Add vm-info script to gather VM info

bin/vm-info

@@ -0,0 +1,74 @@
+#!/usr/bin/env ruby
+
+require "json"
+
+def read_os_id
+  return nil unless File.exist?("/etc/os-release")
+  File.readlines("/etc/os-release").each do |line|
+    if line =~ /^ID=(.+)$/
+      return $1.strip.delete('"').downcase
+    end
+  end
+  nil
+end
+
+def read_os_name
+  return nil unless File.exist?("/etc/os-release")
+  File.readlines("/etc/os-release").each do |line|
+    if line =~ /^PRETTY_NAME="(.+)"$/
+      return $1.strip.delete('"').downcase
+    end
+  end
+  nil
+end
+
+def ubuntu_updates
+  out = `apt-get -s -o Debug::NoLocking=true upgrade 2>/dev/null`
+  count = 0
+  out.each_line do |line|
+    count += 1 if line.start_with?("Inst ")
+  end
+  count
+end
+
+def ubuntu_reboot_pending
+  File.exist?("/var/run/reboot-required")
+end
+
+def alma_updates
+  out = `dnf -q check-update 2>/dev/null`
+  status = $?.exitstatus
+  return 0 if status == 0
+  return nil unless status == 100
+  count = 0
+  out.each_line do |line|
+    line = line.strip
+    next if line.empty?
+    next if line.start_with?("Obsoleting", "Last metadata")
+    count += 1 if line.split(/\s+/).size >= 3
+  end
+  count
+end
+
+def alma_reboot_pending
+  `dnf needs-restarting -r >/dev/null 2>&1`
+  $?.exitstatus == 1
+end
+
+result = {}
+if os = read_os_id
+  result["os"] = os
+end
+if os_name = read_os_name
+  result["os_name"] = os_name
+end
+case os
+when "ubuntu", "debian"
+  result["updates"] = ubuntu_updates
+  result["reboot_pending"] = ubuntu_reboot_pending
+when "almalinux", "rocky", "rhel", "centos", "fedora"
+  result["updates"] = alma_updates
+  result["reboot_pending"] = alma_reboot_pending
+end
+
+puts JSON.generate(result)