RHCA之路—EX280(7)

1. 题目

Configure quotas and limits for project shrimp so that:
The ResourceQuota resource is named ex280-quota
The amount of memory consumed across all containers may not exceed 1Gi
The total amount of CPU usage consumed across all containers may not exceed 2 Kubernetes compute units.
The maximum number of replication controllers does not exceed 3
The maximum number of pods does not exceed 3
The maximum number of service does not exceed 6
The LimitRange resource is named ex280-limits
The amount of memory consumed by a single pod is between 5Mi and 300Mi
The amount of memory consumed by a single container is between 5Mi amd 300Mi with a default request value of 100Mi.
The amount of cpu consumed by a single pod is between 10m and 500m
The amount of cpu consumed by a single container is between 10m and 500m with a default request value of 100m

2. 解题

2.1 切换项目

[root@master samples]# oc project shrimp
Now using project "shrimp" on server "https://master.lab.example.com".
[root@master samples]# mkdir ~/shrimp
[root@master samples]# cd ~/shrimp
[root@master shrimp]# oc projects
You have access to the following projects and can switch between them with 'oc project <projectname>':

    default
    ditto
    farm
    kube-public
    kube-service-catalog
    kube-system
    logging
    management-infra
    openshift
    openshift-ansible-service-broker
    openshift-infra
    openshift-node
    openshift-template-service-broker
    openshift-web-console
    rome
    samples
  * shrimp

Using project "shrimp" on server "https://master.lab.example.com".

2.2 ResourceQuota

2.2.1 ex280-quota.yaml

apiVersion: v1
kind: ResourceQuota
metadata:
  name: ex280-quota
spec:
  hard:
    replicationcontrollers: 3
    services: 6
    pods: 3
    limits.cpu: 2
    limits.memory: 1Gi

2.2.2 创建quota

[root@master shrimp]# oc create -f ex280-quota.yaml
resourcequota "ex280-quota" created

2.3 LimitRange

2.3.1 ex280-limits.yaml

apiVersion: "v1"
kind: "LimitRange"
metadata:
  name: ex280-limits
spec:
  limits:
    - type: "Pod"
      max:
        cpu: 500m
        memory: 300Mi
      min:
        cpu: 10m
        memory: 5Mi
    - type: "Container"
      max:
        cpu: 500m
        memory: 300Mi
      min:
        cpu: 10m
        memory: 5Mi
      defaultRequest:
        cpu: 100m
        memory: 100Mi

2.3.2 创建

[root@master shrimp]# oc create -f ex280-limits.yaml
limitrange "ex280-limits" created

3. 确认

[root@master shrimp]# oc describe quota ex280-quota
Name:                   ex280-quota
Namespace:              shrimp
Resource                Used  Hard
--------                ----  ----
limits.cpu              0     2
limits.memory           0     1Gi
pods                    0     3
replicationcontrollers  0     3
services                0     6
[root@master shrimp]# oc describe limitrange ex280-limits
Name:       ex280-limits
Namespace:  shrimp
Type        Resource  Min  Max    Default Request  Default Limit  Max Limit/Request Ratio
----        --------  ---  ---    ---------------  -------------  -----------------------
Pod         cpu       10m  500m   -                -              -
Pod         memory    5Mi  300Mi  -                -              -
Container   cpu       10m  500m   100m             500m           -
Container   memory    5Mi  300Mi  100Mi            300Mi          -