Merge pull request #785 from srvg/bug/openiscsi-emptylist

open_iscsi: return devicenodes as empty list if no LUN's

system/open_iscsi.py

@@ -108,6 +108,7 @@ import time
 
 ISCSIADM = 'iscsiadm'
 
+
 def compare_nodelists(l1, l2):
 
     l1.sort()
@@ -159,7 +160,7 @@ def target_loggedon(module, target):
 
     cmd = '%s --mode session' % iscsiadm_cmd
     (rc, out, err) = module.run_command(cmd)
-    
+
     if rc == 0:
         return target in out
     elif rc == 21:
@@ -186,7 +187,7 @@ def target_login(module, target):
 
     cmd = '%s --mode node --targetname %s --login' % (iscsiadm_cmd, target)
     (rc, out, err) = module.run_command(cmd)
-    
+
     if rc > 0:
         module.fail_json(cmd=cmd, rc=rc, msg=err)
 
@@ -195,7 +196,7 @@ def target_logout(module, target):
 
     cmd = '%s --mode node --targetname %s --logout' % (iscsiadm_cmd, target)
     (rc, out, err) = module.run_command(cmd)
-    
+
     if rc > 0:
         module.fail_json(cmd=cmd, rc=rc, msg=err)
 
@@ -206,25 +207,22 @@ def target_device_node(module, target):
     # a given target...
 
     devices = glob.glob('/dev/disk/by-path/*%s*' % target)
-    if len(devices) == 0:
-        return None
-    else:
-        devdisks = []
-        for dev in devices:
-            # exclude partitions
-            if "-part" not in dev:
-                devdisk = os.path.realpath(dev)
-                # only add once (multi-path?)
-                if devdisk not in devdisks:
-                    devdisks.append(devdisk)
-        return devdisks
+    devdisks = []
+    for dev in devices:
+        # exclude partitions
+        if "-part" not in dev:
+            devdisk = os.path.realpath(dev)
+            # only add once (multi-path?)
+            if devdisk not in devdisks:
+                devdisks.append(devdisk)
+    return devdisks
 
 
 def target_isauto(module, target):
 
     cmd = '%s --mode node --targetname %s' % (iscsiadm_cmd, target)
     (rc, out, err) = module.run_command(cmd)
-    
+
     if rc == 0:
         lines = out.splitlines()
         for line in lines:
@@ -239,7 +237,7 @@ def target_setauto(module, target):
 
     cmd = '%s --mode node --targetname %s --op=update --name node.startup --value automatic' % (iscsiadm_cmd, target)
     (rc, out, err) = module.run_command(cmd)
-    
+
     if rc > 0:
         module.fail_json(cmd=cmd, rc=rc, msg=err)
 
@@ -248,7 +246,7 @@ def target_setmanual(module, target):
 
     cmd = '%s --mode node --targetname %s --op=update --name node.startup --value manual' % (iscsiadm_cmd, target)
     (rc, out, err) = module.run_command(cmd)
-    
+
     if rc > 0:
         module.fail_json(cmd=cmd, rc=rc, msg=err)
 
@@ -259,7 +257,7 @@ def main():
     module = AnsibleModule(
         argument_spec = dict(
 
-            # target 
+            # target
             portal = dict(required=False, aliases=['ip']),
             port = dict(required=False, default=3260),
             target = dict(required=False, aliases=['name', 'targetname']),
@@ -272,14 +270,14 @@ def main():
             auto_node_startup = dict(type='bool', aliases=['automatic']),
             discover = dict(type='bool', default=False),
             show_nodes = dict(type='bool', default=False)
-        ),  
+        ),
 
         required_together=[['discover_user', 'discover_pass'],
                            ['node_user', 'node_pass']],
         supports_check_mode=True
     )
 
-    global iscsiadm_cmd 
+    global iscsiadm_cmd
     iscsiadm_cmd = module.get_bin_path('iscsiadm', required=True)
 
     # parameters
@@ -295,7 +293,7 @@ def main():
 
     cached = iscsi_get_cached_nodes(module, portal)
 
-    # return json dict 
+    # return json dict
     result = {}
     result['changed'] = False
 
@@ -333,17 +331,17 @@ def main():
         result['nodes'] = nodes
 
     if login is not None:
-        loggedon = target_loggedon(module,target)
+        loggedon = target_loggedon(module, target)
         if (login and loggedon) or (not login and not loggedon):
             result['changed'] |= False
             if login:
-                result['devicenodes'] = target_device_node(module,target)
+                result['devicenodes'] = target_device_node(module, target)
         elif not check:
             if login:
                 target_login(module, target)
                 # give udev some time
                 time.sleep(1)
-                result['devicenodes'] = target_device_node(module,target)
+                result['devicenodes'] = target_device_node(module, target)
             else:
                 target_logout(module, target)
             result['changed'] |= True
@@ -371,7 +369,6 @@ def main():
     module.exit_json(**result)
 
 
-
 # import module snippets
 from ansible.module_utils.basic import *