syslog-ng facter integration

hiera-data.yaml

---
syslog_ng::rewrite:
  r_sdata_facter:
    params:
      - set:
        - '"%{productname}"'
        - value: '".SDATA.facter.productname"'
      - set:
        - '"%{osfamily}"'
        - value: '".SDATA.facter.osfamily"'
      - set:
        - '"%{operatingsystem}"'
        - value: '".SDATA.facter.operatingsystem"'
      - set:
        - '"%{operatingsystemmajrelease}"'
        - value: '".SDATA.facter.operatingsystemmajrelease"'
      - set:
        - '"%{operatingsystemrelease}"'
        - value: '".SDATA.facter.operatingsystemrelease"'

resulting-syslog-ng.conf

rewrite r_sdata_facter {
    set(
        "OpenStack Nova",
        value(
            ".SDATA.facter.productname"
        )
    );
    set(
        "RedHat",
        value(
            ".SDATA.facter.osfamily"
        )
    );
    set(
        "CentOS",
        value(
            ".SDATA.facter.operatingsystem"
        )
    );
    set(
        "7",
        value(
            ".SDATA.facter.operatingsystemmajrelease"
        )
    );
    set(
        "7.1.1503",
        value(
            ".SDATA.facter.operatingsystemrelease"
        )
    );
};