AWS - ElastiCache for Memcached - bash query first node - Auto Discovery cluster node

aws-elasticache-bash-auto-discovery-node.sh

#!/bin/bash

# https://docs.aws.amazon.com/AmazonElastiCache/latest/mem-ug/AutoDiscovery.html
#
# ConfigurationEndpoint example: mycluster.fnjyzo.cfg.use1.cache.amazonaws.com
#
# CacheNodes Endpoint 1: mycluster.fnjyzo.cfg.0001.use1.cache.amazonaws.com
# CacheNodes Endpoint 2: mycluster.fnjyzo.cfg.0002.use1.cache.amazonaws.com
# 
# Queries and returns the SORTED FIRST item
# MEMCACHED_HOST=$(get_memcached_node)
# echo $MEMCACHED_HOST
function get_memcached_node()
{
	local cluster_id="<<< YOUR CLUSTER ID >>>"
	local memcached_node
	memcached_node=$(aws elasticache describe-cache-clusters \
		--cache-cluster-id "${cluster_id}" \
		--show-cache-node-info \
		--query 'CacheClusters[*].CacheNodes[*].Endpoint.Address' \
		--output text \
		| sed 's/\t/\n/g' \
		| sort --ignore-case \
		| head --lines=1
	)
	echo "$memcached_node"
}

Great bash memcached tool: membash.sh