第 4 章 Quotas

Procedure

1. Define the quota in a file.

2. Use the file to create the quota and apply it to a project:

   $ oc create -f <file> [-n <project_name>]

   For example:

   $ oc create -f core-object-counts.yaml -n demoproject

Procedure

1. Get the list of quotas defined in the project. For example, for a project called demoproject:

   $ oc get quota -n demoproject

   Example output

   NAME                AGE
   besteffort          11m
   compute-resources   2m
   core-object-counts  29m

2. Describe the quota you are interested in, for example the core-object-counts quota:

   $ oc describe quota core-object-counts -n demoproject

   Example output

   Name:			core-object-counts
   Namespace:		demoproject
   Resource		Used	Hard
   --------		----	----
   configmaps		3	10
   persistentvolumeclaims	0	4
   replicationcontrollers	3	20
   secrets			9	10
   services		2	10

Procedure

1. Add a resource quota definition to a project request template:

   • If a project request template does not exist in a cluster:

     1. Create a bootstrap project template and output it to a file called template.yaml:

        $ oc adm create-bootstrap-project-template -o yaml > template.yaml

     2. Add a resource quota definition to template.yaml. The following example defines a resource quota named 'storage-consumption'. The definition must be added before the parameters: section in the template:

        - apiVersion: v1
          kind: ResourceQuota
          metadata:
            name: storage-consumption
          spec:
            hard:
              persistentvolumeclaims: "10" 1
              requests.storage: "50Gi" 2
              gold.storageclass.storage.k8s.io/requests.storage: "10Gi" 3
              silver.storageclass.storage.k8s.io/requests.storage: "20Gi" 4
              silver.storageclass.storage.k8s.io/persistentvolumeclaims: "5" 5
              bronze.storageclass.storage.k8s.io/requests.storage: "0" 6
              bronze.storageclass.storage.k8s.io/persistentvolumeclaims: "0" 7

        1

        The total number of persistent volume claims in a project.

        2

        Across all persistent volume claims in a project, the sum of storage requested cannot exceed this value.

        3

        Across all persistent volume claims in a project, the sum of storage requested in the gold storage class cannot exceed this value.

        4

        Across all persistent volume claims in a project, the sum of storage requested in the silver storage class cannot exceed this value.

        5

        Across all persistent volume claims in a project, the total number of claims in the silver storage class cannot exceed this value.

        6

        Across all persistent volume claims in a project, the sum of storage requested in the bronze storage class cannot exceed this value. When this value is set to 0, the bronze storage class cannot request storage.

        7

        Across all persistent volume claims in a project, the sum of storage requested in the bronze storage class cannot exceed this value. When this value is set to 0, the bronze storage class cannot create claims.

     3. Create a project request template from the modified template.yaml file in the openshift-config namespace:

        $ oc create -f template.yaml -n openshift-config

        注意

        To include the configuration as a kubectl.kubernetes.io/last-applied-configuration annotation, add the --save-config option to the oc create command.

        By default, the template is called project-request.

   • If a project request template already exists within a cluster:

     注意

     If you declaratively or imperatively manage objects within your cluster by using configuration files, edit the existing project request template through those files instead.

     1. List templates in the openshift-config namespace:

        $ oc get templates -n openshift-config

     2. Edit an existing project request template:

        $ oc edit template <project_request_template> -n openshift-config

     3. Add a resource quota definition, such as the preceding storage-consumption example, into the existing template. The definition must be added before the parameters: section in the template.

2. If you created a project request template, reference it in the cluster’s project configuration resource:

   1. Access the project configuration resource for editing:

      • By using the web console:

        1. Navigate to the Administration Cluster Settings page.
        2. Click Global Configuration to view all configuration resources.
        3. Find the entry for Project and click Edit YAML.

      • By using the CLI:

        1. Edit the project.config.openshift.io/cluster resource:

           $ oc edit project.config.openshift.io/cluster

   2. Update the spec section of the project configuration resource to include the projectRequestTemplate and name parameters. The following example references the default project request template name project-request:

      apiVersion: config.openshift.io/v1
      kind: Project
      metadata:
        ...
      spec:
        projectRequestTemplate:
          name: project-request

3. Verify that the resource quota is applied when projects are created:

   1. Create a project:

      $ oc new-project <project_name>

   2. List the project’s resource quotas:

      $ oc get resourcequotas

   3. Describe the resource quota in detail:

      $ oc describe resourcequotas <resource_quota_name>