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Fix issues from code review, and split common code into filesystem_common.go.

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This commit is contained in:
Martín Ferrari 2015-09-16 16:34:34 +03:00
commit dace6dc48b
3 changed files with 145 additions and 189 deletions
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113
collector/filesystem_linux.go
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@ -4,27 +4,21 @@ package collector
import (
"bufio"
"flag"
"fmt"
"os"
"regexp"
"strings"
"syscall"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/log"
)
const (
procMounts = "/proc/mounts"
subsystem = "filesystem"
defIgnoredMountPoints = "^/(sys|proc|dev)($|/)"
procMounts = "/proc/mounts"
)
var (
ignoredMountPoints = flag.String(
"collector.filesystem.ignored-mount-points",
"^/(sys|proc|dev)($|/)",
"Regexp of mount points to ignore for filesystem collector.")
filesystemLabelNames = []string{"device", "mountpoint", "fstype"}
)
type filesystemDetails struct {
@ -33,61 +27,13 @@ type filesystemDetails struct {
fsType string
}
type filesystemCollector struct {
ignoredMountPointsPattern *regexp.Regexp
}
func init() {
Factories["filesystem"] = NewFilesystemCollector
}
func NewFilesystemCollector() (Collector, error) {
pattern := regexp.MustCompile(*ignoredMountPoints)
return &filesystemCollector{
ignoredMountPointsPattern: pattern,
}, nil
}
var (
filesystemLabelNames = []string{"device", "mountpoint", "fstype"}
sizeDesc = prometheus.NewDesc(
prometheus.BuildFQName(Namespace, subsystem, "size"),
"Filesystem size in bytes.",
filesystemLabelNames, nil,
)
freeDesc = prometheus.NewDesc(
prometheus.BuildFQName(Namespace, subsystem, "free"),
"Filesystem free space in bytes.",
filesystemLabelNames, nil,
)
availDesc = prometheus.NewDesc(
prometheus.BuildFQName(Namespace, subsystem, "avail"),
"Filesystem space available to non-root users in bytes.",
filesystemLabelNames, nil,
)
filesDesc = prometheus.NewDesc(
prometheus.BuildFQName(Namespace, subsystem, "files"),
"Filesystem total file nodes.",
filesystemLabelNames, nil,
)
filesFreeDesc = prometheus.NewDesc(
prometheus.BuildFQName(Namespace, subsystem, "files_free"),
"Filesystem total free file nodes.",
filesystemLabelNames, nil,
)
)
// Expose filesystem fullness.
func (c *filesystemCollector) Update(ch chan<- prometheus.Metric) (err error) {
func (c *filesystemCollector) GetStats() (stats []filesystemStats, err error) {
mpds, err := mountPointDetails()
if err != nil {
return err
return nil, err
}
stats = []filesystemStats{}
for _, mpd := range mpds {
if c.ignoredMountPointsPattern.MatchString(mpd.mountPoint) {
log.Debugf("Ignoring mount point: %s", mpd.mountPoint)
@ -96,46 +42,21 @@ func (c *filesystemCollector) Update(ch chan<- prometheus.Metric) (err error) {
buf := new(syscall.Statfs_t)
err := syscall.Statfs(mpd.mountPoint, buf)
if err != nil {
return fmt.Errorf("Statfs on %s returned %s",
return nil, fmt.Errorf("Statfs on %s returned %s",
mpd.mountPoint, err)
}
ch <- prometheus.MustNewConstMetric(
sizeDesc,
prometheus.GaugeValue,
float64(buf.Blocks) * float64(buf.Bsize),
mpd.device, mpd.mountPoint, mpd.fsType,
)
ch <- prometheus.MustNewConstMetric(
freeDesc,
prometheus.GaugeValue,
float64(buf.Bfree) * float64(buf.Bsize),
mpd.device, mpd.mountPoint, mpd.fsType,
)
ch <- prometheus.MustNewConstMetric(
availDesc,
prometheus.GaugeValue,
float64(buf.Bavail) * float64(buf.Bsize),
mpd.device, mpd.mountPoint, mpd.fsType,
)
ch <- prometheus.MustNewConstMetric(
filesDesc,
prometheus.GaugeValue,
float64(buf.Files),
mpd.device, mpd.mountPoint, mpd.fsType,
)
ch <- prometheus.MustNewConstMetric(
filesFreeDesc,
prometheus.GaugeValue,
float64(buf.Ffree),
mpd.device, mpd.mountPoint, mpd.fsType,
)
labelValues := []string{mpd.device, mpd.mountPoint, mpd.fsType}
stats = append(stats, filesystemStats{
labelValues: labelValues,
size: float64(buf.Blocks) * float64(buf.Bsize),
free: float64(buf.Bfree) * float64(buf.Bsize),
avail: float64(buf.Bavail) * float64(buf.Bsize),
files: float64(buf.Files),
filesFree: float64(buf.Ffree),
})
}
return nil
return stats, nil
}
func mountPointDetails() ([]filesystemDetails, error) {