guests/redhat: Change host name in one command
This commit is contained in:
Seth Vargo
parent
665534e620
commit
b91c167b19
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@ -3,104 +3,38 @@ module VagrantPlugins
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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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comm = machine.communicate
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attr_reader :machine, :new_hostname
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if !comm.test("hostname -f | grep -w '#{name}'", sudo: false)
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basename = name.split('.', 2)[0]
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comm.sudo <<-EOH.gsub(/^ {14}/, '')
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# Update sysconfig
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sed -i 's/\\(HOSTNAME=\\).*/\\1#{name}/' /etc/sysconfig/network
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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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# Update DNS
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sed -i 's/\\(DHCP_HOSTNAME=\\).*/\\1\"#{basename}\"/' /etc/sysconfig/network-scripts/ifcfg-*
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def change!
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return unless should_change?
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# Set the hostname - use hostnamectl if available
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echo '#{name}' > /etc/hostname
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if command -v hostnamectl; then
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hostnamectl set-hostname '#{name}'
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else
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hostname '#{name}'
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fi
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case machine.guest.capability("flavor")
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when :rhel_7
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update_hostname_rhel7
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update_etc_hosts
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else
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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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# Remove comments and blank lines from /etc/hosts
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sed -i'' -e 's/#.*$//' -e '/^$/d' /etc/hosts
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# Prepend ourselves to /etc/hosts
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grep -w '#{name}' /etc/hosts || {
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sed -i'' '1i 127.0.0.1\\t#{name}\\t#{basename}' /etc/hosts
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}
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# Restart network
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service network restart
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EOH
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end
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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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def update_hostname_rhel7
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sudo "hostnamectl set-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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@ -1,70 +1,42 @@
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require File.expand_path("../../../../../base", __FILE__)
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require File.expand_path("../../../support/shared/redhat_like_host_name_examples", __FILE__)
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require_relative "../../../../base"
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describe "VagrantPlugins::GuestRedHat::Cap::ChangeHostName" do
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let(:described_class) do
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VagrantPlugins::GuestRedHat::Plugin.components.guest_capabilities[:redhat].get(:change_host_name)
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let(:caps) do
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VagrantPlugins::GuestRedHat::Plugin
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.components
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.guest_capabilities[:redhat]
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end
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let(:machine) { double("machine") }
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let(:communicator) { VagrantTests::DummyCommunicator::Communicator.new(machine) }
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let(:guest) { double("guest") }
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let(:comm) { VagrantTests::DummyCommunicator::Communicator.new(machine) }
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before do
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allow(guest).to receive(:capability).and_return(nil)
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allow(machine).to receive(:communicate).and_return(communicator)
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allow(machine).to receive(:guest).and_return(guest)
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communicator.stub_command('hostname -f', stdout: old_hostname)
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communicator.expect_command('hostname -f')
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allow(machine).to receive(:communicate).and_return(comm)
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end
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after do
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communicator.verify_expectations!
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comm.verify_expectations!
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end
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context 'when oldhostname is qualified' do
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let(:old_hostname) { 'oldhostname.olddomain.tld' }
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let(:similar_hostname) {'oldhostname'}
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describe ".change_host_name" do
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let(:cap) { caps.get(:change_host_name) }
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it_behaves_like 'a full redhat-like host name change'
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let(:name) { "banana-rama.example.com" }
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include_examples 'inserting hostname in /etc/hosts'
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include_examples 'swapping simple hostname in /etc/hosts'
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include_examples 'swapping qualified hostname in /etc/hosts'
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end
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it "sets the hostname" do
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comm.stub_command("hostname -f | grep -w '#{name}'", exit_code: 1)
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context 'when oldhostname is simple' do
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let(:old_hostname) { 'oldhostname' }
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let(:similar_hostname) {'oldhostname.olddomain.tld'}
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it_behaves_like 'a full redhat-like host name change'
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include_examples 'inserting hostname in /etc/hosts'
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include_examples 'swapping simple hostname in /etc/hosts'
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context 'and is only able to be determined by hostname (without -f)' do
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before do
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communicator.stub_command('hostname -f',nil)
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communicator.stub_command('hostname', stdout: old_hostname)
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communicator.expect_command('hostname')
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end
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it_behaves_like 'a full redhat-like host name change'
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include_examples 'inserting hostname in /etc/hosts'
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include_examples 'swapping simple hostname in /etc/hosts'
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cap.change_host_name(machine, name)
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expect(comm.received_commands[1]).to match(/\/etc\/sysconfig\/network/)
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expect(comm.received_commands[1]).to match(/\/etc\/sysconfig\/network-scripts\/ifcfg/)
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expect(comm.received_commands[1]).to match(/hostnamectl set-hostname '#{name}'/)
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expect(comm.received_commands[1]).to match(/service network restart/)
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end
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end
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context 'when the short version of hostname is localhost' do
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let(:old_hostname) { 'localhost.olddomain.tld' }
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it_behaves_like 'a partial redhat-like host name change'
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include_examples 'inserting hostname in /etc/hosts'
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it "does more even when the provided hostname is not different" do
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described_class.change_host_name(machine, old_hostname)
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expect(communicator.received_commands.to_set).not_to eq(communicator.expected_commands.keys.to_set)
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it "does not change the hostname if already set" do
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comm.stub_command("hostname -f | grep -w '#{name}'", exit_code: 0)
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cap.change_host_name(machine, name)
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expect(comm.received_commands.size).to eq(1)
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end
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end
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end
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