Discovery ec2 for elasticsearch 7.4.2


I'm trying to setup elasticsearch cluster on ECS on AWS. I'm able to start 3 elasticsearch nodes, each on separate host but I'm not able to connect those instances to one cluster. I've checked this tutorial and everything works perfectly but it's for version 5.6.4, when I tried it with 7.4.0 or 7.4.2 it doesn't work. I went through discovery ec2 plugin documentation and I've updated the elasticsearch.yml file but it still does not work.

Here my lastest elasticsearch.yml file: "elasticsearch" ${HOSTNAME} eth0
http.port: 9200
transport.port: 9300
network.publish_host: ec2:privateIp
transport.publish_host: ec2:privateIp
discovery.zen.minimum_master_nodes: 2
discovery.seed_providers: ec2
bootstrap.memory_lock: false
discovery.ec2.tag.ElasticSearch: nonprod
discovery.ec2.availability_zones: eu-west-1a,eu-west-1b,eu-west-1c
cluster.routing.allocation.awareness.attributes: aws_availability_zone
discovery.ec2.host_type: private_ip

With this setup I was able to start 2 docker containers on one host and they connected to one cluster, but the idea is that we want to have elasticsearch node per host.

Any ideas what is wrong?

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