Consul client agent intermittently becomes unreachable and exit eventually due to flaky network connections.

[sumitsarkar]

The consul client agent becomes unreachable and exits if the network connections are flaky in cloud environments. There are some issues in Consul which are related to this. #3411, [#1007] (hashicorp/consul#1007) are somewhat related. #916 is one which has the largest discussion related to this.

A restart of the consul client agent fixes this in most of the documented cases. A possible fix for instances without enhanced networking mode is to have a cron job that periodically checks if consul agent is alive and restarts the task if not.