The Core Types Cheat Sheet at
http://projects.puppetlabs.com/projects/puppet/wiki/Core_Types_Cheat_Sheet/
says:
The Trifecta
Package/file/service: Learn it, live it, love it. If you can only do this,
you can still do a lot.
package { ''openssh-server'':
ensure => installed,
}
file { ''/etc/ssh/sshd_config'':
source => ''puppet:///modules/sshd/sshd_config'',
owner => ''root'',
group => ''root'',
mode => ''640'',
notify => Service[''sshd''], # sshd will restart
whenever you edit this file.
require => Package[''openssh-server''],
}
service { ''sshd'':
ensure => running,
enable => true,
hasstatus => true,
hasrestart => true,
}
I can see two problems with this example, and rather than open a ticket I
wanted to make sure I haven''t overlooked something.
1. Is there any special magic requiring that the config file exist before
Puppet starts the sshd service?
If not, shouldn''t there be a requires in the service on the config
file?
2. The sentence "sshd will restart whenever you edit this file." is a
bit
confusing, because it hints at puppet using some kind of inotify mechanism
to restart sshd when the config file changes.
Would it be better to write that sshd will restart whenever puppet updates
this file?
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On Fri, Mar 16, 2012 at 9:21 AM, jimbob palmer <jimbobpalmer@gmail.com> wrote:> The Core Types Cheat Sheet at > http://projects.puppetlabs.com/projects/puppet/wiki/Core_Types_Cheat_Sheet/ > says: > > > The Trifecta > > Package/file/service: Learn it, live it, love it. If you can only do this, > you can still do a lot. > > package { ''openssh-server'': > ensure => installed, > } > > file { ''/etc/ssh/sshd_config'': > source => ''puppet:///modules/sshd/sshd_config'', > owner => ''root'', > group => ''root'', > mode => ''640'', > notify => Service[''sshd''], # sshd will restart whenever you edit this > file.This ensures order and trigger service restart when the file resource changes.> require => Package[''openssh-server''], > } > > service { ''sshd'': > ensure => running, > enable => true, > hasstatus => true, > hasrestart => true, > } > > > > I can see two problems with this example, and rather than open a ticket I > wanted to make sure I haven''t overlooked something. > > 1. Is there any special magic requiring that the config file exist before > Puppet starts the sshd service? > If not, shouldn''t there be a requires in the service on the config file?The notify implies the order and triggers refresh on changes.> 2. The sentence "sshd will restart whenever you edit this file." is a bit > confusing, because it hints at puppet using some kind of inotify mechanism > to restart sshd when the config file changes. > Would it be better to write that sshd will restart whenever puppet updates > this file?Yes, it would make mores precise to say when the user update the config (in the module), and run puppet to update the file, it will trigger a service restart as well. Nan -- You received this message because you are subscribed to the Google Groups "Puppet Users" group. To post to this group, send email to puppet-users@googlegroups.com. To unsubscribe from this group, send email to puppet-users+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/puppet-users?hl=en.
On Mar 16, 2012, at 10:21 AM, jimbob palmer wrote:> The Core Types Cheat Sheet at http://projects.puppetlabs.com/projects/puppet/wiki/Core_Types_Cheat_Sheet/ says: > > > The Trifecta > > Package/file/service: Learn it, live it, love it. If you can only do this, you can still do a lot. > > package { ''openssh-server'': > ensure => installed, > } > > file { ''/etc/ssh/sshd_config'': > source => ''puppet:///modules/sshd/sshd_config'', > owner => ''root'', > group => ''root'', > mode => ''640'', > notify => Service[''sshd''], # sshd will restart whenever you edit this file. > require => Package[''openssh-server''], > } > > service { ''sshd'': > ensure => running, > enable => true, > hasstatus => true, > hasrestart => true, > } > > > I can see two problems with this example, and rather than open a ticket I wanted to make sure I haven''t overlooked something. > > 1. Is there any special magic requiring that the config file exist before Puppet starts the sshd service? > If not, shouldn''t there be a requires in the service on the config file?A notify relationship sets up a resource chain, just as a requires does. A resource with a notify attribute will always be managed before its notify target and a resource with a requires attribute will always be managed after its require target.> 2. The sentence "sshd will restart whenever you edit this file." is a bit confusing, because it hints at puppet using some kind of inotify mechanism to restart sshd when the config file changes. > Would it be better to write that sshd will restart whenever puppet updates this file?Puppet will restart the sshd on its next run even if you''ve changed the config file locally. Prior to restarting the service, though, Puppet will have undone your local edits. -- Peter M. Bukowinski Sr. Systems Engineer Janelia Farm Research Campus, HHMI -- You received this message because you are subscribed to the Google Groups "Puppet Users" group. To post to this group, send email to puppet-users@googlegroups.com. To unsubscribe from this group, send email to puppet-users+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/puppet-users?hl=en.
On 16.3.2012 15:21, jimbob palmer wrote:> The Core Types Cheat Sheet at > http://projects.puppetlabs.com/projects/puppet/wiki/Core_Types_Cheat_Sheet/ > says: > > > The Trifecta > > Package/file/service: Learn it, live it, love it. If you can only do > this, you can still do a lot. > > |package { ''openssh-server'': > ensure => installed, > } > > file { ''/etc/ssh/sshd_config'': > source => ''puppet:///modules/sshd/sshd_config'', > owner => ''root'', > group => ''root'', > mode => ''640'', > notify => Service[''sshd''], # sshd will restart whenever you edit this file. > require => Package[''openssh-server''], > } > > service { ''sshd'': > ensure => running, > enable => true, > hasstatus => true, > hasrestart => true, > } > | > > > > I can see two problems with this example, and rather than open a ticket > I wanted to make sure I haven''t overlooked something. > > 1. Is there any special magic requiring that the config file exist > before Puppet starts the sshd service? > If not, shouldn''t there be a requires in the service on the config file?According to the http://docs.puppetlabs.com/references/stable/metaparameter.html#notify there is magic, namely the implicit ''before''. ...snip References to one or more objects that depend on this object. This parameter is the opposite of subscribe — it creates a dependency relationship like before, and also causes the dependent object(s) to be refreshed when this object is changed snap... but i remember vaguely that magic did not work for me not so long ago. hmm. -- Kind Regards, Markus Falb