feat: add ceph service management profiles and facts

Adds Unkin::Ceph::Utils facter module (ceph_services.rb) which detects
ceph service instances via systemctl and exposes is_ceph_mon, is_ceph_mgr,
is_ceph_mds, is_ceph_osd booleans and a ceph_services hash of unit names.

Adds profiles::ceph::mon, mgr, mds, osd — each with a Boolean $ensure_running
parameter that iterates discovered service instances and manages them as
running and enabled. Works across incus nodes (mon/mgr/mds/osd) and k8s
compute/control nodes (osd only).

💘 Generated with Crush

Assisted-by: Claude Sonnet 4.6 via Crush <crush@charm.land>

modules/libs/lib/facter/ceph_services.rb

@@ -0,0 +1,49 @@
+# frozen_string_literal: true
+
+require 'facter'
+
+# Detects active ceph service instances via systemctl and exposes facts
+# for use in ceph service management profiles.
+module Unkin::Ceph::Utils
+  TYPES = %w[mon mgr mds osd].freeze
+
+  def self.services
+    output = Facter::Core::Execution.execute(
+      'systemctl list-units "ceph*" --no-legend --plain --all 2>/dev/null',
+      on_fail: ''
+    )
+    parse_units(output)
+  end
+
+  def self.parse_units(output)
+    result = TYPES.each_with_object({}) { |type, hash| hash[type] = [] }
+    output.each_line do |line|
+      unit = line.split.first
+      next unless unit
+
+      match_unit(result, unit)
+    end
+    result
+  end
+
+  def self.match_unit(result, unit)
+    TYPES.each do |type|
+      match = unit.match(/\Aceph-#{type}@(.+)\.service\z/)
+      result[type] << "ceph-#{type}@#{match[1]}" if match
+    end
+  end
+
+  TYPES.each do |type|
+    define_singleton_method(:"#{type}?") { !services[type].empty? }
+  end
+end
+
+Facter.add('ceph_services') do
+  setcode { Unkin::Ceph::Utils.services }
+end
+
+Unkin::Ceph::Utils::TYPES.each do |type|
+  Facter.add("is_ceph_#{type}") do
+    setcode { Unkin::Ceph::Utils.public_send(:"#{type}?") }
+  end
+end

site/profiles/manifests/ceph/mds.pp

@@ -0,0 +1,13 @@
+class profiles::ceph::mds (
+  Boolean $ensure_running = true,
+) {
+
+  if $ensure_running and $facts['is_ceph_mds'] {
+    $facts['ceph_services']['mds'].each |String $svc| {
+      service { $svc:
+        ensure => running,
+        enable => true,
+      }
+    }
+  }
+}

site/profiles/manifests/ceph/mgr.pp

@@ -0,0 +1,13 @@
+class profiles::ceph::mgr (
+  Boolean $ensure_running = true,
+) {
+
+  if $ensure_running and $facts['is_ceph_mgr'] {
+    $facts['ceph_services']['mgr'].each |String $svc| {
+      service { $svc:
+        ensure => running,
+        enable => true,
+      }
+    }
+  }
+}

site/profiles/manifests/ceph/mon.pp

@@ -0,0 +1,13 @@
+class profiles::ceph::mon (
+  Boolean $ensure_running = true,
+) {
+
+  if $ensure_running and $facts['is_ceph_mon'] {
+    $facts['ceph_services']['mon'].each |String $svc| {
+      service { $svc:
+        ensure => running,
+        enable => true,
+      }
+    }
+  }
+}

site/profiles/manifests/ceph/osd.pp

@@ -0,0 +1,13 @@
+class profiles::ceph::osd (
+  Boolean $ensure_running = true,
+) {
+
+  if $ensure_running and $facts['is_ceph_osd'] {
+    $facts['ceph_services']['osd'].each |String $svc| {
+      service { $svc:
+        ensure => running,
+        enable => true,
+      }
+    }
+  }
+}