faq: panic threshold (#464)

Signed-off-by: Matt Klein <mklein@lyft.com>
7 years ago · f74df757b7
parent 05c063ec46
commit f74df757b7
2 changed files with 7 additions and 0 deletions
--- a/docs/root/faq/lb_panic_threshold.rst
+++ b/docs/root/faq/lb_panic_threshold.rst
@ -0,0 +1,6 @@
+I setup health checking. When I fail some hosts, Envoy starts routing to all of them again. Why?
+================================================================================================
+
+This feature is known as the load balancer :ref:`panic threshold
+<arch_overview_load_balancing_panic_threshold>`. It is used to prevent cascading failure when
+upstream hosts start failing health checks in large numbers.
--- a/docs/root/faq/overview.rst
+++ b/docs/root/faq/overview.rst
@ -11,3 +11,4 @@ FAQ
  sni
  zone_aware_routing
  zipkin_tracing
+  lb_panic_threshold