Class: DevLXC::Server

Inherits:
Object
  • Object
show all
Defined in:
lib/dev-lxc/server.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, ipaddress, additional_fqdn, memory_per_server, mounts, ssh_keys) ⇒ Server

Returns a new instance of Server.



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# File 'lib/dev-lxc/server.rb', line 8

def initialize(name, ipaddress, additional_fqdn, memory_per_server, mounts, ssh_keys)
  @container = DevLXC::Container.new(name)
  @ipaddress = ipaddress
  @additional_fqdn = additional_fqdn
  @memory_per_server = memory_per_server
  @mounts = mounts
  @ssh_keys = ssh_keys
end

Instance Attribute Details

#container ⇒ Object (readonly)

Returns the value of attribute container.



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# File 'lib/dev-lxc/server.rb', line 6

def container
  @container
end

Instance Method Details

#assign_static_ip_address(hwaddr) ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 182

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

#destroy ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 146

def destroy
  return unless @container.defined?
  @container.snapshot_list.each { |snapshot| @container.snapshot_destroy(snapshot.first) }
  hwaddr = @container.config_item("lxc.network.0.hwaddr")
  @container.destroy
  remove_static_ip_address(hwaddr)
end

#install_package(package_path) ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 35

def install_package(package_path)
  @container.install_package(package_path)
end

#name ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 17

def name
  @container.name
end

#release_lingering_dhcp_ip_addresses(hwaddr) ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 154

def release_lingering_dhcp_ip_addresses(hwaddr)
  dhcp_leases = IO.readlines('/var/lib/misc/dnsmasq.lxcbr0.leases')
  leases_to_release = dhcp_leases.map do |dhcp_lease|
    if m = dhcp_lease.match(/ #{hwaddr} (\d+\.\d+\.\d+\.\d+) /)
      mac_addr = hwaddr
      ip_addr = m[1]
    elsif m = dhcp_lease.match(/ (\w\w:\w\w:\w\w:\w\w:\w\w:\w\w) #{@ipaddress} /)
      mac_addr = m[1]
      ip_addr = @ipaddress
    elsif m = dhcp_lease.match(/ (\w\w:\w\w:\w\w:\w\w:\w\w:\w\w) (\d+\.\d+\.\d+\.\d+) #{@container.name.sub(/\.lxc$/, '')} /)
      mac_addr = m[1]
      ip_addr = m[2]
    end
    if mac_addr && ip_addr
      { dhcp_lease: dhcp_lease, mac_addr: mac_addr, ip_addr: ip_addr }
    end
  end
  leases_to_release.compact!
  unless leases_to_release.empty?
    system("systemctl stop lxc-net.service")
    leases_to_release.each do |l|
      puts "Releasing lingering DHCP lease: #{l[:dhcp_lease]}"
      DevLXC.search_file_delete_line("/var/lib/misc/dnsmasq.lxcbr0.leases", /( #{l[:mac_addr]} #{l[:ip_addr]} )/)
    end
    system("systemctl start lxc-net.service")
  end
end

#remove_static_ip_address(hwaddr = nil) ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 189

def remove_static_ip_address(hwaddr=nil)
  if hwaddr
    DevLXC.search_file_delete_line("/etc/lxc/dhcp-hosts.conf", /^#{hwaddr}/)
    DevLXC.reload_dnsmasq
  end
end

#run_command(command, output_file = nil) ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 25

def run_command(command, output_file=nil)
  if @container.running?
    puts "Running '#{command}' in '#{@container.name}'"
    puts "Saving output to #{output_file}" if output_file
    @container.run_command(command, output_file)
  else
    puts "'#{@container.name}' is not running"
  end
end

#shutdown ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 51

def shutdown
  @container.shutdown if @container.running?
  remove_static_ip_address(@container.config_item("lxc.network.0.hwaddr")) if @container.defined?
end

#snapshot(comment = nil) ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 56

def snapshot(comment=nil)
  unless @container.defined?
    puts "WARNING: Skipping snapshot of '#{@container.name}' because it does not exist"
    return
  end
  if @container.running?
    puts "WARNING: Skipping snapshot of '#{@container.name}' because it is running"
    return
  end
  puts "Creating snapshot of container '#{@container.name}'"
  snapname = @container.snapshot
  unless comment.nil?
    snapshot = @container.snapshot_list.select { |sn| sn.first == snapname }
    snapshot_comment_file = snapshot.flatten[1]
    IO.write(snapshot_comment_file, comment) unless snapshot_comment_file.nil?
  end
end

#snapshot_destroy(snapname = nil) ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 74

def snapshot_destroy(snapname=nil)
  unless @container.defined?
    puts "Skipping container '#{@container.name}' because it does not exist"
    return
  end
  if snapname == "ALL"
    if @container.snapshot_list.empty?
      puts "Container '#{@container.name}' does not have any snapshots"
    else
      @container.snapshot_list.each do |snapshot|
        puts "Destroying snapshot '#{snapshot.first}' of container '#{@container.name}'"
        @container.snapshot_destroy(snapshot.first)
      end
    end
  elsif snapname == "LAST"
    if @container.snapshot_list.empty?
      puts "Container '#{@container.name}' does not have any snapshots"
    else
      snapname = @container.snapshot_list.last.first
      puts "Destroying snapshot '#{snapname}' of container '#{@container.name}'"
      @container.snapshot_destroy(snapname)
    end
  else
    snapshot = @container.snapshot_list.select { |sn| sn.first == snapname }
    if snapshot.flatten.empty?
      puts "Container '#{@container.name}' does not have a '#{snapname}' snapshot"
    else
      puts "Destroying snapshot '#{snapname}' of container '#{@container.name}'"
      @container.snapshot_destroy(snapname)
    end
  end
end

#snapshot_list ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 107

def snapshot_list
  snapshots = Array.new
  return snapshots unless @container.defined?
  @container.snapshot_list.each do |snapshot|
    (snapname, snap_comment_file, snaptime) = snapshot
    snap_comment = IO.read(snap_comment_file).chomp if File.exist?(snap_comment_file)
    snapshots << [snapname, snaptime, snap_comment]
  end
  snapshots
end

#snapshot_restore(snapname = nil) ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 118

def snapshot_restore(snapname=nil)
  unless @container.defined?
    puts "WARNING: Skipping container '#{@container.name}' because it does not exist"
    return
  end
  if @container.running?
    puts "WARNING: Skipping container '#{@container.name}' because it is running"
    return
  end
  if snapname == "LAST"
    if @container.snapshot_list.empty?
      puts "WARNING: Skipping container '#{@container.name}' because it does not have any snapshots"
    else
      snapname = @container.snapshot_list.last.first
      puts "Restoring snapshot '#{snapname}' of container '#{@container.name}'"
      @container.snapshot_restore(snapname)
    end
  else
    snapshot = @container.snapshot_list.select { |sn| sn.first == snapname }
    if snapshot.flatten.empty?
      puts "WARNING: Skipping container '#{@container.name}' because it does not have a '#{snapname}' snapshot"
    else
      puts "Restoring snapshot '#{snapname}' of container '#{@container.name}'"
      @container.snapshot_restore(snapname)
    end
  end
end

#start ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 39

def start
  return if @container.running?
  hwaddr = @container.config_item("lxc.network.0.hwaddr")
  release_lingering_dhcp_ip_addresses(hwaddr)
  assign_static_ip_address(hwaddr) if @ipaddress
  @container.sync_mounts(@mounts)
  @container.start
  @container.sync_ssh_keys(@ssh_keys)
  @container.set_cgroup_item('memory.limit_in_bytes', @memory_per_server) if @memory_per_server
  puts
end

#status ⇒ Object 



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# File 'lib/dev-lxc/server.rb', line 21

def status
  @container.status
end