Did anyone successfully set up ECS using distributed Elixir? I am tackling this right now. I am especially interested how to connect the nodes. I was thinking it might make sense to write a custom libcluster strategy that fetches the current ip’s connected to the Application Load Balancer. ECS also…

You have hit on the major points. For the hostname, I can offer a concrete example. In the script that starts my application: # Permit OS variable substitution for starting the VM export REPLACE_OS_VARS=true # Get the EC2 fully-qualified hostname for the node name export PUBLIC_HOSTNAME=`curl -s h…

https://forum.elixirforum.com/t/what-would-you-like-to-see-in-a-book-about-elixir-deployments-on-aws-ecs/

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 }'); \ …

Great! That is in line with what I wanted to do. [image] lukaszsamson: We query Route 53 SRV records to discover other nodes and connect them on internal network (no need to expose EPMD ports). So you don’t need to expose the ports in the VPC if it’s internal communication? (AWS noob I know) …

Btw, now ECS support DNS service discovery out of the box. Introducing Service Discovery for Amazon ECS - AWS Discover more about what's new at AWS with Introducing Service Discovery for Amazon ECS I just used libcluster/lib/strategy/dns_poll.ex at master ·…

Yep that’s exactly what we are using as well now. BTW the erlang communication port can be a single port.

Hey guys, thanks for all the info, it helped me a lot set it up myself. You’re all running one node per instance, with a fixed port mapping from container to host, right? AWS doesn’t allow A records in the service registry unless the networkMode of the container is awsvpc (where each container has…

I use Fargate, so it uses the A record for service discovery.

Our tasks are using awsvpc network mode. It has some limits depending on EC2 instance type Elastic network interfaces - Amazon Elastic Compute Cloud . With Fargate you don’t need to think about this limitation

We use a custom Peerage.Provider implementation like defmodule AwsServiceDiscovery do @behaviour Peerage.Provider @impl true def poll do dns_name = Application.fetch_env!(:peerage, :dns_name) app_name = Application.fetch_env!(:peerage, :app_name) :inet_res.lookup(String.to_charl…

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Distributed Elixir in Amazon ECS

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acrolink July 20, 2024, 10:26am 17

Does the same applies for Elastic Beanstalk with applications deployed using Docker?