iscsi-vm-configs.tar

etc/iscsi/0000755000000000000000000000000014073724663011455 5ustar  rootrootetc/iscsi/iscsid.conf0000600000000000000000000002731614073724663013603 0ustar  rootroot#
# Open-iSCSI default configuration.
# Could be located at /etc/iscsi/iscsid.conf or ~/.iscsid.conf
#
# Note: To set any of these values for a specific node/session run
# the iscsiadm --mode node --op command for the value. See the README
# and man page for iscsiadm for details on the --op command.
#

######################
# iscsid daemon config
######################
# If you want iscsid to start the first time an iscsi tool
# needs to access it, instead of starting it when the init
# scripts run, set the iscsid startup command here. This
# should normally only need to be done by distro package
# maintainers.
#
# Default for Fedora and RHEL. (uncomment to activate).
# iscsid.startup = /etc/rc.d/init.d/iscsid force-start
# 
# Default for upstream open-iscsi scripts (uncomment to activate).
iscsid.startup = /sbin/iscsid

# Check for active mounts on devices reachable through a session
# and refuse to logout if there are any.  Defaults to "No".
# iscsid.safe_logout = Yes

#############################
# NIC/HBA and driver settings
#############################
# open-iscsi can create a session and bind it to a NIC/HBA.
# To set this up see the example iface config file.

#*****************
# Startup settings
#*****************

# To request that the iscsi initd scripts startup a session set to "automatic".
# xxx
node.startup = automatic
#
# To manually startup the session set to "manual". The default is manual.
# node.startup = manual

# For "automatic" startup nodes, setting this to "Yes" will try logins on each
# available iface until one succeeds, and then stop.  The default "No" will try
# logins on all available ifaces simultaneously.
node.leading_login = No

# *************
# CHAP Settings
# *************

# To enable CHAP authentication set node.session.auth.authmethod
# to CHAP. The default is None.
# xxx
node.session.auth.authmethod = CHAP

# To set a CHAP username and password for initiator
# authentication by the target(s), uncomment the following lines:
node.session.auth.username = iscsi-user
node.session.auth.password = password

# To set a CHAP username and password for target(s)
# authentication by the initiator, uncomment the following lines:
# node.session.auth.username_in = iscsi-user
# node.session.auth.password_in = password

# To enable CHAP authentication for a discovery session to the target
# set discovery.sendtargets.auth.authmethod to CHAP. The default is None.
# xxx
discovery.sendtargets.auth.authmethod = CHAP

# To set a discovery session CHAP username and password for the initiator
# authentication by the target(s), uncomment the following lines:
# discovery.sendtargets.auth.username = iscsi-user
# discovery.sendtargets.auth.password = password

# To set a discovery session CHAP username and password for target(s)
# authentication by the initiator, uncomment the following lines:
# discovery.sendtargets.auth.username_in = iscsi-target
# discovery.sendtargets.auth.password_in = password

# ********
# Timeouts
# ********
#
# See the iSCSI README's Advanced Configuration section for tips
# on setting timeouts when using multipath or doing root over iSCSI.
#
# To specify the length of time to wait for session re-establishment
# before failing SCSI commands back to the application when running
# the Linux SCSI Layer error handler, edit the line.
# The value is in seconds and the default is 120 seconds.
# Special values:
# - If the value is 0, IO will be failed immediately.
# - If the value is less than 0, IO will remain queued until the session
# is logged back in, or until the user runs the logout command.
# xxx
#node.session.timeo.replacement_timeout = 120
node.session.timeo.replacement_timeout = 15

# To specify the time to wait for login to complete, edit the line.
# The value is in seconds and the default is 15 seconds.
node.conn[0].timeo.login_timeout = 15

# To specify the time to wait for logout to complete, edit the line.
# The value is in seconds and the default is 15 seconds.
node.conn[0].timeo.logout_timeout = 15

# Time interval to wait for on connection before sending a ping.
node.conn[0].timeo.noop_out_interval = 5

# To specify the time to wait for a Nop-out response before failing
# the connection, edit this line. Failing the connection will
# cause IO to be failed back to the SCSI layer. If using dm-multipath
# this will cause the IO to be failed to the multipath layer.
node.conn[0].timeo.noop_out_timeout = 5

# To specify the time to wait for abort response before
# failing the operation and trying a logical unit reset edit the line.
# The value is in seconds and the default is 15 seconds.
node.session.err_timeo.abort_timeout = 15

# To specify the time to wait for a logical unit response
# before failing the operation and trying session re-establishment
# edit the line.
# The value is in seconds and the default is 30 seconds.
node.session.err_timeo.lu_reset_timeout = 30

# To specify the time to wait for a target response
# before failing the operation and trying session re-establishment
# edit the line.
# The value is in seconds and the default is 30 seconds.
node.session.err_timeo.tgt_reset_timeout = 30


#******
# Retry
#******

# To specify the number of times iscsid should retry a login
# if the login attempt fails due to the node.conn[0].timeo.login_timeout
# expiring modify the following line. Note that if the login fails
# quickly (before node.conn[0].timeo.login_timeout fires) because the network
# layer or the target returns an error, iscsid may retry the login more than
# node.session.initial_login_retry_max times.
#
# This retry count along with node.conn[0].timeo.login_timeout
# determines the maximum amount of time iscsid will try to
# establish the initial login. node.session.initial_login_retry_max is
# multiplied by the node.conn[0].timeo.login_timeout to determine the
# maximum amount.
#
# The default node.session.initial_login_retry_max is 8 and
# node.conn[0].timeo.login_timeout is 15 so we have:
#
# node.conn[0].timeo.login_timeout * node.session.initial_login_retry_max =
#								120 seconds
#
# Valid values are any integer value. This only
# affects the initial login. Setting it to a high value can slow
# down the iscsi service startup. Setting it to a low value can
# cause a session to not get logged into, if there are distuptions
# during startup or if the network is not ready at that time.
node.session.initial_login_retry_max = 4

################################
# session and device queue depth
################################

# To control how many commands the session will queue set
# node.session.cmds_max to an integer between 2 and 2048 that is also
# a power of 2. The default is 128.
node.session.cmds_max = 128

# To control the device's queue depth set node.session.queue_depth
# to a value between 1 and 1024. The default is 32.
node.session.queue_depth = 32

##################################
# MISC SYSTEM PERFORMANCE SETTINGS
##################################

# For software iscsi (iscsi_tcp) and iser (ib_iser) each session
# has a thread used to transmit or queue data to the hardware. For
# cxgb3i you will get a thread per host.
#
# Setting the thread's priority to a lower value can lead to higher throughput
# and lower latencies. The lowest value is -20. Setting the priority to
# a higher value, can lead to reduced IO performance, but if you are seeing
# the iscsi or scsi threads dominate the use of the CPU then you may want
# to set this value higher.
#
# Note: For cxgb3i you must set all sessions to the same value, or the
# behavior is not defined.
#
# The default value is -20. The setting must be between -20 and 20.
node.session.xmit_thread_priority = -20


#***************
# iSCSI settings
#***************

# To enable R2T flow control (i.e., the initiator must wait for an R2T
# command before sending any data), uncomment the following line:
#
#node.session.iscsi.InitialR2T = Yes
#
# To disable R2T flow control (i.e., the initiator has an implied
# initial R2T of "FirstBurstLength" at offset 0), uncomment the following line:
#
# The defaults is No.
node.session.iscsi.InitialR2T = No

#
# To disable immediate data (i.e., the initiator does not send
# unsolicited data with the iSCSI command PDU), uncomment the following line:
#
#node.session.iscsi.ImmediateData = No
#
# To enable immediate data (i.e., the initiator sends unsolicited data
# with the iSCSI command packet), uncomment the following line:
#
# The default is Yes
node.session.iscsi.ImmediateData = Yes

# To specify the maximum number of unsolicited data bytes the initiator
# can send in an iSCSI PDU to a target, edit the following line.
#
# The value is the number of bytes in the range of 512 to (2^24-1) and
# the default is 262144
node.session.iscsi.FirstBurstLength = 262144

# To specify the maximum SCSI payload that the initiator will negotiate
# with the target for, edit the following line.
#
# The value is the number of bytes in the range of 512 to (2^24-1) and
# the defauls it 16776192
node.session.iscsi.MaxBurstLength = 16776192

# To specify the maximum number of data bytes the initiator can receive
# in an iSCSI PDU from a target, edit the following line.
#
# The value is the number of bytes in the range of 512 to (2^24-1) and
# the default is 262144
node.conn[0].iscsi.MaxRecvDataSegmentLength = 262144

# To specify the maximum number of data bytes the initiator will send
# in an iSCSI PDU to the target, edit the following line.
#
# The value is the number of bytes in the range of 512 to (2^24-1).
# Zero is a special case. If set to zero, the initiator will use
# the target's MaxRecvDataSegmentLength for the MaxXmitDataSegmentLength.
# The default is 0.
node.conn[0].iscsi.MaxXmitDataSegmentLength = 0

# To specify the maximum number of data bytes the initiator can receive
# in an iSCSI PDU from a target during a discovery session, edit the
# following line.
#
# The value is the number of bytes in the range of 512 to (2^24-1) and
# the default is 32768
# 
discovery.sendtargets.iscsi.MaxRecvDataSegmentLength = 32768

# To allow the targets to control the setting of the digest checking,
# with the initiator requesting a preference of enabling the checking, uncomment# one or both of the following lines:
#node.conn[0].iscsi.HeaderDigest = CRC32C,None
#node.conn[0].iscsi.DataDigest = CRC32C,None
#
# To allow the targets to control the setting of the digest checking,
# with the initiator requesting a preference of disabling the checking,
# uncomment one or both of the following lines:
#node.conn[0].iscsi.HeaderDigest = None,CRC32C
#node.conn[0].iscsi.DataDigest = None,CRC32C
#
# To enable CRC32C digest checking for the header and/or data part of
# iSCSI PDUs, uncomment one or both of the following lines:
#node.conn[0].iscsi.HeaderDigest = CRC32C
#node.conn[0].iscsi.DataDigest = CRC32C
#
# To disable digest checking for the header and/or data part of
# iSCSI PDUs, uncomment one or both of the following lines:
#node.conn[0].iscsi.HeaderDigest = None
#node.conn[0].iscsi.DataDigest = None
#
# The default is to never use DataDigests or HeaderDigests.
#

# For multipath configurations, you may want more than one session to be
# created on each iface record.  If node.session.nr_sessions is greater
# than 1, performing a 'login' for that node will ensure that the
# appropriate number of sessions is created.
node.session.nr_sessions = 1

#************
# Workarounds
#************

# Some targets like IET prefer after an initiator has sent a task
# management function like an ABORT TASK or LOGICAL UNIT RESET, that
# it does not respond to PDUs like R2Ts. To enable this behavior uncomment
# the following line (The default behavior is Yes):
node.session.iscsi.FastAbort = Yes

# Some targets like Equalogic prefer that after an initiator has sent
# a task management function like an ABORT TASK or LOGICAL UNIT RESET, that
# it continue to respond to R2Ts. To enable this uncomment this line
# node.session.iscsi.FastAbort = No
etc/iscsi/initiatorname.iscsi0000600000000000000000000000052314071741573015341 0ustar  rootroot## DO NOT EDIT OR REMOVE THIS FILE!
## If you remove this file, the iSCSI daemon will not start.
## If you change the InitiatorName, existing access control lists
## may reject this initiator.  The InitiatorName must be unique
## for each iSCSI initiator.  Do NOT duplicate iSCSI InitiatorNames.
InitiatorName=iqn.2021-07.example.com:lun1
etc/iscsi/send_targets/0000600000000000000000000000000014073724402014113 5ustar  rootrootetc/iscsi/send_targets/192.168.56.1,3260/0000600000000000000000000000000014073730256015726 5ustar  rootrootetc/iscsi/send_targets/192.168.56.1,3260/st_config0000600000000000000000000000104214073730256017624 0ustar  rootroot# BEGIN RECORD 2.0-874
discovery.startup = manual
discovery.type = sendtargets
discovery.sendtargets.address = 192.168.56.1
discovery.sendtargets.port = 3260
discovery.sendtargets.auth.authmethod = CHAP
discovery.sendtargets.timeo.login_timeout = 15
discovery.sendtargets.use_discoveryd = No
discovery.sendtargets.discoveryd_poll_inval = 30
discovery.sendtargets.reopen_max = 5
discovery.sendtargets.timeo.auth_timeout = 45
discovery.sendtargets.timeo.active_timeout = 30
discovery.sendtargets.iscsi.MaxRecvDataSegmentLength = 32768
# END RECORD
etc/iscsi/send_targets/192.168.56.1,3260/iqn.2021-07.example.com:lun1,192.168.56.1,3260,1,default0000777000000000000000000000000014073730256037404 2/etc/iscsi/nodes/iqn.2021-07.example.com:lun1/192.168.56.1,3260,1ustar  rootrootetc/iscsi/nodes/0000600000000000000000000000000014073730256012545 5ustar  rootrootetc/iscsi/nodes/iqn.2021-07.example.com:lun1/0000600000000000000000000000000014073730256017244 5ustar  rootrootetc/iscsi/nodes/iqn.2021-07.example.com:lun1/192.168.56.1,3260,1/0000600000000000000000000000000014073730256021210 5ustar  rootrootetc/iscsi/nodes/iqn.2021-07.example.com:lun1/192.168.56.1,3260,1/default0000600000000000000000000000414314073730256022564 0ustar  rootroot# BEGIN RECORD 2.0-874
node.name = iqn.2021-07.example.com:lun1
node.tpgt = 1
node.startup = automatic
node.leading_login = No
iface.iscsi_ifacename = default
iface.transport_name = tcp
iface.vlan_id = 0
iface.vlan_priority = 0
iface.iface_num = 0
iface.mtu = 0
iface.port = 0
iface.tos = 0
iface.ttl = 0
iface.tcp_wsf = 0
iface.tcp_timer_scale = 0
iface.def_task_mgmt_timeout = 0
iface.erl = 0
iface.max_receive_data_len = 0
iface.first_burst_len = 0
iface.max_outstanding_r2t = 0
iface.max_burst_len = 0
node.discovery_address = 192.168.56.1
node.discovery_port = 3260
node.discovery_type = send_targets
node.session.initial_cmdsn = 0
node.session.initial_login_retry_max = 4
node.session.xmit_thread_priority = -20
node.session.cmds_max = 128
node.session.queue_depth = 32
node.session.nr_sessions = 1
node.session.auth.authmethod = CHAP
node.session.auth.username = iscsi-user
node.session.auth.password = password
node.session.timeo.replacement_timeout = 15
node.session.err_timeo.abort_timeout = 15
node.session.err_timeo.lu_reset_timeout = 30
node.session.err_timeo.tgt_reset_timeout = 30
node.session.err_timeo.host_reset_timeout = 60
node.session.iscsi.FastAbort = Yes
node.session.iscsi.InitialR2T = No
node.session.iscsi.ImmediateData = Yes
node.session.iscsi.FirstBurstLength = 262144
node.session.iscsi.MaxBurstLength = 16776192
node.session.iscsi.DefaultTime2Retain = 0
node.session.iscsi.DefaultTime2Wait = 2
node.session.iscsi.MaxConnections = 1
node.session.iscsi.MaxOutstandingR2T = 1
node.session.iscsi.ERL = 0
node.conn[0].address = 192.168.56.1
node.conn[0].port = 3260
node.conn[0].startup = manual
node.conn[0].tcp.window_size = 524288
node.conn[0].tcp.type_of_service = 0
node.conn[0].timeo.logout_timeout = 15
node.conn[0].timeo.login_timeout = 15
node.conn[0].timeo.auth_timeout = 45
node.conn[0].timeo.noop_out_interval = 5
node.conn[0].timeo.noop_out_timeout = 5
node.conn[0].iscsi.MaxXmitDataSegmentLength = 0
node.conn[0].iscsi.MaxRecvDataSegmentLength = 262144
node.conn[0].iscsi.HeaderDigest = None
node.conn[0].iscsi.DataDigest = None
node.conn[0].iscsi.IFMarker = No
node.conn[0].iscsi.OFMarker = No
# END RECORD
etc/iscsi/initiatorname.iscsi~0000600000000000000000000000061014071733435015532 0ustar  rootroot## DO NOT EDIT OR REMOVE THIS FILE!
## If you remove this file, the iSCSI daemon will not start.
## If you change the InitiatorName, existing access control lists
## may reject this initiator.  The InitiatorName must be unique
## for each iSCSI initiator.  Do NOT duplicate iSCSI InitiatorNames.
InitiatorName=iqn.1993-08.org.debian:01:e22b41cf3756
InitiatorName=iqn.2021-07.example.com:lun1
etc/iscsi/iscsid.conf~0000600000000000000000000002721114071743761013771 0ustar  rootroot#
# Open-iSCSI default configuration.
# Could be located at /etc/iscsi/iscsid.conf or ~/.iscsid.conf
#
# Note: To set any of these values for a specific node/session run
# the iscsiadm --mode node --op command for the value. See the README
# and man page for iscsiadm for details on the --op command.
#

######################
# iscsid daemon config
######################
# If you want iscsid to start the first time an iscsi tool
# needs to access it, instead of starting it when the init
# scripts run, set the iscsid startup command here. This
# should normally only need to be done by distro package
# maintainers.
#
# Default for Fedora and RHEL. (uncomment to activate).
# iscsid.startup = /etc/rc.d/init.d/iscsid force-start
# 
# Default for upstream open-iscsi scripts (uncomment to activate).
iscsid.startup = /sbin/iscsid

# Check for active mounts on devices reachable through a session
# and refuse to logout if there are any.  Defaults to "No".
# iscsid.safe_logout = Yes

#############################
# NIC/HBA and driver settings
#############################
# open-iscsi can create a session and bind it to a NIC/HBA.
# To set this up see the example iface config file.

#*****************
# Startup settings
#*****************

# To request that the iscsi initd scripts startup a session set to "automatic".
node.startup = automatic
#
# To manually startup the session set to "manual". The default is manual.
# node.startup = manual

# For "automatic" startup nodes, setting this to "Yes" will try logins on each
# available iface until one succeeds, and then stop.  The default "No" will try
# logins on all available ifaces simultaneously.
node.leading_login = No

# *************
# CHAP Settings
# *************

# To enable CHAP authentication set node.session.auth.authmethod
# to CHAP. The default is None.
#node.session.auth.authmethod = CHAP

# To set a CHAP username and password for initiator
# authentication by the target(s), uncomment the following lines:
#node.session.auth.username = username
#node.session.auth.password = password

# To set a CHAP username and password for target(s)
# authentication by the initiator, uncomment the following lines:
#node.session.auth.username_in = username_in
#node.session.auth.password_in = password_in

# To enable CHAP authentication for a discovery session to the target
# set discovery.sendtargets.auth.authmethod to CHAP. The default is None.
#discovery.sendtargets.auth.authmethod = CHAP

# To set a discovery session CHAP username and password for the initiator
# authentication by the target(s), uncomment the following lines:
#discovery.sendtargets.auth.username = username
#discovery.sendtargets.auth.password = password

# To set a discovery session CHAP username and password for target(s)
# authentication by the initiator, uncomment the following lines:
#discovery.sendtargets.auth.username_in = username_in
#discovery.sendtargets.auth.password_in = password_in

# ********
# Timeouts
# ********
#
# See the iSCSI README's Advanced Configuration section for tips
# on setting timeouts when using multipath or doing root over iSCSI.
#
# To specify the length of time to wait for session re-establishment
# before failing SCSI commands back to the application when running
# the Linux SCSI Layer error handler, edit the line.
# The value is in seconds and the default is 120 seconds.
# Special values:
# - If the value is 0, IO will be failed immediately.
# - If the value is less than 0, IO will remain queued until the session
# is logged back in, or until the user runs the logout command.
node.session.timeo.replacement_timeout = 120

# To specify the time to wait for login to complete, edit the line.
# The value is in seconds and the default is 15 seconds.
node.conn[0].timeo.login_timeout = 15

# To specify the time to wait for logout to complete, edit the line.
# The value is in seconds and the default is 15 seconds.
node.conn[0].timeo.logout_timeout = 15

# Time interval to wait for on connection before sending a ping.
node.conn[0].timeo.noop_out_interval = 5

# To specify the time to wait for a Nop-out response before failing
# the connection, edit this line. Failing the connection will
# cause IO to be failed back to the SCSI layer. If using dm-multipath
# this will cause the IO to be failed to the multipath layer.
node.conn[0].timeo.noop_out_timeout = 5

# To specify the time to wait for abort response before
# failing the operation and trying a logical unit reset edit the line.
# The value is in seconds and the default is 15 seconds.
node.session.err_timeo.abort_timeout = 15

# To specify the time to wait for a logical unit response
# before failing the operation and trying session re-establishment
# edit the line.
# The value is in seconds and the default is 30 seconds.
node.session.err_timeo.lu_reset_timeout = 30

# To specify the time to wait for a target response
# before failing the operation and trying session re-establishment
# edit the line.
# The value is in seconds and the default is 30 seconds.
node.session.err_timeo.tgt_reset_timeout = 30


#******
# Retry
#******

# To specify the number of times iscsid should retry a login
# if the login attempt fails due to the node.conn[0].timeo.login_timeout
# expiring modify the following line. Note that if the login fails
# quickly (before node.conn[0].timeo.login_timeout fires) because the network
# layer or the target returns an error, iscsid may retry the login more than
# node.session.initial_login_retry_max times.
#
# This retry count along with node.conn[0].timeo.login_timeout
# determines the maximum amount of time iscsid will try to
# establish the initial login. node.session.initial_login_retry_max is
# multiplied by the node.conn[0].timeo.login_timeout to determine the
# maximum amount.
#
# The default node.session.initial_login_retry_max is 8 and
# node.conn[0].timeo.login_timeout is 15 so we have:
#
# node.conn[0].timeo.login_timeout * node.session.initial_login_retry_max =
#								120 seconds
#
# Valid values are any integer value. This only
# affects the initial login. Setting it to a high value can slow
# down the iscsi service startup. Setting it to a low value can
# cause a session to not get logged into, if there are distuptions
# during startup or if the network is not ready at that time.
node.session.initial_login_retry_max = 8

################################
# session and device queue depth
################################

# To control how many commands the session will queue set
# node.session.cmds_max to an integer between 2 and 2048 that is also
# a power of 2. The default is 128.
node.session.cmds_max = 128

# To control the device's queue depth set node.session.queue_depth
# to a value between 1 and 1024. The default is 32.
node.session.queue_depth = 32

##################################
# MISC SYSTEM PERFORMANCE SETTINGS
##################################

# For software iscsi (iscsi_tcp) and iser (ib_iser) each session
# has a thread used to transmit or queue data to the hardware. For
# cxgb3i you will get a thread per host.
#
# Setting the thread's priority to a lower value can lead to higher throughput
# and lower latencies. The lowest value is -20. Setting the priority to
# a higher value, can lead to reduced IO performance, but if you are seeing
# the iscsi or scsi threads dominate the use of the CPU then you may want
# to set this value higher.
#
# Note: For cxgb3i you must set all sessions to the same value, or the
# behavior is not defined.
#
# The default value is -20. The setting must be between -20 and 20.
node.session.xmit_thread_priority = -20


#***************
# iSCSI settings
#***************

# To enable R2T flow control (i.e., the initiator must wait for an R2T
# command before sending any data), uncomment the following line:
#
#node.session.iscsi.InitialR2T = Yes
#
# To disable R2T flow control (i.e., the initiator has an implied
# initial R2T of "FirstBurstLength" at offset 0), uncomment the following line:
#
# The defaults is No.
node.session.iscsi.InitialR2T = No

#
# To disable immediate data (i.e., the initiator does not send
# unsolicited data with the iSCSI command PDU), uncomment the following line:
#
#node.session.iscsi.ImmediateData = No
#
# To enable immediate data (i.e., the initiator sends unsolicited data
# with the iSCSI command packet), uncomment the following line:
#
# The default is Yes
node.session.iscsi.ImmediateData = Yes

# To specify the maximum number of unsolicited data bytes the initiator
# can send in an iSCSI PDU to a target, edit the following line.
#
# The value is the number of bytes in the range of 512 to (2^24-1) and
# the default is 262144
node.session.iscsi.FirstBurstLength = 262144

# To specify the maximum SCSI payload that the initiator will negotiate
# with the target for, edit the following line.
#
# The value is the number of bytes in the range of 512 to (2^24-1) and
# the defauls it 16776192
node.session.iscsi.MaxBurstLength = 16776192

# To specify the maximum number of data bytes the initiator can receive
# in an iSCSI PDU from a target, edit the following line.
#
# The value is the number of bytes in the range of 512 to (2^24-1) and
# the default is 262144
node.conn[0].iscsi.MaxRecvDataSegmentLength = 262144

# To specify the maximum number of data bytes the initiator will send
# in an iSCSI PDU to the target, edit the following line.
#
# The value is the number of bytes in the range of 512 to (2^24-1).
# Zero is a special case. If set to zero, the initiator will use
# the target's MaxRecvDataSegmentLength for the MaxXmitDataSegmentLength.
# The default is 0.
node.conn[0].iscsi.MaxXmitDataSegmentLength = 0

# To specify the maximum number of data bytes the initiator can receive
# in an iSCSI PDU from a target during a discovery session, edit the
# following line.
#
# The value is the number of bytes in the range of 512 to (2^24-1) and
# the default is 32768
# 
discovery.sendtargets.iscsi.MaxRecvDataSegmentLength = 32768

# To allow the targets to control the setting of the digest checking,
# with the initiator requesting a preference of enabling the checking, uncomment# one or both of the following lines:
#node.conn[0].iscsi.HeaderDigest = CRC32C,None
#node.conn[0].iscsi.DataDigest = CRC32C,None
#
# To allow the targets to control the setting of the digest checking,
# with the initiator requesting a preference of disabling the checking,
# uncomment one or both of the following lines:
#node.conn[0].iscsi.HeaderDigest = None,CRC32C
#node.conn[0].iscsi.DataDigest = None,CRC32C
#
# To enable CRC32C digest checking for the header and/or data part of
# iSCSI PDUs, uncomment one or both of the following lines:
#node.conn[0].iscsi.HeaderDigest = CRC32C
#node.conn[0].iscsi.DataDigest = CRC32C
#
# To disable digest checking for the header and/or data part of
# iSCSI PDUs, uncomment one or both of the following lines:
#node.conn[0].iscsi.HeaderDigest = None
#node.conn[0].iscsi.DataDigest = None
#
# The default is to never use DataDigests or HeaderDigests.
#

# For multipath configurations, you may want more than one session to be
# created on each iface record.  If node.session.nr_sessions is greater
# than 1, performing a 'login' for that node will ensure that the
# appropriate number of sessions is created.
node.session.nr_sessions = 1

#************
# Workarounds
#************

# Some targets like IET prefer after an initiator has sent a task
# management function like an ABORT TASK or LOGICAL UNIT RESET, that
# it does not respond to PDUs like R2Ts. To enable this behavior uncomment
# the following line (The default behavior is Yes):
node.session.iscsi.FastAbort = Yes

# Some targets like Equalogic prefer that after an initiator has sent
# a task management function like an ABORT TASK or LOGICAL UNIT RESET, that
# it continue to respond to R2Ts. To enable this uncomment this line
# node.session.iscsi.FastAbort = No
etc/iscsi/ifaces/0000600000000000000000000000000014073715533012670 5ustar  rootrootroot/localinfo.txt0000644000000000000000000001675014073741473013271 0ustar  rootroot2021.0703 Original project was started with ubuntu 20.04 but DL size over 1.1GB
[ 1397.823698] ZFS: Loaded module v2.1.0-1, ZFS pool version 5000, ZFS filesystem version 5
zfs-2.1.0-1 / zfs-kmod-2.1.0-1

NOTE snapd and firefox and most of gnome* were uninstalled to save space
replaced with icewm and lightdm

/etc/lightdm/lightdm.conf.d was modified for icewm autologin

home/user/.icewm/startup was mod

==========

debian 10.10 had X issues with vbox guest adds (black screen)

==========

2021.0703 restarted project with devuan 3.1
+ mod /etc/slim.conf for autologin

apt-get remove --purge firefox-esr openjdk* libreoffice* gimp gimp-data \
 gstreamer* mesa-vdpau-drivers mesa-va-drivers cups* xscreensaver* ristretto \
 debian-faq libwebkit2gtk-4.0-37 synaptic guile-2.2-libs libjs-mathjax orca \
 


[ 1522.021096] ZFS: Loaded module v2.1.0-1, ZFS pool version 5000, ZFS filesystem version 5
zfs-2.1.0-1 / zfs-kmod-2.1.0-1

+ installed multipath-tools

2021.0708 DONE attempting iscsi - REF: https://www.howtoforge.com/tutorial/how-to-setup-iscsi-storage-server-on-ubuntu-2004-lts/
iscsi REF: https://linuxlasse.net/linux/howtos/ISCSI_and_ZFS_ZVOL
[[
apt-get install open-iscsi -y

iscsiadm -m discovery -t st -p 192.168.56.1

jstar /etc/iscsi/initiatorname.iscsi

jstar /etc/iscsi/nodes/iqn.2021-07.example.com\:lun1/192.168.56.1\,3260\,1/default

##systemctl restart open-iscsi iscsid

# service open-iscsi restart
[....] Umounting iSCSI filesystems:Unmounting all devices marked _netdev
. ok 
[....] Disconnecting iSCSI targets:iscsiadm: No matching sessions found
. ok 
[....] Setting up iSCSI targets:
Logging in to [iface: default, target: iqn.2021-07.example.com:lun1, portal: 192.168.56.1,3260] (multiple)
Login to [iface: default, target: iqn.2021-07.example.com:lun1, portal: 192.168.56.1,3260] successful.
. ok 

# service iscsid restart
[ ok ] Restarting iSCSI initiator daemon: iscsid.

# iscsiadm -m session -o show
tcp: [1] 192.168.56.1:3260,1 iqn.2021-07.example.com:lun1 (non-flash)

NOTE sdz is the 4GB iscsi

NOTE iscsi does not show up in 'blkid' but does in 'lsblk' and 'dmesg'

grep ^InitiatorName /etc/iscsi/initiatorname.iscsi 
]]

FIX after reboot, iscsi not finding; edit /etc/iscsi/nodes/iqn.2021-07.example.com:lun1/192.168.56.1,3260,1/default 
and put back in:
[[
node.session.auth.authmethod = CHAP  
node.session.auth.username = iscsi-user
node.session.auth.password = password          
node.session.auth.username_in = iscsi-target
node.session.auth.password_in = secretpass         
node.startup = automatic
]]

FIX /etc/iscsi/iscsi.conf 

FIX /etc/rcS.d -- mv S14iscsid S17
/etc/rcS.d# mv S14iscsid S17iscsid
/etc/rcS.d# mv S15open-iscsi S18open-iscsi

2021.0714 + installed pkg webmin for iscsi mgmt (port 10000)
[[
Webmin install complete. You can now login to https://devuanzfstest:10000/
as root with your root password, or as any user who can use sudo
to run commands as root.
]]

2021.0714 FIX webmin not connecting to iscsi - had to stop open-iscsi daemon and clear cache: http://kb.unixservertech.com/unix/linux/iscsi_tricks_and_techniques
FIX rc.local login all scsi nodes b4 zfs!

FIX xfce session, remove wicd from startup

icsi device naming:
[[
ls -lR /dev/disk|grep sdaa
lrwxrwxrwx 1 root root 10 Jul 14 22:51 scsi-1IET_00010002 -> ../../sdaa
lrwxrwxrwx 1 root root 10 Jul 14 22:51 scsi-33000000100000002 -> ../../sdaa
lrwxrwxrwx 1 root root 10 Jul 14 22:51 scsi-360000000000000000e00000000010002 -> ../../sdaa
lrwxrwxrwx 1 root root 10 Jul 14 22:51 scsi-SIET_VIRTUAL-DISK_beaf12 -> ../../sdaa
lrwxrwxrwx 1 root root 10 Jul 14 22:51 wwn-0x60000000000000000e00000000010002 -> ../../sdaa
lrwxrwxrwx 1 root root 10 Jul 14 22:51 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-2 -> ../../sdaa

ls -lR /dev/disk|grep sdz|grep -v part
lrwxrwxrwx 1 root root  9 Jul 14 22:51 scsi-1IET_00010001 -> ../../sdz
lrwxrwxrwx 1 root root  9 Jul 14 22:51 scsi-33000000100000001 -> ../../sdz
lrwxrwxrwx 1 root root  9 Jul 14 22:51 scsi-360000000000000000e00000000010001 -> ../../sdz
lrwxrwxrwx 1 root root  9 Jul 14 22:51 scsi-SIET_VIRTUAL-DISK_beaf11 -> ../../sdz
lrwxrwxrwx 1 root root  9 Jul 14 22:51 wwn-0x60000000000000000e00000000010001 -> ../../sdz
lrwxrwxrwx 1 root root 10 Jul 14 22:51 iscsi-z -> ../../sdz5
lrwxrwxrwx 1 root root 10 Jul 14 22:51 4ad6631d-01 -> ../../sdz1
lrwxrwxrwx 1 root root 10 Jul 14 22:51 4ad6631d-05 -> ../../sdz5
lrwxrwxrwx 1 root root  9 Jul 14 22:51 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-1 -> ../../sdz
lrwxrwxrwx 1 root root 10 Jul 14 22:51 39a63b59-9e6b-43fe-9d89-ac662094eb38 -> ../../sdz5
]]

2021.0714 SUCCESS - pool with iscsi spare survived a reboot!

iscsi disk/by-path:
[[
/dev/disk/by-path# l|sort -k 11
lrwxrwxrwx 1 root root   9 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-1 -> ../../sdz
lrwxrwxrwx 1 root root  10 Jul 14 23:22 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-2 -> ../../sdab
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-3 -> ../../sdac
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-4 -> ../../sdad
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-5 -> ../../sdae
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-6 -> ../../sdaf
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-7 -> ../../sdag
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-8 -> ../../sdah
lrwxrwxrwx 1 root root  10 Jul 14 23:22 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-9 -> ../../sdai
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-10 -> ../../sdaj
lrwxrwxrwx 1 root root  10 Jul 14 23:22 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-11 -> ../../sdak
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-12 -> ../../sdal
lrwxrwxrwx 1 root root  10 Jul 14 23:22 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-13 -> ../../sdam
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-14 -> ../../sdan
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-15 -> ../../sdao
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-16 -> ../../sdap
lrwxrwxrwx 1 root root  10 Jul 14 23:22 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-17 -> ../../sdaq
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-18 -> ../../sdar
lrwxrwxrwx 1 root root  10 Jul 14 23:22 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-19 -> ../../sdas
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-20 -> ../../sdat
lrwxrwxrwx 1 root root  10 Jul 14 23:22 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-21 -> ../../sdau
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-22 -> ../../sdav
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-23 -> ../../sdaw
lrwxrwxrwx 1 root root  10 Jul 14 23:23 ip-192.168.56.1:3260-iscsi-iqn.2021-07.example.com:lun1-lun-24 -> ../../sdax

zpool create -o autoreplace=on -o autoexpand=on -O atime=off -O compression=zstd-3 zdraidtest \
  draid1:6d:24'c':4's' sda{b..x} sdz