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       eucalyptus.conf,   eucalyptus.local.conf   -  configuration  files  for





       This manual describes the configuration files  used  to  configure  and
       customize Eucalyptus.

       /etc/eucalyptus/eucalyptus.conf    is    the   traditional   Eucalyptus
       configuration file.  In previous Eucalyptus versions (<1.6.2),  and  on
       non-Ubuntu  versions,  Eucalyptus  is configured by this one monolithic
       file, with inline comments describing  all  options.   As  of  Ubuntu's
       Eucalyptus  1.6.2  version, the inline documentation has been extracted
       to two manpages, euca_conf(8) and this page, eucalyptus.conf(5).

       /etc/eucalyptus/eucalyptus.conf  now  contains  a  base  set  of   your
       distribution's  recommended  configuration.   This  file  is managed by
       dpkg(1), and provides  a  vector  for  your  distribution  to  add  new
       variables/values and maintain a sane set of defaults.  It serves as the
       base configuration, which are easily overriden by the administrator.

       /etc/eucalyptus/eucalyptus.local.conf  contains   values   written   by
       euca_conf(8).   This file should never be edited directly.  Rather, the
       user should see the documentation at euca_conf(8) and use  the  various
       options and interfaces for modifying this file.


       Each  option  below  may affect one or more of the following Eucalyptus
         - CLC = Cloud Controller
         - WC  = Walrus Controller
         - CC  = Cluster Controller
         - SC  = Storage Controller
         - NC  = Node Controller

       **NOTE**: To activate changes of any parameters on a CC, you must:
         sudo restart eucalyptus-cc CLEAN=1

       **HOWEVER**, if you do this, all currently running virtual machines  in
       this cluster will lose network connectivity.

       Options affecting CLC, WC, CC, SC, NC:

              This variable points to where eucalyptus has been installed.

              This is the username that you would like eucalyptus to run as.

       Options affecting CLC, WC, SC only:

              Enable/disable Eucalyptus dynamic DNS functionality.

              Use either iSCSI or AoE for dynamic block storage.

              Amount of memory to allocate to the JVM.  This number value will
              affect how many instances you can over a period of time.   These
              processes are memory hungry; give them as much memory as you can
              spare.  At least 2048m is recommended for very  busy  Eucalyptus

       Options affecting CC, NC only:

              This  variable  controls  whether ws-security is enabled between
              eucalyptus components.   The  default  settings  provide  secure
              connections between the Cloud, Cluster, and Node Controllers and
              we recommend that this feature remains enabled.  If you wish  to
              disable  security,  you  must  change  this  variable to "N" and
              manually configure the services.xml for both  Cluster  and  Node
              Controllers (see documentation for more details).

              This  variable controls the level of logging output that appears
              in various eucalyptus log files.  The options are, in descending
              order  of  verbosity, 'DEBUG, INFO, WARN, ERROR, and FATAL'. The
              default is DEBUG (everything).

              The 2 variable  VNET_PRIVINTERFACE and VNET_PUBINTERFACE specify
              the  local  physical  ethernet interfaces that eucalyptus should
              use   to   manage   the   VM   network.    On   the   front-end,
              VNET_PRIVINTERFACE  should be set to the device that is attached
              to the same ethernet network as your nodes.  - VNET_PUBINTERFACE
              should  be  set to the device which is connected to the 'public'
              network.  If you have only one interface, these should be set to
              the  same value.  On the nodes, both should be set to either the
              name of the bridge that has been set up by  Xen  (xenbr0,  eth0,
              etc),  or  the  physical ethernet device that is attached to the
              xen  bridge  (peth0,  peth1,  etc),  depending   on   your   xen
              configuration.   CAVEAT:  These parameters in eucalyptus.conf do
              not affect Storage Controller interface  settings--to  do  this,
              please use the administrative web interface.

              There  are  four  modes to choose from (MANAGED, MANAGED-NOVLAN,
              SYSTEM, or STATIC) and each has its own sub-options.  The  first
              modes  (MANAGED,  MANAGED-NOVLAN)  configure eucalyptus to fully
              manage the VM networks, and enables the ability to use  security
              groups  and  dynamic public IP assignment (with and without vlan
              tagging of security group networks, respectively).

       Options affecting CC only:

              This is the port the Cluster Controller will be listening on.

              This  option  configures  the  Cluster  Controller's  scheduling
              policy.  Currently, this option can be set to GREEDY (first node
              that is found that can run the VM will  be  chosen),  ROUNDROBIN
              (nodes  are  selected  one after another until one is found that
              can run the VM), or POWERSAVE (nodes are put to sleep when  they
              are  not  running  VMs,  and  reawakened  when new resources are
              required.  VMs will  be  placed  on  the  first  awake  machine,
              followed by machines that are asleep).

              Powersave  options.   POWER_IDLETHRESH  is the number of seconds
              that a node can remain idle  (i.e.  no  running  VMs)  before  a
              powerdown  is  attempted.   POWER_WAKETHRESH  is  the  number of
              seconds that Eucalyptus should  wait  after  attempting  a  node
              wake-up  before it will consider the node actually down (and not
              waking up).

              The name of the Node Controller service. Change this if you want
              to plug in your own Node Controller service.

              This  indicates where we have a dhcp server binary. We use it to
              provide  the  images  with  IPs:  Eucalyptus  provides  its  own
              configuration per instance.

              Some  systems have their DHCP daemon configured to run as a non-
              root user.  If this is the case, set the name of that user  here
              (by  default,  Eucalyptus  will set up DHCPD configuration files
              and directories as owned by root).

              The  list  of  Node  Controllers  the  Cluster  Controller  will
              communicate  with.  If you are running Rocks, you can run "rocks
              list host" to find out the list of machines available to you (in
              our case we are interested in the VM Container kind).

              VNET_SUBNET  should  be  set  to  an  IP subnet that is free for
              eucalyptus to use  (i.e.  no  other  system  connected  to  your
              network directly is configured with addresses from this subnet).

              VNET_NETMASK defines the size of the subnet.

              VNET_DNS should be set to a DNS server  that  your  systems  use
              (usually  safe  to  use  the  same DNS that is configured on the

              VNET_ADDRSPERNET can be used to limit the  number  of  instances
              that   can   be   attached   to   each   named   security  group

              VNET_PUBLICIPS should  be  set  to  any  public  IPs,  that  are
              currently  unused,  that can be dynamically assigned to VMs.  Of
              these  options,  only  VNET_PUBLICIPS  can  be  left  blank   or

              If you are running in multi-cluster mode (more than one CC), you
              should uncomment VNET_LOCALIP and set it to the local IP of  the
              CC  that  is  accessible  by  all  other  CCs in the system.  If
              VNET_LOCALIP is unset, the CC will try to determine the list  of
              all IPs currently assigned to the machine at CC run time.

              If  your  CC  and  CLC  are  on  different  machines,  uncomment
              VNET_CLOUDIP and set it to  your  cloud-contoller's  IP  address
              (must be an address that can be reached by the CC).

       Options affecting the NC only:

              This is the port the Node Controller will be listening on.

              The  hypervisor  that  the Node Controller will interact with in
              order to manage virtual machines.  Currently,  supported  values
              are 'kvm' and 'xen'.

              Setting  this to 1 disables the cleanup of instance files (root,
              kernel, ramdisk) for failed and terminated instances.   This  is
              not  recommended  for  normal  use,  but  it  can  be  useful in
              debugging VM startup.

              The maximum amount of disk space, in Megabytes, that  Eucalyptus
              is     allowed     to     use    in    the    cache    directory
              (INSTANCES_PATH/eucalyptus/cache).    A   generous    size    is
              recommended.  Setting this to zero disables caching.

              VNET_BRIDGE should be set to the name of the bridge that xen has
              configured.  This is typically named 'xenbr0,  xenbr1,  etc'  on
              older Xen versions, and 'eth0, eth1, etc' on newer Xen versions.
              The command 'brctl show' will give you more information on  your
              local bridge setup.

              This  variable  points  to a directory which is used by the Node
              Controller to store images of running instances as well as local
              cached  copies  of  images.   The running images will be deleted
              after the instance is terminated, but  the  cached  copies  will
              persist,  subject to LRU cache replacement and the NC_CACHE_SIZE
              size limit, below.  So, this partition should be at least as big
              as  the  cache  size (or the maximum space needed by all images,
              whichever is bigger)  plus  the  maximum  space  needed  by  the
              maximum number of instances allowed on the node.  This directory
              should be local to the Node Controller  (as  opposed  to  a  NFS
              share) for performance reasons.

              The maximum amount of memory Eucalyptus is allowed to use on the
              node: if you leave this commented out, Eucalyptus will  use  all
              available  memory,  otherwise it will use at most this value for
              ALL running instances.

              The maximum number of CPU/cores Eucalyptus is allowed to use  on
              the node (at the moment we don't differentiate between cores and
              CPU). If you leave this commented out, Eucalyptus will  use  all
              available CPU/cores it can find.

              The size of the swap partition, in MB, for each instance started
              on the node (default is 512MB).  If the maximum disk allowed for
              the  instance is not big enough to accommodate the swap together
              with the root partition, then no swap is allocated.  If there is
              extra  room left, then an "ephemeral" partition will be created,
              available as /dev/sda3 inside the VM.

              Set the number of 'disk intensive operations' that  are  allowed
              to take place in parallel on this machine.  If this value is set
              too high, we run the risk of driving the load on the machine too
              high  when  multiple  instances are started on this single node.
              The default is 4.




       This manpage was written by  Dustin  Kirkland  <>
       (with  extensive help from Daniel Nurmi, and some of it lifted from the
       original /etc/eucalyptus/eucalyptus.conf) for Ubuntu systems  (but  may
       be  used  by others).  Permission is granted to copy, distribute and/or
       modify this document under the terms of the GNU General Public License,
       Version 3 published by the Free Software Foundation.

       On  Debian systems, the complete text of the GNU General Public License
       can be found in /usr/share/common-licenses/GPL.