Flexible GlassFish domain creation using --portbase

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Marseille PortOne nice thing about GlassFish is the notion of a domain. A single installation can have multiple domains, each being created with the asadmin create-domain command. I use that a lot to separate clients and servers when using web services for instance. If you're not using Solaris Containers/Zones which have their own set of ports, you have to have different port settings for each domain. Default ports for GlassFish are as follows:
    4848 for Admin
    8080 
for HTTP Instance
    7676 
for JMS
    3700 
for IIOP
    8181 
for HTTP_SSL
    3820 
for IIOP_SSL
    3920 
for IIOP_MUTUALAUTH
    8686 
for JMX_ADMIN
When creating a new domain, I usually always start the other domains I'd like to see running at the same time and specify new Admin and HTTP Instance ports. The reason for starting first other domains is to make sure the new domain with not be created with any ports already in use (exact ports used are shown during domain creation).

The other option I recently found out about is --portbase. This allows you to provide a base port and have other ports defined as offsets.
Taken straight from the asadmin create-domain --help output:
 --portbase
       Determines the number with which the  port  assignment
       should  start. A domain uses a certain number of ports
       that are  statically  assigned.   The  portbase  value
       determines  where  the assignment should start. Choose
       this value judiciously. The values for the  ports  are
       calculated as follows: Admin port: portbase + 48, HTTP
       listener port: portbase  +  80,  IIOP  listener  port:
       portbase + 37, JMX port: portbase + 86. See the output
       of this command for a complete list of occupied ports,
       when --portbase option is specified.

      Note:

      The --portbase  option  cannot  be  used  with  the  --
      adminport or the --instanceport option.


Also note that when it comes to ports, GlassFish now also has this optionnal feature of unifying ports as described here.

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