Distributed Elixir in Amazon ECS

Questions & Help Questions
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We have a few apps running on Fargate ECS. Basically, we build bare images with only the erlang relase build with distillery inside.
In latest setup we use a simple sh script to get internal ip

export NODE_NAME="$1"; \
  export NODE_IP; \
  NODE_IP=$(/sbin/ip route|awk '/scope/ { print $9 }'); \
  exec /opt/app/$1/bin/$1 foreground

and in vm.args we set

-name ${NODE_NAME}@${NODE_IP}`
-setcookie ${COOKIE}

We query Route 53 SRV records to discover other nodes and connect them on internal network (no need to expose EPMD ports). We use peerage lib with custom strategy for that.