设置k8s node最大pod数量

大家在k8s实际的使用中或许会碰到这个现象，就是pod到达一定的数量，明明节点内存还有很多但是为什么就是不让新建pod了呢，我来和大家说下

默认情况下k8s 一个node最多起110个pod.

那么如何修改一个node中起的pod数量呢？

在Node上 设置打开文件/var/lib/kubelet/config.yaml

修改参数maxPods为指定的值，这里我们把它修改为230：

clusterDomain: cluster.local

cpuManagerReconcilePeriod: 0s

evictionPressureTransitionPeriod: 0s

fileCheckFrequency: 0s

healthzBindAddress: 127.0.0.1

healthzPort: 10248

httpCheckFrequency: 0s

imageMinimumGCAge: 0s

kind: KubeletConfiguration

logging: {}

nodeStatusReportFrequency: 0s

nodeStatusUpdateFrequency: 0s

resolvConf: /run/systemd/resolve/resolv.conf

rotateCertificates: true

runtimeRequestTimeout: 0s

shutdownGracePeriod: 0s

shutdownGracePeriodCriticalPods: 0s

staticPodPath: /etc/kubernetes/manifests

streamingConnectionIdleTimeout: 0s

syncFrequency: 0s

volumeStatsAggPeriod: 0s

maxPods: 230

修改完之后重启下面的服务

systemctl daemon-reload 

systemctl restart kubelet

查询状态：

$ kubectl describe node host07  |  grep -i “Capacity|Allocatable” -A 6

Capacity:

  cpu:                192

  ephemeral-storage:  9298787068Ki

  hugepages-1Gi:      0

  hugepages-2Mi:      0

  memory:             1056273036Ki

  pods:               230

Allocatable:

  cpu:                192

  ephemeral-storage:  8569762147680

  hugepages-1Gi:      0

  hugepages-2Mi:      0

  memory:             1056170636Ki

  pods:               230

从上面可以清晰的看到pods限制的数量已经被修改为230个了，问题解决