Module: DevLXC

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

Defined Under Namespace

Modules: CLI Classes: Cluster, Container, Server

Constant Summary collapse

VERSION = 
"1.4.0"

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 121

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 98

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_dns_record(api_fqdn, container_name, ipaddress) ⇒ Object 



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# File 'lib/dev-lxc.rb', line 105

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

.create_platform_image(platform_image_name, lxc_config_path = '/var/lib/lxc') ⇒ Object 



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

def self.create_platform_image(platform_image_name, lxc_config_path='/var/lib/lxc')
  platform_image = DevLXC::Container.new(platform_image_name, lxc_config_path)
  if platform_image.defined?
    puts "Using existing platform image '#{platform_image.name}'"
    return platform_image
  end
  puts "Creating platform image '#{platform_image.name}'"
  case platform_image.name
  when "p-ubuntu-1004"
    platform_image.create("download", "btrfs", {}, 0, ["-d", "ubuntu", "-r", "lucid", "-a", "amd64"])
  when "p-ubuntu-1204"
    platform_image.create("download", "btrfs", {}, 0, ["-d", "ubuntu", "-r", "precise", "-a", "amd64"])
  when "p-ubuntu-1404"
    platform_image.create("download", "btrfs", {}, 0, ["-d", "ubuntu", "-r", "trusty", "-a", "amd64"])
  when "p-ubuntu-1504"
    platform_image.create("download", "btrfs", {}, 0, ["-d", "ubuntu", "-r", "vivid", "-a", "amd64"])
  when "p-centos-5"
    platform_image.create("centos", "btrfs", {}, 0, ["-R", "5"])
  when "p-centos-6"
    platform_image.create("download", "btrfs", {}, 0, ["-d", "centos", "-r", "6", "-a", "amd64"])
  when "p-centos-7"
    platform_image.create("download", "btrfs", {}, 0, ["-d", "centos", "-r", "7", "-a", "amd64"])
    # Centos 7 needs setpcap capabilities
    # ref: https://bugzilla.redhat.com/show_bug.cgi?id=1176816
    # ref: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1339781
    # ref: http://vfamilyserver.org/blog/2015/05/centos-7-lxc-container-slow-boot/
    DevLXC.search_file_replace(platform_image.config_file_name, /centos.common.conf/, 'fedora.common.conf')
    platform_image.clear_config
    platform_image.load_config
  end
  unless platform_image.config_item("lxc.mount.auto").nil?
    platform_image.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 '#{platform_image.name}' platform image's lxc.network.0.hwaddr to #{hwaddr}"
  platform_image.set_config_item("lxc.network.0.hwaddr", hwaddr)
  platform_image.save_config
  platform_image.start
  puts "Installing packages in platform image '#{platform_image.name}'"
  case platform_image.name
  when "p-ubuntu-1004"
    # Disable certain sysctl.d files in Ubuntu 10.04, they cause `start procps` to fail
    if File.exist?("#{platform_image.config_item('lxc.rootfs')}/etc/sysctl.d/10-console-messages.conf")
      FileUtils.mv("#{platform_image.config_item('lxc.rootfs')}/etc/sysctl.d/10-console-messages.conf",
                   "#{platform_image.config_item('lxc.rootfs')}/etc/sysctl.d/10-console-messages.conf.orig")
    end
    platform_image.run_command("apt-get update")
    platform_image.run_command("apt-get install -y standard^ server^ vim-nox emacs23-nox curl tree openssh-server")
    IO.write("#{platform_image.config_item('lxc.rootfs')}/etc/rc.local", "#!/usr/bin/env bash\n\n/usr/sbin/dpkg-reconfigure openssh-server\n")
    FileUtils.chmod(0755, "#{platform_image.config_item('lxc.rootfs')}/etc/rc.local")
  when "p-ubuntu-1204", "p-ubuntu-1404"
    platform_image.run_command("apt-get update")
    platform_image.run_command("apt-get install -y standard^ server^ vim-nox emacs23-nox tree openssh-server")
    IO.write("#{platform_image.config_item('lxc.rootfs')}/etc/rc.local", "#!/usr/bin/env bash\n\n/usr/sbin/dpkg-reconfigure openssh-server\n")
    FileUtils.chmod(0755, "#{platform_image.config_item('lxc.rootfs')}/etc/rc.local")
  when "p-ubuntu-1504"
    platform_image.run_command("apt-get update")
    # install policykit-1 first Ref: https://bugs.launchpad.net/ubuntu/+source/policykit-1/+bug/1447654/
    platform_image.run_command("apt-get install -y policykit-1")
    platform_image.run_command("apt-get install -y standard^ server^ vim-nox emacs24-nox tree openssh-server")
    IO.write("#{platform_image.config_item('lxc.rootfs')}/etc/rc.local", "#!/usr/bin/env bash\n\n/usr/sbin/dpkg-reconfigure openssh-server\n")
    FileUtils.chmod(0755, "#{platform_image.config_item('lxc.rootfs')}/etc/rc.local")
  when "p-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/
    platform_image.run_command("yum downgrade -y openssl")
    platform_image.run_command("yum install -y @base @core vim-enhanced emacs-nox tree openssh-server")
    FileUtils.mkdir_p("#{platform_image.config_item('lxc.rootfs')}/etc/sudoers.d")
    FileUtils.chmod(0750, "#{platform_image.config_item('lxc.rootfs')}/etc/sudoers.d")
    append_line_to_file("#{platform_image.config_item('lxc.rootfs')}/etc/sudoers", "\n#includedir /etc/sudoers.d\n")
  when "p-centos-6"
    platform_image.run_command("yum install -y @base @core vim-enhanced emacs-nox tree openssh-server")
  when "p-centos-7"
    platform_image.run_command("yum install -y @base @core vim-enhanced emacs-nox tree openssh-server")
  end
  platform_image.run_command("useradd --create-home --shell /bin/bash --password $6$q3FDMpMZ$zfahCxEWHbzuEV98QPzhGZ7fLtGcLNZrbKK7OAYGXmJXZc07WbcxVnDwrMyX/cL6vSp4/IjlrVUZFBp7Orhyu1 dev-lxc")

  FileUtils.mkdir_p("#{platform_image.config_item('lxc.rootfs')}/home/dev-lxc/.ssh")
  FileUtils.chmod(0700, "#{platform_image.config_item('lxc.rootfs')}/home/dev-lxc/.ssh")
  FileUtils.touch("#{platform_image.config_item('lxc.rootfs')}/home/dev-lxc/.ssh/authorized_keys")
  FileUtils.chmod(0600, "#{platform_image.config_item('lxc.rootfs')}/home/dev-lxc/.ssh/authorized_keys")
  platform_image.run_command("chown -R dev-lxc:dev-lxc /home/dev-lxc/.ssh")

  IO.write("#{platform_image.config_item('lxc.rootfs')}/etc/sudoers.d/dev-lxc", "dev-lxc   ALL=NOPASSWD:ALL\n")
  FileUtils.chmod(0440, "#{platform_image.config_item('lxc.rootfs')}/etc/sudoers.d/dev-lxc")
  platform_image.stop
  return platform_image
end

.reload_dnsmasq ⇒ Object 



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# File 'lib/dev-lxc.rb', line 113

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 117

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 128

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