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70 lines
2.3 KiB
Go
70 lines
2.3 KiB
Go
/*
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Copyright 2016 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"
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)
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var _ MetricsProvider = &metricsStatFS{}
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// metricsStatFS represents a MetricsProvider that calculates the used and available
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// Volume space by stat'ing and gathering filesystem info for the Volume path.
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type metricsStatFS 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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// NewMetricsStatfs creates a new metricsStatFS with the Volume path.
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func NewMetricsStatFS(path string) MetricsProvider {
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return &metricsStatFS{path}
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}
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// See MetricsProvider.GetMetrics
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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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func (md *metricsStatFS) 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.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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// getFsInfo writes metrics.Capacity, metrics.Used and metrics.Available from the filesystem info
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func (md *metricsStatFS) getFsInfo(metrics *Metrics) error {
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available, capacity, usage, inodes, inodesFree, inodesUsed, err := util.FsInfo(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.Used = resource.NewQuantity(usage, 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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metrics.InodesUsed = resource.NewQuantity(inodesUsed, resource.BinarySI)
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return nil
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}
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