created a gen3 command to create a new elasticsearch cluster based on…

… the existing cluster.

gen3/bin/create-es7-cluster.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+
+source "${GEN3_HOME}/gen3/lib/utils.sh"
+gen3_load "gen3/gen3setup"
+
+# Save the new and old cluster names to vars
+environment=`gen3 api environment`
+existing_cluster_name="$environment-gen3-metadata"
+new_cluster_name="$environment-gen3-metadata-2"
+
+# Gather existing cluster information
+cluster_info=$(aws es describe-elasticsearch-domain --domain-name "$existing_cluster_name")
+
+# Extract relevant information from the existing cluster
+instance_type=`echo "$cluster_info" | jq -r '.DomainStatus.ElasticsearchClusterConfig.InstanceType'`
+instance_count=`echo "$cluster_info" | jq -r '.DomainStatus.ElasticsearchClusterConfig.InstanceCount'`
+volume_type=`echo "$cluster_info" | jq -r '.DomainStatus.EBSOptions.VolumeType'`
+volume_size=`echo "$cluster_info" | jq -r '.DomainStatus.EBSOptions.VolumeSize'`
+vpc_name=`echo "$cluster_info" | jq -r '.DomainStatus.VPCOptions.VPCId'`
+subnet_ids=`echo "$cluster_info" | jq -r '.DomainStatus.VPCOptions.SubnetIds[]'`
+security_groups=`echo "$cluster_info" | jq -r '.DomainStatus.VPCOptions.SecurityGroupIds[]'`
+access_policies=`echo "$cluster_info" | jq -r '.DomainStatus.AccessPolicies'`
+kms_key_id=`echo "$cluster_info" | jq -r '.DomainStatus.EncryptionAtRestOptions.KmsKeyId'`
+
+# Create the new Elasticsearch cluster
+aws es create-elasticsearch-domain \
+  --domain-name "$new_cluster_name" \
+  --elasticsearch-version "7.10" \
+  --elasticsearch-cluster-config \
+    "InstanceType=$instance_type,InstanceCount=$instance_count" \
+  --ebs-options \
+    "EBSEnabled=true,VolumeType=$volume_type,VolumeSize=$volume_size" \
+  --vpc-options "SubnetIds=${subnet_ids[*]},SecurityGroupIds=${security_groups[*]}" \
+  --access-policies "$access_policies" \
+  --encryption-at-rest-options "Enabled=true,KmsKeyId=$kms_key_id"\
+  > /dev/null 2>&1
+
+# Wait for the new cluster to be available
+sleep_duration=30
+max_retries=10
+retry_count=0
+
+while [ $retry_count -lt $max_retries ]; do
+  cluster_status=$(aws es describe-elasticsearch-domain --domain-name "$new_cluster_name" | jq -r '.DomainStatus.Processing')
+  if [ "$cluster_status" != "true" ]; then
+    echo "New cluster is available."
+    break
+  fi
+  sleep $sleep_duration
+  ((retry_count++))
+done
+
+if [ $retry_count -eq $max_retries ]; then
+  echo "New cluster creation may still be in progress. Please check the AWS Management Console for the status."
+fi