dshackle overrides: read chain-level disables from .env (DSHACKLE_<CHAIN>_METHOD_GROUPS_DISABLED) - flows from host_vars env_overrides through the standard envfile pipeline; host-local yaml remains as secondary source

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

apply-dshackle-overrides.py

@@ -65,10 +65,40 @@ def apply(upstream, ov):
     return changed
 
 
+ENVFILE = '/root/rpc/.env'
+
+
+def env_overrides():
+    """Chain-level overrides from .env (rendered from host_vars env_overrides):
+        DSHACKLE_<CHAIN>_METHOD_GROUPS_DISABLED=trace,debug
+        DSHACKLE_<CHAIN>_METHODS_DISABLED=eth_getFilterLogs
+    <CHAIN> = dshackle chain name, upper, '-' -> '_' (e.g. BASE, ETH_BEACON_CHAIN)."""
+    spec = {}
+    if not os.path.exists(ENVFILE):
+        return spec
+    import re as _re
+    for line in open(ENVFILE):
+        m = _re.match(r'DSHACKLE_([A-Z0-9_]+)_(METHOD_GROUPS|METHODS)_DISABLED=(.*)', line.strip())
+        if not m:
+            continue
+        chain = m.group(1).lower().replace('_', '-')
+        key = 'method_groups_disabled' if m.group(2) == 'METHOD_GROUPS' else 'methods_disabled'
+        vals = [v.strip() for v in m.group(3).split(',') if v.strip()]
+        if vals:
+            spec.setdefault(f'chain:{chain}', {}).setdefault(key, []).extend(vals)
+    return spec
+
+
 def main():
-    if not os.path.exists(OVERRIDES):
+    spec = env_overrides()
-        return
+    if os.path.exists(OVERRIDES):
-    spec = (yaml.safe_load(open(OVERRIDES)) or {}).get('upstreams') or {}
+        for k, v in ((yaml.safe_load(open(OVERRIDES)) or {}).get('upstreams') or {}).items():
+            cur = spec.setdefault(k, {})
+            for kk, vv in (v or {}).items():
+                if isinstance(vv, list):
+                    cur[kk] = sorted(set((cur.get(kk) or []) + vv))
+                else:
+                    cur.setdefault(kk, vv)
     if not spec:
         return
     total = 0