GSI-HPC/sys-chef-cookbook

#
# Cookbook Name:: sys
# Recipe:: networkd
#
# Copyright 2017-2020 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH
#
# Authors:
#  Christopher Huhn   <c.huhn@gsi.de>
#  Matthias Pausch    <m.pausch@gsi.de>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

if node['platform_version'].to_i >= 9 && !node['sys']['networkd'].empty?

  delete = Dir.glob('/etc/systemd/network/*')
  keep = []

  if node['sys']['networkd']['link']
    node['sys']['networkd']['link'].keys.each do |name|
      number_prefix = ''
      unless name.match(/^[0-9]{2}-/)
        number_prefix = '00-'
      end
      keep << "#{number_prefix}#{name}.link"
    end
  end

  if node['sys']['networkd']['netdev']
    node['sys']['networkd']['netdev'].keys.each do |name|
      number_prefix = ''
      unless name.match(/^[0-9]{2}-/)
        number_prefix = '10-'
      end
      keep << "#{number_prefix}#{name}.netdev"
    end
  end

  if node['sys']['networkd']['network']
    node['sys']['networkd']['network'].keys.each do |name|
      number_prefix = ''
      unless name.match(/^[0-9]{2}-/)
        number_prefix = '20-'
      end
      keep << "#{number_prefix}#{name}.network"
    end
  end

  keep.map!{|e| "/etc/systemd/network/#{e}"}

  (delete - keep).each do |f|
    # TODO: shut down the corresponding systemd unit?
    file f do
      action :delete
      not_if { node['sys']['networkd']['keep_interfaces'] }
    end
  end

  if node['sys']['networkd']['link']
    node['sys']['networkd']['link'].each do |name, config|
      number_prefix = ''
      unless name.match(/^[0-9]{2}-/)
        number_prefix = '00-'
      end

      template "/etc/systemd/network/#{number_prefix}#{name}.link" do
        source "systemd_networkd_generic.erb"
        helpers(Sys::Harry)
        mode "0644"
        variables(:sections => config)
        notifies :restart, 'service[systemd-networkd]'
        # initramfs needs to be updated, when systemd.link-files change.
        notifies :run, 'execute[update-initramfs]'
      end
    end
  end

  if node['sys']['networkd']['netdev']
    node['sys']['networkd']['netdev'].each do |name, config|
      number_prefix = ''
      unless name.match(/^[0-9]{2}-/)
        number_prefix = '10-'
      end
      template "/etc/systemd/network/#{number_prefix}#{name}.netdev" do
        source "systemd_networkd_generic.erb"
        helpers(Sys::Harry)
        mode "0644"
        variables(:sections => config)
        notifies :restart, "service[systemd-networkd]"
      end
    end
  end

  if node['sys']['networkd']['network']
    node['sys']['networkd']['network'].each do |name, config|
      number_prefix = ''
      unless name.match(/^[0-9]{2}-/)
        number_prefix = '20-'
      end
      template "/etc/systemd/network/#{number_prefix}#{name}.network" do
        source "systemd_networkd_generic.erb"
        helpers(Sys::Harry)
        mode "0644"
        variables(:sections => config)
        notifies :restart, "service[systemd-networkd]"
      end
    end
  end

  service 'systemd-networkd' do
    supports :status => true, :restart => true
    action [:enable, :start]
  end

  # initramfs needs to be updated, when systemd.link-files change.
  execute 'update-initramfs' do
    action :nothing
    command 'update-initramfs -u'
    only_if { node['sys']['networkd']['link'] }
  end
end