Augeas XML arrays

gistfile1.xml

# What I get
<configuration>
  <foo>
    <nodes>
      <node>
        <domainname>puppet-foobar.vm:7310</domainname>
      </node>
      <node>
        <domainname>d1.mynode.example.com</domainname>
      </node>
      <node>
        <domainname>a0.mybackupnode.example.com</domainname>
        <backup>true</backup>
      </node>
      <node>
        <domainname>a1.mybackupnode.example.com</domainname>
        <backup>true</backup>
      </node>
  </foo>
</configuration

# What I want
<configuration>
  <foo>
    <nodes>
      <node>
        <domainname>puppet-foobar.vm:7310</domainname>
      </node>
  </foo>
</configuration

Augeas code:
"set redirection/nodes/node[1]/domainname/#text %{::fqdn}:7310"