AS7 configure domain, what exactly has to altered in host.xml and domain.xml

[martineikelboom]

Could someone send me, or show me where to find, real examples of a working domain, with multiple servers. I would like to know how the host.xml and domain.xml is configured. I am not sure what and what not to alter in those files.

I have tryed to follow the jboss documentation, but get the following error.

Failed to start server (server-two): java.util.NoSuchElementException: No child ‘main-server-group’ exists

What does this mean?

[wdfink]

You have one domain controller (the one with domain-controller.local in the host.xml).

This one must be started first and have a server-group (see domain.xml) main-server-group.

Each host.xml define a server and join a server-group of the domain.

you might have a look to https://docs.jboss.org/author/display/AS7/Domain+Setup

If you have problems please attach the domain.xml and host.xml's and the appropirate server logfile.

[martineikelboom]

Is it possible to set this up using 1 IP address?

Or is it required to distinguish the servers on the basis of IP address?

I have multiple standalone servers installed, and I want to configure 1 server as domain controller/host controller, and the others as slaves.

Would be good to get an example, so I can see what is required to be different, altered, default, etc.

[wdfink]

You might use the same or different IP addresses.

If you look into a fresh installation there is an example of a domain configuration.

If you start the domain there are 3 servers (you have to set auto-start true within the host.xml)

The server start with a port-offset instead of using different ip addresses.

The next host you have to change port-offset or use '-b' during start to set the IP address on the same machine.

Helpful descriptions you will find in the domain setup document (link above)

[martineikelboom]

I managed to get a domain configuration going. My understanding is that I now have 1 host controller, and this controls 3 servers, including itself. These servers reside on the same host, although they are called hosts in the configuration files.

I would like to know then what is the definition of a host.

My aim is:

3 separate servers which I consider hosts. I want to link those hosts with the host controller. How do I configure that?

if this is possible, then why the offset, if these hosts all have there own IP range?

I also miss documentation on High Availabilty for release 7.0.  Should I be refering to another version for similar concepts?

[martineikelboom]

Has anybody got an answer to

1. why the offset if they are on different hosts with differing IP numbers. What is the difference to a cluster with offset IPnumbers and cluster on differing hosts

2. how does the host controller start and stop a slave server, or do you have to start these separatly?

3. doc HA version 7 location?  Is the version 5 HA comparable to version 7 in regards to HA concepts and configuration?

[wdfink]

1. You might use port-offset and/or different IP bindings. Functional there is no difference.

  It might be easier to track cluster stuff if you have different IPs, otherwise it can be difficult to differing the instances

  I would recommend to use one strategie per environment, i.e. IP binding with original ports for test and changed ports for production

2. A host controller will start/stop instances by request it via domain management interface (HTTP or CLI).

    The domain cotroller will be the master.

    If you add a new host-controller to a domain (start a instance with domain.sh and have a remote domain address)

    the host will connect the domain-controller, push the configuration and start the server configured in its host.xml

3. The documentation is not ready yet, see https://docs.jboss.org/author/display/AS71/High+Availability+Guide

     concept will be still based on JGroups but the configuration will be completely different