mirror of https://github.com/k3s-io/k3s
100 lines
2.8 KiB
Go
100 lines
2.8 KiB
Go
|
/*
|
||
|
Copyright 2014 The Kubernetes 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 volume
|
||
|
|
||
|
import (
|
||
|
"k8s.io/apimachinery/pkg/api/resource"
|
||
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
||
|
"k8s.io/kubernetes/pkg/volume/util/fs"
|
||
|
)
|
||
|
|
||
|
var _ MetricsProvider = &metricsDu{}
|
||
|
|
||
|
// metricsDu represents a MetricsProvider that calculates the used and
|
||
|
// available Volume space by calling fs.DiskUsage() and gathering
|
||
|
// filesystem info for the Volume path.
|
||
|
type metricsDu struct {
|
||
|
// the directory path the volume is mounted to.
|
||
|
path string
|
||
|
}
|
||
|
|
||
|
// NewMetricsDu creates a new metricsDu with the Volume path.
|
||
|
func NewMetricsDu(path string) MetricsProvider {
|
||
|
return &metricsDu{path}
|
||
|
}
|
||
|
|
||
|
// GetMetrics calculates the volume usage and device free space by executing "du"
|
||
|
// and gathering filesystem info for the Volume path.
|
||
|
// See MetricsProvider.GetMetrics
|
||
|
func (md *metricsDu) GetMetrics() (*Metrics, error) {
|
||
|
metrics := &Metrics{Time: metav1.Now()}
|
||
|
if md.path == "" {
|
||
|
return metrics, NewNoPathDefinedError()
|
||
|
}
|
||
|
|
||
|
err := md.runDiskUsage(metrics)
|
||
|
if err != nil {
|
||
|
return metrics, err
|
||
|
}
|
||
|
|
||
|
err = md.runFind(metrics)
|
||
|
if err != nil {
|
||
|
return metrics, err
|
||
|
}
|
||
|
|
||
|
err = md.getFsInfo(metrics)
|
||
|
if err != nil {
|
||
|
return metrics, err
|
||
|
}
|
||
|
|
||
|
return metrics, nil
|
||
|
}
|
||
|
|
||
|
// runDiskUsage gets disk usage of md.path and writes the results to metrics.Used
|
||
|
func (md *metricsDu) runDiskUsage(metrics *Metrics) error {
|
||
|
used, err := fs.DiskUsage(md.path)
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
metrics.Used = used
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// runFind executes the "find" command and writes the results to metrics.InodesUsed
|
||
|
func (md *metricsDu) runFind(metrics *Metrics) error {
|
||
|
inodesUsed, err := fs.Find(md.path)
|
||
|
if err != nil {
|
||
|
return err
|
||
|
}
|
||
|
metrics.InodesUsed = resource.NewQuantity(inodesUsed, resource.BinarySI)
|
||
|
return nil
|
||
|
}
|
||
|
|
||
|
// getFsInfo writes metrics.Capacity and metrics.Available from the filesystem
|
||
|
// info
|
||
|
func (md *metricsDu) getFsInfo(metrics *Metrics) error {
|
||
|
available, capacity, _, inodes, inodesFree, _, err := fs.FsInfo(md.path)
|
||
|
if err != nil {
|
||
|
return NewFsInfoFailedError(err)
|
||
|
}
|
||
|
metrics.Available = resource.NewQuantity(available, resource.BinarySI)
|
||
|
metrics.Capacity = resource.NewQuantity(capacity, resource.BinarySI)
|
||
|
metrics.Inodes = resource.NewQuantity(inodes, resource.BinarySI)
|
||
|
metrics.InodesFree = resource.NewQuantity(inodesFree, resource.BinarySI)
|
||
|
return nil
|
||
|
}
|