Only install timesync packages if needed

Chrony/NTP is only needed if timesync is requested. In some cases (like
containers) it never makes sense.

lib/beaker/host_prebuilt_steps.rb

@@ -10,22 +10,22 @@ module HostPrebuiltSteps
     NTPSERVER = 'pool.ntp.org'
     SLEEPWAIT = 5
     TRIES = 5
-    AMAZON2023_PACKAGES = %w[curl-minimal chrony]
-    RHEL8_PACKAGES = %w[curl chrony]
-    RHEL9_PACKAGES = ['chrony']
-    FEDORA_PACKAGES = %w[curl chrony]
-    UNIX_PACKAGES = %w[curl ntpdate]
+    AMAZON2023_PACKAGES = %w[curl-minimal]
+    RHEL8_PACKAGES = %w[curl]
+    RHEL9_PACKAGES = []
+    FEDORA_PACKAGES = %w[curl]
+    UNIX_PACKAGES = %w[curl]
     FREEBSD_PACKAGES = ['curl', 'perl5|perl']
     OPENBSD_PACKAGES = ['curl']
-    ARCHLINUX_PACKAGES = %w[curl ntp net-tools openssh]
+    ARCHLINUX_PACKAGES = %w[curl net-tools openssh]
     WINDOWS_PACKAGES = ['curl']
     PSWINDOWS_PACKAGES = []
     SLES10_PACKAGES = ['curl']
-    SLES_PACKAGES = %w[curl ntp]
-    DEBIAN_PACKAGES = %w[curl ntpdate lsb-release apt-transport-https]
-    CUMULUS_PACKAGES = %w[curl ntpdate]
-    SOLARIS10_PACKAGES = %w[CSWcurl CSWntp wget]
-    SOLARIS11_PACKAGES = %w[curl ntp]
+    SLES_PACKAGES = %w[curl]
+    DEBIAN_PACKAGES = %w[curl lsb-release apt-transport-https]
+    CUMULUS_PACKAGES = %w[curl]
+    SOLARIS10_PACKAGES = %w[CSWcurl wget]
+    SOLARIS11_PACKAGES = %w[curl]
     ETC_HOSTS_PATH = "/etc/hosts"
     ETC_HOSTS_PATH_SOLARIS = "/etc/inet/hosts"
     ROOT_KEYS_SCRIPT = "https://raw.githubusercontent.com/puppetlabs/puppetlabs-sshkeys/master/templates/scripts/manage_root_authorized_keys"
@@ -50,6 +50,7 @@ def timesync host, opts
           host.exec(Command.new("w32tm /resync"))
           logger.notify "NTP date succeeded on #{host}"
         else
+          # TODO: reuse logic form host_timesync_packages?
           if /amazon|el-[89]|fedora/.match?(host['platform'])
             ntp_command = "chronyc add server #{ntp_server} prefer trust;chronyc makestep;chronyc burst 1/2"
           elsif /opensuse-|sles-/.match?(host['platform'])
@@ -108,6 +109,16 @@ def validate_host host, opts
     # @param [Host] host A host return the packages for
     # @return [Array<String>] A list of packages to install
     def host_packages(host)
+      packages = host_base_packages(host)
+      packages += host_timesync_packages(host) if host[:timesync]
+      packages
+    end
+
+    # Return a list of packages that should be present.
+    #
+    # @param [Host] host A host return the packages for
+    # @return [Array<String>] A list of packages to install
+    def host_base_packages(host)
       case host['platform']
       when /amazon/
         AMAZON2023_PACKAGES
@@ -152,6 +163,27 @@ def host_packages(host)
       end
     end
 
+    # Return a list of packages that should be present for timesync.
+    #
+    # @param [Host] host A host return the packages for
+    # @return [Array<String>] A list of packages to install
+    def host_timesync_packages(host)
+      case host['platform']
+      when /amazon/, /el-[89]/, /fedora/
+        ['chrony']
+      when /freebsd/, /openbsd/, /sles-10/, /windows/, /aix|solaris|osx-|f5-|netscaler|cisco_/
+        []
+      when /archlinux/, /opensuse|sles-/, /solaris-1[1-9]/
+        ['ntp']
+      when /debian/, /cumulus/
+        'ntpdate'
+      when /solaris-10/
+        ['CSWntp']
+      else
+        ['ntpdate']
+      end
+    end
+
     # Installs the given packages if they aren't already on a host
     #
     # @param [Host] host Host to act on