Merge !1653: manager: delayed policy-loader exit

NEWS

@@ -1,3 +1,12 @@
+Knot Resolver 6.0.11 (2025-0m-dd)
+=================================
+
+Bugfixes
+--------
+- manager: avoid an uncommon startup race in policy-loader (!1653)
+  [WARN] exited: policy-loader (exit status 0; not expected)
+
+
 Knot Resolver 6.0.10 (2025-01-20)
 =================================
 

daemon/lua/kres-gen-33.lua

@@ -11,6 +11,8 @@ struct timeval {
 	__suseconds_t tv_usec;
 };
 
+unsigned sleep(unsigned seconds);
+
 typedef struct knot_dump_style knot_dump_style_t;
 extern const knot_dump_style_t KR_DUMP_STYLE_DEFAULT;
 struct kr_cdb_api {};

daemon/lua/kres-gen.sh

@@ -62,6 +62,10 @@ struct timeval {
 	__suseconds_t tv_usec;
 };
 "
+# We use this in policy-loader
+printf "
+unsigned sleep(unsigned seconds);
+"
 
 ## Various types (mainly), from libknot and libkres
 

python/knot_resolver/datamodel/templates/policy-config.lua.j2

@@ -40,7 +40,13 @@ cache.open({{ cfg.cache.size_max.bytes() }}, 'lmdb://{{ cfg.cache.storage }}')
 {% set disable_defer = true %}
 {% include "defer.lua.j2" %}
 
-
 {% endif %}
 
+-- This sleep() is necessary because of the possible
+-- termination of the policy-loader before it is
+-- added into starting_processes in sd_notify.py.
+-- If this happens, the READY notification will end with an error.
+C.sleep(1)
+
+-- exit policy-loader properly
 quit()