98 lines
2.7 KiB
Ruby
98 lines
2.7 KiB
Ruby
module VagrantPlugins
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module GuestRedHat
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module Cap
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class ChangeHostName
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def self.change_host_name(machine, name)
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new(machine, name).change!
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end
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attr_reader :machine, :new_hostname
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def initialize(machine, new_hostname)
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@machine = machine
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@new_hostname = new_hostname
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end
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def change!
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return unless should_change?
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update_sysconfig
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update_hostname
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update_etc_hosts
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update_dhcp_hostnames
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restart_networking
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end
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def should_change?
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new_hostname != current_hostname
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end
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def current_hostname
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@current_hostname ||= get_current_hostname
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end
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def get_current_hostname
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hostname = ''
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block = lambda do |type, data|
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if type == :stdout
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hostname += data.chomp
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end
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end
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execute 'hostname -f', error_check: false, &block
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execute 'hostname',&block if hostname.empty?
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/localhost(\..*)?/.match(hostname) ? '' : hostname
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end
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def update_sysconfig
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sudo "sed -i 's/\\(HOSTNAME=\\).*/\\1#{fqdn}/' /etc/sysconfig/network"
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end
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def update_hostname
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sudo "hostname #{fqdn}"
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end
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# /etc/hosts should resemble:
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# 127.0.0.1 host.fqdn.com host localhost ...
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def update_etc_hosts
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s = '[[:space:]]'
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current_fqdn = Regexp.escape(current_hostname)
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current_short = Regexp.escape(current_hostname.split('.').first.to_s)
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currents = "\\(#{current_fqdn}#{s}\\+\\|#{current_short}#{s}\\+\\)*" unless current_hostname.empty?
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local_ip = '127[.]0[.]0[.]1'
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search = "^\\(#{local_ip}#{s}\\+\\)#{currents}"
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replace = "\\1#{fqdn} "
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replace = "#{replace}#{short_hostname} " unless fqdn == short_hostname
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expression = ['s', search, replace,''].join('@')
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sudo "sed -i '#{expression}' /etc/hosts"
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end
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def update_dhcp_hostnames
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sudo "sed -i 's/\\(DHCP_HOSTNAME=\\).*/\\1\"#{short_hostname}\"/' /etc/sysconfig/network-scripts/ifcfg-*"
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end
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def restart_networking
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sudo 'service network restart'
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end
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def fqdn
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new_hostname
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end
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def short_hostname
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new_hostname.split('.').first
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end
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def execute(cmd, opts=nil, &block)
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machine.communicate.execute(cmd, opts, &block)
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end
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def sudo(cmd, opts=nil, &block)
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machine.communicate.sudo(cmd, opts, &block)
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end
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end
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end
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end
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end
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