d45ba645a8
Fix inode usage calculation to use filepath.Walk instead of executing an
external find. Also calculate the disk usage while at it so we also get
rid of the external dependency of `nice` and `du`. (#95172)
This is similar to what cadvisor does since commit
046818d64c
This solves three problems:
- Counts number of inodes correct when there are hardlinks (#96114)
- Makes kubelet work without GNU findutils (#95186)
- Makes kubelet work without GNU coreutils (#95172)
86 lines
2.5 KiB
Go
86 lines
2.5 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package volume
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import (
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/kubernetes/pkg/volume/util/fs"
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)
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var _ MetricsProvider = &metricsDu{}
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// metricsDu represents a MetricsProvider that calculates the used and
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// available Volume space by calling fs.DiskUsage() and gathering
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// filesystem info for the Volume path.
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type metricsDu struct {
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// the directory path the volume is mounted to.
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path string
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}
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// NewMetricsDu creates a new metricsDu with the Volume path.
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func NewMetricsDu(path string) MetricsProvider {
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return &metricsDu{path}
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}
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// GetMetrics calculates the volume usage and device free space by executing "du"
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// and gathering filesystem info for the Volume path.
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// See MetricsProvider.GetMetrics
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func (md *metricsDu) GetMetrics() (*Metrics, error) {
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metrics := &Metrics{Time: metav1.Now()}
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if md.path == "" {
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return metrics, NewNoPathDefinedError()
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}
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err := md.getDiskUsage(metrics)
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if err != nil {
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return metrics, err
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}
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err = md.getFsInfo(metrics)
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if err != nil {
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return metrics, err
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}
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return metrics, nil
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}
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// getDiskUsage writes metrics.Used and metric.InodesUsed from fs.DiskUsage
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func (md *metricsDu) getDiskUsage(metrics *Metrics) error {
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usage, err := fs.DiskUsage(md.path)
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if err != nil {
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return err
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}
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metrics.Used = resource.NewQuantity(usage.Bytes, resource.BinarySI)
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metrics.InodesUsed = resource.NewQuantity(usage.Inodes, resource.BinarySI)
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return nil
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}
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// getFsInfo writes metrics.Capacity and metrics.Available from the filesystem
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// info
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func (md *metricsDu) getFsInfo(metrics *Metrics) error {
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available, capacity, _, inodes, inodesFree, _, err := fs.Info(md.path)
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if err != nil {
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return NewFsInfoFailedError(err)
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}
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metrics.Available = resource.NewQuantity(available, resource.BinarySI)
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metrics.Capacity = resource.NewQuantity(capacity, resource.BinarySI)
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metrics.Inodes = resource.NewQuantity(inodes, resource.BinarySI)
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metrics.InodesFree = resource.NewQuantity(inodesFree, resource.BinarySI)
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return nil
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}
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