HPA表示ComputeMetricsReplicas失败

Question

我部署了一个应用程序，并将其作为负载均衡器服务公开。我在部署的yaml中添加了resource字段，以请求100米的cpu。定义了HPA，以在CPU超过50%时扩展应用程序。应用程序无法自动缩放，cpu利用率始终显示为未知。kubectl describe hpa给出以下结果：

Name:                                                  storyexporter-hpa
Namespace:                                             default
Labels:                                                <none>
Annotations:                                           kubectl.kubernetes.io/last-applied-configuration:
{"apiVersion":"autoscaling/v2beta1","kind":"HorizontalPodAutoscaler","metadata":{"annotations":{},"name":"storyexporter-hpa","namespace":"...
CreationTimestamp:                                     Sat, 24 Oct 2020 18:23:46 +0530
Reference:                                             Deployment/storyexporter-deployment
Metrics:                                               ( current / target )
resource cpu on pods  (as a percentage of request):  <unknown> / 50%
Min replicas:                                          1
Max replicas:                                          3
Deployment pods:                                       1 current / 0 desired
Conditions:
Type           Status  Reason                   Message
----           ------  ------                   -------
AbleToScale    True    SucceededGetScale        the HPA controller was able to get the target's current scale
ScalingActive  False   FailedGetResourceMetric  the HPA was unable to compute the replica count: missing request for cpu
Events:
Type     Reason                        Age                 From                       Message
----     ------                        ----                ----                       -------
Warning  FailedGetResourceMetric       11s (x7 over 103s)  horizontal-pod-autoscaler  missing request for cpu
Warning  FailedComputeMetricsReplicas  11s (x7 over 103s)  horizontal-pod-autoscaler  invalid metrics (1 invalid out of 1), first error is: failed to get cpu utilization: missing request for cpu

Kuectl top node命令有效。我部署了一个演示wordpress应用程序，并为其附加了HPA，它显示了CPU利用率，而不是未知。

附上我的部署和HPA的yaml。

apiVersion: v1
kind: Service
metadata:
name: storyexporter
labels:
app: storyexporter
spec:
ports:
- port: 8080
selector:
app: storyexporter
type: LoadBalancer
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: storyexporter-deployment
spec:
selector:
matchLabels:
app: storyexporter
replicas: 1
template:
metadata:
labels:
app: storyexporter
spec:
containers:
- name: storyexporter
image: <ImagePath>
env:
- name: STORYEXPORTER_MONGO_HOST
value: storyexporter-mongodb
- name: STORYEXPORTER_MONGO_USERNAME
value: admin
- name: STORYEXPORTER_MONGO_PASSWORD
valueFrom:
secretKeyRef:
name: mongodb-password
key: password
- name: STORYEXPORTER_RABBIT_HOST
value: storyexporter-rabbitmq
- name: STORYEXPORTER_RABBIT_USERNAME
value: guest
- name: STORYEXPORTER_RABBIT_PASSWORD
valueFrom:
secretKeyRef:
name: rabbitmq-password
key: password
- name: EXPIRED_RESOURCES_TTL
value: '3600000'
- name: CHROMIUM_TIMEOUT_IN_SECONDS
value: '900'
- name: CHROMIUM_WINDOW_SIZE
value: '1920,1020'
- name: AVG_MB_PER_STORY
value: '1000'
- name: CHROMIUM_ATTEMPTS_BEFORE_FAIL
value: '0'
- name: JAVA_OPTS
value: ''
- name: SKIP_EQS_ROUTING
value: 'false'
- name: CHROMIUM_POOL_SIZE
value: '4'
- name: DEV
value: 'true'
- name: LOCAL
value: 'true'
ports:
- containerPort: 8080
resources:
requests:
cpu: "100m"
limits:
cpu: "200m"
imagePullPolicy: Always
imagePullSecrets:
- name: regcred

HPA YAML

apiVersion: autoscaling/v2beta1
kind: HorizontalPodAutoscaler
metadata:
name: storyexporter-hpa
namespace: default
spec:
scaleTargetRef:                            
apiVersion: apps/v1
kind: Deployment
name: storyexporter-deployment
minReplicas: 1
maxReplicas: 3
metrics:
- type: Resource
resource:
name: cpu
targetAverageUtilization: 50

Answer 1

如果使用基于多容器的Pod，则必须为所有容器设置资源(即CPU和内存的请求和限制(。

+  resources:
+    requests:
+      cpu: 100m
+      memory: "256Mi"
+    limits:
+      cpu: 200m
+      memory: "512Mi"