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Add a "kernel" plugin for /proc/stat statistics

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see #235
This commit is contained in:
Cameron Sparr
2016-03-10 13:40:03 +01:00
parent ecbbb8426f
commit db8c24cc7b
6 changed files with 345 additions and 1 deletions
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164
plugins/inputs/system/kernel_test.go Normal file
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@@ -0,0 +1,164 @@
// +build linux
package system
import (
"io/ioutil"
"os"
"testing"
"github.com/influxdata/telegraf/testutil"
"github.com/stretchr/testify/assert"
)
func TestFullProcFile(t *testing.T) {
tmpfile := makeFakeStatFile([]byte(statFile_Full))
defer os.Remove(tmpfile)
k := Kernel{
statFile: tmpfile,
}
acc := testutil.Accumulator{}
err := k.Gather(&acc)
assert.NoError(t, err)
fields := map[string]interface{}{
"boot_time": int64(1457505775),
"context_switches": int64(2626618),
"disk_pages_in": int64(5741),
"disk_pages_out": int64(1808),
"interrupts": int64(1472736),
"processes_forked": int64(10673),
}
acc.AssertContainsFields(t, "kernel", fields)
}
func TestPartialProcFile(t *testing.T) {
tmpfile := makeFakeStatFile([]byte(statFile_Partial))
defer os.Remove(tmpfile)
k := Kernel{
statFile: tmpfile,
}
acc := testutil.Accumulator{}
err := k.Gather(&acc)
assert.NoError(t, err)
fields := map[string]interface{}{
"boot_time": int64(1457505775),
"context_switches": int64(2626618),
"disk_pages_in": int64(5741),
"disk_pages_out": int64(1808),
"interrupts": int64(1472736),
}
acc.AssertContainsFields(t, "kernel", fields)
}
func TestInvalidProcFile1(t *testing.T) {
tmpfile := makeFakeStatFile([]byte(statFile_Invalid))
defer os.Remove(tmpfile)
k := Kernel{
statFile: tmpfile,
}
acc := testutil.Accumulator{}
err := k.Gather(&acc)
assert.Error(t, err)
}
func TestInvalidProcFile2(t *testing.T) {
tmpfile := makeFakeStatFile([]byte(statFile_Invalid2))
defer os.Remove(tmpfile)
k := Kernel{
statFile: tmpfile,
}
acc := testutil.Accumulator{}
err := k.Gather(&acc)
assert.Error(t, err)
}
func TestNoProcFile(t *testing.T) {
tmpfile := makeFakeStatFile([]byte(statFile_Invalid2))
os.Remove(tmpfile)
k := Kernel{
statFile: tmpfile,
}
acc := testutil.Accumulator{}
err := k.Gather(&acc)
assert.Error(t, err)
assert.Contains(t, err.Error(), "does not exist")
}
const statFile_Full = `cpu 6796 252 5655 10444977 175 0 101 0 0 0
cpu0 6796 252 5655 10444977 175 0 101 0 0 0
intr 1472736 57 10 0 0 0 0 0 0 0 0 0 0 156 0 0 0 0 0 0 111551 42541 12356 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ctxt 2626618
btime 1457505775
processes 10673
procs_running 2
procs_blocked 0
softirq 1031662 0 649485 20946 111071 11620 0 1 0 994 237545
page 5741 1808
swap 1 0
`
const statFile_Partial = `cpu 6796 252 5655 10444977 175 0 101 0 0 0
cpu0 6796 252 5655 10444977 175 0 101 0 0 0
intr 1472736 57 10 0 0 0 0 0 0 0 0 0 0 156 0 0 0 0 0 0 111551 42541 12356 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ctxt 2626618
btime 1457505775
procs_running 2
procs_blocked 0
softirq 1031662 0 649485 20946 111071 11620 0 1 0 994 237545
page 5741 1808
`
// missing btime measurement
const statFile_Invalid = `cpu 6796 252 5655 10444977 175 0 101 0 0 0
cpu0 6796 252 5655 10444977 175 0 101 0 0 0
intr 1472736 57 10 0 0 0 0 0 0 0 0 0 0 156 0 0 0 0 0 0 111551 42541 12356 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ctxt 2626618
btime
processes 10673
procs_running 2
procs_blocked 0
softirq 1031662 0 649485 20946 111071 11620 0 1 0 994 237545
page 5741 1808
swap 1 0
`
// missing second page measurement
const statFile_Invalid2 = `cpu 6796 252 5655 10444977 175 0 101 0 0 0
cpu0 6796 252 5655 10444977 175 0 101 0 0 0
intr 1472736 57 10 0 0 0 0 0 0 0 0 0 0 156 0 0 0 0 0 0 111551 42541 12356 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
ctxt 2626618
processes 10673
procs_running 2
page 5741
procs_blocked 0
softirq 1031662 0 649485 20946 111071 11620 0 1 0 994 237545
`
func makeFakeStatFile(content []byte) string {
tmpfile, err := ioutil.TempFile("", "kerneltest")
if err != nil {
panic(err)
}
if _, err := tmpfile.Write(content); err != nil {
panic(err)
}
if err := tmpfile.Close(); err != nil {
panic(err)
}
return tmpfile.Name()
}