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If you are willing to make an investment in some scripts and learning the API, you can have your cake and eat it too :)
1. Externalize the HA (e.g. the virtual ip) using a load balancer
2. Create a script or program that leverages the API to cause the volume replication to "flip"
Open-E, the API should allow for one to control volume replication and iSCSI Targets correct?
Yes, and No.....Quote:
Open-E, the API should allow for one to control volume replication and iSCSI Targets correct?
Target manipulation can be achieved in the API, but the replication switching can be a bit tricky.. I havent tested it, but it may be possible.
got a test box around, and want to test this, i can throw ya some commands if u want.....
I'm going to take you up on that offer next week. I need to do some prep of my dev environment.
I have some more but let me know if this helps.
create_iscsilv - Creates a logical iSCSI Volume.
volume_iscsi_remove - Removes a logical iSCSI volume
volume_replication - Adds and removes replication to volume.
volume_status - Displays storage info.
FAILOVER:
Usage: failover --status | --actions | --start | --stop | --failover | --synchronize | --failback
This function allows you to stop, run or change the operation mode for the
given server.
Options:
-h, --help show this help message and exit
--status show iSCSI Failover status.
--actions show available iSCSI Failover actions.
--start start iSCSI Failover. On the primary server the Start
action
controls both servers. On the secondary server, it
controls
the secondary server only.
--stop stop iSCSI Failover. On the primary server the Stop action
controls both servers. On the secondary server, it
controls
the secondary server only.
--failover failover action delegate (switch) active server state
to the
passive server.
--synchronize synchronize data from the secondary/active server to the
primary server
--failback failback action will return the active server state to the
primary server.
A few more on iSCSI:
iscsi_target_assign - Assign lv with given name to existing iSCSI target.
iscsi_target_create - Creates a new iSCSI target.
iscsi_target_list - Lists iSCSI targets (syntax: alias;name).
iscsi_target_restart - Restart iSCSI target service.
iscsi_target_sessions - Shows and manages iSCSI target sessions.
iscsi_target_status - Lists the parameters of the selected target.
iscsi_target_unassign - Unassign from given iSCSI target lvname.