mgr/cephadm: make UpgradeState from_json a bit safer

This way, for downgrades to whatever versions
this lands in onward, having added new parameters to
UpgradeState shouldn't break anything. Can't do much
about downgrades to older versions from this one
but this should help in the future.

Signed-off-by: Adam King <adking@redhat.com>

diff --git a/src/pybind/mgr/cephadm/upgrade.py b/src/pybind/mgr/cephadm/upgrade.py
index c4e4f74b278d3ac366d3dcca0cd435a58aa67323..b3c9d3d1541000466aec35bba3f52aae44b23f29 100644 (file)
--- a/src/pybind/mgr/cephadm/upgrade.py
+++ b/src/pybind/mgr/cephadm/upgrade.py
@@ -87,8 +87,9 @@ class UpgradeState:
 
     @classmethod
     def from_json(cls, data: dict) -> Optional['UpgradeState']:
+        valid_params = UpgradeState.__init__.__code__.co_varnames
         if data:
-            c = {k: v for k, v in data.items()}
+            c = {k: v for k, v in data.items() if k in valid_params}
             if 'repo_digest' in c:
                 c['target_digests'] = [c.pop('repo_digest')]
             return cls(**c)