[英]Kubernetes HPA deployment cannot find target resource
我正在尝试部署我自己的 HPA,但没有成功。 虽然在尝试部署 kubernetes 的官方 PHP 时,它按计划工作。 当我尝试使用 HPA 部署我自己的测试部署时,它不起作用。
部署官方 Kubernetes 模板镜像:
$ kubectl run php-apache --image=gcr.io/google_containers/hpa-example --requests=cpu=200m --expose --port=80
service "php-apache" created
deployment "php-apache" created
我自己的测试部署结果
{
"apiVersion": "autoscaling/v1",
"kind": "HorizontalPodAutoscaler",
"metadata": {
"annotations": {
"autoscaling.alpha.kubernetes.io/conditions": "[{\"type\":\"AbleToScale\",\"status\":\"False\",\"lastTransitionTime\":\"2019-12-22T20:39:59Z\",\"reason\":\"FailedGetScale\",\"message\":\"the HPA controller was unable to get the target's current scale: deployments/scale.apps \\\"gw-autoscale-t6\\\" not found\"}]"
},
"creationTimestamp": "2019-12-22T20:39:44Z",
"labels": {
"app": "gw-autoscale-t6"
},
"name": "gw-autoscale-t6",
"namespace": "dev",
"resourceVersion": "17299134",
"selfLink": "/apis/autoscaling/v1/namespaces/dev/horizontalpodautoscalers/gw-autoscale-t6",
"uid": "2f7e014c-24fb-11ea-a4d8-a28620329da6"
},
"spec": {
"maxReplicas": 3,
"minReplicas": 1,
"scaleTargetRef": {
"apiVersion": "apps/v1",
"kind": "Deployment",
"name": "gw-autoscale-t6"
},
"targetCPUUtilizationPercentage": 80
},
"status": {
"currentReplicas": 0,
"desiredReplicas": 0
}
}
我用于上述两个部署(官方部署和我的测试部署)的 HPA 部署 yaml :
apiVersion: autoscaling/v2beta1
kind: HorizontalPodAutoscaler
metadata:
name: {{ .Values.name }}
labels:
app: {{ .Values.name }}
namespace: {{ .Values.namespace }}
spec:
scaleTargetRef:
apiVersion: apps/v1
kind: Deployment
name: {{ .Values.name }}
minReplicas: {{ .Values.spec.replicaCountMin }}
maxReplicas: {{ .Values.spec.replicaCountMax }}
targetCPUUtilizationPercentage: 50
selector:
matchLabels:
app: {{ .Values.name }}
template:
metadata:
labels:
app: {{ .Values.name }}
release: {{ .Release.Name }}
heritage: {{ .Release.Service }}
spec:
containers:
- name: {{ .Chart.Name }}
image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
PHP HPA 正在按计划运行
NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE
php-apache Deployment/php-apache 0%/50% 1 3 1 3d7h
测试部署 HPA 不起作用
NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE
gw-autoscale-t6 Deployment/gw-autoscale-t6 <unknown>/80% 1 3 0 11m
测试部署 HPA 错误
Name: gw-autoscale-t6
Namespace: dev
Labels: app=gw-autoscale-t6
Annotations: <none>
CreationTimestamp: Sun, 22 Dec 2019 22:39:44 +0200
Reference: Deployment/gw-autoscale-t6
Metrics: ( current / target )
resource cpu on pods (as a percentage of request): <unknown> / 80%
Min replicas: 1
Max replicas: 3
Deployment pods: 0 current / 0 desired
Conditions:
Type Status Reason Message
---- ------ ------ -------
AbleToScale False FailedGetScale the HPA controller was unable to get the target's current scale: deployments/scale.apps "gw-autoscale-t6" not found
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedGetScale 27s (x81 over 20m) horizontal-pod-autoscaler deployments/scale.apps "gw-autoscale-t6" not found
我还尝试了很多其他类型的部署文件。
我的 Metrics-Service 已安装。
我正在使用 Helm 安装我的部署。
我能做些什么来解决这个问题?
例如:在按 cpu 使用情况扩展的情况下,按照部署文件中的方式使用它。
resources:
requests:
cpu: {{ .Values.request.cpu }}
limits:
cpu: {{ .Values.limits.cpu }}
我解决它的方法是将 cpu 资源添加到部署的文件中,并只保留必要的 HPA 部署 yaml 字段。
HPA 部署文件
apiVersion: autoscaling/v1
kind: HorizontalPodAutoscaler
metadata:
name: {{ .Values.name }}
labels:
app: {{ .Values.name }}
namespace: {{ .Values.namespace }}
spec:
scaleTargetRef:
apiVersion: apps/v1
kind: Deployment
name: {{ .Values.name }}
minReplicas: {{ .Values.spec.replicaCountMin }}
maxReplicas: {{ .Values.spec.replicaCountMax }}
metrics:
- type: Resource
resource:
name: cpu
target:
type: Utilization
averageUtilization: {{ .Values.spec.cpuUtil }}
部署文件 - 资源添加
apiVersion: apps/v1beta2
kind: Deployment
metadata:
name: {{ .Values.name }}
labels:
app: {{ .Values.name }}
namespace: {{ .Values.namespace }}
spec:
replicas: {{ .Values.replicaCount }}
template:
metadata:
labels:
app: {{ .Values.name }}
release: {{ .Release.Name }}
heritage: {{ .Release.Service }}
spec:
containers:
- name: {{ .Chart.Name }}
image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
resources:
requests:
cpu: {{ .Values.request.cpu }}
limits:
cpu: {{ .Values.limits.cpu }}
您必须添加以下代码:
resources:
requests:
cpu: {{ .Values.request.cpu }}
limits:
cpu: {{ .Values.limits.cpu }}
希望能帮助到你 :)
部署似乎有问题。
我试图重现这种情况,看起来您正在使用kubectl create -f hpa.yaml
从文件创建自动缩放器,该文件查找集群中不存在的Deployment/gw-autoscale-t6
。
这就是您收到以下错误的原因:
HPA 控制器无法获得目标的当前规模:deployments/scale.apps\\“gw-autoscale-t6” not found”
对于我的测试,我创建了一个 hpa.yaml,应用它并寻找情况:
$ date && kubectl get hpa && kubectl get deployments php-apache
Tue 31 Dec 2019 10:59:37 AM CET
NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE
php-apache Deployment/php-apache <unknown>/50% 1 10 0 10m
Error from server (NotFound): deployments.extensions "php-apache" not found
它给了我<unknown>
作为TARGETS
值。 零作为REPLICAS
如您所见,Deployment 本身(我们试图用 hpa.yaml 扩展的那个)还不存在。
创建部署后:
$ kubectl run php-apache --image=gcr.io/google_containers/hpa-example --requests=cpu=200m --expose --port=80
service/php-apache created
deployment.apps/php-apache created
我已经等了一分钟让HPA预热并计算一切:
$ kubectl get hpa -o yaml
apiVersion: v1
items:
- apiVersion: autoscaling/v1
kind: HorizontalPodAutoscaler
metadata:
annotations:
autoscaling.alpha.kubernetes.io/conditions: '[{"type":"AbleToScale","status":"True","lastTransitionTime":"2019-12-31T09:59:47Z","reason":"ScaleDownStabilized","message":"recent
recommendations were higher than current one, applying the highest recent
recommendation"},{"type":"ScalingActive","status":"True","lastTransitionTime":"2019-12-31T10:00:33Z","reason":"ValidMetricFound","message":"the
HPA was able to successfully calculate a replica count from cpu resource utilization
(percentage of request)"},{"type":"ScalingLimited","status":"False","lastTransitionTime":"2019-12-31T10:00:33Z","reason":"DesiredWithinRange","message":"the
desired count is within the acceptable range"}]'
autoscaling.alpha.kubernetes.io/current-metrics: '[{"type":"Resource","resource":{"name":"cpu","currentAverageUtilization":0,"currentAverageValue":"1m"}}]'
creationTimestamp: "2019-12-31T09:49:16Z"
name: php-apache
...
spec:
maxReplicas: 10
minReplicas: 1
scaleTargetRef:
apiVersion: extensions/v1beta1
kind: Deployment
name: php-apache
targetCPUUtilizationPercentage: 50
status:
currentCPUUtilizationPercentage: 0
currentReplicas: 1
desiredReplicas: 1
并再次检查:
$ date && kubectl get hpa && kubectl get deployments php-apache
Tue 31 Dec 2019 11:01:16 AM CET
NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE
php-apache Deployment/php-apache 0%/50% 1 10 1 12m
NAME READY UP-TO-DATE AVAILABLE AGE
php-apache 1/1 1 1 97s
所以现在,我可以看到REPLICA
的非零值和TARGETS
显示正确的值。
希望有帮助:) PS 如果您解决了问题,请告诉我。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.