Add iscsi role and docs

Since iscsi supports luks + btrfs over the network and makes for an
amazing networked backup drive we should include that in our default
config.

README.md

@@ -65,9 +65,13 @@ btrfs send -p $SNAPSHOT_DIR/$LATEST $SNAPSHOT_DIR/$SNAPSHOT_NAME | btrfs receive
 find /.snapshots -maxdepth 1 -type d -not -path /.snapshots -exec sudo btrfs subvolume delete {} \;
 ```
 
-# Luks
+## Luks
 
 ```bash
+# Create an encrypted drive
+sudo cryptsetup luksFormat
+
+
 # LUKS Disk Encryption can use up to 8 key slots to store passwords. We can use these keys to auto mount LUKS device.
 # cryptsetup luksDump /dev/sda
 
@@ -101,3 +105,18 @@ sudo cryptsetup luksOpen /dev/disk/by-uuid/1d7ce570-e695-47a0-9dda-5f14b5b20e21
 # close (or fix issues)
 sudo cryptsetup luksClose backup0
 ```
+
+## ISCSI
+
+```bash
+# Login to portal
+sudo iscsiadm -m discovery -t sendtargets -p freenas.dnet
+
+# Mount all targets
+sudo iscsiadm -m node -l
+
+# Mount at boot
+vim /etc/iscsi/nodes/iqn.2022-02.freenas.dnet:manjaro-backup/10.1.2.200,3260,1
+
+node.startup = automatic
+```