Cinder adoption iscsi steps

As done for NetApp NFS, this patch adds the steps required for iscsi
protocol, which is already tested via test suite.
In addition, it removes the iSCSI limitation that shouldn't be Tech
preview anymore.

Signed-off-by: Francesco Pantano <[email protected]>

Author: fmount

docs_user/modules/con_adoption-limitations.adoc

@@ -11,7 +11,7 @@ Technology Preview::
 The following features are Technology Previews and have not been tested within the context of the {rhos_long_noacro} adoption:
 +
 * NFS Ganesha back end for {rhos_component_storage_file_first_ref}
-* iSCSI and FC-based drivers for {block_storage_first_ref}
+* FC-based drivers for {block_storage_first_ref}
 * {block_storage} back end for the {image_service_first_ref}
 +
 The following {compute_service_first_ref} features are Technology Previews:

docs_user/modules/proc_adopting-the-block-storage-service.adoc

@@ -168,9 +168,8 @@ Ensure that you use the same configuration group name for the driver that you us
 ====
 +
 . Configure the NetApp NFS Block Storage volume service:
-.. Create secrets that include sensitive information such as hostnames, passwords, and usernames to access the third-party NetApp NFS storage. You can find the credentials in the `cinder.conf` file that was generated from the {OpenStackPreviousInstaller} deployment.
+.. Create a secret that includes sensitive information such as hostnames, passwords, and usernames to access the third-party NetApp NFS storage. You can find the credentials in the `cinder.conf` file that was generated from the {OpenStackPreviousInstaller} deployment:
 +
-[source,yaml]
 ----
 $ oc apply -f - <<EOF
 apiVersion: v1
@@ -198,7 +197,9 @@ EOF
 $ oc patch openstackcontrolplane openstack --type=merge --patch-file=<cinder_netappNFS.patch>
 ----
 +
-* The following example shows a `cinder_netappNFS.patch` file that configures a NetApp NFS Block Storage volume service:
+* Replace `<cinder_netappNFS.patch>` with the name of the patch file for your NetApp NFS Block Storage volume back end.
++
+The following example shows a `cinder_netappNFS.patch` file that configures a NetApp NFS Block Storage volume service:
 +
 [source,yaml]
 ----
@@ -224,6 +225,59 @@ spec:
           customServiceConfigSecrets:
           - cinder-volume-ontap-secrets
 ----
++
+. Configure the NetApp iSCSI Block Storage volume service:
+.. Create a secret that includes sensitive information such as hostnames, passwords, and usernames to access the third-party NetApp iSCSI storage. You can find the credentials in the `cinder.conf` file that was generated from the {OpenStackPreviousInstaller} deployment:
++
+----
+$ oc apply -f - <<EOF
+apiVersion: v1
+kind: Secret
+metadata:
+  labels:
+    service: cinder
+    component: cinder-volume
+  name: cinder-volume-ontap-secrets
+type: Opaque
+stringData:
+  ontap-cinder-secrets: |
+    [tripleo_netapp]
+    netapp_server_hostname = netapp_host
+    netapp_login = netapp_username
+    netapp_password = netapp_password
+    netapp_vserver = netapp_vserver
+    netapp_pool_name_search_pattern=(netapp_poolpattern)
+EOF
+----
+. Patch the `OpenStackControlPlane` custom resource (CR) to deploy the NetApp iSCSI Block Storage volume back end:
++
+----
+$ oc patch openstackcontrolplane openstack --type=merge --patch-file=<cinder_netappISCSI.patch>
+----
++
+* Replace `<cinder_netappISCSI.patch>` with the name of the patch file for your NetApp iSCSI Block Storage volume back end.
++
+The following example shows a `cinder_netappISCSI.patch` file that configures a NetApp iSCSI Block Storage volume service:
++
+----
+spec:
+  cinder:
+    enabled: true
+    template:
+      cinderVolumes:
+        ontap-iscsi:
+          networkAttachments:
+            - storage
+          customServiceConfig: |
+            [tripleo_netapp]
+            volume_backend_name=ontap-iscsi
+            volume_driver=cinder.volume.drivers.netapp.common.NetAppDriver
+            netapp_storage_protocol=iscsi
+            netapp_storage_family=ontap_cluster
+            consistencygroup_support=True
+          customServiceConfigSecrets:
+            - cinder-volume-ontap-secrets
+----
 . Check if all the services are up and running:
 +
 ----