(1).问题现象 describe不能启动的pod,发现两条关键日志: A.0/1 nodes are available: 1 node(s) had taints that the pod didn't...说明当前所在work-node资源不容许此pod部署,发生了pod驱逐。 B.The node was low on resource: ephemeral-storage....我们使用df -h可以看到/var/lib下有很多容器相关的目录,这些都是ephemeral-storage: ?...,日志等全部打印到了ephemeral-storage。...(4).解决方式 原则:让ephemeral-storage只存储kubernetes体系下的日志,系统盘容量要充足。
目前支持cpu, memory, ephemeral-storage三种资源预留。...是kubelet eviction的阈值设定,allocatable才是真正scheduler调度Pod时的参考值(保证Node上所有Pods的request resource不超过Allocatable...Node Allocatable Resource = Node Capacity - Kube-reserved - system-reserved - eviction-threshold ?...=32Gi, cpu=16, ephemeral-storage=100Gi,我们对kubelet进行如下配置: --enforce-node-allocatable=pods,kube-reserved...Scheduler会确保Node上所有的Pod Resource Request不超过NodeAllocatable。
经验教训,在测试前可用iperf3先测试下node节点之间,pod节点之间的网络状况,方法如下: # 在某台node节点上启动iperf3服务端 $ iperf3 --server # 在另一台node...节点上启动iperf3客户端 $ iperf3 --client ${node_ip} --length 150 --parallel 100 -t 60 # 在kuberntes中部署iperf3...官方提供了办法来设置ephemeral-storage空间的配额,但mysql-operator本身并没有提供参数让用户指定ephemeral-storage空间的配额。...这样当MySQL集群长时间压测后,产生的大量binlog会超额使用ephemeral-storage空间,最终kubernetes为了保证容器平台的稳定,会将该pod杀掉,当3节点MySQL集群中有2个...was low on resource: ephemeral-storage.
是kubelet eviction的阈值设定,allocatable才是真正scheduler调度Pod时的参考值(保证Node上所有Pods的request resource不超过Allocatable...Node Allocatable Resource = Node Capacity - Kube-reserved - system-reserved - eviction-threshold ?...—eviction-hard,用来配置kubelet的hard eviction条件,只支持memory和ephemeral-storage两种不可压缩资源。...system-reserved - eviction-threshold = cpu=14.5,memory=28.5Gi,ephemeral-storage=98Gi Scheduler 会确保 Node...上所有的Pod Resource Request不超过NodeAllocatable。
除了K8s-node-06节点。 保留这个docker节点有很多原因。比如当时没有想好用什么打包镜像。默认让jenkins打包镜像。...首先将k8s-node-06节点设置为可调度使gitlab pod正常运行 [root@k8s-master-01 ~]# kubectl uncordon k8s-node-06 node/k8s-node...pods -n kube-ops [root@k8s-master-01 ~]# kubectl cordon k8s-node-06 node/k8s-node-06 cordoned [root@k8s-master...百度搜索关键词:The node was low on resource: ephemeral-storage。...登陆k8s-node-06节点经过查找文件发现Anchore Enine安装后,扫描后后数据文件太大造成的。就删除了anchore Engine 中的扫描记录文件!
除了K8s-node-06节点。 [image.png]保留这个docker节点有很多原因。比如当时没有想好用什么打包镜像。默认让jenkins打包镜像。...首先将k8s-node-06节点设置为可调度使gitlab pod正常运行 [image.png] [root@k8s-master-01 ~]# kubectl uncordon k8s-node-06...node/k8s-node-06 uncordoned [image.png] 等待gitlab pod running 后 将k8s-node-06节点恢复不可调度 [root@k8s-master...-01 ~]# kubectl get pods -n kube-ops [root@k8s-master-01 ~]# kubectl cordon k8s-node-06 node/k8s-node...百度搜索关键词:The node was low on resource: ephemeral-storage。
和 ephemeral-storage 这几个参数。...目前支持 cpu, memory, ephemeral-storage 三种资源预留。...节点可分配资源的计算方式为: Node Allocatable Resource = Node Capacity - Kube-reserved - system-reserved - eviction-threshold...驱逐操作只支持内存和 ephemeral-storage 两种不可压缩资源。...也是符合可分配资源的计算公式的: Node Allocatable Resource = Node Capacity - Kube-reserved - system-reserved - eviction-threshold
经验教训,在测试前可用iperf3先测试下node节点之间,pod节点之间的网络状况,方法如下: 1234567891011121314 # 在某台node节点上启动iperf3服务端$ iperf3...--server# 在另一台node节点上启动iperf3客户端$ iperf3 --client ${node_ip} --length 150 --parallel 100 -t 60# 在kuberntes...三、超额使用ephemeral-storage空间引起集群故障 ?...空间的配额,但mysql-operator本身并没有提供参数让用户指定ephemeral-storage空间的配额。...was low on resource: ephemeral-storage.
Resource Quotas 使用Resource Quotas可以限制某个命名空间使用的系统资源,使用方法如下: kubectl create namespace quota-object-example...200Gi" # 限制该命名空间经由某个storage class创建的总storage limit requests.ephemeral-storage: "5Gi" # 限制该命名空间使用的总ephemeral-storage...request limits.ephemeral-storage: "50Gi" # 限制该命名空间使用的总ephemeral-storage limit count/services:...PriorityClass values: ["medium"] - apiVersion: v1 kind: ResourceQuota metadata: name: pods-low...scopeSelector: matchExpressions: - operator : In scopeName: PriorityClass values: ["low
查看节点详细信息 查看node节点 [root@k8s-master ~]# kubectl describe node k8s-node-1 Name: k8s-node...-1 Capacity: cpu: 2 ephemeral-storage: 51354116Ki hugepages-2Mi: 0 memory...Resource Requests Limits -------- -------- ------ cpu 100m...Resource Requests Limits -------- -------- ------ cpu 850m...(42%) 100m (5%) memory 190Mi (9%) 390Mi (20%) ephemeral-storage 0 (0%) 0 (0%
Capacity: cpu: 4 ephemeral-storage: 27245572Ki hugepages-1Gi: 0 hugepages...Resource Requests Limits -------- -------- ------ cpu 100m...(2%) 0 (0%) memory 50Mi (0%) 0 (0%) ephemeral-storage 0 (0%) 0 (0%) hugepages...Capacity: cpu: 4 ephemeral-storage: 27245572Ki hugepages-1Gi: 0 hugepages...Resource Requests Limits -------- -------- ------ cpu 100m
和 ephemeral-storage 这几个参数。...我们可以通过 kubectl describe node 命令查看节点可分配资源的数据: ➜ ~ kubectl describe node node2 .........Capacity: cpu: 4 ephemeral-storage: 36678148Ki hugepages-1Gi: 0 hugepages-2Mi...目前支持 cpu, memory, ephemeral-storage 三种资源预留。...节点可分配资源的计算方式为: Node Allocatable Resource = Node Capacity - Kube-reserved - system-reserved - eviction-threshold
Resource Requests Limits -------- -------- ------ cpu...k8s-master node-role.kubernetes.io/master- node/k8s-master untainted 查看节点信息---发现污点已被去掉,可以被调度 [root@k8s-master...Resource Requests Limits -------- -------- ------ cpu...k8s-master node-role.kubernetes.io/master="":NoSchedule node/k8s-master tainted 查看节点信息---发现已经不能被调度了...Resource Requests Limits -------- -------- ------ cpu
Node Allocatable(节点可分配资源): Node Capacity --------------------------- | kube-reserved...Node Allocatable 暴露为 API 中 v1.Node 对象的一部分,也是 CLI 中 kubectl describe node 的一部分。...=1Gi --system-reserved 设置为 cpu=500m,memory=1Gi,ephemeral-storage=1Gi --eviction-hard 设置为 memory.available...例如下面效果: Capacity: cpu: 12 ephemeral-storage: 2683368944Ki hugepages-1Gi: 0 hugepages...参考链接 https://kubernetes.io/zh/docs/tasks/administer-cluster/out-of-resource/# https://kubernetes.io/zh
22 +0000 Fri, 16 Oct 2020 09:38:22 +0000 FlannelIsUp Flannel is running on this node...Addresses: InternalIP: 192.168.1.2 Hostname: k8s-master Capacity: cpu: 4 ephemeral-storage...0 memory: 4045668Ki pods: 110 Allocatable: cpu: 4 ephemeral-storage...Resource Requests Limits -------- -------- ------ cpu 800m...(20%) 100m (2%) memory 50Mi (1%) 50Mi (1%) ephemeral-storage 0 (0%) 0 (0%)
if to be add to clusters install Install components to edge node clear Clear edge node...Addresses: InternalIP: 10.0.2.15 Hostname: nuc-vm-ubuntu Capacity: cpu: 2 ephemeral-storage...memory: 8054976Ki pods: 127 Allocatable: cpu: 1940m ephemeral-storage...Resource Requests Limits -------- -------- ------ cpu...240m (12%) 2500m (128%) memory 1490Mi (19%) 5790Mi (76%) ephemeral-storage 0 (0%
type: InternalIP - address: volcano-control-plane type: Hostname allocatable: cpu: "4" ephemeral-storage...8174332Ki pods: "110" volcano.sh/gpu-memory: "89424" volcano.sh/gpu-number: "8" # GPU resource...capacity: cpu: "4" ephemeral-storage: 123722704Ki hugepages-1Gi: "0" hugepages-2Mi...8174332Ki pods: "110" volcano.sh/gpu-memory: "89424" volcano.sh/gpu-number: "8" # GPU resource...例如:当前集群包含三个节点,其中Node1和Node2每台机器包含2张11178MB显存的GPU卡,Node3不包含GPU卡。
ephemeral-storage是为管理和调度Kubernetes中运行的应用短暂存储。...emptyDir:emptyDir 类型Volume在Pod分配到Node上时被创建,Kubernetes会在Node节点上自动分配一个目录,因此无需指定宿主机Node上对应的目录文件。...ephemeral-storage 便是对系统分区进行管理。 临时存储需要限制吗?...Node节点设置临时存储使用大小 Node节点上的 kubelet 组件启动时,kubelet会统计当前节点默认 /var/lib/kubelet 所在的分区可分配的磁盘资源,或者你可以覆盖节点上kubelet...kubelet 如下配置,限制Node节点上临时存储能使用多大磁盘空间 # Node 资源保留 nodefs.available: 10% # 给 /var/lib/kubelet 所在分区保留 10%
*Resource nonzeroRequest *Resource allocatableResource *Resource GPU 是 ScalarResources, 资源名称叫...glog.Infof("available node [%s] GPU : [%d]", nodeInfo.Node().Name, available) return int(available)..., ok := cachedNodeInfoMap[node.Name] if !...xxx: Capacity: cpu: 72 ephemeral-storage: 222779Mi hugepages-1Gi: 0 hugepages...: 2 # 这里就能看到GPU了 pods: 110 Allocatable: cpu: 72 ephemeral-storage
Pod 驱逐机制 磁盘容量不足触发的驱逐 具体细节参考:/kubernetes-study-note#out-of-resource[1]。...: requests: ephemeral-storage: "2Gi" limits: ephemeral-storage: "4Gi" 对...但是,如果 node 进入了 inode 紧缺的状态,kubelet 会将 node 设置为 under pressure,不再接收新的 Pod 请求。...local-ephemeral-storage[6] https://coolshell.cn/articles/17200.html[7] 脚注 [1]/kubernetes-study-note#out-of-resource...: https://blog.gmem.cc/kubernetes-study-note#out-of-resource [2]/flexvolume-study-note#lvm: https://blog.gmem.cc
领取专属 10元无门槛券
手把手带您无忧上云