s390x specific changes to support storage path and storage pool as disk.

1) As on s390x, default is storage path, but if pool explicitly specified in
template.conf it takes preference. So added code to ensure that
if storage pool explicitly specified in file conf then check for default
storage pool is performed.
2) Code changes in tmpl default creation which ensure that on s390x, default
disk is path but if conf file has explicitly pool specified then defult disk
is the sepecified pool. And also ensures that disk is either pool or path
and not both.
3) Code changes in vmtemplate, to ensure that on s390x either a path disk
or a pool disk can be added to template. And if disk to add does not have
both path and pool then tmpl default storage is used.
4) Added 'path' specific to s390x only as commented in template.conf.

Signed-off-by: Archana Singh <[email protected]>

Author: Archana Singh

model/storagepools.py

@@ -73,7 +73,9 @@ def __init__(self, **kargs):
     def _check_default_pools(self):
         pools = {}
 
-        if is_s390x():
+        # Don't create default pool if it's not
+        # explicitly specified in template.conf
+        if is_s390x() and 'pool' not in tmpl_defaults['disks'][0]:
             return
 
         default_pool = tmpl_defaults['disks'][0]['pool']['name']
@@ -91,7 +93,7 @@ def _check_default_pools(self):
             error_msg = ("Storage pool %s does not exist or is not "
                          "active. Please, check the configuration in "
                          "%s/template.conf to ensure it lists only valid "
-                         "networks." % (pool_name, kimchiPaths.sysconf_dir))
+                         "storage." % (pool_name, kimchiPaths.sysconf_dir))
             try:
                 pool = conn.storagePoolLookupByName(pool_name)
             except libvirt.libvirtError, e:

osinfo.py

@@ -27,9 +27,10 @@
 from distutils.version import LooseVersion
 
 from wok.config import PluginPaths
+from wok.utils import wok_log
+from wok.exception import InvalidParameter
 from wok.plugins.kimchi.config import kimchiPaths
 
-
 SUPPORTED_ARCHS = {'x86': ('i386', 'i686', 'x86_64'),
                    'power': ('ppc', 'ppc64'),
                    'ppc64le': ('ppc64le'),
@@ -176,14 +177,43 @@ def _get_tmpl_defaults():
     default_config = ConfigObj(tmpl_defaults)
 
     # Load template configuration file
-    if is_on_s390x:
-        config_file = os.path.join(
-            kimchiPaths.sysconf_dir,
-            'template_s390x.conf')
-    else:
-        config_file = os.path.join(kimchiPaths.sysconf_dir, 'template.conf')
+    config_file = os.path.join(kimchiPaths.sysconf_dir, 'template.conf')
     config = ConfigObj(config_file)
 
+    # File configuration takes preference.
+    # In s390x, file configuration can have storage pool or path.
+    # Default configuration for s390x is storage path.
+    # In case file conf has storage pool then storage pool takes preference.
+    # When conf file has explicitly storage pool: "defaults" should
+    # have storage pool and default configured path should be removed,
+    # as either storage can be path or pool, cannot be both.
+    # When conf file does not explicity storage pool or have explicitly
+    # storage path: "default" should have storage path only and cannot
+    # have default pool.
+    #
+    # Check file conf has storage configured.
+    if is_on_s390x and config.get('storage').get('disk.0'):
+        # remove storage from default_config as file configuration takes
+        # preference.
+        default_config.pop('storage')
+
+        # Get storage configuration present in conf file
+        config_pool = config.get('storage').get('disk.0').get('pool')
+        config_path = config.get('storage').get('disk.0').get('path')
+
+        # If storage configured in conf file then it should have either
+        # pool or path.
+        if not config_pool and not config_path:
+            raise InvalidParameter('KCHTMPL0040E')
+
+        # On s390x if config file has both path and pool uncommented
+        # then path should take preference.
+        if config_pool and config_path:
+            wok_log.warning("Both default pool and path are specified in" +
+                            " template.conf. Hence default pool is being" +
+                            " ignored and only default path will be used")
+            config.get('storage').get('disk.0').pop('pool')
+
     # Merge default configuration with file configuration
     default_config.merge(config)
 

template.conf

@@ -28,6 +28,11 @@
 # Storage pool used to handle the guest disk
 #pool = default
 
+# Only Applicable for s390x. Storage path used to handle the guest disk.
+# In Each disk, pool and path are mutually exclusive parameters and
+# pool will be ignored in case of both specified.
+#path = /var/lib/libvirt/images
+
 [graphics]
 # Graphics type
 # Valid options: vnc | spice

vmtemplate.py

@@ -106,14 +106,25 @@ def __init__(self, args, scan=False, netboot=False):
 
         for index, disk in enumerate(disks):
             disk_info = dict(default_disk)
-            # on s390x/s390 either pool or path should be present in
-            # default disk.
-            if is_s390x() and 'pool' not in default_disk and \
-               'path' not in default_disk:
-                raise InvalidParameter('KCHTMPL0040E')
 
-            # On s390x/s390 pool is optional attribute for disk.
-            pool = disk.get('pool', default_disk.get('pool'))
+            if is_s390x():
+                # Default disk should have either pool or path.
+                if 'pool' not in default_disk and 'path' not in default_disk:
+                    raise InvalidParameter('KCHTMPL0040E')
+
+                # Each disk should have either pool or path.
+                # if not then use "default_disk" configuration.
+                pool = disk.get('pool')
+                path = disk.get('path')
+                if not path and not pool:
+                    # If default disk is path then set disk with default path
+                    if default_disk.get('path'):
+                        path = default_disk.get('path')
+                    # If default disk is pool then set disk with default pool
+                    elif default_disk.get('pool'):
+                        pool = default_disk.get('pool')
+            else:
+                pool = disk.get('pool', default_disk.get('pool'))
 
             if pool:
                 pool_type = self._get_storage_type(pool['name'])
@@ -148,8 +159,12 @@ def __init__(self, args, scan=False, netboot=False):
                 disk_info['index'] = disk_info.get('index', index)
                 self.info['disks'][index] = disk_info
             elif is_s390x():
-                # For now support 'path' only on s390x
-                path = disk.get('path', default_disk.get('path'))
+                # This check is required where 'path' disk
+                # has to be added and hence default pool
+                # has to be removed during template update.
+                if 'pool' in disk_info:
+                    del disk_info['pool']
+
                 disk_info.update(disk)
                 keys = sorted(disk_info.keys())
                 if ((keys != sorted(basic_path_disk)) and