d’Informació Científica) is a data center of excellence for scientific-data processing.
● Current capacities: 4PB on disk, 3.5PB on tape and 3k cores● >600 servers and >70 diferent profiles
● Services group is composed by 8 people● Persons/services balance indicates:
● Clear need for centralized management tools● Target on automation
● Different tools evaluated since 2003, some basic (scripts) and some complex (quattor)
● In 2010 puppet was adopted as our central management tool.
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Introduction - Puppet Highlights
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● Offers a gradual integration● Declarative Language● Ensure an homogeneous environment (transversal configs)
● And service specific tuning on demand
● Runs over several O.S. platforms ● High flexibility for adapting new projects (new requirements)
● Deploy personalized modules● Quick benefits:
● decrease of the administration load● reduction of human administration errors● Rapid & reusable configuration
● Great community support
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Puppet Architecture - Services handled with puppet (100%)
GridFTPs
Core Servers
dCache Pools- Solaris- Linux
Tape Servers
Core Servers
F.T.S.
L.F.C.
W.N.
P.B.S. ...
C.E./CreamC.E.
Squid
Pakiti
N.F.S.
...
Enstore
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...and NON-CORESERVICES!
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Puppet Architecture
● Encrypted communication ● Agent receives a compiled catalog describing the desired
configuration● Puppet agent takes on the job to apply changes
(configurations) if needed6
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Puppet Architecture - Server Configuration
. . .clientclientclient
Mongrel
Puppet Server
Mongrel
Mongrel
Mongrel
● Default HTTP Server: Webbrick● SSL● No Load Balancing● Does not scale
● Puppet + Mongrel + Apache● SSL Manager (Apache)● Load Balancing (Apache)● Mongrel allows to run several
puppetmaster daemons
● SVN keeps code up2date● Change Control● Code update errors check
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Puppet Architecture - Change Control & Workflow
● Production SVN location: /etc/puppet● Services are served under the directory:
/etc/puppet/manifests/services/$module
– We configure which modules (services) we enable importing them at /etc/puppet/manifests/site.pp
● Syntax check on /etc/puppet.subversion before any SVN commit operation– Correct Syntax.: upload changes to /etc/puppet
– Wrong Syntax: rollback on /etc/puppet.subversion
SVN Server Prod/etc/puppet
SVN Server clone/etc/puppet.subversion
SVN checkoutClient
checksyntax
return “error”wrong syntax
rollback
syntax okSVN commit
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Puppet Architecture - Core vs. non-Core Services
● Puppet Server dedicated for non-Core services
● SVN sync● Common puppet basic profile
for all nodes hosted at pic● Service modules from Core
Puppet Server can be reused ● Non-core services users can
build their own modules
. . .
client
client
clientMongrel
Mongrel
Mongrel
Mongrel
. . .
client
client
client
Puppet Server for non-Core services
Mongrel
Mongrel
Mongrel
Mongrel
On SVN Change: synchronize
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Puppet Server for Core services
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Puppet Architecture - PIC streamlined machine installation system
● Installation is done via PXE.● Custom kickstart files are created by local script● Custom postinstall is added
● Adds local puppet repo● Installs desired puppet client version● Runs puppet against server
● The host wakes up configured and “linked” to puppet server● which is the case for every host at pic
Fast Disaster Recovery
Machine installed from the scratch in “one click”10
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Puppet Internals - Puppet Module (I)
● A Puppet module is a collection of:● resources● classes● files● definitions● templates
MODULE_PATH/ downcased_module_name/ files/ manifests/ init.pp lib/ puppet/ parser/ functions provider/ type/ facter/ templates/ README
resource
...
class
...
classresource
resource
resource resource
resource
...
init.pp
puppet native type
provider
puppet definition (function)
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Puppet Internals - Puppet Module (II)
class bacula_client {
package { 'bacula-client.$architecture':ensure => latest,alias => “bacula”,provider => yum,require => Repo[“sl55${architecture}.repo”];
}
file { “bacula-fd.conf”: # ... ; }
service { “bacula-fd”: # ... ; }}
resource
...
class
resource resource
init.pp
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Puppet Internals - Puppet Module (III)
class bacula_client {
package { 'bacula-client.$architecture':ensure => latest,alias => “bacula”,provider => yum,require => Repo[“sl55${architecture}.repo”];
}
file { “bacula-fd.conf”: # ... ; }
service { “bacula-fd”: # ... ; }}
resource
...
class
resource resource
init.pp
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Puppet Internals - Puppet Module (IV)
resource
...
class
resource resource
init.pp
package { 'bacula-client.$architecture':ensure => latest,alias => “bacula”,provider => yum,require => Repo[“sl55${architecture}.repo”];
}
Resource type
Puppet Native Resource
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Resource type
Puppet Internals - Puppet Module (V)
resource
...
class
resource resource
init.pp
package { 'bacula-client.$architecture':ensure => latest,alias => “bacula”,provider => yum,require => Repo[“sl55${architecture}.repo”];
}
Title/Resource name
Puppet Native Resource
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Puppet Internals - Puppet Module (VI)
resource
...
class
resource resource
init.pp
package { 'bacula-client.$architecture':ensure => latest,alias => “bacula”,provider => yum,require => Repo[“sl55${architecture}.repo”];
}
Attributes
Tittle/Resource nameResource type
Puppet Native Resource
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Puppet Internals - Puppet Module (VII)
resource
...
class
resource resource
init.pp
package { 'bacula-client.$architecture':ensure => latest,alias => “bacula”,provider => yum,require => Repo[“sl55${architecture}.repo”];
}
Attributes
Tittle/Resource nameResource type
Puppet Native Resource
Provider resource
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Puppet Internals - Puppet Module (VIII)
resource
...
class
resource resource
init.pp
package { 'bacula-client.$architecture':ensure => latest,alias => “bacula”,provider => yum,require => Repo[“sl55${architecture}.repo”];
}
Attributes
Tittle/Resource nameResource type
Puppet Native Resource
Provider resource
Dependency!!!
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Puppet in production: Ganglia Client example
What do we need?
groupganglia
userganglia
packageganglia-gmond
configuration filegmond.conf
configuration file templategmond.conf.erbor
servicegmond
class ganglia-gmondMODULE_PATH/ gangliaclient/ files/
etc/gmond.conf
manifests/ init.pp lib/ puppet/ parser/ functions provider/ type/ facter/ templates/
gmond.conf.erb README
init.pp
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Puppet in production: Ganglia Client example
class ganglia {
group { 'ganglia':
name => 'ganglia',
ensure => 'present',
gid => 200;
}
user { 'ganglia':
name => 'ganglia',
ensure => 'present',
uid => 200,
gid => 200,
home => '/var/lib/ganglia',
shell => '/sbin/nologin',
require => Group['ganglia'];
}
package { "ganglia-gmond.$architecture" : require => User[“Ganglia”]; }
file { '/etc/gmond.conf' :
content => template("common_ganglia/gmond.conf.erb"),
notify => Service["gmond"],
}
service { 'gmond':
name => 'gmond',
ensure => running,
require => Package["ganglia-gmond.$architecture"],
}
}
group
user
package
config file template
service
class ganglia-gmond
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Puppet in production: Ganglia Client example
templates/gmond.conf.erb/* Beggining of the file */
...
globals { setuid = yes user = nobody cleanup_threshold = 300}
cluster { name = "<%= cluster %>"}
udp_send_channel { mcast_join = <%= mcast_ip %> port = 8649 ttl = 5}
...
...
udp_recv_channel { mcast_join = <%= mcast_ip %> port = 8649 bind = <%= mcast_ip %>}
tcp_accept_channel { port = 8649}
...
/* End of the file */
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Puppet in production: YAIM module at pic
● Active● administrator triggers the node configuration with YAIM
● What do we need?gLite Repositories
gLite Packages
YAIM Configuration files
YAIM Node Configuration
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a
yum groupinstall(custom)
On PuppetLog Change
gLite repo
vo.d
services
nodes
site-info.def
MODULE_PATH/ yaim/ manifests/ init.pp lib/ puppet/ provider/
yumgrp.rb
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Puppet in production: YAIM module at pic
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# Base repository (same for updates and extras repositories)
yumrepo { "glite$glite-UI.repo": baseurl => "http://repo.pic.es/mrepo/glite-$glite-release-UI-$architecture/RPMS.base/", name => "glite-UI", descr => "gLite 3.2 UI service release repository", gpgkey => "http://glite.web.cern.ch/glite/glite_key_gd.asc", exclude => "maui maui-client", gpgcheck => 0, enabled => 1,}
a
yum groupinstall(custom)
On PuppetLog Change
gLite repo
vo.d
services
nodes
site-info.def
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Puppet in production: YAIM module at pic
a
yum groupinstall(custom)
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On PuppetLog Change
gLite repo
vo.d
services
nodes
site-info.def
package { "glite-UI":ensure => installed,
provider => yumgroupinstall, require => [ Class["common_yaimfiles"], Yumrepo["glite-UI"], ... ];}
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Puppet in production: YAIM module at pic
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file { '/opt/localconf/' : ensure => directory,
mode => 700 , recurse => true; # ... '/root/.subversion/auth/svn.simple/038204f6e0a3451cbdf1440fa00a6e10' : require => File['/root/.subversion/auth/svn.simple/'], content => '$SVN_PASSWORD'; }
exec { 'svn_check_out' : cwd => '/opt/localconf', command => 'svn co svn://ser01.pic.es/yaim_conf/gLite/', creates => '/opt/localconf/gLite/', require => File['localconf']; 'svn_update' : cwd => '/opt/localconf', command => 'svn up gLite', require => [ Exec['svn_check_out'],
File['/root/.subversion/auth/svn.simple/ 038204f6e0a3451cbdf1440fa00a6e10']]; }
a
yum groupinstall(custom)
On PuppetLog Change
gLite repo
vo.d
services
nodes
site-info.def
Secure gLite permisssions
Define SVN authentication
SVN update
SVN checkout
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Puppet in production: YAIM module at pic
a
yum groupinstall(custom)
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On PuppetLog Change
gLite repo
vo.d
services
nodes
site-info.def
define common_exec_yaim($common_yaim_environemnt,$yaim_meta) { exec { 'yaim_conf' : command => "/opt/glite/yaim/bin/yaim -c -s /opt/localconf/gLite/yaim/$common_yaim_environemnt/site-info.def $yaim_meta", unless => "tail -n1 /opt/glite/yaim/log/yaimlog|grep 'INFO: YAIM terminated succesfully'",
require => Package[“glite-UI”]; }}
common_exec_yaim { 'yaim_UI_pic' : common_yaim_environemnt => prod, yaim_meta => '-n glite-UI', notify => Class['pbsclient_conf'],}
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Puppet in production: YAIM module alternatives
ayum groupinstall
(custom)
gLite repo
vo.d
services
nodes
site-info.def
function
MODULE_PATH/ yaim/ files/
opt/yaim_prod/
site-info.def...vo.d/
atlas...
services/...
nodes/...
yaim_test/...
manifests/ init.pp lib/ puppet/ provider/
yumgrp.rb
● Passive● On configuration file update● Puppet inmediatly reconfigures the node with YAIM
● What do you need?gLite Repositories
gLite Packages
YAIM Configuration files
YAIM Node Configuration
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Puppet in production: YAIM module alternatives
ayum groupinstall
(custom)
gLite repo
vo.d
services
nodes
site-info.def
function
$yaim_location = "/opt/localconf/gLite/yaim/$common_yaim_environment"
File { ensure => directory, mode => 700, owner => root, group => root, }
file { # ... "${yaim_location}": require => File["/opt/localconf/gLite/yaim"] ; "${yaim_location}/vo.d": require => File["${yaim_location}"] ; "${yaim_location}/nodes": require => File["${yaim_location}"] ; "${yaim_location}/services": require => File["${yaim_location}"] ; }
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Puppet in production: YAIM module alternatives
ayum groupinstall
(custom)
gLite repo
vo.d
services
nodes
site-info.def
function
#### $yaim_location define yaim_base { file { "$name":
path => "${yaim_location}/${name}", source => "puppet://$pserver/opt/yaim_${environment}/${name}", require => File["${yaim_location}"], notify => Run_yaim_node[$yaim_nodetype];
}}yaim_base { [ "site-info.def", "users.conf", “groups.conf”, <...> , “edgusers.conf” ]: }
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Puppet in production: YAIM module alternatives
ayum groupinstall
(custom)
gLite repo
vo.d
services
nodes
site-info.def
function
#### $yaim_location/services ($yaim_location/nodes should be the same)define yaim_services { file { "$name": path => "${yaim_location}/services/${name}",
source => "puppet://$pserver/opt/yaim_${environment}/services/${name}", require => File["${yaim_location}/services"], notify => Run_yaim_node[$yaim_nodetype]; }}yaim_services { [ "glite-fta2" , "glite-fts2", <...>, "glite-creamce" ]: }
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Puppet in production: YAIM module alternatives
ayum groupinstall
(custom)
gLite repo
vo.d
services
nodes
site-info.def
function
#### $yaim_location/vo.ddefine yaim_vod { file { "$name": path => "${yaim_location}/vo.d/${name}",
source => "puppet://$pserver/opt/yaim_${environment}/vo.d/${name}", require => File["${yaim_location}/vo.d"], notify => Run_yaim_function_vomsdir[$yaim_nodetype]; }}
yaim_vod { [ "ops", "cms", "lhcb", "atlas", "dteam", "magic", <...> , "t2k.org" ]: }
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Puppet in production: YAIM module alternatives
ayum groupinstall
(custom)
gLite repo
vo.d
services
nodes
site-info.def
function
#### Run entire YAIM node configurationdefine run_yaim_node() { exec { "run_yaim_node_$name" : command => "/opt/glite/yaim/bin/yaim -c -s $yaim_location/site-info.def -n $name", refreshonly => true, }}run_yaim_node { $yaim_nodetype: }
### case "$nodetype" {### "fta":{ $yaim_nodetype = "FTA2" }### "fts":{ $yaim_nodetype = "FTS2" }### # ...### "wn": { $yaim_nodetype = [ "glite-WN",
"TORQUE_client",“glite-GLEXEC_wn" ] }### }
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Puppet in production: YAIM module alternatives
ayum groupinstall
(custom)
gLite repo
vo.d
services
nodes
site-info.def
function
#### Run a single YAIM function. Condition: service must have this functiondefine run_yaim_function_vomsdir() { case "$config_vomsdir" { "yes": { exec { "run_yaim_function_vomsdir_$name" : command => "/opt/glite/yaim/bin/yaim -r -s $yaim_location/site-info.def -f
config_vomsdir -n $name", refreshonly => true, } } }}run_yaim_function_vomsdir { $yaim_nodetype: }
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3. Conclusions
● Dramatic reduction in service administration loads
● Standardization of service profiles
● Possibility of full site homogeneization
● Fast disaster recovery capability when combined with streamlined
installation system (ie. kickstart)
● Time invested in maintaining a puppet infrastructure is negligible
when compared with the gain
● High flexibility, hence fast integration of new projects/requirements
● Abstraction level used allows sysadmins to deal with all services
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Backup Slides: Automation tools evaluation
Quattor cfEngine Puppet
Flexibility - + +
Config. Control +++ +++ +++Complexity +++ + +
Gradual Integration
+ ++ ++
Documentation + Support
+ ++ +++
Supported O.S. - ++ +
Execution Speed + ++ +