Report:
i am using a istio-proxy fork where all i did was update the base Envoy from Feb27 -> March 8.
With Pilot 0.6.0 I see a crash in Envoy with the message:
[2018-03-14 04:57:59.104][83][warning][upstream] external/envoy/source/server/lds_subscription.cc:68] lds: fetch failure: gRPC client cluster 'mixer_check_server' is not static
A quick scan of the code in Pilot seems to indicate this is the related code:
https://github.com/istio/istio/blob/5e563993a6fce04a81ac3bb82736fc0731eb88c2/pilot/pkg/proxy/envoy/v1/route.go#L519

The client for mixer seems to require static clusters.