我收到了正在删除我的 pod 的 NoExecuteTaintManager 事件，但我不知道为什么。节点运行状况良好，Pod 具有适当的容忍度。
这实际上会导致无限扩展，因为我的 Pod 设置为使用 3/4 节点 CPU，并且容忍宽限期 > 0。这会在 Pod 终止时强制一个新节点。Cluster Autoscaler 尝试保持副本数 == 2。
我如何确定具体是哪个污点造成的？那么为什么它认为该节点有这种污点？目前 Pod 恰好在 600 秒时被杀死（我已将其更改tolerationSeconds为node.kubernetes.io/unreachable和node.kubernetes.io/not-ready），但是该节点似乎没有经历这两种情况。
NAME READY STATUS RESTARTS AGE
my-api-67df7bd54c-dthbn 1/1 Running 0 8d
my-api-67df7bd54c-mh564 1/1 Running 0 8d
my-pod-6d7b698b5f-28rgw 1/1 Terminating 0 15m
my-pod-6d7b698b5f-2wmmg 1/1 Terminating 0 13m
my-pod-6d7b698b5f-4lmmg 1/1 Running 0 4m32s
my-pod-6d7b698b5f-7m4gh 1/1 Terminating 0 71m
my-pod-6d7b698b5f-8b47r 1/1 Terminating 0 27m
my-pod-6d7b698b5f-bb58b 1/1 Running 0 2m29s
my-pod-6d7b698b5f-dn26n 1/1 Terminating 0 25m
my-pod-6d7b698b5f-jrnkg 1/1 Terminating 0 38m
my-pod-6d7b698b5f-sswps 1/1 Terminating 0 36m
my-pod-6d7b698b5f-vhqnf 1/1 Terminating 0 59m
my-pod-6d7b698b5f-wkrtg 1/1 Terminating 0 50m
my-pod-6d7b698b5f-z6p2c 1/1 Terminating 0 47m
my-pod-6d7b698b5f-zplp6 1/1 Terminating 0 62m
14:22:43.678937 8 taint_manager.go:102] NoExecuteTaintManager is deleting Pod: my-pod-6d7b698b5f-dn26n
14:22:43.679073 8 event.go:221] Event(v1.ObjectReference{Kind:"Pod", Namespace:"prod", Name:"my-pod-6d7b698b5f-dn26n", UID:"", APIVersion:"", ResourceVersion:"", FieldPath:""}): type: 'Normal' reason: 'TaintManagerEviction' Marking for deletion Pod prod/my-pod-6d7b698b5f-dn26n
# kubectl -n prod get pod my-pod-6d7b698b5f-8b47r -o yaml
apiVersion: v1
kind: Pod
metadata:
annotations:
checksum/config: bcdc41c616f736849a6bef9c726eec9bf704ce7d2c61736005a6fedda0ee14d0
kubernetes.io/psp: eks.privileged
creationTimestamp: "2019-10-25T14:09:17Z"
deletionGracePeriodSeconds: 172800
deletionTimestamp: "2019-10-27T14:20:40Z"
generateName: my-pod-6d7b698b5f-
labels:
app.kubernetes.io/instance: my-pod
app.kubernetes.io/name: my-pod
pod-template-hash: 6d7b698b5f
name: my-pod-6d7b698b5f-8b47r
namespace: prod
ownerReferences:
- apiVersion: apps/v1
blockOwnerDeletion: true
controller: true
kind: ReplicaSet
name: my-pod-6d7b698b5f
uid: c6360643-f6a6-11e9-9459-12ff96456b32
resourceVersion: "2408256"
selfLink: /api/v1/namespaces/prod/pods/my-pod-6d7b698b5f-8b47r
uid: 08197175-f731-11e9-9459-12ff96456b32
spec:
containers:
- args:
- -c
- from time import sleep; sleep(10000)
command:
- python
envFrom:
- secretRef:
name: pix4d
- secretRef:
name: rabbitmq
image: python:3.7-buster
imagePullPolicy: Always
name: my-pod
ports:
- containerPort: 5000
name: http
protocol: TCP
resources:
requests:
cpu: "3"
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /var/run/secrets/kubernetes.io/serviceaccount
name: default-token-gv6q5
readOnly: true
dnsPolicy: ClusterFirst
enableServiceLinks: true
nodeName: ip-10-142-54-235.ec2.internal
nodeSelector:
nodepool: zeroscaling-gpu-accelerated-p2-xlarge
priority: 0
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
serviceAccount: default
serviceAccountName: default
terminationGracePeriodSeconds: 172800
tolerations:
- key: specialized
operator: Exists
- effect: NoExecute
key: node.kubernetes.io/unreachable
operator: Exists
tolerationSeconds: 600
- effect: NoExecute
key: node.kubernetes.io/not-ready
operator: Exists
tolerationSeconds: 600
volumes:
- name: default-token-gv6q5
secret:
defaultMode: 420
secretName: default-token-gv6q5
status:
conditions:
- lastProbeTime: null
lastTransitionTime: "2019-10-25T14:10:40Z"
status: "True"
type: Initialized
- lastProbeTime: null
lastTransitionTime: "2019-10-25T14:11:09Z"
status: "True"
type: Ready
- lastProbeTime: null
lastTransitionTime: "2019-10-25T14:11:09Z"
status: "True"
type: ContainersReady
- lastProbeTime: null
lastTransitionTime: "2019-10-25T14:10:40Z"
status: "True"
type: PodScheduled
containerStatuses:
- containerID: docker://15e2e658c459a91a86573c1096931fa4ac345e06f26652da2a58dc3e3b3d5aa2
image: python:3.7-buster
imageID: docker-pullable://python@sha256:f0db6711abee8d406121c9e057bc0f7605336e8148006164fea2c43809fe7977
lastState: {}
name: my-pod
ready: true
restartCount: 0
state:
running:
startedAt: "2019-10-25T14:11:09Z"
hostIP: 10.142.54.235
phase: Running
podIP: 10.142.63.233
qosClass: Burstable
startTime: "2019-10-25T14:10:40Z"
# kubectl -n prod describe pod my-pod-6d7b698b5f-8b47r
Name: my-pod-6d7b698b5f-8b47r
Namespace: prod
Priority: 0
PriorityClassName: <none>
Node: ip-10-142-54-235.ec2.internal/10.142.54.235
Start Time: Fri, 25 Oct 2019 10:10:40 -0400
Labels: app.kubernetes.io/instance=my-pod
app.kubernetes.io/name=my-pod
pod-template-hash=6d7b698b5f
Annotations: checksum/config: bcdc41c616f736849a6bef9c726eec9bf704ce7d2c61736005a6fedda0ee14d0
kubernetes.io/psp: eks.privileged
Status: Terminating (lasts 47h)
Termination Grace Period: 172800s
IP: 10.142.63.233
Controlled By: ReplicaSet/my-pod-6d7b698b5f
Containers:
my-pod:
Container ID: docker://15e2e658c459a91a86573c1096931fa4ac345e06f26652da2a58dc3e3b3d5aa2
Image: python:3.7-buster
Image ID: docker-pullable://python@sha256:f0db6711abee8d406121c9e057bc0f7605336e8148006164fea2c43809fe7977
Port: 5000/TCP
Host Port: 0/TCP
Command:
python
Args:
-c
from time import sleep; sleep(10000)
State: Running
Started: Fri, 25 Oct 2019 10:11:09 -0400
Ready: True
Restart Count: 0
Requests:
cpu: 3
Environment Variables from:
pix4d Secret Optional: false
rabbitmq Secret Optional: false
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from default-token-gv6q5 (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
default-token-gv6q5:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-gv6q5
Optional: false
QoS Class: Burstable
Node-Selectors: nodepool=zeroscaling-gpu-accelerated-p2-xlarge
Tolerations: node.kubernetes.io/not-ready:NoExecute for 600s
node.kubernetes.io/unreachable:NoExecute for 600s
specialized
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedScheduling 12m (x2 over 12m) default-scheduler 0/13 nodes are available: 1 Insufficient pods, 13 Insufficient cpu, 6 node(s) didn't match node selector.
Normal TriggeredScaleUp 12m cluster-autoscaler pod triggered scale-up: [{prod-worker-gpu-accelerated-p2-xlarge 7->8 (max: 13)}]
Warning FailedScheduling 11m (x5 over 11m) default-scheduler 0/14 nodes are available: 1 Insufficient pods, 1 node(s) had taints that the pod didn't tolerate, 13 Insufficient cpu, 6 node(s) didn't match node selector.
Normal Scheduled 11m default-scheduler Successfully assigned prod/my-pod-6d7b698b5f-8b47r to ip-10-142-54-235.ec2.internal
Normal Pulling 11m kubelet, ip-10-142-54-235.ec2.internal pulling image "python:3.7-buster"
Normal Pulled 10m kubelet, ip-10-142-54-235.ec2.internal Successfully pulled image "python:3.7-buster"
Normal Created 10m kubelet, ip-10-142-54-235.ec2.internal Created container
Normal Started 10m kubelet, ip-10-142-54-235.ec2.internal Started container
# kubectl -n prod describe node ip-10-142-54-235.ec2.internal
Name: ip-10-142-54-235.ec2.internal
Roles: <none>
Labels: beta.kubernetes.io/arch=amd64
beta.kubernetes.io/instance-type=p2.xlarge
beta.kubernetes.io/os=linux
failure-domain.beta.kubernetes.io/region=us-east-1
failure-domain.beta.kubernetes.io/zone=us-east-1b
kubernetes.io/hostname=ip-10-142-54-235.ec2.internal
nodepool=zeroscaling-gpu-accelerated-p2-xlarge
Annotations: node.alpha.kubernetes.io/ttl: 0
volumes.kubernetes.io/controller-managed-attach-detach: true
CreationTimestamp: Fri, 25 Oct 2019 10:10:20 -0400
Taints: specialized=true:NoExecute
Unschedulable: false
Conditions:
Type Status LastHeartbeatTime LastTransitionTime Reason Message
---- ------ ----------------- ------------------ ------ -------
MemoryPressure False Fri, 25 Oct 2019 10:23:11 -0400 Fri, 25 Oct 2019 10:10:19 -0400 KubeletHasSufficientMemory kubelet has sufficient memory available
DiskPressure False Fri, 25 Oct 2019 10:23:11 -0400 Fri, 25 Oct 2019 10:10:19 -0400 KubeletHasNoDiskPressure kubelet has no disk pressure
PIDPressure False Fri, 25 Oct 2019 10:23:11 -0400 Fri, 25 Oct 2019 10:10:19 -0400 KubeletHasSufficientPID kubelet has sufficient PID available
Ready True Fri, 25 Oct 2019 10:23:11 -0400 Fri, 25 Oct 2019 10:10:40 -0400 KubeletReady kubelet is posting ready status
Addresses:
InternalIP: 10.142.54.235
ExternalIP: 3.86.112.24
Hostname: ip-10-142-54-235.ec2.internal
InternalDNS: ip-10-142-54-235.ec2.internal
ExternalDNS: ec2-3-86-112-24.compute-1.amazonaws.com
Capacity:
attachable-volumes-aws-ebs: 39
cpu: 4
ephemeral-storage: 209702892Ki
hugepages-1Gi: 0
hugepages-2Mi: 0
memory: 62872868Ki
pods: 58
Allocatable:
attachable-volumes-aws-ebs: 39
cpu: 4
ephemeral-storage: 200777747706
hugepages-1Gi: 0
hugepages-2Mi: 0
memory: 61209892Ki
pods: 58
System Info:
Machine ID: 0e76fec3e06d41a6bf2c49a18fbe1795
System UUID: EC29973A-D616-F673-6899-A96C97D5AE2D
Boot ID: 4bc510b6-f615-48a7-9e1e-47261ddf26a4
Kernel Version: 4.14.146-119.123.amzn2.x86_64
OS Image: Amazon Linux 2
Operating System: linux
Architecture: amd64
Container Runtime Version: docker://18.6.1
Kubelet Version: v1.13.11-eks-5876d6
Kube-Proxy Version: v1.13.11-eks-5876d6
ProviderID: aws:///us-east-1b/i-0f5b519aa6e38e04a
Non-terminated Pods: (5 in total)
Namespace Name CPU Requests CPU Limits Memory Requests Memory Limits AGE
--------- ---- ------------ ---------- --------------- ------------- ---
amazon-cloudwatch cloudwatch-agent-4d24j 50m (1%) 250m (6%) 50Mi (0%) 250Mi (0%) 12m
amazon-cloudwatch fluentd-cloudwatch-wkslq 50m (1%) 0 (0%) 150Mi (0%) 300Mi (0%) 12m
prod my-pod-6d7b698b5f-8b47r 3 (75%) 0 (0%) 0 (0%) 0 (0%) 14m
kube-system aws-node-6nr6g 10m (0%) 0 (0%) 0 (0%) 0 (0%) 13m
kube-system kube-proxy-wf8k4 100m (2%) 0 (0%) 0 (0%) 0 (0%) 13m
Allocated resources:
(Total limits may be over 100 percent, i.e., overcommitted.)
Resource Requests Limits
-------- -------- ------
cpu 3210m (80%) 250m (6%)
memory 200Mi (0%) 550Mi (0%)
ephemeral-storage 0 (0%) 0 (0%)
attachable-volumes-aws-ebs 0 0
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Starting 13m kubelet, ip-10-142-54-235.ec2.internal Starting kubelet.
Normal NodeHasSufficientMemory 13m (x2 over 13m) kubelet, ip-10-142-54-235.ec2.internal Node ip-10-142-54-235.ec2.internal status is now: NodeHasSufficientMemory
Normal NodeHasNoDiskPressure 13m (x2 over 13m) kubelet, ip-10-142-54-235.ec2.internal Node ip-10-142-54-235.ec2.internal status is now: NodeHasNoDiskPressure
Normal NodeHasSufficientPID 13m (x2 over 13m) kubelet, ip-10-142-54-235.ec2.internal Node ip-10-142-54-235.ec2.internal status is now: NodeHasSufficientPID
Normal NodeAllocatableEnforced 13m kubelet, ip-10-142-54-235.ec2.internal Updated Node Allocatable limit across pods
Normal Starting 12m kube-proxy, ip-10-142-54-235.ec2.internal Starting kube-proxy.
Normal NodeReady 12m kubelet, ip-10-142-54-235.ec2.internal Node ip-10-142-54-235.ec2.internal status is now: NodeReady
# kubectl get node ip-10-142-54-235.ec2.internal -o yaml
apiVersion: v1
kind: Node
metadata:
annotations:
node.alpha.kubernetes.io/ttl: "0"
volumes.kubernetes.io/controller-managed-attach-detach: "true"
creationTimestamp: "2019-10-25T14:10:20Z"
labels:
beta.kubernetes.io/arch: amd64
beta.kubernetes.io/instance-type: p2.xlarge
beta.kubernetes.io/os: linux
failure-domain.beta.kubernetes.io/region: us-east-1
failure-domain.beta.kubernetes.io/zone: us-east-1b
kubernetes.io/hostname: ip-10-142-54-235.ec2.internal
nodepool: zeroscaling-gpu-accelerated-p2-xlarge
name: ip-10-142-54-235.ec2.internal
resourceVersion: "2409195"
selfLink: /api/v1/nodes/ip-10-142-54-235.ec2.internal
uid: 2d934979-f731-11e9-89b8-0234143df588
spec:
providerID: aws:///us-east-1b/i-0f5b519aa6e38e04a
taints:
- effect: NoExecute
key: specialized
value: "true"
status:
addresses:
- address: 10.142.54.235
type: InternalIP
- address: 3.86.112.24
type: ExternalIP
- address: ip-10-142-54-235.ec2.internal
type: Hostname
- address: ip-10-142-54-235.ec2.internal
type: InternalDNS
- address: ec2-3-86-112-24.compute-1.amazonaws.com
type: ExternalDNS
allocatable:
attachable-volumes-aws-ebs: "39"
cpu: "4"
ephemeral-storage: "200777747706"
hugepages-1Gi: "0"
hugepages-2Mi: "0"
memory: 61209892Ki
pods: "58"
capacity:
attachable-volumes-aws-ebs: "39"
cpu: "4"
ephemeral-storage: 209702892Ki
hugepages-1Gi: "0"
hugepages-2Mi: "0"
memory: 62872868Ki
pods: "58"
conditions:
- lastHeartbeatTime: "2019-10-25T14:23:51Z"
lastTransitionTime: "2019-10-25T14:10:19Z"
message: kubelet has sufficient memory available
reason: KubeletHasSufficientMemory
status: "False"
type: MemoryPressure
- lastHeartbeatTime: "2019-10-25T14:23:51Z"
lastTransitionTime: "2019-10-25T14:10:19Z"
message: kubelet has no disk pressure
reason: KubeletHasNoDiskPressure
status: "False"
type: DiskPressure
- lastHeartbeatTime: "2019-10-25T14:23:51Z"
lastTransitionTime: "2019-10-25T14:10:19Z"
message: kubelet has sufficient PID available
reason: KubeletHasSufficientPID
status: "False"
type: PIDPressure
- lastHeartbeatTime: "2019-10-25T14:23:51Z"
lastTransitionTime: "2019-10-25T14:10:40Z"
message: kubelet is posting ready status
reason: KubeletReady
status: "True"
type: Ready
daemonEndpoints:
kubeletEndpoint:
Port: 10250
images:
- names:
- python@sha256:f0db6711abee8d406121c9e057bc0f7605336e8148006164fea2c43809fe7977
- python:3.7-buster
sizeBytes: 917672801
- names:
- 602401143452.dkr.ecr.us-east-1.amazonaws.com/amazon-k8s-cni@sha256:5b7e7435f88a86bbbdb2a5ecd61e893dc14dd13c9511dc8ace362d299259700a
- 602401143452.dkr.ecr.us-east-1.amazonaws.com/amazon-k8s-cni:v1.5.4
sizeBytes: 290739356
- names:
- fluent/fluentd-kubernetes-daemonset@sha256:582770d951f81e0971e852089239ced0186e0bdc3226daf16b99ca4cc22de4f7
- fluent/fluentd-kubernetes-daemonset:v1.3.3-debian-cloudwatch-1.4
sizeBytes: 261867521
- names:
- amazon/cloudwatch-agent@sha256:877106acbc56e747ebe373548c88cd37274f666ca11b5c782211db4c5c7fb64b
- amazon/cloudwatch-agent:latest
sizeBytes: 131360039
- names:
- 602401143452.dkr.ecr.us-east-1.amazonaws.com/eks/kube-proxy@sha256:4767b441ddc424b0ea63c305b79be154f65fb15ebefe8a3b2832ce55aa6de2f0
- 602401143452.dkr.ecr.us-east-1.amazonaws.com/eks/kube-proxy:v1.13.8
sizeBytes: 80183964
- names:
- busybox@sha256:fe301db49df08c384001ed752dff6d52b4305a73a7f608f21528048e8a08b51e
- busybox:latest
sizeBytes: 1219782
- names:
- 602401143452.dkr.ecr.us-east-1.amazonaws.com/eks/pause-amd64@sha256:bea77c323c47f7b573355516acf927691182d1333333d1f41b7544012fab7adf
- 602401143452.dkr.ecr.us-east-1.amazonaws.com/eks/pause-amd64:3.1
sizeBytes: 742472
nodeInfo:
architecture: amd64
bootID: 4bc510b6-f615-48a7-9e1e-47261ddf26a4
containerRuntimeVersion: docker://18.6.1
kernelVersion: 4.14.146-119.123.amzn2.x86_64
kubeProxyVersion: v1.13.11-eks-5876d6
kubeletVersion: v1.13.11-eks-5876d6
machineID: 0e76fec3e06d41a6bf2c49a18fbe1795
operatingSystem: linux
osImage: Amazon Linux 2
systemUUID: EC29973A-D616-F673-6899-A96C97D5AE2D
小智 1
不幸的是，我对您的问题没有确切的答案，但我可能有一些解决方法。
我认为我对 Amazon EKS 集群版本 1.13.11 也遇到了同样的问题 - 我的 pod 正在触发节点扩展，pod 已调度，工作了 300 秒，然后被驱逐：
74m Normal TaintManagerEviction pod/master-3bb760a7-b782-4138-b09f-0ca385db9ad7-workspace Marking for deletion Pod project-beta/master-3bb760a7-b782-4138-b09f-0ca385db9ad7-workspace
有趣的是，如果同一个 Pod 被安排在现有节点而不是刚刚创建的节点上，则它能够毫无问题地运行。
根据我的调查，这个特定的 Kubernetes 版本确实存在一些问题。也许是 TaintBasedEvictions 功能的一些边缘情况（我认为它在 Kubernetes 1.13 版本中默认启用）。
为了“修复”这个问题，我将集群版本更新到 1.14。此后，神秘的 pod 驱逐就不再发生了。
因此，如果您可以的话，我建议您将集群更新到 1.14 版本（与 cluster-autoscaler 一起）。
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