[stgt] tgt-admin and a -C, --control-port argument
sekharan at us.ibm.com
Fri Apr 2 01:48:24 CEST 2010
Just wondering if tgtd can take a command from tdtadm to start a new
instance of tgtd with control port and iscsi portal.
The usage scenario I have is this:
- tgtd starts as it is today from init scripts without any control port
or iscsi portal addresses
- User defines targets in targets.conf file with target-address
- tgt-admin invokes tgtadm command to create tgtd with specific control
- tgt-admin sends (thru tgtadm) target create requests to control ports
if the target has target-address
- tgt-admin sends (thru tgtadm) target create request to the tgtadm that
doesn't have any control port associated
- When tgtadm needs the listing of targets, tgtadm provides it with all
the targets it controls and all the control ports defined. And
tgt-admin uses all the control ports to get the targets connected to
each of the control ports
This needs some additional changes to tgtadm.
Or is it already implemented that way ?
If this model won't work, how do I use the control port model with tgtd
needing to start at a time where all the control ports and ip addresses
are not known (boot time) and how tgt-admin will get target information
for all the control ports ?
On Thu, 2010-04-01 at 09:54 -0700, Chandra Seetharaman wrote:
> 1. The purpose of multiple tgtds (and the control port) is to make each
> tgtd dedicated to ipaddress (or port).
> 2. Each target will be associated with only one ip address (which also
> means we have to add a ip address token to target definition).
> (1) and (2) make me think that we do not need an explicit "control port"
> parameter for targets.conf syntax.
> If any target has a ip address specifically defined, then tgt-admin can
> define a control port and use it at the right place (as it does with tid
> currently) and keep the control port definition totally internal to
> Does it make sense ? Or am I missing something ?
> I had a related question, will we ever want to make multiple ip
> addresses served by a single tgtd ?
> On Wed, 2010-03-31 at 18:38 +1100, ronnie sahlberg wrote:
> > Hi Tomasz
> > tgtd and tgtadm now supports a -C, --control-port=X argument allowing
> > to run multiple instances of tgtd in parallel, each one bound to a
> > dedicated ip address or port.
> > As the developer/maintainer of tgt-admin, would you consider adding a
> > -C, --control-port argument to tgt-admin?
> > If this argument is used, all calls to tgtadm would be changed to use
> > --control-port=X too ?
> > regards
> > ronnie sahlberg
> > --
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