Module: DevLXC

Defined in:
lib/dev-lxc.rb,
lib/dev-lxc/version.rb,
lib/dev-lxc/container.rb,
lib/dev-lxc/chef-server.rb,
lib/dev-lxc/chef-cluster.rb

Defined Under Namespace

Modules: CLI Classes: ChefCluster, ChefServer, Container

Constant Summary collapse

VERSION = 
"0.2.4"

Class Method Summary collapse

Class Method Details

.append_line_to_file(file_name, line) ⇒ Object 



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# File 'lib/dev-lxc.rb', line 88

def self.append_line_to_file(file_name, line)
  content = IO.readlines(file_name)
  content[-1] = content[-1].chomp + "\n" unless content.empty?
  content << line
  IO.write(file_name, content.join)
end

.assign_ip_address(ipaddress, container_name, hwaddr) ⇒ Object 



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# File 'lib/dev-lxc.rb', line 65

def self.assign_ip_address(ipaddress, container_name, hwaddr)
  puts "Assigning IP address #{ipaddress} to #{container_name} container's lxc.network.hwaddr #{hwaddr}"
  search_file_delete_line("/etc/lxc/dhcp-hosts.conf", /(^#{hwaddr}|,#{ipaddress}$)/)
  append_line_to_file("/etc/lxc/dhcp-hosts.conf", "#{hwaddr},#{ipaddress}\n")
  reload_dnsmasq
end

.create_base_platform(base_platform_name) ⇒ Object 



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# File 'lib/dev-lxc.rb', line 9

def self.create_base_platform(base_platform_name)
  base_platform = DevLXC::Container.new(base_platform_name)
  if base_platform.defined?
    puts "Using existing container #{base_platform.name}"
    return base_platform
  end
  puts "Creating container #{base_platform.name}"
  case base_platform.name
  when "b-ubuntu-1004"
    base_platform.create("download", "btrfs", 0, ["-d", "ubuntu", "-r", "lucid", "-a", "amd64"])
  when "b-ubuntu-1204"
    base_platform.create("download", "btrfs", 0, ["-d", "ubuntu", "-r", "precise", "-a", "amd64"])
  when "b-ubuntu-1404"
    base_platform.create("download", "btrfs", 0, ["-d", "ubuntu", "-r", "trusty", "-a", "amd64"])
  when "b-centos-5"
    base_platform.create("centos", "btrfs", 0, ["-R", "5"])
  when "b-centos-6"
    base_platform.create("download", "btrfs", 0, ["-d", "centos", "-r", "6", "-a", "amd64"])
  end
  # TODO when LXC 1.0.2 is released and the following test is replaced with #config_item("lxc.mount.auto")
  # then this #save_config can be removed
  base_platform.save_config
  # TODO when LXC 1.0.2 is released the following test can be done using #config_item("lxc.mount.auto")
  unless IO.readlines(base_platform.config_file_name).select { |line| line.start_with?("lxc.mount.auto") }.empty?
    base_platform.set_config_item("lxc.mount.auto", "proc:rw sys:rw")
  end
  hwaddr = '00:16:3e:' + Digest::SHA1.hexdigest(Time.now.to_s).slice(0..5).unpack('a2a2a2').join(':')
  puts "Setting #{base_platform.name} container's lxc.network.0.hwaddr to #{hwaddr}"
  base_platform.set_config_item("lxc.network.0.hwaddr", hwaddr)
  base_platform.save_config
  base_platform.start
  puts "Installing packages in container #{base_platform.name}"
  case base_platform.name
  when "b-ubuntu-1004"
    # Disable certain sysctl.d files in Ubuntu 10.04, they cause `start procps` to fail
    if File.exist?("#{base_platform.config_item('lxc.rootfs')}/etc/sysctl.d/10-console-messages.conf")
      FileUtils.mv("#{base_platform.config_item('lxc.rootfs')}/etc/sysctl.d/10-console-messages.conf",
                   "#{base_platform.config_item('lxc.rootfs')}/etc/sysctl.d/10-console-messages.conf.orig")
    end
    base_platform.run_command("apt-get update")
    base_platform.run_command("apt-get install -y standard^ server^ vim-nox emacs23-nox curl tree")
  when "b-ubuntu-1204", "b-ubuntu-1404"
    base_platform.run_command("apt-get update")
    base_platform.run_command("apt-get install -y standard^ server^ vim-nox emacs23-nox tree")
  when "b-centos-5"
    # downgrade openssl temporarily to overcome an install bug
    # reference: http://www.hack.net.br/blog/2014/02/12/openssl-conflicts-with-file-from-package-openssl/
    base_platform.run_command("yum downgrade -y openssl")
    base_platform.run_command("yum install -y @base @core vim-enhanced emacs-nox tree")
  when "b-centos-6"
    base_platform.run_command("yum install -y @base @core vim-enhanced emacs-nox tree")
  end
  base_platform.stop
  return base_platform
end

.create_dns_record(api_fqdn, container_name, ipaddress) ⇒ Object 



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# File 'lib/dev-lxc.rb', line 72

def self.create_dns_record(api_fqdn, container_name, ipaddress)
  dns_record = "#{ipaddress} #{container_name} #{api_fqdn}\n"
  puts "Creating DNS record: #{dns_record}"
  search_file_delete_line("/etc/lxc/addn-hosts.conf", /^#{ipaddress}\s/)
  append_line_to_file("/etc/lxc/addn-hosts.conf", dns_record)
  reload_dnsmasq
end

.reload_dnsmasq ⇒ Object 



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# File 'lib/dev-lxc.rb', line 80

def self.reload_dnsmasq
  system("pkill -HUP dnsmasq")
end

.search_file_delete_line(file_name, regex) ⇒ Object 



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# File 'lib/dev-lxc.rb', line 84

def self.search_file_delete_line(file_name, regex)
  IO.write(file_name, IO.readlines(file_name).delete_if {|line| line.match(Regexp.new(regex))}.join)
end

.search_file_replace(file_name, regex, replace) ⇒ Object 



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# File 'lib/dev-lxc.rb', line 95

def self.search_file_replace(file_name, regex, replace)
  IO.write(file_name, IO.readlines(file_name).map {|line| line.gsub(Regexp.new(regex), replace)}.join)
end