added ServiceCompat plugin for running 1.3 server with 1.2 clients

1 files changed, 32 insertions, 0 deletions

diff --git a/src/lib/Bcfg2/Server/Plugins/ServiceCompat.py b/src/lib/Bcfg2/Server/Plugins/ServiceCompat.py
new file mode 100644
index 000000000..aad92b7c7
--- /dev/null
+++ b/src/lib/Bcfg2/Server/Plugins/ServiceCompat.py
@@ -0,0 +1,32 @@
+import Bcfg2.Server.Plugin
+
+class ServiceCompat(Bcfg2.Server.Plugin.Plugin,
+                    Bcfg2.Server.Plugin.StructureValidator):
+    """ Use old-style service modes for older clients """
+    name = 'ServiceCompat'
+    __author__ = 'bcfg-dev@mcs.anl.gov'
+    mode_map = {('true', 'true'): 'default',
+                ('interactive', 'true'): 'interactive_only',
+                ('false', 'false'): 'manual'}
+
+    def validate_structures(self, metadata, structures):
+        """ Apply defaults """
+        if metadata.version_info and metadata.version_info > (1, 3, 0, '', 0):
+            # do not care about a client that is _any_ 1.3.0 release
+            # (including prereleases and RCs)
+            return
+
+        for struct in structures:
+            for entry in struct.xpath("//BoundService|//Service"):
+                mode_key = (entry.get("restart", "true").lower(),
+                            entry.get("install", "true").lower())
+                try:
+                    mode = self.mode_map[mode_key]
+                except KeyError:
+                    self.logger.info("Could not map restart and install "
+                                     "settings of %s:%s to an old-style "
+                                     "Service mode for %s; using 'manual'" %
+                                     (entry.tag, entry.get("name"),
+                                      metadata.hostname))
+                    mode = "manual"
+                entry.set("mode", mode)