jcbollinger wrote:
> On Thursday, May 16, 2019 at 10:50:45 AM UTC-5, Helmut Schneider
> wrote:
>
> > I don't want to install netplan but if it exists do the needful:
>
> I reiterate Ben Ford's comments: This is generally considered an
> anti-pattern.
>
> It is better from an administrative perspective for you to know which
> systems are supposed to have netplan, and to unconditionally ensure
> that it is both installed and properly configured on those systems.
> You could go so far as to ensure it absent from other machines,
> though whether that's appropriate is a policy question whose answer
> will vary. In any case, it is not only reasonable but safer for all
> concerned to demand that the identities of machines for which you are
> going to manage netplan configuration be statically known to you.
I see your point and in 99% of my tasks with Puppet I agree.
> With that said, if you insist on treading this path anyway then a
> custom fact is indeed the right way to convey the wanted information
> to Puppet, whether that's the version of netplan that's installed, if
> any, or merely whether netplan is installed at all. For that you'll
> want either a fact specific to that purpose (e.g.
> $::netplan_version), or a more general fact from which you can glean
> the information (e.g. $::installed_packages). There is no way to
> parameterize a fact so that it has different meaning depending on how
> it is evaluated.
Nevertheless knowing what packages are installed might help me, too,
and although my ruby knowledge is very rudimentary here is some output:
#!/usr/bin/ruby
Facter.add('installed_packages') do
confine :osfamily => /freebsd|debian/
setcode do
begin
packages_hash = {}
if Facter.value(:osfamily) == 'Debian'
packages = Facter::Util::Resolution.exec('/usr/bin/dpkg -l |
/bin/grep ^ii | /usr/bin/awk \'{print $2"|"$3}\'')
elsif Facter.value(:osfamily) == 'FreeBSD'
packages = Facter::Util::Resolution.exec('/usr/sbin/pkg info |
/usr/bin/awk \'{print $1}\' | /usr/bin/sed -E
\'s#-([[:digit:]])#\|\1#g\'')
end
packages.each_line do |package|
if package
name,*version = package.chomp.split(/\|/)
packages_hash[name] = version.join("")
end
end
packages_hash
rescue
end
end
end
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