k8s部署elasticsearch发生版本冲突报错java.lang.IllegalStateException:

java.lang.IllegalStateException: data path [/usr/share/elasticsearch/data] is not compatible with Elasticsearch v7.17.16, perhaps it has already been upgraded to a later version
Likely root cause: java.lang.IllegalStateException: [/usr/share/elasticsearch/data/nodes] is a file which contains [written by Elasticsearch 8.14.3 to prevent a downgrade to a version prior to v8.0.0 which would result in data loss]
at org.elasticsearch.env.NodeEnvironment.(NodeEnvironment.java:286)
at org.elasticsearch.node.Node.(Node.java:429)
at org.elasticsearch.node.Node.(Node.java:309)
at org.elasticsearch.bootstrap.Bootstrap$5.(Bootstrap.java:234)
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:234)
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:434)
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:169)
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:160)
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:77)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:112)
at org.elasticsearch.cli.Command.main(Command.java:77)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:125)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:80)
For complete error details, refer to the log at /usr/share/elasticsearch/logs/docker-cluster.log
es报错
原因：之前用 Elasticsearch 8.14.3 运行过这个 Pod，数据目录 /oldboyedu/data/elasticsearch 中已经写入了 8.x 版本的数据。现在尝试用 7.17.16 启动时，Elasticsearch 检测到数据目录来自更高版本，拒绝启动以防止数据损坏。
解决方案：
清楚旧数据：

删除旧的数据目录

rm -rf /oldboyedu/data/elasticsearch/*

重新创建并设置权限

mkdir -p /oldboyedu/data/elasticsearch
chown -R 1000:1000 /oldboyedu/data/elasticsearch
重新创建Pod
kubectl delete pod xiuxian-hostpath-es
kubectl apply -f 07-pods-volume-hostPath.yaml

执行成功结果：
root@master231:/opt/pods# curl 10.100.1.23:9200 { "name" : "xiuxian-hostpath-es", "cluster_name" : "docker-cluster", "cluster_uuid" : "zeaKOqCdS8G7MN2tOwhdnQ", "version" : { "number" : "7.17.16", "build_flavor" : "default", "build_type" : "docker", "build_hash" : "2b23fa076334f8d4651aeebe458a955a2ae23218", "build_date" : "2023-12-08T10:06:54.672540567Z", "build_snapshot" : false, "lucene_version" : "8.11.1", "minimum_wire_compatibility_version" : "6.8.0", "minimum_index_compatibility_version" : "6.0.0-beta1" }, "tagline" : "You Know, for Search" }