Add enable_iscsi option to etc/kolla/globals.yml

To use Cinder LVM2 backend with iSCSI,
add enable_iscsi option and fix document.

Change-Id: I286733508b5582c311c313c172b3c3a774be993c
Closes-Bug: #1599088

ansible/roles/cinder/templates/cinder.conf.j2

@@ -76,7 +76,7 @@ rabbit_hosts = {% for host in groups['rabbitmq'] %}{{ hostvars[host]['ansible_'
 volume_group = {{ cinder_volume_group }}
 volume_driver = cinder.volume.drivers.lvm.LVMVolumeDriver
 volume_backend_name = {{ cinder_volume_backend_name }}
-iscsi_ip_address = {{ cinder_iscsi_ip_address }}
+iscsi_ip_address = {{ hostvars[groups['tgtd'][0]]['ansible_' + hostvars[groups['tgtd'][0]]['storage_interface']]['ipv4']['address'] }}
 iscsi_helper = {{ cinder_iscsi_helper }}
 iscsi_protocol = {{ cinder_iscsi_protocol }}
 {% elif cinder_volume_driver == "ceph" %}

doc/cinder-guide.rst

@@ -98,13 +98,13 @@ between nova-compute process and the server hosting LVG.
 In order to use iSCSI as a Cinder's backend, these two parameters must be
 specified in ``globals.yml``. ::
 
-    cinder_iscsi_ip_address: "X.X.X.X"
+    enable_iscsi: "yes"
+
     cinder_volume_group: << lvg_name >>
 
 
-Where: 
+Where:
 
-- X.X.X.X - is IP address of a server hosting LVG
 - ``lvg_name`` - is a name of LVG on that server.
 
 NOTE: For Ubuntu and LVM2/iSCSI

etc/kolla/globals.yml

@@ -114,6 +114,7 @@ neutron_external_interface: "eth1"
 #enable_heat: "yes"
 #enable_horizon: "yes"
 #enable_ironic: "no"
+#enable_iscsi: "no"
 #enable_magnum: "no"
 #enable_manila: "no"
 #enable_mistral: "no"
@@ -144,7 +145,6 @@ neutron_external_interface: "eth1"
 # Cinder's iSCSI backend !!!REQUIRES!!! two parameters:
 # 1 - IP address of the server hosting LVM Volume group
 # 2 - The name of Volume group which Cinder will use.
-#cinder_iscsi_ip_address:
 #cinder_volume_group: