Subversion Repositories havirt

=== Overview

Basic 

    havirt [command [action]] [flags]

command is actually a module name, action is a function (sub) within the

module, and flags can be placed anywhere, Thus,

    havirt domain list

loads the domain module and runs the list function. To send the output to

a tab separated value, you can use the -f flag, so the following are

equivilent

    havirt -f tsv domain list

    havirt domain list -f tsv

    havirt domain -f tsv list

Base modules are:

- **domain**: Work with individual virtual servers, called domains under virtlib

- **node**: Work with hypervisors, called nodes under virtlib

- **cluster**: Work with the entire cluster of hypervisors

Each command has a help parameter which is called if no action is passed (or the action is

help). The commands *havirt node* and *havirt node help* are equivilent

=== domain.pm module commands

==== update [domainname|-t domainname]

   updates capabilities on one or more domains by reading and parsing the files

   stored in conf/ and updating var/status.yaml

   default is to rescan all domains

==== list [--format|-f screen|tsv]

   Displays all domains with some statistics about them as screen or tsv 

   default is to display to fixed width for screen display

==== start domainname [node]

   Checks to ensure domain not running on any node, and starts domainname on 

   requested node. Displays an error message if domain configuration not

   found, or the domain is found to be running somewhere in the cluster.

   Verifies domain not running by rescanning all nodes

   If node not set, will start on the current node (one which user logged into).

==== shutdown domainname

   Initiates a shutdown on a running domain and sets "maintenance" flag so

   keepalive will not restart it

==== migrate domainname [node]

   migrates domain from current node to target. If target node not specified

   will be automatically selected with least used node

==== new [domainname]

   Displays a virt-install command that will fill in several blanks such as

   an unused VNC port, a newly generated UUID and a randomly generated

   MAC address. If domainname is passed in, will insert that also.

   Uses the file virt-install.template in the havirt directory

   WARNING: MAC address randomly generated with prefix of '00163e' (assigned

   to XEN) and is not guaranteed to be unique in cluster at this time.

=== node.pm module commands

==== update [nodename|-t nodename]

   Updates capabilities on one or more nodes. If node is not currently in

   database, will be added

   default is all nodes

==== add - convenience alias for update

==== list [--format|-f screen|tsv]

   Lists all nodes with some statistics about them as screen or tsv (default

   screen)

==== scan [nodename|-t nodename][-y]

   Updates list of domains on one or more existing nodes

   This should be run regularly via a cron job to keep the database up to

   date.

   Will NOT scan if the most recent scan has taken place less thn 5 minutes

   ago, determined by timestamp on file 'lastscan'). To force a new scan

   pass the -y flag, or delete lastscan

   default is scan all nodes

=== cluster.pm module

==== status [--format|-f screen|tsv]

   displays some stats on resources used on each node