Elasticsearch downgrade to 1.7.x

Older releases: https://www.elastic.co/downloads/past-releases

Here is simple way how to downgrade elasticsearch to older versions:

# yum downgrade https://download.elastic.co/elasticsearch/elasticsearch/elasticsearch-1.7.3.noarch.rpm

Prevent from updates in future:

# echo "exclude=elasticseach*" >> /etc/yum.conf