List c-ares tracers in documentation

sheenaqotj · Feb 22, 2019 · 85979e9 · 85979e9
1 parent 8fd43c2
commit 85979e9
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/doc/environment_variables.md b/doc/environment_variables.md
@@ -41,6 +41,9 @@ some configuration as environment variables that can be set.
   - bdp_estimator - traces behavior of bdp estimation logic
   - call_combiner - traces call combiner state
   - call_error - traces the possible errors contributing to final call status
+  - cares_resolver - traces operations of the c-ares based DNS resolver
+  - cares_address_sorting - traces operations of the c-ares based DNS
+    resolver's resolved address sorter
   - channel - traces operations on the C core channel stack
   - client_channel - traces client channel activity, including resolver
     and load balancing policy interaction