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Handle Resource Quotas

These Makefiles and templates are a port of the openshift-tools. The purpose is to ensure basic quotas are applied to managed clusters while allowing for exemptions in certain namespaces. These exemptions are specified in values.mk (see Uage section).

Usage

Running make will auto-generate hive SelectorSyncSet manifests into the same directory as the Makefile, these will typically be committed back to git. Various changes can be made in the values.mk file.

Changing values

In values.mk, there are the following user-settable values:

  • PERSISTENT_VOLUME_EXCEPTIONS - Space separated list of which namespaces are exempt from the DEFAULT_PV_QUOTA
  • LOAD_BALANCER_EXCEPTIONS - Space separated list of which namespaces are exempt from the DEFAULT_LB_QUOTA
  • DEFAULT_PV_QUOTA - How much space (in Gi) can be allocated for a persistent volume (PV) (Default is 100 Gi)
  • DEFAULT_LB_QUOTA - How many load balancers (LB) may be allocated? (Default is 2)

There are two additional values which SHOULD NOT be changed without significant thought and planning:

  • PV_EXCLUSION_LABEL_NAME - Name of the label applied to the Namespace to exempt it from PV quotas
  • LB_EXCLUSION_LABEL_NAME - Name of the label applied to the Namespace to exempt it from LB quotas

Changing these two values may not cleanup any old labels that were in place, which may not be desired behaviour.

Output

The Makefile generates two kinds of manifests, 1) default ClusterResourceQuota manifests and 2) Per-Namespace exemptions to those quotas. Only one manifest will be created per Namespace, with the appropriate patch fragment to be applied.