2.2. 计算资源配额-Kubernets合辑9-资源约束

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```
apiVersion: v1
kind: ResourceQuota
metadata:
  name: computer-resource
  namespace: apps
spec:
  hard:
    requests.cpu: 1000m
    requests.memory: 2048Mi
    limits.cpu: 6000m
    limits.memory: 8192Mi

```

```
[root@maxiaoke local-k8s-yaml]# kubectl describe ns apps # 因为之前存在的pod-demo导致Used不为空
Name:         apps
Labels:       <none>
Annotations:  Status:  Active

Resource Quotas
 Name:            computer-resource
 Resource         Used   Hard
 --------         ---    ---
 limits.cpu       500m   6
 limits.memory    2Gi    8Gi
 requests.cpu     200m   1
 requests.memory  512Mi  2Gi

Resource Limits
 Type       Resource  Min   Max  Default Request  Default Limit  Max Limit/Request Ratio
 ----       --------  ---   ---  ---------------  -------------  -----------------------
 Container  cpu       50m   1    100m             500m           -
 Container  memory    64Mi  2Gi  128Mi            1Gi            -
 ```
 
```
apiVersion: apps/v1
kind: Deployment
metadata:
  name: slb-deploy
  namespace: apps
spec:
  replicas: 1
  selector:
    matchLabels:
      app: slb
  template:
    metadata:
      labels:
        app: slb
    spec:
      containers:
      - name: slb-demo
        image: linuxmaxiaoke/nginx:v1.0.0
        resources:
          limits:
            memory: 1024Mi
            cpu: 500m

```

```
[root@maxiaoke local-k8s-yaml]# kubectl get deployments.apps -n apps  # 副本数为1时，可以运行
NAME         READY   UP-TO-DATE   AVAILABLE   AGE
slb-deploy   1/1     1            1           6m2s
[root@maxiaoke local-k8s-yaml]# kubectl describe ns apps 
Name:         apps
Labels:       <none>
Annotations:  Status:  Active

Resource Quotas
 Name:            computer-resource
 Resource         Used  Hard
 --------         ---   ---
 limits.cpu       500m  6
 limits.memory    1Gi   8Gi
 requests.cpu     500m  1
 requests.memory  1Gi   2Gi
```

```
[root@maxiaoke local-k8s-yaml]# kubectl get deployments.apps -n apps # 副本数为2时，达到极限了
NAME         READY   UP-TO-DATE   AVAILABLE   AGE
slb-deploy   2/2     2            2           6m51s
[root@maxiaoke local-k8s-yaml]# kubectl describe ns apps 
Name:         apps
Labels:       <none>
Annotations:  Status:  Active

Resource Quotas
 Name:            computer-resource
 Resource         Used  Hard
 --------         ---   ---
 limits.cpu       1     6
 limits.memory    2Gi   8Gi
 requests.cpu     1     1
 requests.memory  2Gi   2Gi
```

```
[root@maxiaoke local-k8s-yaml]# kubectl get deployments.apps -n apps  # 因为第三个副本超了requests配额，无法启动
NAME         READY   UP-TO-DATE   AVAILABLE   AGE
slb-deploy   2/3     2            2           10m
[root@maxiaoke local-k8s-yaml]# kubectl describe ns apps 
Name:         apps
Labels:       <none>
Annotations:  Status:  Active

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