One of my database inputs has a column named Server which contains the hostname for whichever machine an app is running on. It would be nice if the host field could map to whatever value is in that column at the time it is brought in, but I haven't found a way to do that.
There's some other questions about how to do something similar with other input types (files, via parsing), but I haven't seen one that I've been able to get working for a database input.
I suppose I could create a new input for each machine that will show up in there (custom query) and then set the static Host Field value to it's hostname but right now I'd rather just have one input.
if your inputs.conf is like this:
[dbmon-tail:........]
sourcetype=table_with_host
you can set up props.conf and transforms.conf to replace the host name in indexing time.
props.conf:
[table_with_host]
TRANSFORMS-host_rename=rename_host_by_field_host
transforms.conf:
[rename_host_by_field_host]
SOURCE_KEY=fields:hostname
DEST_KEY=MetaData:Host
document could be refer to:
http://docs.splunk.com/Documentation/Splunk/6.1.3/Data/Overridedefaulthostassignments