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run.go
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run.go
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package subcmd
import (
"context"
"fmt"
influxdb "github.com/influxdata/influxdb1-client"
"github.com/michaelquigley/pfxlog"
"github.com/openziti/foundation/metrics"
"github.com/openziti/sdk-golang/ziti"
"github.com/openziti/sdk-golang/ziti/config"
"github.com/openziti/sdk-golang/ziti/edge"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"net"
"net/http"
"net/url"
"os"
"reflect"
"sync/atomic"
"time"
"unsafe"
)
var runCmd = &cobra.Command{
Use: "run <config>",
Short: "Runs ziti probe",
Long: "runs ziti probe: captures latency to edge routers and submits them to probe-service",
Args: cobra.MaximumNArgs(1),
Run: theProbe.run,
}
const (
DefaultDbName = "ziti"
DefaultDbType = "influxdb"
DefaultInterval = 5 * 60 // 5 minutes
ProbeService = "probe-service"
)
func init() {
root.AddCommand(runCmd)
}
var log = pfxlog.Logger()
type probeCfg struct {
dbName string
dbType string
dbUser string
dbPassword string
interval int
}
var defaultConfig = probeCfg{
dbName: DefaultDbName,
dbType: DefaultDbType,
interval: DefaultInterval,
}
type probe struct {
cfg *probeCfg
influxDb *influxdb.Client
ctx ziti.Context
latest atomic.Value
closer chan interface{}
}
var theProbe = &probe{
closer: make(chan interface{}),
}
func (p *probe) sendMetrics() {
for {
select {
case <-time.After(time.Duration(p.cfg.interval) * time.Second):
message := p.ctx.Metrics().Poll()
if message == nil {
continue
}
bp, err := metrics.AsBatch(message)
if err != nil {
logrus.Errorln(err)
return
}
bp.Database = p.cfg.dbName
_, err = p.influxDb.Write(*bp)
if err == nil {
logrus.Debug("write complete")
} else {
logrus.Errorf("error writing to influxdb: %v", err)
for {
logrus.Info("attempting to reconnect")
if service, ok := p.ctx.GetService(ProbeService); ok {
if err := p.connectToInfluxDb(service); err == nil {
logrus.Info("reconnected")
if _, err = p.influxDb.Write(*bp); err != nil {
logrus.Errorf("failed to write after reconnect")
} else {
break
}
} else {
logrus.Errorf("failed to reconnect: %v", err)
}
} else {
logrus.Errorf("could not find %s", ProbeService)
}
time.Sleep(30 * time.Second)
}
}
}
}
}
func (p *probe) run(_ *cobra.Command, args []string) {
var err error
if len(args) == 0 {
log.Infof("loading ziti identity from env.ZITI_SDK_CONFIG[%s]", os.Getenv("ZITI_SDK_CONFIG"))
p.ctx = ziti.NewContext()
} else {
if cfg, err := config.NewFromFile(args[0]); err != nil {
log.WithError(err).Fatalf("failed to load config from file[%s]", args[0])
} else {
cfg.ConfigTypes = append(cfg.ConfigTypes, "ziti-probe-config.v1")
p.ctx = ziti.NewContextWithConfig(cfg)
}
}
for {
if err = p.ctx.Authenticate(); err != nil {
sleepDuration := 5 * time.Second
log.Errorf("failed to authenticate, trying again in %.2f seconds: %v", sleepDuration.Seconds(), err)
time.Sleep(sleepDuration)
} else {
break
}
}
for {
if _, err = p.ctx.GetServices(); err != nil {
sleepDuration := 5 * time.Second
log.Errorf("failed to load available services, try again in %.2f seconds: %v", sleepDuration.Seconds(), err)
time.Sleep(sleepDuration)
} else {
break
}
}
var service *edge.Service
for {
var found bool
service, found = p.ctx.GetService(ProbeService)
if !found {
sleepDuration := 5 * time.Second
log.Errorf("required service was not found, try again in %.2f seconds", sleepDuration.Seconds())
time.Sleep(sleepDuration)
} else {
break
}
}
for {
err := p.connectToInfluxDb(service)
if err != nil {
sleepDuration := 5 * time.Second
log.Errorf("could not connect to influxDb, trying again in %.2f seconds: %v", sleepDuration.Seconds(), err)
time.Sleep(sleepDuration)
} else {
break
}
}
go p.sendMetrics()
select {
case <-p.closer:
}
p.ctx.Close()
}
func (p *probe) connectToInfluxDb(service *edge.Service) error {
p.cfg = getProbeConfig(service)
var err error
p.influxDb, err = p.createInfluxDbClient(p.cfg)
if err != nil {
return fmt.Errorf("could not create influxDb client: %v", err)
}
_, res, err := p.influxDb.Ping()
if err != nil {
return fmt.Errorf("failed to get influxDb server info: %v", err)
}
log.Info("connected to influx version = ", res)
return nil
}
func getProbeConfig(service *edge.Service) *probeCfg {
cfg, found := service.Configs["ziti-probe-config.v1"]
if !found {
return &defaultConfig
}
dbName := DefaultDbName
if val, found := cfg["dbName"]; found {
if str, ok := val.(string); ok {
dbName = str
}
}
dbType := DefaultDbType
if val, found := cfg["dbType"]; found {
if str, ok := val.(string); ok {
dbType = str
}
}
var dbUser string
if val, found := cfg["dbUser"]; found {
if str, ok := val.(string); ok {
dbUser = str
}
}
var dbPassword string
if val, found := cfg["dbPassword"]; found {
if str, ok := val.(string); ok {
dbPassword = str
}
}
interval := DefaultInterval
if val, found := cfg["interval"]; found {
if flt, ok := val.(float64); ok {
interval = int(flt)
}
}
return &probeCfg{
dbName: dbName,
dbType: dbType,
dbUser: dbUser,
dbPassword: dbPassword,
interval: interval,
}
}
func (p *probe) createInfluxDbClient(cfg *probeCfg) (*influxdb.Client, error) {
httpC := &http.Client{
Transport: &http.Transport{
DialContext: func(c context.Context, network, addr string) (net.Conn, error) {
log.Infof("connecting to %s:%s", network, addr)
return p.ctx.Dial("probe-service")
},
},
}
influxConfig := influxdb.NewConfig()
u, _ := url.Parse("http://" + ProbeService)
influxConfig.URL = *u
influxConfig.Username = cfg.dbUser
influxConfig.Password = cfg.dbPassword
clt, _ := influxdb.NewClient(influxConfig)
ic := reflect.ValueOf(clt)
ict := ic.Type()
hcf, _ := ict.Elem().FieldByName("httpClient")
hcp := unsafe.Pointer(uintptr(unsafe.Pointer(clt)) + hcf.Offset)
httpCppClient := (**http.Client)(hcp)
*httpCppClient = httpC
return clt, nil
}