I don't think I've made my problem clear. The issue is NOT how to
specify a version for a package. I know how to do that. And I know how
to use a define to do it as well.
The issue is that if I call the define from two different classes on the
same node, I get Duplicate errors. I also know how to make the define a
virtual resource, but then the problem is I don't know how to pass in
the version number when I do the realize.
How can I include the same package more then once on a host, with the
option of specifying the version to install on a module/class basis.
On 9/14/10 5:47 PM, Darren Chamberlain wrote:
I do this kind of thing in a few places, for things like different
or specific versions of mysql, tomcat, libraries, and so on. I use
a define to wrap this up, and the declare is called from within the
node defitions. A simplified example of our method:
define install ($version) {
package {
$name:
ensure => $version,
....
}
}
node foo {
install { "apache": version => "2.2.5" }
}
node bar {
install { "apache": version => "2.2.15" }
}
* Marc Zampetti<marc.zampetti at gmail.com> [2010/09/14 16:55]:
Basically, I'm trying to build modules that implement best practices
(the app-apache module), and then admins that need to build specific
apache instances just create a new module that inherits from the base
class and provides the information they need.
So, admin A wants to build apache server 1, and thus creates
app-apache-server1. They set the version of apache they need, any other
required information (like docroot, etc.), and add anything else
specific to that application.
Admin B wants to build apache server 2, and thus creates
app-apache-server2. They go through the same process as admin A.
Notice, there are no nodes in this discussion. Its all about defining an
application. Then its time to say which nodes that apps will run on. In
this case, I want a single node to run both apps. Whenever I try to do
that with Puppet, I keep getting duplicate errors related to the package.
All of this assumes that the appropriate coordination has occurred to
make sure that both app definitions. That means that they are both
trying to use the same version of the package, don't conflict with files
or ports, etc.
Also, I think I forgot to mention that I am using puppet 0.25.5.
Marc
On 9/14/10 4:39 PM, Silviu Paragina wrote:
On 14.09.2010 23:12, Marc Zampetti wrote:
I've been banging my head on this all day, and I cannot seem to
figure out how to do it.
I have a package for Apache HTTPd. I want to be able to specify the
exact version of the package to use for a particular installation.
And it is also possible that I want to have two separate modules
install the same package.
So, what I end up with is the following
class app-apache {
package { "apache" : ensure => installed, noop => true }
}
class app-apache-server1 inherits app-apache {
Package["apache"] {ensure => "2.2.15", noop => false}
}
class app-apache-server2 inherits app-apache {
Package["apache"] {ensure => "2.2.15", noop => false}
}
Basically, I have two servers configured. Now, it is possible that
both servers could end up on the same host, depending upon a number
of facters. When that happens, I get an error about not being able to
override the "ensure" method in app-apache-server2 because it was
already overridden in app-apache-server1.
Anyone have any ideas on how to do this? I need to be able to specify
the version I want for a particular class, and that can change from
class to class. I realize that if two different classes define two
different versions and both classes end up on the same node, I will
get errors from YUM. I'm ok with that.
Marc Zampetti
I don't see any way to do what you want directly. But in your
specific case you may add another level of inheritance, that specifies
the version, and inherit both of your classes from that, and you will
get an error from puppet for double override in that case. You
shouldn't feed much into yum as you might get an actual response in
package management...
As an alternative you may get the version from a variable for the
specified class, but this would leave you with somewhat of a nightmare
for double inclusion.
Leaving that aside what are you trying to do? What you are doing
doesn't seem right to me. Any code that uses copy/paste should be
refactored to call that common piece of code instead of the
programmer/admin doing a copy paste of that code.
Silviu
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