better doc and handling of portals

Signed-off-by: Travis Glenn Hansen <travisghansen@yahoo.com>

README.md

@@ -42,11 +42,13 @@ Predominantly 3 things are needed:
 - deploy the driver into the cluster (`helm` chart provided with sample
   `values.yaml`)
 
-## Guides
+## Community Guides
 
 - https://jonathangazeley.com/2021/01/05/using-truenas-to-provide-persistent-storage-for-kubernetes/
 - https://gist.github.com/admun/4372899f20421a947b7544e5fc9f9117 (migrating
   from `nfs-client-provisioner` to `democratic-csi`)
+- https://gist.github.com/deefdragon/d58a4210622ff64088bd62a5d8a4e8cc
+  (migrating between storage classes using `velero`)
 
 ## Node Prep
 

examples/freenas-iscsi.yaml

@@ -60,8 +60,9 @@ zfs:
   # 512, 1K, 2K, 4K, 8K, 16K, 64K, 128K default is 16K
   zvolBlocksize:
 iscsi:
-  targetPortal: "server:3261"
+  targetPortal: "server[:port]"
-  targetPortals: []
+  # for multipath
+  targetPortals: [] # [ "server[:port]", "server[:port]", ... ]
   # leave empty to omit usage of -I with iscsiadm
   interface:
 

examples/zfs-generic-iscsi.yaml

@@ -73,8 +73,10 @@ iscsi:
         # mutual CHAP
         #mutual_userid: "baz"
         #mutual_password: "bar"  
-  targetPortal: "server address"
+  targetPortal: "server[:port]"
-  targetPortals: []
+  # for multipath
+  targetPortals: [] # [ "server[:port]", "server[:port]", ... ]
+  # leave empty to omit usage of -I with iscsiadm
   interface: ""
 
   # MUST ensure uniqueness

src/driver/controller-zfs-generic/index.js

@@ -169,7 +169,9 @@ create /backstores/block/${iscsiName}
         volume_context = {
           node_attach_driver: "iscsi",
           portal: this.options.iscsi.targetPortal,
-          portals: this.options.iscsi.targetPortals.join(","),
+          portals: this.options.iscsi.targetPortals
+            ? this.options.iscsi.targetPortals.join(",")
+            : "",
           interface: this.options.iscsi.interface,
           iqn: iqn,
           lun: 0,

src/driver/freenas/index.js

@@ -1232,27 +1232,13 @@ class FreeNASDriver extends ControllerZfsSshBaseDriver {
           [FREENAS_ISCSI_ASSETS_NAME_PROPERTY_NAME]: iscsiName,
         });
 
-        // iscsiadm -m discovery -t st -p 172.21.26.81
-        // iscsiadm -m node -T iqn.2011-03.lan.bitness.istgt:test -p bitness.lan -l
-
-        // FROM driver config? no, node attachment should have everything required to remain independent
-        // portal
-        // portals
-        // interface
-        // chap discovery
-        // chap session
-
-        // FROM context
-        // iqn
-        // lun
-
         volume_context = {
           node_attach_driver: "iscsi",
           portal: this.options.iscsi.targetPortal,
-          portals: this.options.iscsi.targetPortals.join(","),
+          portals: this.options.iscsi.targetPortals
+            ? this.options.iscsi.targetPortals.join(",")
+            : "",
           interface: this.options.iscsi.interface || "",
-          //chapDiscoveryEnabled: this.options.iscsi.chapDiscoveryEnabled,
-          //chapSessionEnabled: this.options.iscsi.chapSessionEnabled,
           iqn: iqn,
           lun: 0,
         };