148422597X Kubernetes Management Design Patterns [Vohra 2017-01-29] {E559F6BB}

Chapter 12 ■ Using Resource Quotas
The hard limit on the number of ConfigMaps is 5. Create another file, named mysql.config, and set its
content to mysql. Create, or try to create, the sixth ConfigMap:
./kubectl create configmap mysql-config6 --from-file=/mysql/env/mysql.config
An error message indicates that the number of ConfigMaps is being exceeded, as shown in Figure 12-20.
Figure 12-20. Error message indicates that the object-quotas quota is exceeded for ConfigMaps
Defining Best-Effort Scope Quotas
The BestEffort scope quota is used only for tracking pods. And if excess resources are available, pods in
excess of the hard limit could be scheduled, although the pods (exceeding the hard limit) would be the
first to be terminated if resources are required for another object. To demonstrate, create a ResourceQuota
definition file best-effort-quotas.yaml. Set the hard limit on the number of pods to 5. Set scopes to
BestEffort.
apiVersion: v1
kind: ResourceQuota
metadata:
name: best-effort-quotas
spec:
hard:
pods: "5"
scopes:
-
BestEffort
294