First install iscsi-initiator-utils.x86_64
# yum -y install iscsi-initiator-utils.x86_64
Then perform a discovery
# iscsiadm -m discovery -t sendtargets -p datastor01.aossama.net
The output should look something like this
192.168.0.34:3260,1 iqn.2012-20.com.aossama:datastor01
Finally start iscsi and iscsid service.
# chkconfig iscsi on && chkconfig iscsid on
# service iscsi start && service iscsid start
Advanced tasks on iSCSI initiators in Part 2.
First Prepare a LUN (Logical Unit Number):
# dd if=/dev/zero of=/opt/lun0.img bs=1M seek=10240 count=0
This will allocate a thin provisioned LUN which will be used as for the iSCSI target device.
After that install scsi-target-utils.x86_64 package, enable the service and start it:
# yum -y install scsi-target-utils.x86_64
# chkconfig tgtd on
# service tgtd start
Then create a target device
# tgtadm --lld iscsi --mode target --op new --tid=1 \
--targetname iqn.2012-04.com.aossama:datastor01
Add the LUN to the target device
# tgtadm --lld iscsi --mode logicalunit --op new --tid 1 --lun 1 -b /opt/lun0.img
Finally allow all initiators
# tgtadm --lld iscsi --mode target --op bind --tid 1 -I ALL
Check that everything is configured correctly
# tgtadm --lld iscsi --op show --mode target
And that’s it, simple!!!
But that’s not all the story, performing more advanced tasks such as setting CHAP authentication on the target and setting digest are covered in Part 2.
Bind9 journal file is a file which is created by the server either when a dynamic update takes place on the journal-ized zone or by changes that result from incoming incremental zone transfers.
To view the zone’s journal in a human-readable form:
named-journalprint /path/to/zone/journal/file.jnl
If you have a zone configured for dynamic updates, most probably you won't be able to deal with the zone file directly, first disable dynamic updates to the zone using rndc freeze zone. This will also remove the zone's .jnl file and update the master file. Edit the zone file. Run rndc unfreeze zone to reload the changed zone and re-enable dynamic updates.