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|
//go:build !windows
// +build !windows
/*
** Zabbix
** Copyright (C) 2001-2022 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
package vfsfs
import (
"bufio"
"io"
"os"
"strings"
"git.zabbix.com/ap/plugin-support/plugin"
"golang.org/x/sys/unix"
)
func (p *Plugin) getFsInfoStats() (data []*FsInfoNew, err error) {
allData, err := p.getFsInfo()
if err != nil {
return nil, err
}
fsmap := make(map[string]*FsInfoNew)
fsStatCaller := p.newFSCaller(getFsStats, len(allData))
fsInodeCaller := p.newFSCaller(getFsInode, len(allData))
for _, info := range allData {
bytes, err := fsStatCaller.run(*info.FsName)
if err != nil {
p.Debugf(`cannot discern stats for the mount %s: %s`, *info.FsName, err.Error())
continue
}
inodes, err := fsInodeCaller.run(*info.FsName)
if err != nil {
p.Debugf(`cannot discern inode for the mount %s: %s`, *info.FsName, err.Error())
continue
}
fsmap[*info.FsName] = &FsInfoNew{info.FsName, info.FsType, nil, nil, bytes, inodes, info.FsOptions}
}
allData, err = p.getFsInfo()
if err != nil {
return nil, err
}
for _, info := range allData {
if fsInfo, ok := fsmap[*info.FsName]; ok {
data = append(data, fsInfo)
}
}
return
}
func (p *Plugin) readMounts(file io.Reader) (data []*FsInfo, err error) {
scanner := bufio.NewScanner(file)
for scanner.Scan() {
line := scanner.Text()
mnt := strings.Split(line, " ")
if len(mnt) < 4 {
p.Debugf(`cannot discern the mount in given line: %s`, line)
continue
}
data = append(data, &FsInfo{FsName: &mnt[1], FsType: &mnt[2], FsOptions: &mnt[3]})
}
if err = scanner.Err(); err != nil {
return nil, err
}
return
}
func (p *Plugin) getFsInfo() (data []*FsInfo, err error) {
file, err := os.Open("/proc/mounts")
if err != nil {
return nil, err
}
defer file.Close()
data, err = p.readMounts(file)
if err != nil {
return nil, err
}
return data, nil
}
func getFsStats(path string) (stats *FsStats, err error) {
var pused float64
fs := unix.Statfs_t{}
err = unix.Statfs(path, &fs)
if err != nil {
return nil, err
}
var available uint64
if fs.Bavail > 0 {
available = fs.Bavail
}
total := fs.Blocks * uint64(fs.Bsize)
free := available * uint64(fs.Bsize)
used := (fs.Blocks - fs.Bfree) * uint64(fs.Bsize)
pfree := float64(fs.Blocks-fs.Bfree+fs.Bavail)
if pfree > 0 {
pfree = 100.00 * float64(available) / pfree
pused = 100 - pfree
} else {
pfree = 0
pused = 0
}
stats = &FsStats{
Total: total,
Free: free,
Used: used,
PFree: pfree,
PUsed: pused,
}
return
}
func getFsInode(path string) (stats *FsStats, err error) {
var pfree, pused float64
fs := unix.Statfs_t{}
err = unix.Statfs(path, &fs)
if err != nil {
return nil, err
}
total := fs.Files
free := fs.Ffree
used := fs.Files - fs.Ffree
if 0 < total {
pfree = 100 * float64(free) / float64(total)
pused = 100 * float64(total-free) / float64(total)
} else {
pfree = 100.0
pused = 0.0
}
stats = &FsStats{
Total: total,
Free: free,
Used: used,
PFree: pfree,
PUsed: pused,
}
return
}
func init() {
plugin.RegisterMetrics(&impl, "VfsFs",
"vfs.fs.discovery", "List of mounted filesystems. Used for low-level discovery.",
"vfs.fs.get", "List of mounted filesystems with statistics.",
"vfs.fs.size", "Disk space in bytes or in percentage from total.",
"vfs.fs.inode", "Disk space in bytes or in percentage from total.",
)
}
|
