mirror of
https://github.com/SCST-project/scst.git
synced 2026-05-19 03:31:26 +00:00
Merge branch 'svn-trunk'
This commit is contained in:
Bart Van Assche
122
scst/README
122
scst/README
@@ -1887,7 +1887,7 @@ information about ALUA support in Windows Server, see also:
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(http://msdn.microsoft.com/en-us/library/gg607458%28v=vs.85%29.aspx).
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Active/Non-Optimized via internal redirection
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...............................................
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.............................................
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The Active-Standby configuration is simple to understand and setup,
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however, it might have serious interoperability issues, because not all
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@@ -1921,8 +1921,8 @@ served to initiator(s) (consider for simplicity that there is only one
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served device)
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5. Connect to this SCST device through this internal target from the
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passive node. Now you have a local SCSI device on the passive side
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pointing to the active node.
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passive node, for instance, using iSCSI. Now you have a local SCSI
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device on the passive side pointing to the active node.
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6. Export this local device to the initiator(s) using SCST
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*path-through* handler (scst_disk). Pass-though is needed to redirect
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@@ -1954,8 +1954,122 @@ on the new passive node.
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6. Finish ALUA states change.
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Example using direct sysfs interface could look like:
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Active-Optimized node:
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modprobe scst
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modprobe scst_disk
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modprobe scst_vdisk
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# Main device, DRBD primary here
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echo "add_device aa filename=/dev/drbd1" >/sys/kernel/scst_tgt/handlers/vdisk_blockio/mgmt
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# Redirect device, not used here. Coming from connecting via iSCSI to the
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# corresponding redirect target on the other side.
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DEVICE=10:0:0:0
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echo add_device $DEVICE >/sys/kernel/scst_tgt/handlers/dev_disk/mgmt
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service iscsi-scst start
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# This is a regular, user-visible target
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echo "add_target iqn.2006-10.net.v:tgt " >/sys/kernel/scst_tgt/targets/iscsi/mgmt
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt/rel_tgt_id
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echo "add aa 0" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt/luns/mgmt
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# This is redirect target, 192.168.9.x is the redirect network
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echo "add_target iqn.2006-10.net.v:tgtR" >/sys/kernel/scst_tgt/targets/iscsi/mgmt
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echo 2 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/rel_tgt_id
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echo "add_target_attribute iqn.2006-10.net.v:tgtR allowed_portal 192.168.9.1" >/sys/kernel/scst_tgt/targets/iscsi/mgmt
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echo "1" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/forwarding
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echo "add aa 0" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/luns/mgmt
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt/enabled
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/enabled
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/enabled
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# ALUA config
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echo create aa >/sys/kernel/scst_tgt/device_groups/mgmt
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echo add aa >/sys/kernel/scst_tgt/device_groups/aa/devices/mgmt
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echo add tgt_a >/sys/kernel/scst_tgt/device_groups/aa/target_groups/mgmt
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echo add iqn.2006-10.net.v:tgt >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_a/mgmt
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echo 1 >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_a/group_id
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echo active >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_a/state
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echo add tgt_n >/sys/kernel/scst_tgt/device_groups/aa/target_groups/mgmt
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echo add iqn.2006-10.net.v:tgt1 >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_n/mgmt
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echo 2 >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_n/iqn.2006-10.net.v:tgt1/rel_tgt_id
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echo 2 >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_n/group_id
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echo nonoptimized >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_n/state
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Active-Non-Optimized node:
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modprobe scst
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modprobe scst_disk
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modprobe scst_vdisk
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# Main device, DRBD secondary, not used here
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echo "add_device aa filename=/dev/drbd1" >/sys/kernel/scst_tgt/handlers/vdisk_blockio/mgmt
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# Redirect device. Coming from connecting via iSCSI to the
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# corresponding redirect target on the other side.
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DEVICE=10:0:0:0
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echo add_device $DEVICE >/sys/kernel/scst_tgt/handlers/dev_disk/mgmt
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service iscsi-scst start
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echo "add_target iqn.2006-10.net.v:tgt1" >/sys/kernel/scst_tgt/targets/iscsi/mgmt
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echo 2 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt1/rel_tgt_id
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echo "add $DEVICE 0" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt1/luns/mgmt
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# Redirect target, 192.168.9.x is the redirect network
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echo "add_target iqn.2006-10.net.v:tgtR" >/sys/kernel/scst_tgt/targets/iscsi/mgmt
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echo 2 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/rel_tgt_id
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echo "add_target_attribute iqn.2006-10.net.v:tgtR allowed_portal 192.168.9.2" >/sys/kernel/scst_tgt/targets/iscsi/mgmt
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echo "1" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/forwarding
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echo "add aa 0" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/luns/mgmt
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt1/enabled
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/enabled
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/enabled
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# ALUA config
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echo create $DEVICE >/sys/kernel/scst_tgt/device_groups/mgmt
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echo add $DEVICE >/sys/kernel/scst_tgt/device_groups/$DEVICE/devices/mgmt
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echo add tgt_a >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/mgmt
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echo add iqn.2006-10.net.v:tgt >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_a/mgmt
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echo 1 >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_a/iqn.2006-10.net.v:tgt/rel_tgt_id
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echo 1 >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_a/group_id
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echo active >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_a/state
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echo add tgt_n >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/mgmt
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echo add iqn.2006-10.net.v:tgt1 >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_n/mgmt
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echo 1 >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_n/group_id
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echo nonoptimized >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_n/state
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ALUA state switch after DRBD primary-secondary transition:
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Ex-Optimized:
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echo "replace_no_ua $DEVICE 0" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt1/luns/mgmt
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echo nonoptimized >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_a/state
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echo active >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_n/state
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Ex-Non-Optimized:
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echo "replace_no_ua aa 0" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt1/luns/mgmt
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echo nonoptimized >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_a/state
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echo active >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_n/state
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If you have any questions, please read this above text at least 3 times
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before asking. It might be tricky to understand.
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before asking. It might be tricky to understand :-)
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VAAI
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----
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@@ -1740,7 +1740,7 @@ information about ALUA support in Windows Server, see also:
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(http://msdn.microsoft.com/en-us/library/gg607458%28v=vs.85%29.aspx).
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Active/Non-Optimized via internal redirection
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...............................................
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.............................................
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The Active-Standby configuration is simple to understand and setup,
|
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however, it might have serious interoperability issues, because not all
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@@ -1774,8 +1774,8 @@ served to initiator(s) (consider for simplicity that there is only one
|
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served device)
|
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|
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5. Connect to this SCST device through this internal target from the
|
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passive node. Now you have a local SCSI device on the passive side
|
||||
pointing to the active node.
|
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passive node, for instance, using iSCSI. Now you have a local SCSI
|
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device on the passive side pointing to the active node.
|
||||
|
||||
6. Export this local device to the initiator(s) using SCST
|
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*path-through* handler (scst_disk). Pass-though is needed to redirect
|
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@@ -1807,8 +1807,122 @@ on the new passive node.
|
||||
|
||||
6. Finish ALUA states change.
|
||||
|
||||
Example using direct sysfs interface could look like:
|
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|
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Active-Optimized node:
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||||
|
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modprobe scst
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modprobe scst_disk
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modprobe scst_vdisk
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||||
|
||||
# Main device, DRBD primary here
|
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echo "add_device aa filename=/dev/drbd1" >/sys/kernel/scst_tgt/handlers/vdisk_blockio/mgmt
|
||||
|
||||
# Redirect device, not used here. Coming from connecting via iSCSI to the
|
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# corresponding redirect target on the other side.
|
||||
DEVICE=10:0:0:0
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echo add_device $DEVICE >/sys/kernel/scst_tgt/handlers/dev_disk/mgmt
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||||
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service iscsi-scst start
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||||
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||||
# This is a regular, user-visible target
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echo "add_target iqn.2006-10.net.v:tgt " >/sys/kernel/scst_tgt/targets/iscsi/mgmt
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt/rel_tgt_id
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echo "add aa 0" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt/luns/mgmt
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# This is redirect target, 192.168.9.x is the redirect network
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echo "add_target iqn.2006-10.net.v:tgtR" >/sys/kernel/scst_tgt/targets/iscsi/mgmt
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echo 2 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/rel_tgt_id
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echo "add_target_attribute iqn.2006-10.net.v:tgtR allowed_portal 192.168.9.1" >/sys/kernel/scst_tgt/targets/iscsi/mgmt
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echo "1" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/forwarding
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echo "add aa 0" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/luns/mgmt
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt/enabled
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/enabled
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/enabled
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# ALUA config
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echo create aa >/sys/kernel/scst_tgt/device_groups/mgmt
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echo add aa >/sys/kernel/scst_tgt/device_groups/aa/devices/mgmt
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echo add tgt_a >/sys/kernel/scst_tgt/device_groups/aa/target_groups/mgmt
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echo add iqn.2006-10.net.v:tgt >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_a/mgmt
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echo 1 >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_a/group_id
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echo active >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_a/state
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echo add tgt_n >/sys/kernel/scst_tgt/device_groups/aa/target_groups/mgmt
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echo add iqn.2006-10.net.v:tgt1 >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_n/mgmt
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echo 2 >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_n/iqn.2006-10.net.v:tgt1/rel_tgt_id
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echo 2 >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_n/group_id
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echo nonoptimized >/sys/kernel/scst_tgt/device_groups/aa/target_groups/tgt_n/state
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Active-Non-Optimized node:
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modprobe scst
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modprobe scst_disk
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modprobe scst_vdisk
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|
||||
# Main device, DRBD secondary, not used here
|
||||
echo "add_device aa filename=/dev/drbd1" >/sys/kernel/scst_tgt/handlers/vdisk_blockio/mgmt
|
||||
|
||||
# Redirect device. Coming from connecting via iSCSI to the
|
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# corresponding redirect target on the other side.
|
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DEVICE=10:0:0:0
|
||||
echo add_device $DEVICE >/sys/kernel/scst_tgt/handlers/dev_disk/mgmt
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|
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service iscsi-scst start
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||||
|
||||
echo "add_target iqn.2006-10.net.v:tgt1" >/sys/kernel/scst_tgt/targets/iscsi/mgmt
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echo 2 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt1/rel_tgt_id
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echo "add $DEVICE 0" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt1/luns/mgmt
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# Redirect target, 192.168.9.x is the redirect network
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echo "add_target iqn.2006-10.net.v:tgtR" >/sys/kernel/scst_tgt/targets/iscsi/mgmt
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echo 2 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/rel_tgt_id
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echo "add_target_attribute iqn.2006-10.net.v:tgtR allowed_portal 192.168.9.2" >/sys/kernel/scst_tgt/targets/iscsi/mgmt
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echo "1" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/forwarding
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echo "add aa 0" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/luns/mgmt
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt1/enabled
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/enabled
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echo 1 >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgtR/enabled
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# ALUA config
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echo create $DEVICE >/sys/kernel/scst_tgt/device_groups/mgmt
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echo add $DEVICE >/sys/kernel/scst_tgt/device_groups/$DEVICE/devices/mgmt
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echo add tgt_a >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/mgmt
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echo add iqn.2006-10.net.v:tgt >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_a/mgmt
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echo 1 >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_a/iqn.2006-10.net.v:tgt/rel_tgt_id
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echo 1 >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_a/group_id
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echo active >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_a/state
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echo add tgt_n >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/mgmt
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echo add iqn.2006-10.net.v:tgt1 >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_n/mgmt
|
||||
echo 1 >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_n/group_id
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echo nonoptimized >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_n/state
|
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|
||||
ALUA state switch after DRBD primary-secondary transition:
|
||||
|
||||
Ex-Optimized:
|
||||
|
||||
echo "replace_no_ua $DEVICE 0" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt1/luns/mgmt
|
||||
echo nonoptimized >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_a/state
|
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echo active >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_n/state
|
||||
|
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Ex-Non-Optimized:
|
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|
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echo "replace_no_ua aa 0" >/sys/kernel/scst_tgt/targets/iscsi/iqn.2006-10.net.v:tgt1/luns/mgmt
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echo nonoptimized >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_a/state
|
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echo active >/sys/kernel/scst_tgt/device_groups/$DEVICE/target_groups/tgt_n/state
|
||||
|
||||
If you have any questions, please read this above text at least 3 times
|
||||
before asking. It might be tricky to understand.
|
||||
before asking. It might be tricky to understand :-)
|
||||
|
||||
|
||||
VAAI
|
||||
----
|
||||
|
||||
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