Merge pull request #1286 from ethereum-optimism/bwilson/op_exporter-k8s-api

Adding k8s api client to op_exporter

Merge pull request #1286 from ethereum-optimism/bwilson/op_exporter-k8s-api
Adding k8s api client to op_exporter
2f4c4846 · Mark Tyneway · GitHub · a8c9cd67 · 0572c242 · 2f4c4846
Commit 2f4c4846 authored Aug 05, 2021 by Mark Tyneway Committed by GitHub Aug 05, 2021
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go.mod go/op_exporter/go.mod +2 -0

go.sum go/op_exporter/go.sum +176 -0

main.go go/op_exporter/k8sClient/main.go +20 -0

main.go go/op_exporter/main.go +62 -10

No files found.
--- a/go/op_exporter/go.mod
+++ b/go/op_exporter/go.mod
@@ -8,4 +8,6 @@ require (
 	github.com/sirupsen/logrus v1.4.2
 	github.com/ybbus/jsonrpc v2.1.2+incompatible
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
+	k8s.io/apimachinery v0.21.2 // indirect
+	k8s.io/client-go v0.21.2
 )
--- a/go/op_exporter/go.sum
+++ b/go/op_exporter/go.sum
@@ -8,33 +8,50 @@ cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTj
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@@ -48,6 +65,7 @@ github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRF
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@@ -86,9 +104,11 @@ github.com/cloudflare/cloudflare-go v0.14.0/go.mod h1:EnwdgGMaFOruiPZRFSgn+TsQ3h
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@@ -154,20 +198,31 @@ github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
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@@ -177,6 +232,7 @@ github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpO
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@@ -194,6 +250,8 @@ github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfC
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@@ -203,6 +261,7 @@ github.com/jung-kurt/gofpdf v1.0.3-0.20190309125859-24315acbbda5/go.mod h1:7Id9E
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@@ -213,11 +272,16 @@ github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGi
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@@ -230,28 +294,40 @@ github.com/mattn/go-sqlite3 v1.11.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsO
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@@ -296,16 +372,21 @@ github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6Mwd
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@@ -317,10 +398,12 @@ github.com/willf/bitset v1.1.3/go.mod h1:RjeCKbqT1RxIR/KWY6phxZiaY1IyutSBfGjNPyS
 github.com/xlab/treeprint v0.0.0-20180616005107-d6fb6747feb6/go.mod h1:ce1O1j6UtZfjr22oyGxGLbauSBp2YVXpARAosm7dHBg=
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@@ -329,9 +412,12 @@ golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnf
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@@ -343,6 +429,9 @@ golang.org/x/exp v0.0.0-20190829153037-c13cbed26979/go.mod h1:86+5VVa7VpoJ4kLfm0
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@@ -354,11 +443,15 @@ golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHl
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@@ -376,16 +469,26 @@ golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR
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@@ -408,15 +511,23 @@ golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -427,15 +538,25 @@ golang.org/x/sys v0.0.0-20210316164454-77fc1eacc6aa/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -450,6 +571,7 @@ golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBn
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@@ -459,9 +581,20 @@ golang.org/x/tools v0.0.0-20191113191852-77e3bb0ad9e7/go.mod h1:b+2E5dAYhXwXZwtn
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@@ -480,10 +613,14 @@ google.golang.org/api v0.9.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEn
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@@ -499,25 +636,41 @@ google.golang.org/genproto v0.0.0-20191115194625-c23dd37a84c9/go.mod h1:n3cpQtvx
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+gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/inf.v0 v0.9.1 h1:73M5CoZyi3ZLMOyDlQh031Cx6N9NDJ2Vvfl76EDAgDc=
+gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
 gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce/go.mod h1:5AcXVHNjg+BDxry382+8OKon8SEWiKktQR07RKPsv1c=
 gopkg.in/olebedev/go-duktape.v3 v3.0.0-20200619000410-60c24ae608a6/go.mod h1:uAJfkITjFhyEEuUfm7bsmCZRbW5WRq8s9EY8HZ6hCns=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
@@ -529,6 +682,8 @@ gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
@@ -536,6 +691,27 @@ honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 honnef.co/go/tools v0.1.3/go.mod h1:NgwopIslSNH47DimFoV78dnkksY2EFtX0ajyb3K/las=
+k8s.io/api v0.21.2 h1:vz7DqmRsXTCSa6pNxXwQ1IYeAZgdIsua+DZU+o+SX3Y=
+k8s.io/api v0.21.2/go.mod h1:Lv6UGJZ1rlMI1qusN8ruAp9PUBFyBwpEHAdG24vIsiU=
+k8s.io/apimachinery v0.21.2 h1:vezUc/BHqWlQDnZ+XkrpXSmnANSLbpnlpwo0Lhk0gpc=
+k8s.io/apimachinery v0.21.2/go.mod h1:CdTY8fU/BlvAbJ2z/8kBwimGki5Zp8/fbVuLY8gJumM=
+k8s.io/client-go v0.21.2 h1:Q1j4L/iMN4pTw6Y4DWppBoUxgKO8LbffEMVEV00MUp0=
+k8s.io/client-go v0.21.2/go.mod h1:HdJ9iknWpbl3vMGtib6T2PyI/VYxiZfq936WNVHBRrA=
+k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
+k8s.io/klog/v2 v2.8.0 h1:Q3gmuM9hKEjefWFFYF0Mat+YyFJvsUyYuwyNNJ5C9Ts=
+k8s.io/klog/v2 v2.8.0/go.mod h1:hy9LJ/NvuK+iVyP4Ehqva4HxZG/oXyIS3n3Jmire4Ec=
+k8s.io/kube-openapi v0.0.0-20210305001622-591a79e4bda7/go.mod h1:wXW5VT87nVfh/iLV8FpR2uDvrFyomxbtb1KivDbvPTE=
+k8s.io/utils v0.0.0-20201110183641-67b214c5f920 h1:CbnUZsM497iRC5QMVkHwyl8s2tB3g7yaSHkYPkpgelw=
+k8s.io/utils v0.0.0-20201110183641-67b214c5f920/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
+sigs.k8s.io/structured-merge-diff/v4 v4.0.2/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
+sigs.k8s.io/structured-merge-diff/v4 v4.1.0 h1:C4r9BgJ98vrKnnVCjwCSXcWjWe0NKcUQkmzDXZXGwH8=
+sigs.k8s.io/structured-merge-diff/v4 v4.1.0/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
+sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q=
+sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=
--- a/go/op_exporter/k8sClient/main.go
+++ b/go/op_exporter/k8sClient/main.go
+package k8sClient
+
+import (
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/rest"
+)
+
+func Newk8sClient() (client *kubernetes.Clientset, err error) {
+	// creates the in-cluster config
+	config, err := rest.InClusterConfig()
+	if err != nil {
+		panic(err.Error())
+	}
+	// creates the clientset
+	client, err = kubernetes.NewForConfig(config)
+	if err != nil {
+		panic(err.Error())
+	}
+	return client, nil
+}
--- a/go/op_exporter/main.go
+++ b/go/op_exporter/main.go
 package main

 import (
+	"context"
 	"fmt"
+	"io/ioutil"
 	"net/http"
 	"os"
 	"sync"
 	"time"

+	"github.com/ethereum-optimism/optimism/go/op_exporter/k8sClient"
 	"github.com/ethereum-optimism/optimism/go/op_exporter/version"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	log "github.com/sirupsen/logrus"
 	"github.com/ybbus/jsonrpc"
 	"gopkg.in/alecthomas/kingpin.v2"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/kubernetes"
 )

 var (
@@ -36,21 +41,26 @@ var (
 		"wait.minutes",
 		"Number of minutes to wait for the next block before marking provider unhealthy.",
 	).Default("10").Int()
-	//unhealthyTimePeriod = time.Minute * 10
+	enableK8sQuery = kingpin.Flag(
+		"k8s.enable",
+		"Enable kubernetes info lookup.",
+	).Default("true").Bool()
 )

 type healthCheck struct {
-	mu         *sync.RWMutex
-	height     uint64
-	healthy    bool
-	updateTime time.Time
+	mu             *sync.RWMutex
+	height         uint64
+	healthy        bool
+	updateTime     time.Time
+	allowedMethods []string
+	version        *string
 }

 func healthHandler(health *healthCheck) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		health.mu.RLock()
 		defer health.mu.RUnlock()
-		w.Write([]byte(fmt.Sprintf(`{ "healthy": "%t" }`, health.healthy)))
+		w.Write([]byte(fmt.Sprintf(`{ "healthy": "%t", "version": "%s" }`, health.healthy, *health.version)))
 	}
 }

@@ -67,10 +77,12 @@ func main() {
 	log.Infoln("Build context", version.BuildContext())

 	health := healthCheck{
-		mu:         new(sync.RWMutex),
-		height:     0,
-		healthy:    false,
-		updateTime: time.Now(),
+		mu:             new(sync.RWMutex),
+		height:         0,
+		healthy:        false,
+		updateTime:     time.Now(),
+		allowedMethods: nil,
+		version:        nil,
 	}
 	http.Handle("/metrics", promhttp.Handler())
 	http.Handle("/health", healthHandler(&health))
@@ -86,6 +98,13 @@ func main() {
 	})
 	go getRollupGasPrices()
 	go getBlockNumber(&health)
+	if *enableK8sQuery {
+		client, err := k8sClient.Newk8sClient()
+		if err != nil {
+			log.Fatal(err)
+		}
+		go getSequencerVersion(&health, client)
+	}
 	log.Infoln("Listening on", *listenAddress)
 	if err := http.ListenAndServe(*listenAddress, nil); err != nil {
 		log.Fatal(err)
@@ -93,6 +112,39 @@ func main() {

 }

+func getSequencerVersion(health *healthCheck, client *kubernetes.Clientset) {
+	ns, err := ioutil.ReadFile("/var/run/secrets/kubernetes.io/serviceaccount/namespace")
+	if err != nil {
+		log.Fatalf("Unable to read namespace file: %s", err)
+	}
+	ticker := time.NewTicker(30 * time.Second)
+	for {
+		<-ticker.C
+		getOpts := metav1.GetOptions{
+			TypeMeta:        metav1.TypeMeta{},
+			ResourceVersion: "",
+		}
+		sequencerStatefulSet, err := client.AppsV1().StatefulSets(string(ns)).Get(context.TODO(), "sequencer", getOpts)
+		if err != nil {
+			unknownStatus := "UNKNOWN"
+			health.version = &unknownStatus
+			log.Errorf("Unable to retrieve a sequencer StatefulSet: %s", err)
+			continue
+		}
+		for _, c := range sequencerStatefulSet.Spec.Template.Spec.Containers {
+			log.Infof("Checking container %s", c.Name)
+			switch {
+			case c.Name == "sequencer":
+				log.Infof("The sequencer version is: %s", c.Image)
+				health.version = &c.Image
+			default:
+				log.Infof("Unable to find the sequencer container in the statefulset?!?")
+			}
+		}
+
+	}
+}
+
 func getBlockNumber(health *healthCheck) {
 	rpcClient := jsonrpc.NewClientWithOpts(*rpcProvider, &jsonrpc.RPCClientOpts{})
 	var blockNumberResponse *string