forked from kubesphere/kubesphere
/
quotas.go
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/
quotas.go
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/*
Copyright 2019 The KubeSphere Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package quotas
import (
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/informers"
"k8s.io/klog"
"github.com/hzhhong/kubesphere/pkg/api"
)
const (
podsKey = "count/pods"
daemonsetsKey = "count/daemonsets.apps"
deploymentsKey = "count/deployments.apps"
ingressKey = "count/ingresses.extensions"
servicesKey = "count/services"
statefulsetsKey = "count/statefulsets.apps"
persistentvolumeclaimsKey = "persistentvolumeclaims"
jobsKey = "count/jobs.batch"
cronJobsKey = "count/cronjobs.batch"
s2iBuilders = "count/s2ibuilders.devops.kubesphere.io"
)
var supportedResources = map[string]schema.GroupVersionResource{
deploymentsKey: {Group: "apps", Version: "v1", Resource: "deployments"},
daemonsetsKey: {Group: "apps", Version: "v1", Resource: "daemonsets"},
statefulsetsKey: {Group: "apps", Version: "v1", Resource: "statefulsets"},
podsKey: {Group: "", Version: "v1", Resource: "pods"},
servicesKey: {Group: "", Version: "v1", Resource: "services"},
persistentvolumeclaimsKey: {Group: "", Version: "v1", Resource: "persistentvolumeclaims"},
ingressKey: {Group: "extensions", Version: "v1beta1", Resource: "ingresses"},
jobsKey: {Group: "batch", Version: "v1", Resource: "jobs"},
cronJobsKey: {Group: "batch", Version: "v1beta1", Resource: "cronjobs"},
s2iBuilders: {Group: "devops.kubesphere.io", Version: "v1alpha1", Resource: "s2ibuilders"},
}
type ResourceQuotaGetter interface {
GetClusterQuota() (*api.ResourceQuota, error)
GetNamespaceQuota(namespace string) (*api.NamespacedResourceQuota, error)
}
type resourceQuotaGetter struct {
informers informers.SharedInformerFactory
}
func NewResourceQuotaGetter(informers informers.SharedInformerFactory) ResourceQuotaGetter {
return &resourceQuotaGetter{informers: informers}
}
func (c *resourceQuotaGetter) getUsage(namespace, resource string) (int, error) {
genericInformer, err := c.informers.ForResource(supportedResources[resource])
if err != nil {
// we deliberately ignore error if trying to get non existed resource
return 0, nil
}
result, err := genericInformer.Lister().ByNamespace(namespace).List(labels.Everything())
if err != nil {
return 0, err
}
return len(result), nil
}
// no one use this api anymore, marked as deprecated
func (c *resourceQuotaGetter) GetClusterQuota() (*api.ResourceQuota, error) {
quota := v1.ResourceQuotaStatus{Hard: make(v1.ResourceList), Used: make(v1.ResourceList)}
for r := range supportedResources {
used, err := c.getUsage("", r)
if err != nil {
return nil, err
}
var quantity resource.Quantity
quantity.Set(int64(used))
quota.Used[v1.ResourceName(r)] = quantity
}
return &api.ResourceQuota{Namespace: "\"\"", Data: quota}, nil
}
func (c *resourceQuotaGetter) GetNamespaceQuota(namespace string) (*api.NamespacedResourceQuota, error) {
quota, err := c.getNamespaceResourceQuota(namespace)
if err != nil {
klog.Error(err)
return nil, err
}
if quota == nil {
quota = &v1.ResourceQuotaStatus{Hard: make(v1.ResourceList), Used: make(v1.ResourceList)}
}
var resourceQuotaLeft = v1.ResourceList{}
for key, hardLimit := range quota.Hard {
if used, ok := quota.Used[key]; ok {
left := hardLimit.DeepCopy()
left.Sub(used)
if hardLimit.Cmp(used) < 0 {
left = resource.MustParse("0")
}
resourceQuotaLeft[key] = left
}
}
// add extra quota usage, cause user may not specify them
for key := range supportedResources {
// only add them when they don't exist in quotastatus
if _, ok := quota.Used[v1.ResourceName(key)]; !ok {
used, err := c.getUsage(namespace, key)
if err != nil {
klog.Error(err)
return nil, err
}
quota.Used[v1.ResourceName(key)] = *(resource.NewQuantity(int64(used), resource.DecimalSI))
}
}
var result = api.NamespacedResourceQuota{
Namespace: namespace,
}
result.Data.Hard = quota.Hard
result.Data.Used = quota.Used
result.Data.Left = resourceQuotaLeft
return &result, nil
}
func updateNamespaceQuota(tmpResourceList, resourceList v1.ResourceList) {
if tmpResourceList == nil {
tmpResourceList = resourceList
}
for res, usage := range resourceList {
tmpUsage, exist := tmpResourceList[res]
if !exist {
tmpResourceList[res] = usage
}
if tmpUsage.Cmp(usage) == 1 {
tmpResourceList[res] = usage
}
}
}
func (c *resourceQuotaGetter) getNamespaceResourceQuota(namespace string) (*v1.ResourceQuotaStatus, error) {
resourceQuotaLister := c.informers.Core().V1().ResourceQuotas().Lister()
quotaList, err := resourceQuotaLister.ResourceQuotas(namespace).List(labels.Everything())
if err != nil {
klog.Error(err)
return nil, err
} else if len(quotaList) == 0 {
return nil, nil
}
quotaStatus := v1.ResourceQuotaStatus{Hard: make(v1.ResourceList), Used: make(v1.ResourceList)}
for _, quota := range quotaList {
updateNamespaceQuota(quotaStatus.Hard, quota.Status.Hard)
updateNamespaceQuota(quotaStatus.Used, quota.Status.Used)
}
return "aStatus, nil
}