12-13-2007
That sounds like a job for ssh public keys (as you said), a webserver on the three servers, or automated emails from the three servers.
Which one to go for depends on the type of data and your security concerns (ie what happens if your 'master' server gets compromised? Do you need to guarantee the data has come from who it appears to come from? Do you need to encrypt the data to protect it from snooping?).
Public key exchange gives you two options:
server1-3 to master server: You allow server1,2 and 3 to log onto the master server via public key. This will let them push data onto the master server.
Pros: If your master server gets compromised, you don't lose all other servers. Data is encrypted.
Cons: Any of the servers pushing data will have access to the data from all the other servers (unless you use a different account for each server)
master server gets from server1-3: You allow the master server to log onto all the other servers. This lets the master server pull the data it needs.
Pros: Central management of scheduling etc, the various servers don't have to know about each other and you can protect the data from each server.
Cons: If you lose the master server, it can spread to all other servers.
If you set up a webserver on each of the servers, you can pull the data anonymously. But if you can get the data, anyone can.
You can also have each server send the data to a particular email address on your master server. Just add a | /path/to/processingscript.sh as an aliase for that account and they will be automatically handled as they come in.
Anyone can send a file claiming to be one of your servers though and you'll never know.
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LEARN ABOUT V7
asadmin-delete-instance
asadmin-delete-instance(1AS) User Commands asadmin-delete-instance(1AS)
NAME
delete-instance - deletes the instance that is not running.
SYNOPSIS
delete-instance [--user admin_user] [--password admin_password] [--host localhost] [--port 4848] [--local=false] [--domain domain_name]
[--passwordfile filename] [--secure|-s]instance_name
Use the delete-instance command to delete the instance that you specify. The delete-instance command can be run both locally and remotely.
To delete the instance locally, not requiring the administration server to be up and running, specify the --local option. To delete the
instance remotely, the administration server must be running on the hostname and port number specified. The user authenticates using the
password identified for the administration server. Additionally, the instance must already exist within the domain served by the adminis-
tration server. Use this command with discretion since it is destructive and there is no undo.
OPTIONS
--user administrative user associated for the instance.
--password administrative password corresponding to the administrative user.
--host host name of the machine hosting the administrative instance.
--port administrative port number associated with the administrative host.
--domain name of the domain.
--local determines if the command should delegate the request to administrative instance or run locally.
--passwordfile file containing passwords appropriate for the command (e.g., administrative instance).
--secure if true, SSL/TLS to communicate with the administrative instance.
OPERANDS
instance_name name of the instance to be deleted.
Example 1: Using delete-instance in local mode
asadmin> delete-instance --domain domain1 server1
Deleted Instance server1 successfully
Where: the server1 instance for the domain1 domain is deleted on the local machine.
Example 2: Using delete-instance in remote mode
asadmin> delete-instance --user admin --passwordfile passwords.txt --host localhost --port 4848 server1
Deleted Instance server1 successfully
Where: the server1 instance for the domain associated with the specified user, passwords in the password file, host, and port number is
deleted on the remote machine.
EXIT STATUS
0 command executed successfully
1 error in executing the command
INTERFACE EQUIVALENT
Server Instance page
asadmin-create-instance(1AS), asadmin-start-instance(1AS), asadmin-stop-instance(1AS), asadmin-restart-instance(1AS)
J2EE 1.4 SDK March 2004 asadmin-delete-instance(1AS)