managing debian alternatives

[lluis]

Hello,
there any reason not to configure debian alternatives this way?

file {
"/etc/alternatives/java":
ensure => "/usr/lib/jvm/java-6-sun/jre/bin/java";
}

appart from using non-free software

[Marc Fournier]

Hello,

> there any reason not to configure debian alternatives this way?
>
> file {
> "/etc/alternatives/java":
> ensure => "/usr/lib/jvm/java-6-sun/jre/bin/java";
> }

I do the same thing this way:

exec { "update-java-alternatives --set java-6-sun":
unless => 'test $(readlink /etc/alternatives/java) == "/usr/lib/jvm/java-6-sun/jre/bin/java"',
require => Package["sun-java6-bin"],
}

But for alternatives other than java, it probably is fine to do
as you describe.

Marc

[lluis]

thank you, I didn't know about update-java-alternatives

El dj 24 de 09 de 2009 a les 13:01 +0200, en/na Marc Fournier va
escriure:

[Russ Allbery]

lluis <ll...@ingent.net> writes:

> there any reason not to configure debian alternatives this way?

> file {
> "/etc/alternatives/java":
> ensure => "/usr/lib/jvm/java-6-sun/jre/bin/java";
> }

Yes, you won't modify any slaved alternatives, such as the man page. You
should always use update-alternatives rather than manipulating the file
system to change alternative selections.

--
Russ Allbery (r...@stanford.edu) <http://www.eyrie.org/~eagle/>

[daryl wiest]

Marc, or anyone still paying attention.

Sorry for the necro.

I am trying to something similar to 

exec { "update-java-alternatives --set java-6-sun":
  unless => 'test $(readlink /etc/alternatives/java) == "/usr/lib/jvm/java-6-sun/jre/bin/java"',
  require => Package["sun-java6-bin"],
}

 

I am using the jdk_oracle module (https://forge.puppetlabs.com/bcarpio/java_jdk or  puppet module install tylerwalts-jdk_oracle).  It runs the java and javac exec to apply the etc-alternates every single time puppet is run.  I tried to add the unless line to it's definition.  

 exec { "/usr/sbin/update-alternatives --install /usr/bin/java java ${java_home}/bin/java 20000":

   require => Exec['extract_jdk'],

   unless => "test $(readlink /etc/alternatives/java) == '${java_home}/bin/java'",

}

 With that definition, it still runs every single time.  While trying to debug what is going on, I moved the entire unless statement to a notify, and got the following output

Notice: /Stage[main]/Jdk_oracle/Notify[test $(readlink /etc/alternatives/java) == '/opt/jdk1.7.0_55/bin/java']/message: defined 'message' as 'test $(readlink /etc/alternatives/java) == '/opt/jdk1.7.0_55/bin/java''

  if I execute the readlink part of that line in my shell, I see the following.

$ readlink /etc/alternatives/java
/opt/jdk1.7.0_55/bin/java

Two questions... 

1. How can I debug what is going on with that statement?  making it an unless, it always runs, making it an onlyif, it never runs, so something is not working with the comparison.  Is there something different I should be using for the compare?  (tripple equals, contains, etc..)

2. How can I debug the value of the readlink statement (subshell execution?).  It doesn't work in notify.  I have tried assigning it to a value and then using notify, that didn't work either.  

Thanks for your help!

[Felix Frank]

On 08/29/2014 07:42 AM, daryl wiest wrote:
> 1. How can I debug what is going on with that statement? making it an
> unless, it always runs, making it an onlyif, it never runs, so
> something is not working with the

Try puppet agent --test --debug

> comparison. Is there something different I should be using for the
> compare? (tripple equals, contains, etc..)

Actually, test(1) does not even take double equals - string comparison
is done via a single = sign.

> 2. How can I debug the value of the readlink statement (subshell
> execution?). It doesn't work in notify. I have tried assigning it to
> a value and then using notify, that didn't work eith

You can try an additional exec.

exec { 'test foo = bar ; echo $?': logoutput => true }

HTH,
Felix