cmd/stunstamp: remove sqlite DB and API (#12604)

stunstamp now sends data to Prometheus via remote write, and Prometheus
can serve the same data. Retaining and cleaning up old data in sqlite
leads to long probing pauses, and it's not worth investing more effort
to optimize the schema and/or concurrency model.

Updates tailscale/corp#20344

Signed-off-by: Jordan Whited <jordan@tailscale.com>
pull/12610/head
Jordan Whited 4 months ago committed by GitHub
parent 3485e4bf5a
commit 94415e8029
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194

@ -1,142 +0,0 @@
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package main
import (
"compress/gzip"
"encoding/json"
"errors"
"net/http"
"net/url"
"strconv"
"strings"
"time"
sq "github.com/Masterminds/squirrel"
)
type api struct {
db *db
mux *http.ServeMux
}
func newAPI(db *db) *api {
a := &api{
db: db,
}
mux := http.NewServeMux()
mux.HandleFunc("/query", a.query)
a.mux = mux
return a
}
type apiResult struct {
At int `json:"at"` // time.Time.Unix()
RegionID int `json:"regionID"`
Hostname string `json:"hostname"`
Af int `json:"af"` // 4 or 6
Addr string `json:"addr"`
Source int `json:"source"` // timestampSourceUserspace (0) or timestampSourceKernel (1)
StableConn bool `json:"stableConn"`
DstPort int `json:"dstPort"`
RttNS *int `json:"rttNS"`
}
func getTimeBounds(vals url.Values) (from time.Time, to time.Time, err error) {
lastForm, ok := vals["last"]
if ok && len(lastForm) > 0 {
dur, err := time.ParseDuration(lastForm[0])
if err != nil {
return time.Time{}, time.Time{}, err
}
now := time.Now()
return now.Add(-dur), now, nil
}
fromForm, ok := vals["from"]
if ok && len(fromForm) > 0 {
fromUnixSec, err := strconv.Atoi(fromForm[0])
if err != nil {
return time.Time{}, time.Time{}, err
}
from = time.Unix(int64(fromUnixSec), 0)
toForm, ok := vals["to"]
if ok && len(toForm) > 0 {
toUnixSec, err := strconv.Atoi(toForm[0])
if err != nil {
return time.Time{}, time.Time{}, err
}
to = time.Unix(int64(toUnixSec), 0)
} else {
return time.Time{}, time.Time{}, errors.New("from specified without to")
}
return from, to, nil
}
// no time bounds specified, default to last 1h
now := time.Now()
return now.Add(-time.Hour), now, nil
}
func (a *api) ServeHTTP(w http.ResponseWriter, r *http.Request) {
a.mux.ServeHTTP(w, r)
}
func (a *api) query(w http.ResponseWriter, r *http.Request) {
err := r.ParseForm()
if err != nil {
http.Error(w, err.Error(), 500)
return
}
from, to, err := getTimeBounds(r.Form)
if err != nil {
http.Error(w, err.Error(), 500)
return
}
sb := sq.Select("at_unix", "region_id", "hostname", "af", "address", "timestamp_source", "stable_conn", "dst_port", "rtt_ns").From("rtt")
sb = sb.Where(sq.And{
sq.GtOrEq{"at_unix": from.Unix()},
sq.LtOrEq{"at_unix": to.Unix()},
})
query, args, err := sb.ToSql()
if err != nil {
return
}
rows, err := a.db.Query(query, args...)
if err != nil {
http.Error(w, err.Error(), 500)
return
}
results := make([]apiResult, 0)
for rows.Next() {
rtt := 0
result := apiResult{
RttNS: &rtt,
}
err = rows.Scan(&result.At, &result.RegionID, &result.Hostname, &result.Af, &result.Addr, &result.Source, &result.StableConn, &result.DstPort, &result.RttNS)
if err != nil {
http.Error(w, err.Error(), 500)
return
}
results = append(results, result)
}
if rows.Err() != nil {
http.Error(w, rows.Err().Error(), 500)
return
}
if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
gz := gzip.NewWriter(w)
defer gz.Close()
w.Header().Set("Content-Encoding", "gzip")
err = json.NewEncoder(gz).Encode(&results)
} else {
err = json.NewEncoder(w).Encode(&results)
}
if err != nil {
http.Error(w, err.Error(), 500)
return
}
}

@ -38,11 +38,8 @@ import (
var (
flagDERPMap = flag.String("derp-map", "https://login.tailscale.com/derpmap/default", "URL to DERP map")
flagOut = flag.String("out", "", "output sqlite filename")
flagInterval = flag.Duration("interval", time.Minute, "interval to probe at in time.ParseDuration() format")
flagAPI = flag.String("api", "", "listen addr for HTTP API")
flagIPv6 = flag.Bool("ipv6", false, "probe IPv6 addresses")
flagRetention = flag.Duration("retention", time.Hour*24*7, "sqlite retention period in time.ParseDuration() format")
flagRemoteWriteURL = flag.String("rw-url", "", "prometheus remote write URL")
flagInstance = flag.String("instance", "", "instance label value; defaults to hostname if unspecified")
flagDstPorts = flag.String("dst-ports", "", "comma-separated list of destination ports to monitor")
@ -639,15 +636,9 @@ func main() {
if len(*flagDERPMap) < 1 {
log.Fatal("derp-map flag is unset")
}
if len(*flagOut) < 1 {
log.Fatal("out flag is unset")
}
if *flagInterval < minInterval || *flagInterval > maxBufferDuration {
log.Fatalf("interval must be >= %s and <= %s", minInterval, maxBufferDuration)
}
if *flagRetention < *flagInterval {
log.Fatal("retention must be >= interval")
}
if len(*flagRemoteWriteURL) < 1 {
log.Fatal("rw-url flag is unset")
}
@ -693,49 +684,6 @@ func main() {
}
}
db, err := newDB(*flagOut)
if err != nil {
log.Fatalf("error opening output file for writing: %v", err)
}
defer db.Close()
_, err = db.Exec("PRAGMA journal_mode=WAL")
if err != nil {
log.Fatalf("error enabling WAL mode: %v", err)
}
// No indices or primary key. Keep it simple for now. Reads will be full
// scans. We can AUTOINCREMENT rowid in the future and hold an in-memory
// index to at_unix if needed as reads are almost always going to be
// time-bound (e.g. WHERE at_unix >= ?). At the time of authorship we have
// ~300 data points per-interval w/o ipv6 w/kernel timestamping resulting
// in ~2.6m rows in 24h w/a 10s probe interval.
_, err = db.Exec(`
CREATE TABLE IF NOT EXISTS rtt(at_unix INT, region_id INT, hostname TEXT, af INT, address TEXT, timestamp_source INT, stable_conn INT, dst_port INT, rtt_ns INT)
`)
if err != nil {
log.Fatalf("error initializing db: %v", err)
}
wg := sync.WaitGroup{}
httpErrCh := make(chan error, 1)
var httpServer *http.Server
if len(*flagAPI) > 0 {
api := newAPI(db)
httpServer = &http.Server{
Addr: *flagAPI,
Handler: api,
ReadTimeout: time.Second * 60,
WriteTimeout: time.Second * 60,
}
wg.Add(1)
go func() {
err := httpServer.ListenAndServe()
httpErrCh <- err
wg.Done()
}()
}
tsCh := make(chan []prompb.TimeSeries, maxBufferDuration / *flagInterval)
remoteWriteDoneCh := make(chan struct{})
rwc := newRemoteWriteClient(*flagRemoteWriteURL)
@ -745,9 +693,6 @@ CREATE TABLE IF NOT EXISTS rtt(at_unix INT, region_id INT, hostname TEXT, af INT
}()
shutdown := func() {
if httpServer != nil {
httpServer.Close()
}
close(tsCh)
select {
case <-time.After(time.Second * 10): // give goroutine some time to flush
@ -766,7 +711,6 @@ CREATE TABLE IF NOT EXISTS rtt(at_unix INT, region_id INT, hostname TEXT, af INT
cancel()
}
wg.Wait()
return
}
@ -787,20 +731,9 @@ CREATE TABLE IF NOT EXISTS rtt(at_unix INT, region_id INT, hostname TEXT, af INT
defer derpMapTicker.Stop()
probeTicker := time.NewTicker(*flagInterval)
defer probeTicker.Stop()
cleanupTicker := time.NewTicker(time.Hour)
defer cleanupTicker.Stop()
for {
select {
case <-cleanupTicker.C:
older := time.Now().Add(-*flagRetention)
log.Printf("cleaning up measurements older than %v", older)
_, err := db.Exec("DELETE FROM rtt WHERE at_unix < ?", older.Unix())
if err != nil {
log.Printf("error cleaning up old data: %v", err)
shutdown()
return
}
case <-probeTicker.C:
results, err := probeNodes(nodeMetaByAddr, stableConns, dstPorts)
if err != nil {
@ -819,32 +752,6 @@ CREATE TABLE IF NOT EXISTS rtt(at_unix INT, region_id INT, hostname TEXT, af INT
tsCh <- ts
}
}
tx, err := db.Begin()
if err != nil {
log.Printf("error beginning sqlite tx: %v", err)
shutdown()
return
}
for _, result := range results {
af := 4
if result.key.meta.addr.Is6() {
af = 6
}
_, err = tx.Exec("INSERT INTO rtt(at_unix, region_id, hostname, af, address, timestamp_source, stable_conn, dst_port, rtt_ns) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?)",
result.at.Unix(), result.key.meta.regionID, result.key.meta.hostname, af, result.key.meta.addr.String(), result.key.timestampSource, result.key.connStability, result.key.dstPort, result.rtt)
if err != nil {
tx.Rollback()
log.Printf("error adding result to tx: %v", err)
shutdown()
return
}
}
err = tx.Commit()
if err != nil {
log.Printf("error committing tx: %v", err)
shutdown()
return
}
case dm := <-dmCh:
staleMeta, err := nodeMetaFromDERPMap(dm, nodeMetaByAddr, *flagIPv6)
if err != nil {
@ -874,10 +781,6 @@ CREATE TABLE IF NOT EXISTS rtt(at_unix INT, region_id INT, hostname TEXT, af INT
dmCh <- updatedDM
}
}()
case err := <-httpErrCh:
log.Printf("http server error: %v", err)
shutdown()
return
case <-sigCh:
shutdown()
return

@ -1,26 +0,0 @@
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
//go:build !(windows && 386)
package main
import (
"database/sql"
_ "modernc.org/sqlite"
)
type db struct {
*sql.DB
}
func newDB(path string) (*db, error) {
d, err := sql.Open("sqlite", *flagOut)
if err != nil {
return nil, err
}
return &db{
DB: d,
}, nil
}

@ -1,17 +0,0 @@
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package main
import (
"database/sql"
"errors"
)
type db struct {
*sql.DB
}
func newDB(path string) (*db, error) {
return nil, errors.New("unsupported platform")
}

@ -5,7 +5,6 @@ go 1.22.0
require (
filippo.io/mkcert v1.4.4
fybrik.io/crdoc v0.6.3
github.com/Masterminds/squirrel v1.5.4
github.com/akutz/memconn v0.1.0
github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa
github.com/andybalholm/brotli v1.1.0
@ -113,7 +112,6 @@ require (
k8s.io/apimachinery v0.30.1
k8s.io/apiserver v0.30.1
k8s.io/client-go v0.30.1
modernc.org/sqlite v1.29.10
nhooyr.io/websocket v1.8.10
sigs.k8s.io/controller-runtime v0.18.4
sigs.k8s.io/controller-tools v0.15.1-0.20240618033008-7824932b0cab
@ -127,21 +125,10 @@ require (
github.com/cyphar/filepath-securejoin v0.2.4 // indirect
github.com/dave/astrid v0.0.0-20170323122508-8c2895878b14 // indirect
github.com/dave/brenda v1.1.0 // indirect
github.com/dustin/go-humanize v1.0.1 // indirect
github.com/gobuffalo/flect v1.0.2 // indirect
github.com/google/gnostic-models v0.6.9-0.20230804172637-c7be7c783f49 // indirect
github.com/google/pprof v0.0.0-20240409012703-83162a5b38cd // indirect
github.com/gorilla/securecookie v1.1.2 // indirect
github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
github.com/lann/builder v0.0.0-20180802200727-47ae307949d0 // indirect
github.com/lann/ps v0.0.0-20150810152359-62de8c46ede0 // indirect
github.com/ncruces/go-strftime v0.1.9 // indirect
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
modernc.org/gc/v3 v3.0.0-20240107210532-573471604cb6 // indirect
modernc.org/libc v1.49.3 // indirect
modernc.org/mathutil v1.6.0 // indirect
modernc.org/memory v1.8.0 // indirect
modernc.org/strutil v1.2.0 // indirect
modernc.org/token v1.1.0 // indirect
)
require (

@ -75,8 +75,6 @@ github.com/Masterminds/semver/v3 v3.2.1 h1:RN9w6+7QoMeJVGyfmbcgs28Br8cvmnucEXnY0
github.com/Masterminds/semver/v3 v3.2.1/go.mod h1:qvl/7zhW3nngYb5+80sSMF+FG2BjYrf8m9wsX0PNOMQ=
github.com/Masterminds/sprig/v3 v3.2.3 h1:eL2fZNezLomi0uOLqjQoN6BfsDD+fyLtgbJMAj9n6YA=
github.com/Masterminds/sprig/v3 v3.2.3/go.mod h1:rXcFaZ2zZbLRJv/xSysmlgIM1u11eBaRMhvYXJNkGuM=
github.com/Masterminds/squirrel v1.5.4 h1:uUcX/aBc8O7Fg9kaISIUsHXdKuqehiXAMQTYX8afzqM=
github.com/Masterminds/squirrel v1.5.4/go.mod h1:NNaOrjSoIDfDA40n7sr2tPNZRfjzjA400rg+riTZj10=
github.com/Microsoft/go-winio v0.5.2/go.mod h1:WpS1mjBmmwHBEWmogvA2mj8546UReBk4v8QkMxJ6pZY=
github.com/Microsoft/go-winio v0.6.1 h1:9/kr64B9VUZrLm5YYwbGtUJnMgqWVOdUAXu6Migciow=
github.com/Microsoft/go-winio v0.6.1/go.mod h1:LRdKpFKfdobln8UmuiYcKPot9D2v6svN5+sAH+4kjUM=
@ -265,8 +263,6 @@ github.com/docker/docker-credential-helpers v0.8.1 h1:j/eKUktUltBtMzKqmfLB0PAgqY
github.com/docker/docker-credential-helpers v0.8.1/go.mod h1:P3ci7E3lwkZg6XiHdRKft1KckHiO9a2rNtyFbZ/ry9M=
github.com/dsnet/try v0.0.3 h1:ptR59SsrcFUYbT/FhAbKTV6iLkeD6O18qfIWRml2fqI=
github.com/dsnet/try v0.0.3/go.mod h1:WBM8tRpUmnXXhY1U6/S8dt6UWdHTQ7y8A5YSkRCkq40=
github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
github.com/elazarl/goproxy v0.0.0-20230808193330-2592e75ae04a h1:mATvB/9r/3gvcejNsXKSkQ6lcIaNec2nyfOdlTBR2lU=
github.com/elazarl/goproxy v0.0.0-20230808193330-2592e75ae04a/go.mod h1:Ro8st/ElPeALwNFlcTpWmkr6IoMFfkjXAvTHpevnDsM=
github.com/emicklei/go-restful/v3 v3.11.2 h1:1onLa9DcsMYO9P+CXaL0dStDqQ2EHHXLiz+BtnqkLAU=
@ -522,8 +518,6 @@ github.com/hashicorp/go-version v1.6.0 h1:feTTfFNnjP967rlCxM/I9g701jU+RN74YKx2mO
github.com/hashicorp/go-version v1.6.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
github.com/hashicorp/golang-lru/v2 v2.0.7 h1:a+bsQ5rvGLjzHuww6tVxozPZFVghXaHOwFs4luLUK2k=
github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
github.com/hdevalence/ed25519consensus v0.2.0 h1:37ICyZqdyj0lAZ8P4D1d1id3HqbbG1N3iBb1Tb4rdcU=
@ -623,10 +617,6 @@ github.com/kunwardeep/paralleltest v1.0.6 h1:FCKYMF1OF2+RveWlABsdnmsvJrei5aoyZoa
github.com/kunwardeep/paralleltest v1.0.6/go.mod h1:Y0Y0XISdZM5IKm3TREQMZ6iteqn1YuwCsJO/0kL9Zes=
github.com/kyoh86/exportloopref v0.1.11 h1:1Z0bcmTypkL3Q4k+IDHMWTcnCliEZcaPiIe0/ymEyhQ=
github.com/kyoh86/exportloopref v0.1.11/go.mod h1:qkV4UF1zGl6EkF1ox8L5t9SwyeBAZ3qLMd6up458uqA=
github.com/lann/builder v0.0.0-20180802200727-47ae307949d0 h1:SOEGU9fKiNWd/HOJuq6+3iTQz8KNCLtVX6idSoTLdUw=
github.com/lann/builder v0.0.0-20180802200727-47ae307949d0/go.mod h1:dXGbAdH5GtBTC4WfIxhKZfyBF/HBFgRZSWwZ9g/He9o=
github.com/lann/ps v0.0.0-20150810152359-62de8c46ede0 h1:P6pPBnrTSX3DEVR4fDembhRWSsG5rVo6hYhAB/ADZrk=
github.com/lann/ps v0.0.0-20150810152359-62de8c46ede0/go.mod h1:vmVJ0l/dxyfGW6FmdpVm2joNMFikkuWg0EoCKLGUMNw=
github.com/ldez/gomoddirectives v0.2.3 h1:y7MBaisZVDYmKvt9/l1mjNCiSA1BVn34U0ObUcJwlhA=
github.com/ldez/gomoddirectives v0.2.3/go.mod h1:cpgBogWITnCfRq2qGoDkKMEVSaarhdBr6g8G04uz6d0=
github.com/ldez/tagliatelle v0.5.0 h1:epgfuYt9v0CG3fms0pEgIMNPuFf/LpPIfjk4kyqSioo=
@ -699,8 +689,6 @@ github.com/nakabonne/nestif v0.3.1 h1:wm28nZjhQY5HyYPx+weN3Q65k6ilSBxDb8v5S81B81
github.com/nakabonne/nestif v0.3.1/go.mod h1:9EtoZochLn5iUprVDmDjqGKPofoUEBL8U4Ngq6aY7OE=
github.com/nbutton23/zxcvbn-go v0.0.0-20210217022336-fa2cb2858354 h1:4kuARK6Y6FxaNu/BnU2OAaLF86eTVhP2hjTB6iMvItA=
github.com/nbutton23/zxcvbn-go v0.0.0-20210217022336-fa2cb2858354/go.mod h1:KSVJerMDfblTH7p5MZaTt+8zaT2iEk3AkVb9PQdZuE8=
github.com/ncruces/go-strftime v0.1.9 h1:bY0MQC28UADQmHmaF5dgpLmImcShSi2kHU9XLdhx/f4=
github.com/ncruces/go-strftime v0.1.9/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 h1:zYyBkD/k9seD2A7fsi6Oo2LfFZAehjjQMERAvZLEDnQ=
github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=
github.com/nishanths/exhaustive v0.10.0 h1:BMznKAcVa9WOoLq/kTGp4NJOJSMwEpcpjFNAVRfPlSo=
@ -791,8 +779,6 @@ github.com/quasilyte/regex/syntax v0.0.0-20210819130434-b3f0c404a727 h1:TCg2WBOl
github.com/quasilyte/regex/syntax v0.0.0-20210819130434-b3f0c404a727/go.mod h1:rlzQ04UMyJXu/aOvhd8qT+hvDrFpiwqp8MRXDY9szc0=
github.com/quasilyte/stdinfo v0.0.0-20220114132959-f7386bf02567 h1:M8mH9eK4OUR4lu7Gd+PU1fV2/qnDNfzT635KRSObncs=
github.com/quasilyte/stdinfo v0.0.0-20220114132959-f7386bf02567/go.mod h1:DWNGW8A4Y+GyBgPuaQJuWiy0XYftx4Xm/y5Jqk9I6VQ=
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
github.com/rivo/uniseg v0.4.4 h1:8TfxU8dW6PdqD27gjM8MVNuicgxIjxpm4K7x4jp8sis=
github.com/rivo/uniseg v0.4.4/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
@ -1475,32 +1461,6 @@ k8s.io/kube-openapi v0.0.0-20240228011516-70dd3763d340 h1:BZqlfIlq5YbRMFko6/PM7F
k8s.io/kube-openapi v0.0.0-20240228011516-70dd3763d340/go.mod h1:yD4MZYeKMBwQKVht279WycxKyM84kkAx2DPrTXaeb98=
k8s.io/utils v0.0.0-20240102154912-e7106e64919e h1:eQ/4ljkx21sObifjzXwlPKpdGLrCfRziVtos3ofG/sQ=
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