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Make collector testable and add native test

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This commit is contained in:
Johannes 'fish' Ziemke 2014-02-18 13:17:40 +01:00
parent 3ac5222f8b
commit 3a4aa70afb
9 changed files with 280 additions and 21 deletions
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2
collector/collector.go
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@ -12,7 +12,7 @@ type Collector interface {
// Get new metrics and expose them via prometheus registry. // Get new metrics and expose them via prometheus registry.
Update() (n int, err error) Update() (n int, err error)
// Returns the name of the collector // Returns the name of the collector.
Name() string Name() string
} }

38
collector/fixtures/diskstats Normal file
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@ -0,0 +1,38 @@
1 0 ram0 0 0 0 0 0 0 0 0 0 0 0
1 1 ram1 0 0 0 0 0 0 0 0 0 0 0
1 2 ram2 0 0 0 0 0 0 0 0 0 0 0
1 3 ram3 0 0 0 0 0 0 0 0 0 0 0
1 4 ram4 0 0 0 0 0 0 0 0 0 0 0
1 5 ram5 0 0 0 0 0 0 0 0 0 0 0
1 6 ram6 0 0 0 0 0 0 0 0 0 0 0
1 7 ram7 0 0 0 0 0 0 0 0 0 0 0
1 8 ram8 0 0 0 0 0 0 0 0 0 0 0
1 9 ram9 0 0 0 0 0 0 0 0 0 0 0
1 10 ram10 0 0 0 0 0 0 0 0 0 0 0
1 11 ram11 0 0 0 0 0 0 0 0 0 0 0
1 12 ram12 0 0 0 0 0 0 0 0 0 0 0
1 13 ram13 0 0 0 0 0 0 0 0 0 0 0
1 14 ram14 0 0 0 0 0 0 0 0 0 0 0
1 15 ram15 0 0 0 0 0 0 0 0 0 0 0
7 0 loop0 0 0 0 0 0 0 0 0 0 0 0
7 1 loop1 0 0 0 0 0 0 0 0 0 0 0
7 2 loop2 0 0 0 0 0 0 0 0 0 0 0
7 3 loop3 0 0 0 0 0 0 0 0 0 0 0
7 4 loop4 0 0 0 0 0 0 0 0 0 0 0
7 5 loop5 0 0 0 0 0 0 0 0 0 0 0
7 6 loop6 0 0 0 0 0 0 0 0 0 0 0
7 7 loop7 0 0 0 0 0 0 0 0 0 0 0
8 0 sda 25354637 34367663 1003346126 18492372 28444756 11134226 505697032 63877960 0 9653880 82621804
8 1 sda1 250 0 2000 36 0 0 0 0 0 36 36
8 2 sda2 246 0 1968 32 0 0 0 0 0 32 32
8 3 sda3 340 13 2818 52 11 8 152 8 0 56 60
8 4 sda4 25353629 34367650 1003337964 18492232 27448755 11134218 505696880 61593380 0 7576432 80332428
252 0 dm-0 59910002 0 1003337218 46229572 39231014 0 505696880 1158557800 0 11325968 1206301256
252 1 dm-1 388 0 3104 84 74 0 592 0 0 76 84
252 2 dm-2 11571 0 308350 6536 153522 0 5093416 122884 0 65400 129416
252 3 dm-3 3870 0 3870 104 0 0 0 0 0 16 104
252 4 dm-4 392 0 1034 28 38 0 137 16 0 24 44
252 5 dm-5 3729 0 84279 924 98918 0 1151688 104684 0 58848 105632
179 0 mmcblk0 192 3 1560 156 0 0 0 0 0 136 156
179 1 mmcblk0p1 17 3 160 24 0 0 0 0 0 24 24
179 2 mmcblk0p2 95 0 760 68 0 0 0 0 0 68 68

31
collector/fixtures/interrupts Normal file
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@ -0,0 +1,31 @@
CPU0 CPU1 CPU2 CPU3
0: 18 0 0 0 IR-IO-APIC-edge timer
1: 17960 105 28 28 IR-IO-APIC-edge i8042
8: 1 0 0 0 IR-IO-APIC-edge rtc0
9: 398553 2320 824 863 IR-IO-APIC-fasteoi acpi
12: 380847 1021 240 198 IR-IO-APIC-edge i8042
16: 328511 322879 293782 351412 IR-IO-APIC-fasteoi ehci_hcd:usb1, mmc0
23: 1451445 3333499 1092032 2644609 IR-IO-APIC-fasteoi ehci_hcd:usb2
40: 0 0 0 0 DMAR_MSI-edge dmar0
41: 0 0 0 0 DMAR_MSI-edge dmar1
42: 378324 1734637 440240 2434308 IR-PCI-MSI-edge xhci_hcd
43: 7434032 8092205 6478877 7492252 IR-PCI-MSI-edge ahci
44: 140636 226313 347 633 IR-PCI-MSI-edge i915
45: 4 22 0 0 IR-PCI-MSI-edge mei_me
46: 43078464 130 460171 290 IR-PCI-MSI-edge iwlwifi
47: 350 224 0 0 IR-PCI-MSI-edge snd_hda_intel
NMI: 47 5031 6211 4968 Non-maskable interrupts
LOC: 174326351 135776678 168393257 130980079 Local timer interrupts
SPU: 0 0 0 0 Spurious interrupts
PMI: 47 5031 6211 4968 Performance monitoring interrupts
IWI: 1509379 2411776 1512975 2428828 IRQ work interrupts
RTR: 0 0 0 0 APIC ICR read retries
RES: 10847134 9111507 15999335 7457260 Rescheduling interrupts
CAL: 148554 157441 142912 155528 Function call interrupts
TLB: 10460334 9918429 10494258 10345022 TLB shootdowns
TRM: 0 0 0 0 Thermal event interrupts
THR: 0 0 0 0 Threshold APIC interrupts
MCE: 0 0 0 0 Machine check exceptions
MCP: 2406 2399 2399 2399 Machine check polls
ERR: 0
MIS: 0

1
collector/fixtures/loadavg Normal file
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@ -0,0 +1 @@
0.21 0.37 0.39 1/719 19737

42
collector/fixtures/meminfo Normal file
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@ -0,0 +1,42 @@
MemTotal: 3742148 kB
MemFree: 225472 kB
Buffers: 22040 kB
Cached: 930888 kB
SwapCached: 192504 kB
Active: 2233416 kB
Inactive: 1028728 kB
Active(anon): 2020004 kB
Inactive(anon): 883052 kB
Active(file): 213412 kB
Inactive(file): 145676 kB
Unevictable: 32 kB
Mlocked: 32 kB
SwapTotal: 4194300 kB
SwapFree: 3155360 kB
Dirty: 1052 kB
Writeback: 0 kB
AnonPages: 2244172 kB
Mapped: 239220 kB
Shmem: 593840 kB
Slab: 98932 kB
SReclaimable: 44772 kB
SUnreclaim: 54160 kB
KernelStack: 5800 kB
PageTables: 75212 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 6065372 kB
Committed_AS: 7835436 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 352840 kB
VmallocChunk: 34359338876 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 185660 kB
DirectMap2M: 3698688 kB

8
collector/fixtures/net-dev Normal file
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@ -0,0 +1,8 @@
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed
tun0: 1888 24 0 0 0 0 0 0 67120 934 0 0 0 0 0 0
veth4B09XN: 648 8 0 0 0 0 0 0 1943284 10640 0 0 0 0 0 0
lo: 435303245 1832522 0 0 0 0 0 0 435303245 1832522 0 0 0 0 0 0
lxcbr0: 0 0 0 0 0 0 0 0 2630299 28339 0 0 0 0 0 0
wlan0: 10437182923 13899359 0 0 0 0 0 0 2851649360 11726200 0 0 0 0 0 0
docker0: 64910168 1065585 0 0 0 0 0 0 2681662018 1929779 0 0 0 0 0 0

59
collector/native_collector.go
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@ -218,7 +218,11 @@ func getLoad() (float64, error) {
if err != nil { if err != nil {
return 0, err return 0, err
} }
parts := strings.Fields(string(data)) return parseLoad(string(data))
}
func parseLoad(data string) (float64, error) {
parts := strings.Fields(data)
load, err := strconv.ParseFloat(parts[0], 64) load, err := strconv.ParseFloat(parts[0], 64)
if err != nil { if err != nil {
return 0, fmt.Errorf("Could not parse load '%s': %s", parts[0], err) return 0, fmt.Errorf("Could not parse load '%s': %s", parts[0], err)
@ -277,13 +281,17 @@ func getSecondsSinceLastLogin() (float64, error) {
} }
func getMemInfo() (map[string]string, error) { func getMemInfo() (map[string]string, error) {
memInfo := map[string]string{} file, err := os.Open(procMemInfo)
fh, err := os.Open(procMemInfo)
if err != nil { if err != nil {
return nil, err return nil, err
} }
defer fh.Close() return parseMemInfo(file)
scanner := bufio.NewScanner(fh) }
func parseMemInfo(r io.ReadCloser) (map[string]string, error) {
defer r.Close()
memInfo := map[string]string{}
scanner := bufio.NewScanner(r)
for scanner.Scan() { for scanner.Scan() {
line := scanner.Text() line := scanner.Text()
parts := strings.Fields(string(line)) parts := strings.Fields(string(line))
@ -309,13 +317,17 @@ type interrupt struct {
} }
func getInterrupts() (map[string]interrupt, error) { func getInterrupts() (map[string]interrupt, error) {
interrupts := map[string]interrupt{} file, err := os.Open(procInterrupts)
fh, err := os.Open(procInterrupts)
if err != nil { if err != nil {
return nil, err return nil, err
} }
defer fh.Close() return parseInterrupts(file)
scanner := bufio.NewScanner(fh) }
func parseInterrupts(r io.ReadCloser) (map[string]interrupt, error) {
defer r.Close()
interrupts := map[string]interrupt{}
scanner := bufio.NewScanner(r)
if !scanner.Scan() { if !scanner.Scan() {
return nil, fmt.Errorf("%s empty", procInterrupts) return nil, fmt.Errorf("%s empty", procInterrupts)
} }
@ -344,15 +356,20 @@ func getInterrupts() (map[string]interrupt, error) {
} }
func getNetStats() (map[string]map[string]map[string]string, error) { func getNetStats() (map[string]map[string]map[string]string, error) {
netStats := map[string]map[string]map[string]string{} file, err := os.Open(procNetDev)
netStats["transmit"] = map[string]map[string]string{}
netStats["receive"] = map[string]map[string]string{}
fh, err := os.Open(procNetDev)
if err != nil { if err != nil {
return nil, err return nil, err
} }
defer fh.Close() return parseNetStats(file)
scanner := bufio.NewScanner(fh) }
func parseNetStats(r io.ReadCloser) (map[string]map[string]map[string]string, error) {
defer r.Close()
netStats := map[string]map[string]map[string]string{}
netStats["transmit"] = map[string]map[string]string{}
netStats["receive"] = map[string]map[string]string{}
scanner := bufio.NewScanner(r)
scanner.Scan() // skip first header scanner.Scan() // skip first header
scanner.Scan() scanner.Scan()
parts := strings.Split(string(scanner.Text()), "|") parts := strings.Split(string(scanner.Text()), "|")
@ -393,13 +410,17 @@ func parseNetDevLine(parts []string, header []string) (map[string]string, error)
} }
func getDiskStats() (map[string]map[string]string, error) { func getDiskStats() (map[string]map[string]string, error) {
diskStats := map[string]map[string]string{} file, err := os.Open(procDiskStats)
fh, err := os.Open(procDiskStats)
if err != nil { if err != nil {
return nil, err return nil, err
} }
defer fh.Close() return parseDiskStats(file)
scanner := bufio.NewScanner(fh) }
func parseDiskStats(r io.ReadCloser) (map[string]map[string]string, error) {
defer r.Close()
diskStats := map[string]map[string]string{}
scanner := bufio.NewScanner(r)
for scanner.Scan() { for scanner.Scan() {
parts := strings.Fields(string(scanner.Text())) parts := strings.Fields(string(scanner.Text()))
if len(parts) != len(diskStatsHeader)+3 { // we strip major, minor and dev if len(parts) != len(diskStatsHeader)+3 { // we strip major, minor and dev

118
collector/native_collector_test.go Normal file
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@ -0,0 +1,118 @@
package collector
import (
"io/ioutil"
"os"
"testing"
)
const (
loadExpected = 0.21
memTotalExpected = "3742148"
memDirectMap2MExpected = "3698688"
interruptsNmi1Expected = "5031"
netReceiveWlan0Bytes = "10437182923"
netTransmitTun0Packages = "934"
diskSda4ReadsCompleted = "25353629"
diskMmcIoTimeWeighted = "68"
testProcLoad = "fixtures/loadavg"
testProcMemInfo = "fixtures/meminfo"
testProcInterrupts = "fixtures/interrupts"
testProcNetDev = "fixtures/net-dev"
testProcDiskStats = "fixtures/diskstats"
)
func TestLoad(t *testing.T) {
data, err := ioutil.ReadFile(testProcLoad)
if err != nil {
t.Fatal(err)
}
load, err := parseLoad(string(data))
if err != nil {
t.Fatal(err)
}
if load != loadExpected {
t.Fatalf("Unexpected load: %f != %f", load, loadExpected)
}
}
func TestMemInfo(t *testing.T) {
file, err := os.Open(testProcMemInfo)
if err != nil {
t.Fatal(err)
}
memInfo, err := parseMemInfo(file)
if err != nil {
t.Fatal(err)
}
if memInfo["MemTotal_kB"] != memTotalExpected {
t.Fatalf("Unexpected memory: %s != %s", memInfo["MemTotal_kB"], memTotalExpected)
}
if memInfo["DirectMap2M_kB"] != memDirectMap2MExpected {
t.Fatalf("Unexpected memory: %s != %s", memInfo["MemTotal_kB"], memTotalExpected)
}
}
func TestInterrupts(t *testing.T) {
file, err := os.Open(testProcInterrupts)
if err != nil {
t.Fatal(err)
}
interrupts, err := parseInterrupts(file)
if err != nil {
t.Fatal(err)
}
if interrupts["NMI"].values[1] != interruptsNmi1Expected {
t.Fatalf("Unexpected interrupts: %s != %s", interrupts["NMI"].values[1],
interruptsNmi1Expected)
}
}
func TestNetStats(t *testing.T) {
file, err := os.Open(testProcNetDev)
if err != nil {
t.Fatal(err)
}
netStats, err := parseNetStats(file)
if err != nil {
t.Fatal(err)
}
if netStats["receive"]["wlan0"]["bytes"] != netReceiveWlan0Bytes {
t.Fatalf("Unexpected netstats: %s != %s", netStats["receive"]["wlan0"]["bytes"],
netReceiveWlan0Bytes)
}
if netStats["transmit"]["tun0"]["packets"] != netTransmitTun0Packages {
t.Fatalf("Unexpected netstats: %s != %s", netStats["transmit"]["tun0"]["packets"],
netTransmitTun0Packages)
}
}
func TestDiskStats(t *testing.T) {
file, err := os.Open(testProcDiskStats)
if err != nil {
t.Fatal(err)
}
diskStats, err := parseDiskStats(file)
if err != nil {
t.Fatal(err)
}
if diskStats["sda4"]["reads_completed"] != diskSda4ReadsCompleted {
t.Fatalf("Unexpected diskstats: %s != %s", diskStats["sda4"]["reads_completed"],
diskSda4ReadsCompleted)
}
if diskStats["mmcblk0p2"]["io_time_weighted"] != diskMmcIoTimeWeighted {
t.Fatalf("Unexpected diskstats: %s != %s",
diskStats["mmcblk0p2"]["io_time_weighted"], diskMmcIoTimeWeighted)
}
}

2
node_exporter.go
View file

@ -58,7 +58,7 @@ func main() {
if err != nil { if err != nil {
log.Fatalf("Couldn't load config and collectors: %s", err) log.Fatalf("Couldn't load config and collectors: %s", err)
} }
log.Printf("Reload collectors and config") log.Printf("Reloaded collectors and config")
tick = time.Tick(*interval) tick = time.Tick(*interval)
case <-tick: case <-tick: