需要在3节点ES群集上执行升级并编写测试脚本，然后再将其放入Playbook。任何人都使用yum update而不是安装（OS AWS RHEL 7.2）更新了ES
这是安装脚本，感谢您的评论：
#Installing from the RPM repository
#Create a file called elasticsearch.repo in the /etc/yum.repos.d/ directory for RedHat based distributions,
#DO UPGRADE
#In the terms of ordering, update first the master nodes, then data nodes, then load-balancing/client nodes.
#Disable Shard reallocation
curl -XPUT localhost:9200/_cluster/settings -d '{ "transient" : { "cluster.routing.allocation.enable" : "none" } }'
#Shutdown the instance:
curl -XPOST 'http://localhost:9200/_cluster/nodes/_local/_shutdown'
sudo systemctl stop elasticsearch
sudo yum update elasticsearch
sudo systemctl start elasticsearch
#Enable shard re-allocation:
curl -XPUT localhost:9200/_cluster/settings -d '{ "transient" : { "cluster.routing.allocation.enable" : "all" } }'
#Watch cluster go from yellow state to green with:
curl -X GET http://localhost:9200/_cat/health?v // monitors the overal cluster state
curl -X GET http://localhost:9200/_cat/nodes?v // verify that the new node joined the cluster
curl -X GET http://localhost:9200/_cat/shards?v // see shards being started, initialized and relocated
#Repeat for the next node.
亲切的问候，
答案 0 :(得分：0)
答案是肯定的。 YUM UPDATE将ES升级为最新版本。
确保您拥有：
1）将/etc/yum.repos.d/elasticsearch.repo更新为最新的6.x版本
2）所有索引的创建版本都高于5.x（如果没有，则必须重新索引）
curl -X GET http://host_ip:9200/index_name/_settings?pretty\&human
亲切的问候，