96 lines
3.2 KiB
Go
96 lines
3.2 KiB
Go
// +build linux darwin
|
|
|
|
/*
|
|
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 util
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"os/exec"
|
|
"strings"
|
|
"syscall"
|
|
|
|
"k8s.io/kubernetes/pkg/api/resource"
|
|
)
|
|
|
|
// FSInfo linux returns (available bytes, byte capacity, byte usage, total inodes, inodes free, inode usage, error)
|
|
// for the filesystem that path resides upon.
|
|
func FsInfo(path string) (int64, int64, int64, int64, int64, int64, error) {
|
|
statfs := &syscall.Statfs_t{}
|
|
err := syscall.Statfs(path, statfs)
|
|
if err != nil {
|
|
return 0, 0, 0, 0, 0, 0, err
|
|
}
|
|
|
|
// Available is blocks available * fragment size
|
|
available := int64(statfs.Bavail) * int64(statfs.Bsize)
|
|
|
|
// Capacity is total block count * fragment size
|
|
capacity := int64(statfs.Blocks) * int64(statfs.Bsize)
|
|
|
|
// Usage is block being used * fragment size (aka block size).
|
|
usage := (int64(statfs.Blocks) - int64(statfs.Bfree)) * int64(statfs.Bsize)
|
|
|
|
inodes := int64(statfs.Files)
|
|
inodesFree := int64(statfs.Ffree)
|
|
inodesUsed := inodes - inodesFree
|
|
|
|
return available, capacity, usage, inodes, inodesFree, inodesUsed, nil
|
|
}
|
|
|
|
func Du(path string) (*resource.Quantity, error) {
|
|
// Uses the same niceness level as cadvisor.fs does when running du
|
|
// Uses -B 1 to always scale to a blocksize of 1 byte
|
|
out, err := exec.Command("nice", "-n", "19", "du", "-s", "-B", "1", path).CombinedOutput()
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed command 'du' ($ nice -n 19 du -s -B 1) on path %s with error %v", path, err)
|
|
}
|
|
used, err := resource.ParseQuantity(strings.Fields(string(out))[0])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to parse 'du' output %s due to error %v", out, err)
|
|
}
|
|
used.Format = resource.BinarySI
|
|
return &used, nil
|
|
}
|
|
|
|
// Find uses the equivalent of the command `find <path> -dev -printf '.' | wc -c` to count files and directories.
|
|
// While this is not an exact measure of inodes used, it is a very good approximation.
|
|
func Find(path string) (int64, error) {
|
|
if path == "" {
|
|
return 0, fmt.Errorf("invalid directory")
|
|
}
|
|
var counter byteCounter
|
|
var stderr bytes.Buffer
|
|
findCmd := exec.Command("find", path, "-xdev", "-printf", ".")
|
|
findCmd.Stdout, findCmd.Stderr = &counter, &stderr
|
|
if err := findCmd.Start(); err != nil {
|
|
return 0, fmt.Errorf("failed to exec cmd %v - %v; stderr: %v", findCmd.Args, err, stderr.String())
|
|
}
|
|
if err := findCmd.Wait(); err != nil {
|
|
return 0, fmt.Errorf("cmd %v failed. stderr: %s; err: %v", findCmd.Args, stderr.String(), err)
|
|
}
|
|
return counter.bytesWritten, nil
|
|
}
|
|
|
|
// Simple io.Writer implementation that counts how many bytes were written.
|
|
type byteCounter struct{ bytesWritten int64 }
|
|
|
|
func (b *byteCounter) Write(p []byte) (int, error) {
|
|
b.bytesWritten += int64(len(p))
|
|
return len(p), nil
|
|
}
|