To explain the background behind my question
We have a number of situations where it would be great if I could have
puppet automatically maintain a symlink for a resource such as the Java JVM.
For example - we install the JDK in /usr/java so after the RPM install, the
path to the JVM is /usr/java/jdk1.5.0_16. In order to simplify application
configuration, I like to make JAVA_HOME something generic like
/usr/java/java. I do this by creating a symlink
ln -s /usr/java/jdk1.5.0_16/ /usr/java/java
I would like to have puppet maintain the symlink so that when YUM updates
the JVM, the symlink gets updated as well. I know I could do this in the RPM
or using exec but that sounds like too much work:)
Just for fun I tried to setup a file type in puppet to create the symlink
using a wildcard. I did not expect this to work given the need for shell
expansion.
file { "/usr/java/java":
ensure => "/usr/java/jdk1.*"
}
Is their another way to do this in the puppet framework? I can do this using
exec, but I wanted to work from within puppet first.
Thanks for any ideas
Ed
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On Tue, May 12, 2009 at 8:16 AM, Edward Bailey <eds.mailing.list.account@gmail.com> wrote:> To explain the background behind my question > > We have a number of situations where it would be great if I could have > puppet automatically maintain a symlink for a resource such as the Java JVM. > > For example - we install the JDK in /usr/java so after the RPM install, the > path to the JVM is /usr/java/jdk1.5.0_16. In order to simplify application > configuration, I like to make JAVA_HOME something generic like > /usr/java/java. I do this by creating a symlink > > ln -s /usr/java/jdk1.5.0_16/ /usr/java/java > > I would like to have puppet maintain the symlink so that when YUM updates > the JVM, the symlink gets updated as well. I know I could do this in the RPM > or using exec but that sounds like too much work:) > > Just for fun I tried to setup a file type in puppet to create the symlink > using a wildcard. I did not expect this to work given the need for shell > expansion. > > file { "/usr/java/java": > ensure => "/usr/java/jdk1.*" > } > > Is their another way to do this in the puppet framework? I can do this using > exec, but I wanted to work from within puppet first.So if you write a fact that is your jdk path, you could then use it in your manifests: file { "/usr/java/java": ensure => symlink, replace => true target => $jdk_path, } That would seem to be the simplest option. -- Nigel Kersten nigelk@google.com System Administrator Google, Inc. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
I think you picked a bad example :) Java installs a symlink /usr/java/latest which points to (surprise!) the latest version that is installed. Or maybe this is a Java 1.6 thing in which case you might want to accelerate your migration Edward Bailey wrote:> To explain the background behind my question > > We have a number of situations where it would be great if I could have > puppet automatically maintain a symlink for a resource such as the > Java JVM. > > For example - we install the JDK in /usr/java so after the RPM > install, the path to the JVM is /usr/java/jdk1.5.0_16. In order to > simplify application configuration, I like to make JAVA_HOME something > generic like /usr/java/java. I do this by creating a symlink > > ln -s /usr/java/jdk1.5.0_16/ /usr/java/java > > I would like to have puppet maintain the symlink so that when YUM > updates the JVM, the symlink gets updated as well. I know I could do > this in the RPM or using exec but that sounds like too much work:) > > Just for fun I tried to setup a file type in puppet to create the > symlink using a wildcard. I did not expect this to work given the need > for shell expansion. > > file { "/usr/java/java": > ensure => "/usr/java/jdk1.*" > } > > Is their another way to do this in the puppet framework? I can do this > using exec, but I wanted to work from within puppet first. > > Thanks for any ideas > > Ed > > > >-- Trevor Hemsley Infrastructure Engineer ................................................. * C A L Y P S O * Brighton, UK OFFICE +44 (0) 1273 666 350 FAX +44 (0) 1273 666 351 ................................................. www.calypso.com This electronic-mail might contain confidential information intended only for the use by the entity named. If the reader of this message is not the intended recipient, the reader is hereby notified that any dissemination, distribution or copying is strictly prohibited. * P * /*/ Please consider the environment before printing this e-mail /*/ --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
I wish I could upgrade to 1.6. We just upgraded to the 1.5 jdk. The rpms I have do not create a symlink. Thanks! Sent from my iPhone On May 12, 2009, at 11:34 AM, Trevor Hemsley <trevor.hemsley@codefarm.com > wrote:> > I think you picked a bad example :) > > Java installs a symlink /usr/java/latest which points to (surprise!) > the > latest version that is installed. > > Or maybe this is a Java 1.6 thing in which case you might want to > accelerate your migration > > Edward Bailey wrote: >> To explain the background behind my question >> >> We have a number of situations where it would be great if I could >> have >> puppet automatically maintain a symlink for a resource such as the >> Java JVM. >> >> For example - we install the JDK in /usr/java so after the RPM >> install, the path to the JVM is /usr/java/jdk1.5.0_16. In order to >> simplify application configuration, I like to make JAVA_HOME >> something >> generic like /usr/java/java. I do this by creating a symlink >> >> ln -s /usr/java/jdk1.5.0_16/ /usr/java/java >> >> I would like to have puppet maintain the symlink so that when YUM >> updates the JVM, the symlink gets updated as well. I know I could do >> this in the RPM or using exec but that sounds like too much work:) >> >> Just for fun I tried to setup a file type in puppet to create the >> symlink using a wildcard. I did not expect this to work given the >> need >> for shell expansion. >> >> file { "/usr/java/java": >> ensure => "/usr/java/jdk1.*" >> } >> >> Is their another way to do this in the puppet framework? I can do >> this >> using exec, but I wanted to work from within puppet first. >> >> Thanks for any ideas >> >> Ed >> >> >>> > > -- > > Trevor Hemsley > Infrastructure Engineer > ................................................. > * C A L Y P S O > * Brighton, UK > > OFFICE +44 (0) 1273 666 350 > FAX +44 (0) 1273 666 351 > > ................................................. > www.calypso.com > > This electronic-mail might contain confidential information intended > only for the use by the entity named. If the reader of this message is > not the intended recipient, the reader is hereby notified that any > dissemination, distribution or copying is strictly prohibited. > > * P * /*/ Please consider the environment before printing this e- > mail /*/ > > > >--~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
That''s a really good idea. Thanks for sharing. Ed Sent from my iPhone On May 12, 2009, at 11:23 AM, Nigel Kersten <nigelk@google.com> wrote:> > On Tue, May 12, 2009 at 8:16 AM, Edward Bailey > <eds.mailing.list.account@gmail.com> wrote: >> To explain the background behind my question >> >> We have a number of situations where it would be great if I could >> have >> puppet automatically maintain a symlink for a resource such as the >> Java JVM. >> >> For example - we install the JDK in /usr/java so after the RPM >> install, the >> path to the JVM is /usr/java/jdk1.5.0_16. In order to simplify >> application >> configuration, I like to make JAVA_HOME something generic like >> /usr/java/java. I do this by creating a symlink >> >> ln -s /usr/java/jdk1.5.0_16/ /usr/java/java >> >> I would like to have puppet maintain the symlink so that when YUM >> updates >> the JVM, the symlink gets updated as well. I know I could do this >> in the RPM >> or using exec but that sounds like too much work:) >> >> Just for fun I tried to setup a file type in puppet to create the >> symlink >> using a wildcard. I did not expect this to work given the need for >> shell >> expansion. >> >> file { "/usr/java/java": >> ensure => "/usr/java/jdk1.*" >> } >> >> Is their another way to do this in the puppet framework? I can do >> this using >> exec, but I wanted to work from within puppet first. > > So if you write a fact that is your jdk path, you could then use it in > your manifests: > > file { "/usr/java/java": > ensure => symlink, > replace => true > target => $jdk_path, > } > > That would seem to be the simplest option. > > > > -- > Nigel Kersten > nigelk@google.com > System Administrator > Google, Inc. > > >--~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---