getting started puppet manifest

getting started puppet manifest

1) check the default resources list for puppet.

cmd :
puppet resource [-h|--help] [-d|--debug] [-v|--verbose] [-e|--edit] [-p|--param parameter] [-t|--types] [-y|--to_yaml] type [name] [attribute=value ...]

REF : puppet

command : puppet resources --types

output :

augeas,computer,cron,exec,file,filebucket,group,host,interface,k5login,macauthorization,mailalias,maillist,mcx,mount,nagios_command
nagios_contact,nagios_contactgroup,nagios_host,nagios_hostdependency,nagios_hostescalation,nagios_hostextinfo,nagios_hostgroup,
nagios_service,nagios_servicedependency,nagios_serviceescalation,nagios_serviceextinfo,nagios_servicegroup,nagios_timeperiod
notify,package,resources,router,schedule,scheduled_task,selboolean,selmodule,service,ssh_authorized_key,sshkey,stage,tidy,user
vlan,whit,yumrepo,zfs,zone,zpool.

2) here in puppet, program are called as manifest.
ex : root.pp.

3) class can be defined as the resuseable component, can be called/used from any where.

def :

class classname {

puppet code

}

start puppet and check states of users

1)  start the puppet master.

cmd : systemctl start puppet

check process running on linux.
cmd : top (http://www.cyberciti.biz/faq/show-all-running-processes-in-linux/)

How to check processor and cpu details on Linux
cmd : lscpu
----------------------'
1) puppet will tell state of user.
cmd : puppet resource user root.

output :

user { 'root':
  ensure           => 'present',
  comment          => 'root',
  gid              => '0',
  home             => '/root',
  password         => '!!!!!!',
  password_max_age => '99999',
  password_min_age => '0',
  shell            => '/bin/bash',
  uid              => '12',
}
2) change state of shell command from bash to sh.
a) create a mnifest of the root user.

cmd : sudo puppet resource user root > root.pp

b) save and open the manifest file.

user { 'root':
  ensure           => 'present',
  comment          => 'root',
  gid              => '0',
  home             => '/root',
  password         => '!!!!!!',
  password_max_age => '99999',
  password_min_age => '0',
  shell            => '/bin/sh',
  uid              => '12',
}

c) apply the manifest

puppet apply root.pp

d) now check state of the user again.

cmd : puppet resource user root.

user { 'root':
  ensure           => 'present',
  comment          => 'root',
  gid              => '0',
  home             => '/root',
  password         => '!!!!!!',
  password_max_age => '99999',
  password_min_age => '0',
  shell            => '/bin/sh',
  uid              => '12',
}


3) now if we want to just simulate and dont want to change the state.

cmd :

a) vim root.pp

user { 'root':
  .
  .
  shell            => '/bin/bash',
  .
}
b) puppet apply root.pp  --noop (it show what all the changes might happen to the state if we use it)

REF  :
1) note there is not much of difference in bash/sh
2) puppet