Linux随记（十八） - 详解

一、k8s的node节点磁盘 /data已使用率超过 85% , 出现disk pressure ，驱逐pod现象

evicted ， the node had condition:[DiskPressure]

#修改/var/lib/kubelet/config.yaml
]# cat /var/lib/kubelet/config.yaml
apiVersion: kubelet.config.k8s.io/v1beta1
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 0s
enabled: true
x509:
clientCAFile: /etc/kubernetes/pki/ca.crt
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 0s
cacheUnauthorizedTTL: 0s
cgroupDriver: systemd
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
cpuManagerReconcilePeriod: 0s
evictionPressureTransitionPeriod: 0s
fileCheckFrequency: 0s
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 0s
imageMinimumGCAge: 0s
kind: KubeletConfiguration
logging:
flushFrequency: 0
options:
json:
infoBufferSize: "0"
verbosity: 0
memorySwap: {
}
nodeStatusReportFrequency: 0s
nodeStatusUpdateFrequency: 0s
rotateCertificates: true
runtimeRequestTimeout: 0s
shutdownGracePeriod: 0s
shutdownGracePeriodCriticalPods: 0s
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 0s
syncFrequency: 0s
volumeStatsAggPeriod: 0s
#202506 添加：
evictionHard:
imagefs.available: 1%
memory.available: 100Mi
nodefs.available: 1%
nodefs.inodesFree: 1%
#重启该node节点的 kubelet
systemctl restart kubelet
systemctl status kubelet

#参考文章：
https://blog.csdn.net/qq_59634082/article/details/136868417 《k8s资源不足时驱赶pod阈值调整》
https://stackoverflow.com/questions/54155534/kubernetes-eviction-manager-evicting-control-plane-pods-to-reclaim-ephemeral-sto/60068671#60068671 
https://devpress.csdn.net/k8s/62ffc7fac67703293080625f.html 《Kubernetes 驱逐管理器驱逐控制平面 pod 以回收临时存储》

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二、删除ES索引和其数据。

k8s上部署3个ES节点 ， 版本elasticsearch:7.6.0 。 删除索引名称带202407的索引。
kubectl exec -it es-new-0 -n test bash
#查看索引名称
curl -s "http://192.168.1.100:9200/_cat/indices?h=index" | grep -i "202407"
#删除索引 【三个ES节点的IP 都要执行】
curl -X DELETE "http://192.168.1.100:9200/api_xxx_202407*"
curl -X DELETE "http://192.168.1.101:9200/api_xxx_202407*"
curl -X DELETE "http://192.168.1.102:9200/api_xxx_202407*"
###查看占用容量 ， 单位MB
curl "http://192.168.1.100:9200/_cat/allocation?v&bytes=gb"
curl "http://192.168.1.100:9200/_cat/indices/api_xxx_202407*?v&h=index,store.size,pri.store.size,status&bytes=mb&s=store.size:desc"

参考文章：
https://blog.csdn.net/weixin_44711737/article/details/125833601 《ES索引清理脚本-总结》 （清理脚本：ES有密码，索引按（周、日）时间命名的清理脚本）

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