Class: Kytoon::Providers::Xenserver::ServerGroup

Inherits:
Object
  • Object
show all
Defined in:
lib/kytoon/providers/xenserver/server_group.rb

Overview

ip addr add 192.168.0.1/24 brd 192.168.0.255 scope global dev xenbr1

Constant Summary collapse

CONFIG_FILE = 
KYTOON_PROJECT + File::SEPARATOR + "config" + File::SEPARATOR + "server_group.json"
@@data_dir = 
File.join(KYTOON_PROJECT, "tmp", "xenserver")

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ ServerGroup

Returns a new instance of ServerGroup.

Raises:



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 53

def initialize(options={})
@id = options[:id] || Time.now.to_f
@name = options[:name]
@netmask = options[:netmask]
@gateway = options[:gateway]
@broadcast = options[:broadcast]
@network_type = options[:network_type]
@bridge = options[:bridge]
@public_ip_bridge = options[:public_ip_bridge]
@dns_nameserver = options[:dns_nameserver]
@cleanup_before_create = options[:cleanup_before_create]
@gateway_ip = options[:gateway_ip]
@gateway_ip = ENV['GATEWAY_IP'] if @gateway_ip.nil?
raise ConfigException, "Please specify a GATEWAY_IP" if @gateway_ip.nil?

@servers=[]
end

Instance Attribute Details

#bridge ⇒ Object

Returns the value of attribute bridge.



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 48

def bridge
  @bridge
end

#broadcast ⇒ Object

Returns the value of attribute broadcast.



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 46

def broadcast
  @broadcast
end

#cleanup_before_create ⇒ Object

Returns the value of attribute cleanup_before_create.



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 51

def cleanup_before_create
  @cleanup_before_create
end

#dns_nameserver ⇒ Object

Returns the value of attribute dns_nameserver.



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 50

def dns_nameserver
  @dns_nameserver
end

#gateway ⇒ Object

Returns the value of attribute gateway.



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 45

def gateway
  @gateway
end

#gateway_ip ⇒ Object

Returns the value of attribute gateway_ip.



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 43

def gateway_ip
  @gateway_ip
end

#id ⇒ Object

Returns the value of attribute id.



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 41

def id
  @id
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 42

def name
  @name
end

#netmask ⇒ Object

Returns the value of attribute netmask.



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 44

def netmask
  @netmask
end

#network_type ⇒ Object

Returns the value of attribute network_type.



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 47

def network_type
  @network_type
end

#public_ip_bridge ⇒ Object

Returns the value of attribute public_ip_bridge.



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 49

def public_ip_bridge
  @public_ip_bridge
end

Class Method Details

.cleanup_instances(gw_ip) ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 311

def self.cleanup_instances(gw_ip)
  Kytoon::Util.remote_exec(%{
    for UUID in $(xe vm-list is-control-domain=false | grep uuid | sed -e 's|.*: ||'); do
      # destroy all instances except the basevm's
      if ! xe vm-param-get param-name=other-config uuid=$UUID | grep -c kytoon_base_vm; then
        echo "Destroying Xen instance uuid: $UUID"
        xe vm-shutdown force=true uuid=$UUID
        xe vm-uninstall uuid=$UUID force=true
      fi
    done
    for VDI_UUID in $(xe vdi-list read-only=false | grep -v sr-uuid | grep uuid | sed -e 's|.*: ||'); do
      # destroy all vdi's which aren't in use
      IN_USE=$(xe vbd-list vdi-uuid=$VDI_UUID | grep vdi-uuid | grep -c $VDI_UUID)
      if [[ "$IN_USE" -eq "0" ]]; then
        echo "removing VDI: $VDI_UUID"
        xe vdi-destroy uuid=$VDI_UUID
      fi
    done
  }, gw_ip) do |ok, out|
    if not ok
      puts out
      raise "Failed to cleanup instances."
    end
  end
end

.configure_static_networking(gw_ip, hostname, ip_address, netmask, gateway, broadcast, mac, dns_nameserver) ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 337

def self.configure_static_networking(gw_ip, hostname, ip_address, netmask, gateway, broadcast, mac, dns_nameserver)

  # networking
  network_info = {
    "label" => "public",
    "broadcast" => broadcast,
    "ips" => [{
    "ip" => ip_address,
    "netmask" => netmask,
    "enabled" => "1"}],
    "mac" => mac,
    "dns" => [dns_nameserver],
    "gateway" => gateway
  }

  Kytoon::Util.remote_exec(%{
    UUID=$(xe vm-list name-label=#{hostname} | grep uuid | sed -e 's|.*: ||')
    DOMID=$(xe vm-param-get uuid=$UUID param-name="dom-id")
    xenstore-write -s /local/domain/$DOMID/vm-data/hostname '#{hostname}'
    xenstore-write -s /local/domain/$DOMID/vm-data/networking/123_nw_info '#{network_info.to_json}'

    xenstore-write -s /local/domain/$DOMID/data/host/123_reset_nw '{"name": "resetnetwork", "value": ""}'
    xenstore-rm -s /local/domain/$DOMID/data/guest/123_reset_nw 2> /dev/null
    until [ -n "$NW_RETVAL" ]; do
      NW_RETVAL=$(xenstore-read -s /local/domain/$DOMID/data/guest/123_reset_nw 2> /dev/null)
    done
    xenstore-rm -s /local/domain/$DOMID/data/host/123_reset_nw
    xe vm-reboot uuid=$UUID &> /dev/null
    COUNT=0
    until ping -c 1 #{hostname} &> /dev/null; do
      COUNT=$(( $COUNT + 1 ))
      [ $COUNT -eq 10 ] && break
    done
    until ssh -o ConnectTimeout=1 #{hostname} &> /dev/null; do
      COUNT=$(( $COUNT + 1 ))
      [ $COUNT -eq 20 ] && break
      sleep 1
    done
    ssh #{hostname} bash <<-EOF_SSH_BASH
hostname #{hostname}
    EOF_SSH_BASH
    scp /etc/hosts #{hostname}:/etc/hosts
  }, gw_ip) do |ok, out|
    puts out
    if not ok
      puts out
      raise "Failed to setup static networking for #{hostname}."
    end
  end

end

.create(sg) ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 174

def self.create(sg)
  ServerGroup.cleanup_instances(sg.gateway_ip) if sg.cleanup_before_create
  sg.cache_to_disk
  init_host(sg)
  status, host_ssh_public_key = Kytoon::Util.remote_exec(%{
if [ -f /root/.ssh/id_rsa.pub ]; then
cat /root/.ssh/id_rsa.pub
elif [ -f /root/.ssh/id_dsa.pub ]; then
cat /root/.ssh/id_dsa.pub
else
exit 1
fi
  }, sg.gateway_ip)
  sg.servers.each do |server|
      create_instance(sg.gateway_ip, server['image_path'], server['hostname'], server['mac'], sg.bridge, host_ssh_public_key)
      network_type = sg.network_type
      if network_type == 'static' then
          configure_static_networking(sg.gateway_ip, server['hostname'], server['ip_address'], sg.netmask, sg.gateway, sg.broadcast, server['mac'], sg.dns_nameserver)
      else
        raise "Unsupported network type '#{sg.network_type}'"
      end
  end
  sg
end

.create_instance(gw_ip, image_path, hostname, mac, xen_bridge = 'xenbr1', ssh_public_key = nil) ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 268

def self.create_instance(gw_ip, image_path, hostname, mac, xen_bridge='xenbr1', ssh_public_key=nil)
  file_data = Base64.encode64("/root/.ssh/authorized_keys,#{ssh_public_key}")

  Kytoon::Util.remote_exec(%{
    BASE_VM_NAME=$(basename #{image_path})
    BASE_VM_UUID=$(xe vm-list name-label=$BASE_VM_NAME | grep uuid | sed -e 's|.*: ||')

    if [ -z "$BASE_VM_UUID" ]; then
      # create base vm for future use
      BASE_UUID=$(xe vm-import filename=#{image_path})
      xe vm-param-set name-label=$BASE_VM_NAME uuid=$BASE_UUID
      xe vm-param-set other-config:kytoon_base_vm=true uuid=$BASE_UUID
    fi

    UUID=$(xe vm-clone vm=$BASE_VM_NAME new-name-label=${BASE_VM_NAME}_new)
    xe vm-param-remove param-name=other-config param-key=kytoon_base_vm uuid=$UUID
    xe vm-param-set name-label=#{hostname} uuid=$UUID
    NETWORK_UUID=$(xe network-list bridge=#{xen_bridge} | grep -P "^uuid" | cut -f2 -d: | cut -f2 -d" ")
    xe vif-destroy uuid=$VIF_UUID &> /dev/null
    for VIF_UUID in $(xe vif-list vm-uuid=$UUID | grep uuid | sed -e 's|.*: ||'); do
      echo "Destroying Xen VIF uuid: $VIF_UUID"
      xe vif-destroy uuid=$VIF_UUID &> /dev/null
    done
    xe vif-create vm-uuid=$UUID mac=#{mac} network-uuid=$NETWORK_UUID device=0 &> /dev/null
    xe vm-start uuid=$UUID &> /dev/null

    # inject ssh from host
    DOMID=$(xe vm-param-get uuid=$UUID param-name="dom-id")
    xenstore-rm -s /local/domain/$DOMID/data/guest/ssh_key 2> /dev/null
    xenstore-write -s /local/domain/$DOMID/data/host/ssh_key '{"name": "injectfile", "value": "#{file_data}"}'
    until [ -n "$INJECT_RETVAL" ]; do
      INJECT_RETVAL=$(xenstore-read -s /local/domain/$DOMID/data/guest/ssh_key 2> /dev/null)
    done
    xenstore-rm -s /local/domain/$DOMID/data/host/ssh_key

  }, gw_ip) do |ok, out|
    if not ok
      puts out
      raise KytoonException, "Failed to create instance #{hostname}."
    end
  end
end

.data_dir ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 31

def self.data_dir
  @@data_dir
end

.data_dir=(dir) ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 35

def self.data_dir=(dir)
  @@data_dir=dir
end

.from_json(json) ⇒ Object

generate a Server Group XML from server_group.json



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 84

def self.from_json(json)

  json_hash=JSON.parse(json)

  sg=ServerGroup.new(
    :id => json_hash["id"],
    :name => json_hash["name"],
    :netmask => json_hash['netmask'],
    :gateway => json_hash['gateway'],
    :gateway_ip => json_hash['gateway_ip'],
    :broadcast => json_hash['broadcast'],
    :dns_nameserver => json_hash['dns_nameserver'],
    :network_type => json_hash['network_type'],
    :public_ip_bridge => json_hash['public_ip_bridge'],
    :cleanup_before_create => json_hash['cleanup_before_create'],
    :bridge => json_hash['bridge']
  )
  json_hash["servers"].each do |server_hash|
    sg.servers << {
      'hostname' => server_hash['hostname'],
      'ip_address' => server_hash['ip_address'],
      'mac' => server_hash['mac'],
      'image_path' => server_hash['image_path']
    }
  end
  return sg

end

.get(options = {}) ⇒ Object

Raises:



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 199

def self.get(options={})
  id = options[:id]
  if id.nil? then
    group=ServerGroup.most_recent
    raise NoServerGroupExists, "No server group files exist." if group.nil?
    id=group.id
  end

  out_file=File.join(@@data_dir, "#{id}.json")
  raise NoServerGroupExists, "No server group files exist." if not File.exists?(out_file)
  ServerGroup.from_json(IO.read(out_file))
end

.index(options = {}) ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 212

def self.index(options={})

  server_groups=[]
  Dir[File.join(ServerGroup.data_dir, '*.json')].each do  |file|
    server_groups << ServerGroup.from_json(IO.read(file))
  end
  server_groups

end

.init_host(sg) ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 234

def self.init_host(sg)

  cidr = IPAddr.new(sg.netmask).to_i.to_s(2).count("1")

  hosts_file_data = "127.0.0.1\tlocalhost localhost.localdomain\n"
  sg.servers.each do |server|
    hosts_file_data += "#{server['ip_address']}\t#{server['hostname']}\n"
  end

  Kytoon::Util.remote_exec(%{
# Add first IP to bridge
if ! ip a | grep #{sg.gateway}/#{cidr} | grep #{sg.bridge}; then
ip a add #{sg.gateway}/#{cidr} dev #{sg.bridge}
fi

cat > /etc/hosts <<-EOF_CAT
#{hosts_file_data}
EOF_CAT
# FIXME... probably a bit insecure but most people are probably using
# boxes behind another firewall anyway.
iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
iptables -t nat -A POSTROUTING -o #{sg.public_ip_bridge} -j MASQUERADE
echo 1 > /proc/sys/net/ipv4/ip_forward
  }, sg.gateway_ip)
end

.most_recent ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 222

def self.most_recent
  server_groups=[]
  Dir[File.join(@@data_dir, "*.json")].each do  |file|
    server_groups << ServerGroup.from_json(IO.read(file))
  end
  if server_groups.size > 0 then
    server_groups.sort { |a,b| b.id <=> a.id }[0]
  else
    nil
  end
end

Instance Method Details

#cache_to_disk ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 141

def cache_to_disk

  sg_hash = {
      'id' => @id,
      'name' => @name,
      'netmask' => @netmask,
      'gateway' => @gateway,
      'gateway_ip' => @gateway_ip,
      'broadcast' => @broadcast,
      'dns_nameserver' => @dns_nameserver,
      'cleanup_before_create' => @cleanup_before_create,
      'network_type' => @network_type,
      'public_ip_bridge' => @public_ip_bridge,
      'bridge' => @bridge,
      'servers' => []
  }
  @servers.each do |server|
      sg_hash['servers'] << {'hostname' => server['hostname'], 'ip_address' => server['ip_address'], 'image_path' => server['image_path'], 'mac' => server['mac']}
  end

  FileUtils.mkdir_p(@@data_dir)
  File.open(File.join(@@data_dir, "#{@id}.json"), 'w') do |f|
    f.chmod(0600)
    f.write(sg_hash.to_json)
  end
end

#delete ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 168

def delete
  ServerGroup.cleanup_instances(@gateway_ip)
  out_file=File.join(@@data_dir, "#{@id}.json")
  File.delete(out_file) if File.exists?(out_file)
end

#pretty_print ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 113

def pretty_print

  puts "Group ID: #{@id}"
  puts "name: #{@name}"
  puts "Servers:"
  servers.each do |server|
    puts "\tname: #{server['hostname']}"
    puts "\t--"
  end

end

#server(name) ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 71

def server(name)
  @servers.select {|s| s['hostname'] == name}[0] if @servers.size > 0
end

#server_names ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 125

def server_names

  names=[]  

  servers.each do |server|
    if block_given? then
      yield server['hostname']
    else
      names << server['hostname']
    end  
  end

  names
  
end

#servers ⇒ Object 



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# File 'lib/kytoon/providers/xenserver/server_group.rb', line 75

def servers
  @servers
end