CentOS 7 iSCSI Howto

#Create iSCSI in Firewall
firewall-cmd --permanent --new-service=iscsi-target

#Edit /etc/firewalld/services/iscsi-target.xml to allow 3260/tcp

#Reload the complete firewall to enable the created service
firewall-cmd --complete-reload

#Add the rule to the firewall zone
sudo firewall-cmd --permanent --zone=public --add-service=iscsi-target

#And reload the firewall
sudo firewall-cmd --reload

#Check if firewall is updated
sudo iptables -nvL | grep 3260

# Create iSCSI Block Device of 200GB
zfs create -V 200g zfs/erik-desktop-iscsiblockdevice01.iscsi /dev/zvol/zfs/erik-desktop-iscsiblockdevice01.iscsi

#Store the iSCSI files in a certain place
zfs create zfs/iscsifs

#Install the iSCSI commandline for admining the iSCSI sub system. Modules are built-in the kernel already
yum install targetcli

#Enter the iSCSI sub system
targetcli

#Create the storage with fileio
cd /backstores/fileio/
create name=erik-desktop-iscsi01 file_or_dev=/zfs/iscsifs/erik-desktop-iscsi01.iscsi size=10G

#Create the storage with block device
cd /backstores/block
create name=erik-desktop-iscsiblockdevice01.iscsi dev=/dev/zvol/zfs/erik-desktop-iscsiblockdevice01.iscsi

#Move to the iSCSI
cd /iscsi

#Create target
create iqn.2015-02.nl.eastnet.zastron:sn.iscsifs

#Create LUN
cd iqn.2015-02.nl.eastnet.zastron:sn.iscsifs
cd tpg1/luns
create /backstores/fileio/erik-desktop-iscsi01

#Setup access permissions
cd ../acls
# does not work:
create iqn.2015-02.nl.eastnet:erik-desktop
# this will work
create iqn.1991-05.com.microsoft:erik-desktop

#Create portal
cd ../portals
create
Using default IP port 3260
Binding to INADDR_ANY (0.0.0.0)
Created network portal 0.0.0.0:3260.

#Logging
/var/log/messages