forked from djatlantic/sysinfo_influxdb
/
main.go
628 lines (533 loc) · 15.5 KB
/
main.go
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// sysinfo_influxdb by Novaquark
//
// To the extent possible under law, the person who associated CC0 with
// sysinfo_influxdb has waived all copyright and related or neighboring rights
// to sysinfo_influxdb.
//
// You should have received a copy of the CC0 legalcode along with this
// work. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
package main
import (
"bufio"
"encoding/json"
"flag"
"fmt"
"github.com/cloudfoundry/gosigar"
influxClient "github.com/influxdb/influxdb/client"
"io/ioutil"
"net/url"
"os"
"os/exec"
"sort"
"strconv"
"strings"
"syscall"
"time"
)
type chan_ret_t struct {
series []*influxClient.Point
err error
}
const APP_VERSION = "0.5.6"
// Variables storing arguments flags
var verboseFlag bool
var versionFlag bool
var daemonFlag bool
var daemonIntervalFlag time.Duration
var daemonConsistencyFlag time.Duration
var consistencyFactor = 1.0
var collectFlag string
var pidFile string
var sslFlag bool
var hostFlag string
var usernameFlag string
var passwordFlag string
var secretFlag string
var databaseFlag string
var retentionPolicyFlag string
func init() {
flag.BoolVar(&versionFlag, "version", false, "Print the version number and exit.")
flag.BoolVar(&versionFlag, "V", false, "Print the version number and exit (shorthand).")
flag.BoolVar(&verboseFlag, "verbose", false, "Display debug information: choose between text or JSON.")
flag.BoolVar(&verboseFlag, "v", false, "Display debug information: choose between text or JSON (shorthand).")
flag.BoolVar(&sslFlag, "ssl", false, "Enable SSL/TLS encryption.")
flag.BoolVar(&sslFlag, "S", false, "Enable SSL/TLS encryption (shorthand).")
flag.StringVar(&hostFlag, "host", "localhost:8086", "Connect to host.")
flag.StringVar(&hostFlag, "h", "localhost:8086", "Connect to host (shorthand).")
flag.StringVar(&usernameFlag, "username", "root", "User for login.")
flag.StringVar(&usernameFlag, "u", "root", "User for login (shorthand).")
flag.StringVar(&passwordFlag, "password", "root", "Password to use when connecting to server.")
flag.StringVar(&passwordFlag, "p", "root", "Password to use when connecting to server (shorthand).")
flag.StringVar(&secretFlag, "secret", "", "Absolute path to password file (shorthand). '-p' is ignored if specifed.")
flag.StringVar(&secretFlag, "s", "", "Absolute path to password file. '-p' is ignored if specifed.")
flag.StringVar(&databaseFlag, "database", "", "Name of the database to use.")
flag.StringVar(&databaseFlag, "d", "", "Name of the database to use (shorthand).")
flag.StringVar(&retentionPolicyFlag, "retentionpolicy", "", "Name of the retention policy to use.")
flag.StringVar(&retentionPolicyFlag, "rp", "", "Name of the retention policy to use (shorthand).")
flag.StringVar(&collectFlag, "collect", "cpu,cpus,mem,swap,uptime,load,network,disks,mounts", "Chose which data to collect.")
flag.StringVar(&collectFlag, "c", "cpu,cpus,mem,swap,uptime,load,network,disks,mounts", "Chose which data to collect (shorthand).")
flag.BoolVar(&daemonFlag, "daemon", false, "Run in daemon mode.")
flag.BoolVar(&daemonFlag, "D", false, "Run in daemon mode (shorthand).")
flag.DurationVar(&daemonIntervalFlag, "interval", time.Second, "With daemon mode, change time between checks.")
flag.DurationVar(&daemonIntervalFlag, "i", time.Second, "With daemon mode, change time between checks (shorthand).")
flag.DurationVar(&daemonConsistencyFlag, "consistency", time.Second, "With custom interval, duration to bring back collected values for data consistency (0s to disable).")
flag.DurationVar(&daemonConsistencyFlag, "C", time.Second, "With daemon mode, duration to bring back collected values for data consistency (shorthand).")
flag.StringVar(&pidFile, "pidfile", "", "the pid file")
}
func getFqdn() string {
// Note: We use exec here instead of os.Hostname() because we
// want the FQDN, and this is the easiest way to get it.
fqdn, err := exec.Command("hostname", "-f").Output()
// Fallback on Unqualifed name
if err != nil {
hostname, _ := os.Hostname()
return hostname
}
return strings.TrimSpace(string(fqdn))
}
// "in_array" style func for strings
func stringInSlice(a string, list []string) bool {
for _, b := range list {
if b == a {
return true
}
}
return false
}
func main() {
flag.Parse() // Scan the arguments list
if versionFlag {
fmt.Println("Version:", APP_VERSION)
} else {
if pidFile != "" {
pid := strconv.Itoa(os.Getpid())
if err := ioutil.WriteFile(pidFile, []byte(pid), 0644); err != nil {
fmt.Fprintf(os.Stderr, "Unable to create pidfile\n")
panic(err)
}
}
if daemonConsistencyFlag.Seconds() > 0 {
consistencyFactor = daemonConsistencyFlag.Seconds() / daemonIntervalFlag.Seconds()
}
// Fill InfluxDB connection settings
var client *influxClient.Client = nil
if databaseFlag != "" {
var proto string
if sslFlag {
proto = "https"
} else {
proto = "http"
}
var u, _ = url.Parse(fmt.Sprintf("%s://%s/", proto, hostFlag))
config := influxClient.Config{URL: *u, Username: usernameFlag, UserAgent: "sysinfo_influxdb v" + APP_VERSION}
// use secret file if present, fallback to CLI password arg
if secretFlag != "" {
data, err := ioutil.ReadFile(secretFlag)
if err != nil {
panic(err)
}
config.Password = strings.Split(string(data), "\n")[0]
} else {
config.Password = passwordFlag
}
var err error
client, err = influxClient.NewClient(config)
if err != nil {
panic(err)
}
}
// Build collect list
var collectList []GatherFunc
for _, c := range strings.Split(collectFlag, ",") {
switch strings.Trim(c, " ") {
case "cpu":
collectList = append(collectList, cpu)
case "cpus":
collectList = append(collectList, cpus)
case "mem":
collectList = append(collectList, mem)
case "swap":
collectList = append(collectList, swap)
case "uptime":
collectList = append(collectList, uptime)
case "load":
collectList = append(collectList, load)
case "network":
collectList = append(collectList, network)
case "disks":
collectList = append(collectList, disks)
case "mounts":
collectList = append(collectList, mounts)
default:
fmt.Fprintf(os.Stderr, "Unknown collect option `%s'\n", c)
return
}
}
ch := make(chan chan_ret_t, len(collectList))
// Without daemon mode, do at least one lap
first := true
for first || daemonFlag {
first = false
// Collect data
var data []influxClient.Point
for _, cl := range collectList {
go cl(ch)
}
for i := len(collectList); i > 0; i-- {
res := <-ch
if res.err != nil {
fmt.Fprintf(os.Stderr, "%s\n", res.err)
} else if len(res.series) > 0 {
for _, v := range res.series {
if v != nil {
data = append(data, *v)
} else {
// Loop if we haven't all data:
// Since diffed data didn't respond the
// first time they are collected, loop
// one more time to have it
first = true
}
}
} else {
first = true
}
}
if !first {
for _, serie := range data {
serie.Tags["fqdn"] = getFqdn()
}
// Show data
if !first && (databaseFlag == "" || verboseFlag) {
b, _ := json.Marshal(data)
fmt.Printf("%s\n", b)
}
// Send data
if client != nil {
if err := send(client, data); err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err)
}
}
}
if daemonFlag || first {
time.Sleep(daemonIntervalFlag)
}
}
}
}
/**
* Interactions with InfluxDB
*/
func send(client *influxClient.Client, series []influxClient.Point) error {
w := influxClient.BatchPoints{Database: databaseFlag, Points: series}
if retentionPolicyFlag != "" {
w.RetentionPolicy = retentionPolicyFlag
}
_, err := client.Write(w)
return err
}
/**
* Diff function
*/
var last_series = make(map[string]map[string]interface{})
func DiffFromLast(serie *influxClient.Point) *influxClient.Point {
notComplete := false
var keys []string
for k := range serie.Tags {
keys = append(keys, k)
}
sort.Strings(keys)
key := serie.Measurement + "#"
for _, k := range keys {
key += k + ":" + serie.Tags[k] + "|"
}
if _, ok := last_series[key]; !ok {
last_series[key] = make(map[string]interface{})
}
for i, _ := range serie.Fields {
var val interface{}
var ok bool
if val, ok = last_series[key][i]; !ok {
notComplete = true
last_series[key][i] = serie.Fields[i]
continue
} else {
last_series[key][i] = serie.Fields[i]
}
switch serie.Fields[i].(type) {
case int8:
serie.Fields[i] = int8(float64(serie.Fields[i].(int8)-val.(int8)) * consistencyFactor)
case int16:
serie.Fields[i] = int16(float64(serie.Fields[i].(int16)-val.(int16)) * consistencyFactor)
case int32:
serie.Fields[i] = int32(float64(serie.Fields[i].(int32)-val.(int32)) * consistencyFactor)
case int64:
serie.Fields[i] = int64(float64(serie.Fields[i].(int64)-val.(int64)) * consistencyFactor)
case uint8:
serie.Fields[i] = uint8(float64(serie.Fields[i].(uint8)-val.(uint8)) * consistencyFactor)
case uint16:
serie.Fields[i] = uint16(float64(serie.Fields[i].(uint16)-val.(uint16)) * consistencyFactor)
case uint32:
serie.Fields[i] = uint32(float64(serie.Fields[i].(uint32)-val.(uint32)) * consistencyFactor)
case uint64:
serie.Fields[i] = uint64(float64(serie.Fields[i].(uint64)-val.(uint64)) * consistencyFactor)
case int:
serie.Fields[i] = int(float64(serie.Fields[i].(int)-val.(int)) * consistencyFactor)
case uint:
serie.Fields[i] = uint(float64(serie.Fields[i].(uint)-val.(uint)) * consistencyFactor)
}
}
if notComplete {
return nil
} else {
return serie
}
}
/**
* Gathering functions
*/
type GatherFunc func(chan chan_ret_t)
func cpu(ch chan chan_ret_t) {
cpu := sigar.Cpu{}
if err := cpu.Get(); err != nil {
ch <- chan_ret_t{nil, err}
return
}
serie := &influxClient.Point{
Measurement: "cpu",
Tags: map[string]string{
"cpuid": "all",
},
Fields: map[string]interface{}{
"user": cpu.User,
"nice": cpu.Nice,
"sys": cpu.Sys,
"idle": cpu.Idle,
"wait": cpu.Wait,
"total": cpu.Total(),
},
}
ch <- chan_ret_t{[]*influxClient.Point{DiffFromLast(serie)}, nil}
}
func cpus(ch chan chan_ret_t) {
var series []*influxClient.Point
cpus := sigar.CpuList{}
cpus.Get()
for i, cpu := range cpus.List {
serie := &influxClient.Point{
Measurement: "cpus",
Tags: map[string]string{
"cpuid": fmt.Sprint(i),
},
Fields: map[string]interface{}{
"user": cpu.User,
"nice": cpu.Nice,
"sys": cpu.Sys,
"idle": cpu.Idle,
"wait": cpu.Wait,
"total": cpu.Total(),
},
}
if serie = DiffFromLast(serie); serie != nil {
series = append(series, serie)
}
}
ch <- chan_ret_t{series, nil}
}
func mem(ch chan chan_ret_t) {
mem := sigar.Mem{}
if err := mem.Get(); err != nil {
ch <- chan_ret_t{nil, err}
}
serie := &influxClient.Point{
Measurement: "mem",
Tags: map[string]string{},
Fields: map[string]interface{}{
"free": mem.Free,
"used": mem.Used,
"actualfree": mem.ActualFree,
"actualused": mem.ActualUsed,
"total": mem.Total,
},
}
ch <- chan_ret_t{[]*influxClient.Point{serie}, nil}
}
func swap(ch chan chan_ret_t) {
swap := sigar.Swap{}
if err := swap.Get(); err != nil {
ch <- chan_ret_t{nil, err}
return
}
serie := &influxClient.Point{
Measurement: "swap",
Tags: map[string]string{},
Fields: map[string]interface{}{
"free": swap.Free,
"used": swap.Used,
"total": swap.Total,
},
}
ch <- chan_ret_t{[]*influxClient.Point{serie}, nil}
}
func uptime(ch chan chan_ret_t) {
uptime := sigar.Uptime{}
if err := uptime.Get(); err != nil {
ch <- chan_ret_t{nil, err}
return
}
serie := &influxClient.Point{
Measurement: "uptime",
Tags: map[string]string{},
Fields: map[string]interface{}{
"length": uptime.Length,
},
}
ch <- chan_ret_t{[]*influxClient.Point{serie}, nil}
}
func load(ch chan chan_ret_t) {
load := sigar.LoadAverage{}
if err := load.Get(); err != nil {
ch <- chan_ret_t{nil, err}
return
}
serie := &influxClient.Point{
Measurement: "load",
Tags: map[string]string{},
Fields: map[string]interface{}{
"one": load.One,
"five": load.Five,
"fifteen": load.Fifteen,
},
}
ch <- chan_ret_t{[]*influxClient.Point{serie}, nil}
}
func network(ch chan chan_ret_t) {
fi, err := os.Open("/proc/net/dev")
if err != nil {
ch <- chan_ret_t{nil, err}
return
}
defer fi.Close()
var series []*influxClient.Point
cols := []string{"recv_bytes", "recv_packets", "recv_errs", "recv_drop",
"recv_fifo", "recv_frame", "recv_compressed",
"recv_multicast", "trans_bytes", "trans_packets",
"trans_errs", "trans_drop", "trans_fifo",
"trans_colls", "trans_carrier", "trans_compressed"}
// Search interface
skip := 2
scanner := bufio.NewScanner(fi)
for scanner.Scan() {
// Skip headers
if skip > 0 {
skip--
continue
}
line := scanner.Text()
tmp := strings.Split(line, ":")
if len(tmp) < 2 {
ch <- chan_ret_t{nil, nil}
return
}
serie := &influxClient.Point{
Measurement: "network",
Tags: map[string]string{
"iface": strings.Trim(tmp[0], " "),
},
Fields: map[string]interface{}{},
}
tmpf := strings.Fields(tmp[1])
for i, vc := range cols {
if vt, err := strconv.Atoi(tmpf[i]); err == nil {
serie.Fields[vc] = vt
} else {
serie.Fields[vc] = 0
}
}
if serie = DiffFromLast(serie); serie != nil {
series = append(series, serie)
}
}
ch <- chan_ret_t{series, nil}
}
func disks(ch chan chan_ret_t) {
fi, err := os.Open("/proc/diskstats")
if err != nil {
ch <- chan_ret_t{nil, err}
return
}
defer fi.Close()
var series []*influxClient.Point
cols := []string{"read_ios", "read_merges", "read_sectors", "read_ticks",
"write_ios", "write_merges", "write_sectors", "write_ticks",
"in_flight", "io_ticks", "time_in_queue"}
// Search device
scanner := bufio.NewScanner(fi)
for scanner.Scan() {
tmp := strings.Fields(scanner.Text())
if len(tmp) < 14 {
ch <- chan_ret_t{nil, nil}
return
}
serie := &influxClient.Point{
Measurement: "disks",
Tags: map[string]string{
"device": strings.Trim(tmp[2], " "),
},
Fields: map[string]interface{}{},
}
for i, vc := range cols {
if vt, err := strconv.Atoi(tmp[3+i]); err == nil {
serie.Fields[vc] = vt
} else {
serie.Fields[vc] = 0
}
}
if serie = DiffFromLast(serie); serie != nil {
series = append(series, serie)
}
}
ch <- chan_ret_t{series, nil}
}
func mounts(ch chan chan_ret_t) {
fi, err := os.Open("/proc/mounts")
if err != nil {
ch <- chan_ret_t{nil, err}
return
}
defer fi.Close()
var series []*influxClient.Point
// Exclude virtual & system fstype
sysfs := []string{"binfmt_misc", "cgroup", "configfs", "debugfs",
"devpts", "devtmpfs", "efivarfs", "fusectl", "mqueue",
"none", "proc", "rootfs", "securityfs", "sysfs",
"rpc_pipefs", "fuse.gvfsd-fuse", "tmpfs"}
scanner := bufio.NewScanner(fi)
for scanner.Scan() {
tmp := strings.Fields(scanner.Text())
// Some hack needed to remove "none" virtual mountpoints
if (stringInSlice(tmp[2], sysfs) == false) && (tmp[0] != "none") {
fs := syscall.Statfs_t{}
err := syscall.Statfs(tmp[1], &fs)
if err != nil {
ch <- chan_ret_t{nil, err}
return
}
serie := &influxClient.Point{
Measurement: "mounts",
Tags: map[string]string{
"disk": tmp[0],
"mountpoint": tmp[1],
},
Fields: map[string]interface{}{
"free": fs.Bfree * uint64(fs.Bsize),
"total": fs.Blocks * uint64(fs.Bsize),
},
}
if serie = DiffFromLast(serie); serie != nil {
series = append(series, serie)
}
}
}
ch <- chan_ret_t{series, nil}
}