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1.问题描述

k8s集群内部署的es中间件起不来，查看日志发现如下警告，节点发现功能开启，但是目前我是单节点服务，所以尝试编辑sts将节点发现功能去掉或者在部署时将你的sts的yaml文件和chart文件修改重新部署以去掉该功能

{"@timestamp":"2024-11-25T15:25:39.730Z", "log.level": "WARN", "message":"This node is a fully-formed single-node cluster with cluster UUID [CHfiZM08TKimVoEvLnfBbw], 
but it is configured as if to discover other nodes and form a multi-node cluster via the [discovery.seed_hosts=[elasticsearch-headless]] setting. 
Fully-formed clusters do not attempt to discover other nodes, and nodes with different cluster UUIDs cannot belong to the same cluster. 
The cluster UUID persists across restarts and can only be changed by deleting the contents of the node's data path(s). Remove the discovery configuration to suppress this message.", "ecs.version": "1.2.0","service.name":"ES_ECS","event.dataset":"elasticsearch.server","process.thread.name":"elasticsearch[elasticsearch-0][cluster_coordination]
[T#1]","log.logger":"org.elasticsearch.cluster.coordination.Coordinator","elasticsearch.cluster.uuid":"CHfiZM08TKimVoEvLnfBbw","elasticsearch.node.id":"1HTqcojWQxGciuVa71gb-g","elasticsearch.node.name":"elasticsearch-0","elasticsearch.cluster.name":"elasticsearch"}kubectl edit sts elasticsearch
#去掉以下部分
name: discovery.seed_hosts
value: elasticsearch-headless

2.修改后报错服务和集群uuid绑定，无法加入新集群

此时需要清除数据目录让其重新运行

注意：生产环境需慎重

{"@timestamp":"2024-11-26T09:50:06.905Z", "log.level": "WARN", "message":"this node is locked into cluster UUID [xxx] 
but [cluster.initial_master_nodes] is set to [elasticsearch-0]; remove this setting to avoid possible data loss caused by subsequent cluster bootstrap attempts; 
for further information see https://www.elastic.co/guide/en/elasticsearch/reference/8.11/important-settings.html#initial_master_nodes", "ecs.version": 
"1.2.0","service.name":"ES_ECS","event.dataset":"elasticsearch.server","process.thread.name":"main",
"log.logger":"org.elasticsearch.cluster.coordination.ClusterBootstrapService","elasticsearch.node.name":"elasticsearch-0","elasticsearch.cluster.name":"elasticsearch"}

3.若有重要数据需要备份数据目录

#删除前请按需备份数据
kubectl scale --replicas=0 sts elasticsearch
kubectl delete pvc elasticsearch-elasticsearch-0
kubectl scale --replicas=1 sts elasticsearch

4.等待pod重建后已正常