Capture the unique identifier everywhere its needed. (#51)

* Capture the unique identifier everywhere its needed.

* Handle graceful shutdown for historical processing

* Update flags and minor shutdown updates

* Update checkout statement for historic

* update cicd pipeline

* Add secret

* Use deploy-key instead of personal PAT

* update variables

.github/workflows/on-pr.yml

@@ -22,189 +22,15 @@ on:
       - "!LICENSE"
       - "!.github/workflows/**"
       - ".github/workflows/on-pr.yml"
+      - ".github/workflows/tests.yml"
       - "**"
 
-env:
-  stack-orchestrator-ref: ${{ github.event.inputs.stack-orchestrator-ref  || 'main'}}
-  ipld-ethcl-db-ref: ${{ github.event.inputs.ipld-ethcl-db-ref  || 'feature/historic-processing' }}
-  ssz-data-ref: ${{ github.event.inputs.ssz-data-ref  || 'main' }}
-  GOPATH: /tmp/go
 jobs:
-  build:
+  trigger-tests:
-    name: Run Docker Build
+    uses: ./.github/workflows/tests.yml
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
     with:
-          path: "./ipld-ethcl-indexer"
+      stack-orchestrator-ref: ${{ github.event.inputs.stack-orchestrator-ref }}
-
+      ipld-ethcl-db-ref: ${{ github.event.inputs.ipld-ethcl-db-ref }}
-      - uses: actions/checkout@v3
+      ssz-data-ref: ${{ github.event.inputs.ssz-data-ref }}
-        with:
+    secrets:
-          ref: ${{ env.stack-orchestrator-ref }}
+      GHA_KEY: ${{secrets.GHA_KEY}}
-          path: "./stack-orchestrator/"
-          repository: vulcanize/stack-orchestrator
-          fetch-depth: 0
-
-      - uses: actions/checkout@v3
-        with:
-          ref: ${{ env.ipld-ethcl-db-ref }}
-          repository: vulcanize/ipld-ethcl-db
-          path: "./ipld-ethcl-db/"
-          token: ${{ secrets.GH_PAT }}
-          fetch-depth: 0
-
-      - name: Create config file
-        run: |
-          echo vulcanize_ipld_ethcl_db=$GITHUB_WORKSPACE/ipld-ethcl-db/ > ./config.sh
-          echo vulcanize_ipld_ethcl_indexer=$GITHUB_WORKSPACE/ipld-ethcl-indexer >> ./config.sh
-          echo ethcl_capture_mode=boot >> ./config.sh
-          echo ethcl_skip_sync=true >> ./config.sh
-          echo ethcl_known_gap_increment=1000000 >> ./config.sh
-          cat ./config.sh
-
-      - name: Run docker compose
-        run: |
-          docker-compose  \
-          -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/local/docker-compose-ethcl-db.yml" \
-          -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/latest/docker-compose-lighthouse.yml" \
-          -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/local/docker-compose-ipld-ethcl-indexer.yml" \
-          --env-file ./config.sh \
-          up -d --build
-
-      - name: Check to make sure HEALTH file is present
-        shell: bash
-        run: |
-          until $(docker compose -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/local/docker-compose-ipld-ethcl-indexer.yml" cp ipld-ethcl-indexer:/root/HEALTH ./HEALTH) ; do sleep 10; done
-          cat ./HEALTH
-          if [[ "$(cat ./HEALTH)" -eq "0" ]]; then echo "Application boot successful" && (exit 0); else docker compose -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/local/docker-compose-ipld-ethcl-indexer.yml" cp ipld-ethcl-indexer:/root/ipld-ethcl-indexer.log . && cat ipld-ethcl-indexer.log && (exit 1); fi
-
-  unit-test:
-    name: Run Unit Tests
-    runs-on: ubuntu-latest
-    ## IF you want to update the default branch for `pull_request runs, do it after the ||`
-    steps:
-      - name: Create GOPATH
-        run: mkdir -p /tmp/go
-
-      - uses: actions/checkout@v2
-        with:
-          path: "./ipld-ethcl-indexer"
-
-      - uses: actions/checkout@v3
-        with:
-          ref: ${{ env.stack-orchestrator-ref }}
-          path: "./stack-orchestrator/"
-          repository: vulcanize/stack-orchestrator
-          fetch-depth: 0
-
-      - uses: actions/checkout@v3
-        with:
-          ref: ${{ env.ipld-ethcl-db-ref }}
-          repository: vulcanize/ipld-ethcl-db
-          path: "./ipld-ethcl-db/"
-          token: ${{ secrets.GH_PAT }}
-          fetch-depth: 0
-
-      - uses: actions/checkout@v3
-        with:
-          ref: ${{ env.ssz-data-ref }}
-          repository: vulcanize/ssz-data
-          path: "./ipld-ethcl-indexer/pkg/beaconclient/ssz-data"
-          fetch-depth: 0
-
-      - name: Create config file
-        run: |
-          echo vulcanize_ipld_ethcl_db=$GITHUB_WORKSPACE/ipld-ethcl-db/ > ./config.sh
-          echo vulcanize_ipld_ethcl_indexer=$GITHUB_WORKSPACE/ipld-ethcl-indexer >> ./config.sh
-          cat ./config.sh
-
-      - name: Run docker compose
-        run: |
-          docker-compose  \
-          -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/local/docker-compose-ethcl-db.yml" \
-          --env-file ./config.sh \
-          up -d --build
-
-      - uses: actions/setup-go@v3
-        with:
-          go-version: ">=1.17.0"
-          check-latest: true
-
-      - name: Install packages
-        run: |
-          go install github.com/onsi/ginkgo/v2/ginkgo@latest
-          which ginkgo
-
-      - name: Run the tests using Make
-        run: |
-          cd ipld-ethcl-indexer
-          make unit-test-ci
-
-  integration-test:
-    name: Run Integration Tests
-    runs-on: ubuntu-latest
-    steps:
-      - name: Create GOPATH
-        run: mkdir -p /tmp/go
-
-      - uses: actions/checkout@v2
-        with:
-          path: "./ipld-ethcl-indexer"
-
-      - uses: actions/checkout@v3
-        with:
-          ref: ${{ env.stack-orchestrator-ref }}
-          path: "./stack-orchestrator/"
-          repository: vulcanize/stack-orchestrator
-          fetch-depth: 0
-
-      - uses: actions/checkout@v3
-        with:
-          ref: ${{ env.ipld-ethcl-db-ref }}
-          repository: vulcanize/ipld-ethcl-db
-          path: "./ipld-ethcl-db/"
-          token: ${{ secrets.GH_PAT }}
-          fetch-depth: 0
-
-      - name: Create config file
-        run: |
-          echo vulcanize_ipld_ethcl_db=$GITHUB_WORKSPACE/ipld-ethcl-db/ > ./config.sh
-          echo vulcanize_ipld_ethcl_indexer=$GITHUB_WORKSPACE/ipld-ethcl-indexer >> ./config.sh
-          echo ethcl_capture_mode=boot >> ./config.sh
-          cat ./config.sh
-
-      - name: Run docker compose
-        run: |
-          docker-compose  \
-          -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/local/docker-compose-ethcl-db.yml" \
-          -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/latest/docker-compose-lighthouse.yml" \
-          --env-file ./config.sh \
-          up -d --build
-
-      - uses: actions/setup-go@v3
-        with:
-          go-version: ">=1.17.0"
-          check-latest: true
-
-      - name: Install packages
-        run: |
-          go install github.com/onsi/ginkgo/v2/ginkgo@latest
-          which ginkgo
-
-      - name: Run the tests using Make
-        run: |
-          cd ipld-ethcl-indexer
-          make integration-test-ci
-
-  golangci:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/setup-go@v3
-        with:
-          go-version: ">=1.17.0"
-      - uses: actions/checkout@v3
-      - name: golangci-lint
-        uses: golangci/golangci-lint-action@v3
-        with:
-          args: --timeout 90s --disable deadcode,unused
-#          args: --timeout 90s --disable deadcode,

.github/workflows/on-publish.yml

@@ -3,9 +3,18 @@ on:
   release:
     types: [published, edited]
 jobs:
+  trigger-tests:
+    uses: ./.github/workflows/tests.yml
+    with:
+      stack-orchestrator-ref: ${{ github.event.inputs.stack-orchestrator-ref }}
+      ipld-ethcl-db-ref: ${{ github.event.inputs.ipld-ethcl-db-ref }}
+      ssz-data-ref: ${{ github.event.inputs.ssz-data-ref }}
+    secrets:
+      GHA_KEY: ${{secrets.GHA_KEY}}
   build:
     name: Run docker build
     runs-on: ubuntu-latest
+    needs: trigger-tests
     steps:
       - uses: actions/checkout@v2
       - name: Get the version

.github/workflows/tests.yml

@@ -0,0 +1,201 @@
+name: Test the stack.
+on:
+  workflow_call:
+    inputs:
+      stack-orchestrator-ref:
+        required: false
+        type: string
+      ipld-ethcl-db-ref:
+        required: false
+        type: string
+      ssz-data-ref:
+        required: false
+        type: string
+    secrets:
+      GHA_KEY:
+        required: true
+
+env:
+  stack-orchestrator-ref: ${{ inputs.stack-orchestrator-ref || 'develop' }}
+  ipld-ethcl-db-ref: ${{ inputs.ipld-ethcl-db-ref  || 'feature/historic-processing' }}
+  ssz-data-ref: ${{ inputs.ssz-data-ref || 'main' }}
+  GOPATH: /tmp/go
+jobs:
+  build:
+    name: Run Docker Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          path: "./ipld-ethcl-indexer"
+
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ env.stack-orchestrator-ref }}
+          path: "./stack-orchestrator/"
+          repository: vulcanize/stack-orchestrator
+          fetch-depth: 0
+
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ env.ipld-ethcl-db-ref }}
+          repository: vulcanize/ipld-ethcl-db
+          path: "./ipld-ethcl-db/"
+          ssh-key: ${{secrets.GHA_KEY}}
+          fetch-depth: 0
+
+      - name: Create config file
+        run: |
+          echo vulcanize_ipld_ethcl_db=$GITHUB_WORKSPACE/ipld-ethcl-db/ > ./config.sh
+          echo vulcanize_ipld_ethcl_indexer=$GITHUB_WORKSPACE/ipld-ethcl-indexer >> ./config.sh
+          echo ethcl_capture_mode=boot >> ./config.sh
+          echo ethcl_skip_sync=true >> ./config.sh
+          echo ethcl_known_gap_increment=1000000 >> ./config.sh
+          cat ./config.sh
+
+      - name: Run docker compose
+        run: |
+          docker-compose  \
+          -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/local/docker-compose-ethcl-db.yml" \
+          -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/latest/docker-compose-lighthouse.yml" \
+          -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/local/docker-compose-ipld-ethcl-indexer.yml" \
+          --env-file ./config.sh \
+          up -d --build
+
+      - name: Check to make sure HEALTH file is present
+        shell: bash
+        run: |
+          until $(docker compose -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/local/docker-compose-ipld-ethcl-indexer.yml" cp ipld-ethcl-indexer:/root/HEALTH ./HEALTH) ; do sleep 10; done
+          cat ./HEALTH
+          if [[ "$(cat ./HEALTH)" -eq "0" ]]; then echo "Application boot successful" && (exit 0); else docker compose -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/local/docker-compose-ipld-ethcl-indexer.yml" cp ipld-ethcl-indexer:/root/ipld-ethcl-indexer.log . && cat ipld-ethcl-indexer.log && (exit 1); fi
+
+  unit-test:
+    name: Run Unit Tests
+    runs-on: ubuntu-latest
+    ## IF you want to update the default branch for `pull_request runs, do it after the ||`
+    steps:
+      - name: Create GOPATH
+        run: mkdir -p /tmp/go
+
+      - uses: actions/checkout@v2
+        with:
+          path: "./ipld-ethcl-indexer"
+
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ env.stack-orchestrator-ref }}
+          path: "./stack-orchestrator/"
+          repository: vulcanize/stack-orchestrator
+          fetch-depth: 0
+
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ env.ipld-ethcl-db-ref }}
+          repository: vulcanize/ipld-ethcl-db
+          path: "./ipld-ethcl-db/"
+          ssh-key: ${{ secrets.GHA_KEY }}
+          fetch-depth: 0
+
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ env.ssz-data-ref }}
+          repository: vulcanize/ssz-data
+          path: "./ipld-ethcl-indexer/pkg/beaconclient/ssz-data"
+          fetch-depth: 0
+
+      - name: Create config file
+        run: |
+          echo vulcanize_ipld_ethcl_db=$GITHUB_WORKSPACE/ipld-ethcl-db/ > ./config.sh
+          echo vulcanize_ipld_ethcl_indexer=$GITHUB_WORKSPACE/ipld-ethcl-indexer >> ./config.sh
+          cat ./config.sh
+
+      - name: Run docker compose
+        run: |
+          docker-compose  \
+          -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/local/docker-compose-ethcl-db.yml" \
+          --env-file ./config.sh \
+          up -d --build
+
+      - uses: actions/setup-go@v3
+        with:
+          go-version: ">=1.17.0"
+          check-latest: true
+
+      - name: Install packages
+        run: |
+          go install github.com/onsi/ginkgo/v2/ginkgo@latest
+          which ginkgo
+
+      - name: Run the tests using Make
+        run: |
+          cd ipld-ethcl-indexer
+          make unit-test-ci
+
+  integration-test:
+    name: Run Integration Tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Create GOPATH
+        run: mkdir -p /tmp/go
+
+      - uses: actions/checkout@v2
+        with:
+          path: "./ipld-ethcl-indexer"
+
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ env.stack-orchestrator-ref }}
+          path: "./stack-orchestrator/"
+          repository: vulcanize/stack-orchestrator
+          fetch-depth: 0
+
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ env.ipld-ethcl-db-ref }}
+          repository: vulcanize/ipld-ethcl-db
+          path: "./ipld-ethcl-db/"
+          ssh-key: ${{secrets.GHA_KEY}}
+          fetch-depth: 0
+
+      - name: Create config file
+        run: |
+          echo vulcanize_ipld_ethcl_db=$GITHUB_WORKSPACE/ipld-ethcl-db/ > ./config.sh
+          echo vulcanize_ipld_ethcl_indexer=$GITHUB_WORKSPACE/ipld-ethcl-indexer >> ./config.sh
+          echo ethcl_capture_mode=boot >> ./config.sh
+          cat ./config.sh
+
+      - name: Run docker compose
+        run: |
+          docker-compose  \
+          -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/local/docker-compose-ethcl-db.yml" \
+          -f "$GITHUB_WORKSPACE/stack-orchestrator/docker/latest/docker-compose-lighthouse.yml" \
+          --env-file ./config.sh \
+          up -d --build
+
+      - uses: actions/setup-go@v3
+        with:
+          go-version: ">=1.17.0"
+          check-latest: true
+
+      - name: Install packages
+        run: |
+          go install github.com/onsi/ginkgo/v2/ginkgo@latest
+          which ginkgo
+
+      - name: Run the tests using Make
+        run: |
+          cd ipld-ethcl-indexer
+          make integration-test-ci
+
+  golangci:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-go@v3
+        with:
+          go-version: ">=1.17.0"
+      - uses: actions/checkout@v3
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          args: --timeout 90s --disable deadcode,unused
+#          args: --timeout 90s --disable deadcode,

cmd/boot.go

@@ -23,6 +23,7 @@ import (
 
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
 	"github.com/vulcanize/ipld-ethcl-indexer/internal/boot"
 	"github.com/vulcanize/ipld-ethcl-indexer/internal/shutdown"
 	"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
@@ -44,10 +45,11 @@ func bootApp() {
 	log.Info("Starting the application in boot mode.")
 	ctx := context.Background()
 
-	BC, DB, err := boot.BootApplicationWithRetry(ctx, dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver,
+	Bc, Db, err := boot.BootApplicationWithRetry(ctx, viper.GetString("db.address"), viper.GetInt("db.port"), viper.GetString("db.name"), viper.GetString("db.username"), viper.GetString("db.password"), viper.GetString("db.driver"),
-		bcAddress, bcPort, bcConnectionProtocol, bcType, bcBootRetryInterval, bcBootMaxRetry, kgTableIncrement, "head", testDisregardSync)
+		viper.GetString("bc.address"), viper.GetInt("bc.port"), viper.GetString("bc.connectionProtocol"), viper.GetString("bc.type"), viper.GetInt("bc.bootRetryInterval"), viper.GetInt("bc.bootMaxRetry"),
+		viper.GetInt("kg.increment"), "boot", viper.GetBool("t.skipSync"), viper.GetInt("bc.uniqueNodeIdentifier"))
 	if err != nil {
-		loghelper.LogError(err).Error("Unable to Start application")
+		StopApplicationPreBoot(err, Db)
 	}
 
 	log.Info("Boot complete, we are going to shutdown.")
@@ -58,7 +60,7 @@ func bootApp() {
 		notifierCh <- syscall.SIGTERM
 	}()
 
-	err = shutdown.ShutdownServices(ctx, notifierCh, maxWaitSecondsShutdown, DB, BC)
+	err = shutdown.ShutdownBoot(ctx, notifierCh, maxWaitSecondsShutdown, Db, Bc)
 	if err != nil {
 		loghelper.LogError(err).Error("Ungracefully Shutdown ipld-ethcl-indexer!")
 	} else {

cmd/capture.go

@@ -39,6 +39,7 @@ var (
 	bcConnectionProtocol       string
 	bcType                     string
 	bcMaxHistoricProcessWorker int
+	bcUniqueNodeIdentifier     int
 	kgMaxWorker                int
 	kgTableIncrement           int
 	kgProcessGaps              bool
@@ -93,6 +94,7 @@ func init() {
 	captureCmd.PersistentFlags().IntVarP(&bcBootRetryInterval, "bc.bootRetryInterval", "", 30, "The amount of time to wait between retries while booting the application")
 	captureCmd.PersistentFlags().IntVarP(&bcBootMaxRetry, "bc.bootMaxRetry", "", 5, "The amount of time to wait between retries while booting the application")
 	captureCmd.PersistentFlags().IntVarP(&bcMaxHistoricProcessWorker, "bc.maxHistoricProcessWorker", "", 30, "The number of workers that should be actively processing slots from the ethcl.historic_process table. Be careful of system memory.")
+	captureCmd.PersistentFlags().IntVarP(&bcUniqueNodeIdentifier, "bc.uniqueNodeIdentifier", "", 0, "The unique identifier of this application. Each application connecting to the DB should have a unique identifier.")
 	// err = captureCmd.MarkPersistentFlagRequired("bc.address")
 	// exitErr(err)
 	// err = captureCmd.MarkPersistentFlagRequired("bc.port")
@@ -123,6 +125,8 @@ func init() {
 	exitErr(err)
 	err = viper.BindPFlag("db.name", captureCmd.PersistentFlags().Lookup("db.name"))
 	exitErr(err)
+	err = viper.BindPFlag("db.driver", captureCmd.PersistentFlags().Lookup("db.driver"))
+	exitErr(err)
 
 	//// Testing Specific
 	err = viper.BindPFlag("t.skipSync", captureCmd.PersistentFlags().Lookup("t.skipSync"))
@@ -143,6 +147,8 @@ func init() {
 	exitErr(err)
 	err = viper.BindPFlag("bc.maxHistoricProcessWorker", captureCmd.PersistentFlags().Lookup("bc.maxHistoricProcessWorker"))
 	exitErr(err)
+	err = viper.BindPFlag("bc.uniqueNodeIdentifier", captureCmd.PersistentFlags().Lookup("bc.uniqueNodeIdentifier"))
+	exitErr(err)
 	// Here you will define your flags and configuration settings.
 
 	//// Known Gap Specific

cmd/head.go

@@ -50,7 +50,7 @@ func startHeadTracking() {
 
 	Bc, Db, err := boot.BootApplicationWithRetry(ctx, viper.GetString("db.address"), viper.GetInt("db.port"), viper.GetString("db.name"), viper.GetString("db.username"), viper.GetString("db.password"), viper.GetString("db.driver"),
 		viper.GetString("bc.address"), viper.GetInt("bc.port"), viper.GetString("bc.connectionProtocol"), viper.GetString("bc.type"), viper.GetInt("bc.bootRetryInterval"), viper.GetInt("bc.bootMaxRetry"),
-		viper.GetInt("kg.increment"), "head", viper.GetBool("t.skipSync"))
+		viper.GetInt("kg.increment"), "head", viper.GetBool("t.skipSync"), viper.GetInt("bc.uniqueNodeIdentifier"))
 	if err != nil {
 		StopApplicationPreBoot(err, Db)
 	}
@@ -81,7 +81,7 @@ func startHeadTracking() {
 	}
 
 	// Shutdown when the time is right.
-	err = shutdown.ShutdownServices(ctx, notifierCh, maxWaitSecondsShutdown, Db, Bc)
+	err = shutdown.ShutdownHeadTracking(ctx, notifierCh, maxWaitSecondsShutdown, Db, Bc)
 	if err != nil {
 		loghelper.LogError(err).Error("Ungracefully Shutdown ipld-ethcl-indexer!")
 	} else {
@@ -94,6 +94,7 @@ func init() {
 	captureCmd.AddCommand(headCmd)
 }
 
+// Start prometheus server
 func serveProm(addr string) {
 	mux := http.NewServeMux()
 	mux.Handle("/metrics", promhttp.Handler())

cmd/historic.go

@@ -50,7 +50,7 @@ func startHistoricProcessing() {
 
 	Bc, Db, err := boot.BootApplicationWithRetry(ctx, viper.GetString("db.address"), viper.GetInt("db.port"), viper.GetString("db.name"), viper.GetString("db.username"), viper.GetString("db.password"), viper.GetString("db.driver"),
 		viper.GetString("bc.address"), viper.GetInt("bc.port"), viper.GetString("bc.connectionProtocol"), viper.GetString("bc.type"), viper.GetInt("bc.bootRetryInterval"), viper.GetInt("bc.bootMaxRetry"),
-		viper.GetInt("kg.increment"), "head", viper.GetBool("t.skipSync"))
+		viper.GetInt("kg.increment"), "historic", viper.GetBool("t.skipSync"), viper.GetInt("bc.uniqueNodeIdentifier"))
 	if err != nil {
 		StopApplicationPreBoot(err, Db)
 	}
@@ -91,7 +91,7 @@ func startHistoricProcessing() {
 	}
 
 	// Shutdown when the time is right.
-	err = shutdown.ShutdownServices(ctx, notifierCh, maxWaitSecondsShutdown, Db, Bc)
+	err = shutdown.ShutdownHistoricProcessing(ctx, notifierCh, maxWaitSecondsShutdown, Db, Bc)
 	if err != nil {
 		loghelper.LogError(err).Error("Ungracefully Shutdown ipld-ethcl-indexer!")
 	} else {

example.ipld-ethcl-indexer-config.json

@@ -14,7 +14,8 @@
     "bootRetryInterval": 30,
     "bootMaxRetry": 5,
     "maxHistoricProcessWorker": 2,
-    "connectionProtocol": "http"
+    "connectionProtocol": "http",
+    "uniqueNodeIdentifier": 100
   },
   "t": {
     "skipSync": true

go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/multiformats/go-multihash v0.1.0
 	github.com/onsi/ginkgo/v2 v2.1.4
 	github.com/onsi/gomega v1.19.0
+	github.com/prometheus/client_golang v1.12.1
 	github.com/r3labs/sse v0.0.0-20210224172625-26fe804710bc
 	github.com/sirupsen/logrus v1.8.1
 )
@@ -57,7 +58,6 @@ require (
 	github.com/multiformats/go-varint v0.0.6 // indirect
 	github.com/opentracing/opentracing-go v1.2.0 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/prometheus/client_golang v1.12.1 // indirect
 	github.com/prometheus/client_model v0.2.0 // indirect
 	github.com/prometheus/common v0.32.1 // indirect
 	github.com/prometheus/procfs v0.7.3 // indirect

internal/boot/boot.go

@@ -42,14 +42,17 @@ var (
 //
 // 3. Make sure the node is synced, unless disregardSync is true.
 func BootApplication(ctx context.Context, dbHostname string, dbPort int, dbName string, dbUsername string, dbPassword string, driverName string,
-	bcAddress string, bcPort int, bcConnectionProtocol string, bcKgTableIncrement int, disregardSync bool) (*beaconclient.BeaconClient, sql.Database, error) {
+	bcAddress string, bcPort int, bcConnectionProtocol string, bcKgTableIncrement int, disregardSync bool, uniqueNodeIdentifier int) (*beaconclient.BeaconClient, sql.Database, error) {
 	log.Info("Booting the Application")
 
 	log.Debug("Creating the Beacon Client")
-	BC = beaconclient.CreateBeaconClient(ctx, bcConnectionProtocol, bcAddress, bcPort, bcKgTableIncrement)
+	Bc, err := beaconclient.CreateBeaconClient(ctx, bcConnectionProtocol, bcAddress, bcPort, bcKgTableIncrement, uniqueNodeIdentifier)
+	if err != nil {
+		return Bc, nil, err
+	}
 
 	log.Debug("Checking Beacon Client")
-	err := BC.CheckBeaconClient()
+	err = Bc.CheckBeaconClient()
 	if err != nil {
 		return nil, nil, err
 	}
@@ -60,36 +63,37 @@ func BootApplication(ctx context.Context, dbHostname string, dbPort int, dbName
 		return nil, nil, err
 	}
 
-	BC.Db = DB
+	Bc.Db = DB
 
 	var status bool
 	if !disregardSync {
-		status, err = BC.CheckHeadSync()
+		status, err = Bc.CheckHeadSync()
 		if err != nil {
 			log.Error("Unable to get the nodes sync status")
-			return BC, DB, err
+			return Bc, DB, err
 		}
 		if status {
 			log.Error("The node is still syncing..")
 			err = fmt.Errorf("The node is still syncing.")
-			return BC, DB, err
+			return Bc, DB, err
 		}
 	} else {
 		log.Warn("We are not checking to see if the node has synced to head.")
 	}
-	return BC, DB, nil
+	return Bc, DB, nil
 }
 
 // Add retry logic to ensure that we are give the Beacon Client and the DB time to start.
 func BootApplicationWithRetry(ctx context.Context, dbHostname string, dbPort int, dbName string, dbUsername string, dbPassword string, driverName string,
-	bcAddress string, bcPort int, bcConnectionProtocol string, bcType string, bcRetryInterval int, bcMaxRetry int, bcKgTableIncrement int, startUpMode string, disregardSync bool) (*beaconclient.BeaconClient, sql.Database, error) {
+	bcAddress string, bcPort int, bcConnectionProtocol string, bcType string, bcRetryInterval int, bcMaxRetry int, bcKgTableIncrement int,
+	startUpMode string, disregardSync bool, uniqueNodeIdentifier int) (*beaconclient.BeaconClient, sql.Database, error) {
 	var err error
 
 	if bcMaxRetry < 0 {
 		i := 0
 		for {
 			BC, DB, err = BootApplication(ctx, dbHostname, dbPort, dbName, dbUsername, dbPassword, driverName,
-				bcAddress, bcPort, bcConnectionProtocol, bcKgTableIncrement, disregardSync)
+				bcAddress, bcPort, bcConnectionProtocol, bcKgTableIncrement, disregardSync, uniqueNodeIdentifier)
 			if err != nil {
 				log.WithFields(log.Fields{
 					"retryNumber": i,
@@ -104,7 +108,7 @@ func BootApplicationWithRetry(ctx context.Context, dbHostname string, dbPort int
 	} else {
 		for i := 0; i < bcMaxRetry; i++ {
 			BC, DB, err = BootApplication(ctx, dbHostname, dbPort, dbName, dbUsername, dbPassword, driverName,
-				bcAddress, bcPort, bcConnectionProtocol, bcKgTableIncrement, disregardSync)
+				bcAddress, bcPort, bcConnectionProtocol, bcKgTableIncrement, disregardSync, uniqueNodeIdentifier)
 			if err != nil {
 				log.WithFields(log.Fields{
 					"retryNumber": i,
@@ -136,6 +140,8 @@ func BootApplicationWithRetry(ctx context.Context, dbHostname string, dbPort int
 		}
 		BC.UpdateLatestSlotInBeaconServer(int64(headSlot))
 		// Add another switch case for bcType if its ever needed.
+	case "boot":
+		log.Debug("Running application in boot mode.")
 	default:
 		log.WithFields(log.Fields{
 			"startUpMode": startUpMode,

internal/boot/boot_test.go

@@ -38,44 +38,52 @@ var _ = Describe("Boot", func() {
 		bcBootRetryInterval  int    = 1
 		bcBootMaxRetry       int    = 5
 		bcKgTableIncrement   int    = 10
+		bcUniqueIdentifier   int    = 100
 	)
 	Describe("Booting the application", Label("integration"), func() {
 		Context("When the DB and BC are both up and running, we skip checking for a synced head, and we are processing head", func() {
 			It("Should connect successfully", func() {
-				_, db, err := boot.BootApplicationWithRetry(context.Background(), dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort, bcConnectionProtocol, bcType, bcBootRetryInterval, bcBootMaxRetry, bcKgTableIncrement, "head", true)
+				_, db, err := boot.BootApplicationWithRetry(context.Background(), dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort, bcConnectionProtocol, bcType, bcBootRetryInterval, bcBootMaxRetry, bcKgTableIncrement, "head", true, bcUniqueIdentifier)
 				defer db.Close()
 				Expect(err).ToNot(HaveOccurred())
 			})
 		})
 		Context("When the DB and BC are both up and running, we skip checking for a synced head, and we are processing historic ", func() {
 			It("Should connect successfully", func() {
-				_, db, err := boot.BootApplicationWithRetry(context.Background(), dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort, bcConnectionProtocol, bcType, bcBootRetryInterval, bcBootMaxRetry, bcKgTableIncrement, "historic", true)
+				_, db, err := boot.BootApplicationWithRetry(context.Background(), dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort, bcConnectionProtocol, bcType, bcBootRetryInterval, bcBootMaxRetry, bcKgTableIncrement, "historic", true, bcUniqueIdentifier)
 				defer db.Close()
 				Expect(err).ToNot(HaveOccurred())
 			})
 		})
 		Context("When the DB and BC are both up and running, and we check for a synced head", func() {
 			It("Should not connect successfully", func() {
-				_, db, err := boot.BootApplicationWithRetry(context.Background(), dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort, bcConnectionProtocol, bcType, bcBootRetryInterval, bcBootMaxRetry, bcKgTableIncrement, "head", false)
+				_, db, err := boot.BootApplicationWithRetry(context.Background(), dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort, bcConnectionProtocol, bcType, bcBootRetryInterval, bcBootMaxRetry, bcKgTableIncrement, "head", false, bcUniqueIdentifier)
+				defer db.Close()
+				Expect(err).To(HaveOccurred())
+			})
+		})
+		Context("When the DB and BC are both up and running, we skip checking for a synced head, but the unique identifier is 0", func() {
+			It("Should not connect successfully", func() {
+				_, db, err := boot.BootApplicationWithRetry(context.Background(), dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort, bcConnectionProtocol, bcType, bcBootRetryInterval, bcBootMaxRetry, bcKgTableIncrement, "head", false, 0)
 				defer db.Close()
 				Expect(err).To(HaveOccurred())
 			})
 		})
 		Context("When the DB is running but not the BC", func() {
 			It("Should not connect successfully", func() {
-				_, _, err := boot.BootApplication(context.Background(), dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, "hi", 100, bcConnectionProtocol, bcKgTableIncrement, true)
+				_, _, err := boot.BootApplication(context.Background(), dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, "hi", 100, bcConnectionProtocol, bcKgTableIncrement, true, bcUniqueIdentifier)
 				Expect(err).To(HaveOccurred())
 			})
 		})
 		Context("When the BC is running but not the DB", func() {
 			It("Should not connect successfully", func() {
-				_, _, err := boot.BootApplication(context.Background(), "hi", 10, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort, bcConnectionProtocol, bcKgTableIncrement, true)
+				_, _, err := boot.BootApplication(context.Background(), "hi", 10, dbName, dbUsername, dbPassword, dbDriver, bcAddress, bcPort, bcConnectionProtocol, bcKgTableIncrement, true, bcUniqueIdentifier)
 				Expect(err).To(HaveOccurred())
 			})
 		})
 		Context("When neither the BC or DB are running", func() {
 			It("Should not connect successfully", func() {
-				_, _, err := boot.BootApplication(context.Background(), "hi", 10, dbName, dbUsername, dbPassword, dbDriver, "hi", 100, bcConnectionProtocol, bcKgTableIncrement, true)
+				_, _, err := boot.BootApplication(context.Background(), "hi", 10, dbName, dbUsername, dbPassword, dbDriver, "hi", 100, bcConnectionProtocol, bcKgTableIncrement, true, bcUniqueIdentifier)
 				Expect(err).To(HaveOccurred())
 			})
 		})

internal/shutdown/shutdown.go

@@ -27,18 +27,9 @@ import (
 )
 
 // Shutdown all the internal services for the application.
-func ShutdownServices(ctx context.Context, notifierCh chan os.Signal, waitTime time.Duration, DB sql.Database, BC *beaconclient.BeaconClient) error {
+func ShutdownServices(ctx context.Context, notifierCh chan os.Signal, waitTime time.Duration, DB sql.Database, BC *beaconclient.BeaconClient, shutdownOperations map[string]gracefulshutdown.Operation) error {
-	successCh, errCh := gracefulshutdown.Shutdown(ctx, notifierCh, waitTime, map[string]gracefulshutdown.Operation{
+	//successCh, errCh := gracefulshutdown.Shutdown(ctx, notifierCh, waitTime, )
-		// Combining DB shutdown with BC because BC needs DB open to cleanly shutdown.
+	successCh, errCh := gracefulshutdown.Shutdown(ctx, notifierCh, waitTime, shutdownOperations)
-		"beaconClient": func(ctx context.Context) error {
-			defer DB.Close()
-			err := BC.StopHeadTracking()
-			if err != nil {
-				loghelper.LogError(err).Error("Unable to trigger shutdown of head tracking")
-			}
-			return err
-		},
-	})
 
 	select {
 	case <-successCh:
@@ -47,3 +38,55 @@ func ShutdownServices(ctx context.Context, notifierCh chan os.Signal, waitTime t
 		return err
 	}
 }
+
+// Wrapper function for shutting down the head tracking process.
+func ShutdownHeadTracking(ctx context.Context, notifierCh chan os.Signal, waitTime time.Duration, DB sql.Database, BC *beaconclient.BeaconClient) error {
+	return ShutdownServices(ctx, notifierCh, waitTime, DB, BC, map[string]gracefulshutdown.Operation{
+		// Combining DB shutdown with BC because BC needs DB open to cleanly shutdown.
+		"beaconClient": func(ctx context.Context) error {
+			defer DB.Close()
+			err := BC.StopHeadTracking()
+			if err != nil {
+				loghelper.LogError(err).Error("Unable to trigger shutdown of head tracking")
+			}
+			if BC.KnownGapsProcess != (beaconclient.KnownGapsProcessing{}) {
+				err = BC.StopKnownGapsProcessing()
+				if err != nil {
+					loghelper.LogError(err).Error("Unable to stop processing known gaps")
+				}
+			}
+			return err
+		},
+	})
+}
+
+// Wrapper function for shutting down the head tracking process.
+func ShutdownHistoricProcessing(ctx context.Context, notifierCh chan os.Signal, waitTime time.Duration, DB sql.Database, BC *beaconclient.BeaconClient) error {
+	return ShutdownServices(ctx, notifierCh, waitTime, DB, BC, map[string]gracefulshutdown.Operation{
+		// Combining DB shutdown with BC because BC needs DB open to cleanly shutdown.
+		"beaconClient": func(ctx context.Context) error {
+			defer DB.Close()
+			err := BC.StopHistoric()
+			if err != nil {
+				loghelper.LogError(err).Error("Unable to stop processing historic")
+			}
+			if BC.KnownGapsProcess != (beaconclient.KnownGapsProcessing{}) {
+				err = BC.StopKnownGapsProcessing()
+				if err != nil {
+					loghelper.LogError(err).Error("Unable to stop processing known gaps")
+				}
+			}
+			return err
+		},
+	})
+}
+
+// Wrapper function for shutting down the application in boot mode.
+func ShutdownBoot(ctx context.Context, notifierCh chan os.Signal, waitTime time.Duration, DB sql.Database, BC *beaconclient.BeaconClient) error {
+	return ShutdownServices(ctx, notifierCh, waitTime, DB, BC, map[string]gracefulshutdown.Operation{
+		// Combining DB shutdown with BC because BC needs DB open to cleanly shutdown.
+		"Database": func(ctx context.Context) error {
+			return DB.Close()
+		},
+	})
+}

internal/shutdown/shutdown_test.go

@@ -35,7 +35,6 @@ import (
 	"github.com/vulcanize/ipld-ethcl-indexer/pkg/gracefulshutdown"
 )
 
-var _ = Describe("Shutdown", func() {
 var (
 	dbAddress              string        = "localhost"
 	dbPort                 int           = 8076
@@ -50,6 +49,7 @@ var _ = Describe("Shutdown", func() {
 	bcBootRetryInterval    int           = 1
 	bcBootMaxRetry         int           = 5
 	bcKgTableIncrement     int           = 10
+	bcUniqueIdentifier     int           = 100
 	maxWaitSecondsShutdown time.Duration = time.Duration(1) * time.Second
 	DB                     sql.Database
 	BC                     *beaconclient.BeaconClient
@@ -57,20 +57,22 @@ var _ = Describe("Shutdown", func() {
 	ctx                    context.Context
 	notifierCh             chan os.Signal
 )
+
+var _ = Describe("Shutdown", func() {
 	BeforeEach(func() {
 		ctx = context.Background()
 		BC, DB, err = boot.BootApplicationWithRetry(ctx, dbAddress, dbPort, dbName, dbUsername, dbPassword, dbDriver, bcAddress,
-			bcPort, bcConnectionProtocol, bcType, bcBootRetryInterval, bcBootMaxRetry, bcKgTableIncrement, "head", true)
+			bcPort, bcConnectionProtocol, bcType, bcBootRetryInterval, bcBootMaxRetry, bcKgTableIncrement, "head", true, bcUniqueIdentifier)
 		notifierCh = make(chan os.Signal, 1)
 		Expect(err).To(BeNil())
 	})
 
-	Describe("Run Shutdown Function,", Label("integration"), func() {
+	Describe("Run Shutdown Function for head tracking,", Label("integration"), func() {
 		Context("When Channels are empty,", func() {
 			It("Should Shutdown Successfully.", func() {
 				go func() {
 					log.Debug("Starting shutdown chan")
-					err = shutdown.ShutdownServices(ctx, notifierCh, maxWaitSecondsShutdown, DB, BC)
+					err = shutdown.ShutdownHeadTracking(ctx, notifierCh, maxWaitSecondsShutdown, DB, BC)
 					log.Debug("We have completed the shutdown...")
 					Expect(err).ToNot(HaveOccurred())
 				}()
@@ -82,7 +84,7 @@ var _ = Describe("Shutdown", func() {
 				//log.SetLevel(log.DebugLevel)
 				go func() {
 					log.Debug("Starting shutdown chan")
-					err = shutdown.ShutdownServices(ctx, notifierCh, maxWaitSecondsShutdown, DB, BC)
+					err = shutdown.ShutdownHeadTracking(ctx, notifierCh, maxWaitSecondsShutdown, DB, BC)
 					log.Debug("We have completed the shutdown...")
 					Expect(err).ToNot(HaveOccurred())
 					shutdownCh <- true
@@ -115,7 +117,7 @@ var _ = Describe("Shutdown", func() {
 				//log.SetLevel(log.DebugLevel)
 				go func() {
 					log.Debug("Starting shutdown chan")
-					err = shutdown.ShutdownServices(ctx, notifierCh, maxWaitSecondsShutdown, DB, BC)
+					err = shutdown.ShutdownHeadTracking(ctx, notifierCh, maxWaitSecondsShutdown, DB, BC)
 					log.Debug("We have completed the shutdown...")
 					Expect(err).To(MatchError(gracefulshutdown.TimeoutErr(maxWaitSecondsShutdown.String())))
 					shutdownCh <- true

pkg/beaconclient/beaconclient.go

@@ -18,6 +18,7 @@ package beaconclient
 import (
 	"context"
 	"fmt"
+	"math/rand"
 
 	"github.com/r3labs/sse"
 	log "github.com/sirupsen/logrus"
@@ -48,6 +49,8 @@ type BeaconClient struct {
 	Db                     sql.Database         // Database object used for reads and writes.
 	Metrics                *BeaconClientMetrics // An object used to keep track of certain BeaconClient Metrics.
 	KnownGapTableIncrement int                  // The max number of slots within a single known_gaps table entry.
+	UniqueNodeIdentifier   int                  // The unique identifier within the cluster of this individual node.
+	KnownGapsProcess       KnownGapsProcessing  // object keeping track of knowngaps processing
 
 	// Used for Head Tracking
 
@@ -66,6 +69,7 @@ type BeaconClient struct {
 	// This value is lazily updated. Therefore at times it will be outdated.
 	LatestSlotInBeaconServer    int64
 	PerformHistoricalProcessing bool               // Should we perform historical processing?
+	HistoricalProcess           historicProcessing // object keeping track of historical processing
 }
 
 // A struct to keep track of relevant the head event topic.
@@ -84,7 +88,17 @@ type SseError struct {
 }
 
 // A Function to create the BeaconClient.
-func CreateBeaconClient(ctx context.Context, connectionProtocol string, bcAddress string, bcPort int, bcKgTableIncrement int) *BeaconClient {
+func CreateBeaconClient(ctx context.Context, connectionProtocol string, bcAddress string, bcPort int, bcKgTableIncrement int, uniqueNodeIdentifier int) (*BeaconClient, error) {
+	if uniqueNodeIdentifier == 0 {
+		uniqueNodeIdentifier := rand.Int()
+		log.WithField("randomUniqueNodeIdentifier", uniqueNodeIdentifier).Warn("No uniqueNodeIdentifier provided, we are going to use a randomly generated one.")
+	}
+
+	metrics, err := CreateBeaconClientMetrics()
+	if err != nil {
+		return nil, err
+	}
+
 	endpoint := fmt.Sprintf("%s://%s:%d", connectionProtocol, bcAddress, bcPort)
 	log.Info("Creating the BeaconClient")
 	return &BeaconClient{
@@ -93,9 +107,10 @@ func CreateBeaconClient(ctx context.Context, connectionProtocol string, bcAddres
 		KnownGapTableIncrement: bcKgTableIncrement,
 		HeadTracking:           createSseEvent[Head](endpoint, BcHeadTopicEndpoint),
 		ReOrgTracking:          createSseEvent[ChainReorg](endpoint, bcReorgTopicEndpoint),
-		Metrics:                CreateBeaconClientMetrics(),
+		Metrics:                metrics,
+		UniqueNodeIdentifier:   uniqueNodeIdentifier,
 		//FinalizationTracking: createSseEvent[FinalizedCheckpoint](endpoint, bcFinalizedTopicEndpoint),
-	}
+	}, nil
 }
 
 // Create all the channels to handle a SSE events

pkg/beaconclient/capturehead_test.go

@@ -54,6 +54,7 @@ var (
 	dbUser                  string = "vdbm"
 	dbPassword              string = "password"
 	dbDriver                string = "pgx"
+	bcUniqueIdentifier      int    = 100
 	dummyParentRoot         string = "46f98c08b54a71dfda4d56e29ec3952b8300cd8d6b67a9b6c562ae96a7a25a42"
 	knownGapsTableIncrement int    = 100000
 	maxRetry                int    = 120
@@ -202,6 +203,7 @@ var (
 		dbPassword:              dbPassword,
 		dbDriver:                dbDriver,
 		knownGapsTableIncrement: knownGapsTableIncrement,
+		bcUniqueIdentifier:      bcUniqueIdentifier,
 	}
 
 	BeaconNodeTester = TestBeaconNode{
@@ -421,6 +423,7 @@ type Config struct {
 	dbPassword              string
 	dbDriver                string
 	knownGapsTableIncrement int
+	bcUniqueIdentifier      int
 }
 
 //////////////////////////////////////////////////////
@@ -430,7 +433,8 @@ type Config struct {
 // Must run before each test. We can't use the beforeEach because of the way
 // Gingko treats race conditions.
 func setUpTest(config Config, maxSlot string) *beaconclient.BeaconClient {
-	bc := *beaconclient.CreateBeaconClient(context.Background(), config.protocol, config.address, config.port, config.knownGapsTableIncrement)
+	bc, err := beaconclient.CreateBeaconClient(context.Background(), config.protocol, config.address, config.port, config.knownGapsTableIncrement, config.bcUniqueIdentifier)
+	Expect(err).ToNot(HaveOccurred())
 	db, err := postgres.SetupPostgresDb(config.dbHost, config.dbPort, config.dbName, config.dbUser, config.dbPassword, config.dbDriver)
 	Expect(err).ToNot(HaveOccurred())
 
@@ -441,7 +445,7 @@ func setUpTest(config Config, maxSlot string) *beaconclient.BeaconClient {
 	writeSlot(db, maxSlot)
 	bc.Db = db
 
-	return &bc
+	return bc
 }
 
 // A helper function to validate the expected output from the ethcl.slots table.

pkg/beaconclient/capturehistoric.go

@@ -22,18 +22,29 @@ import (
 
 	log "github.com/sirupsen/logrus"
 	"github.com/vulcanize/ipld-ethcl-indexer/pkg/database/sql"
+	"github.com/vulcanize/ipld-ethcl-indexer/pkg/loghelper"
 	"golang.org/x/sync/errgroup"
 )
 
 // This function will perform all the heavy lifting for tracking the head of the chain.
 func (bc *BeaconClient) CaptureHistoric(maxWorkers int) []error {
 	log.Info("We are starting the historical processing service.")
-	hp := historicProcessing{db: bc.Db, metrics: bc.Metrics}
+	bc.HistoricalProcess = historicProcessing{db: bc.Db, metrics: bc.Metrics}
-	errs := handleBatchProcess(maxWorkers, hp, hp.db, bc.ServerEndpoint, bc.Metrics)
+	errs := handleBatchProcess(maxWorkers, bc.HistoricalProcess, bc.HistoricalProcess.finishProcessing, bc.HistoricalProcess.db, bc.ServerEndpoint, bc.Metrics)
 	log.Debug("Exiting Historical")
 	return errs
 }
 
+// This function will perform all the necessary clean up tasks for stopping historical processing.
+func (bc *BeaconClient) StopHistoric() error {
+	log.Info("We are stopping the historical processing service.")
+	err := bc.HistoricalProcess.releaseDbLocks()
+	if err != nil {
+		loghelper.LogError(err).WithField("uniqueIdentifier", bc.UniqueNodeIdentifier).Error("We were unable to remove the locks from the ethcl.historic_processing table. Manual Intervention is needed!")
+	}
+	return nil
+}
+
 // An interface to enforce any batch processing. Currently there are two use cases for this.
 //
 // 1. Historic Processing
@@ -41,10 +52,17 @@ func (bc *BeaconClient) CaptureHistoric(maxWorkers int) []error {
 // 2. Known Gaps Processing
 type BatchProcessing interface {
 	getSlotRange(chan<- slotsToProcess) []error       // Write the slots to process in a channel, return an error if you cant get the next slots to write.
-	handleProcessingErrors(<-chan batchHistoricError)
+	handleProcessingErrors(<-chan batchHistoricError) // Custom logic to handle errors.
 	removeTableEntry(<-chan slotsToProcess) error     // With the provided start and end slot, remove the entry from the database.
+	releaseDbLocks() error                            // Update the checked_out column to false for whatever table is being updated.
 }
 
+/// ^^^
+// Might be better to remove the interface and create a single struct that historicalProcessing
+// and knownGapsProcessing can use. The struct would contain all the SQL strings that they need.
+// And the only difference in logic for processing would be within the error handling.
+// Which can be a function we pass into handleBatchProcess()
+
 // A struct to pass around indicating a table entry for slots to process.
 type slotsToProcess struct {
 	startSlot int // The start slot
@@ -71,12 +89,12 @@ type batchHistoricError struct {
 // 4. Remove the slot entry from the DB.
 //
 // 5. Handle any errors.
-func handleBatchProcess(maxWorkers int, bp BatchProcessing, db sql.Database, serverEndpoint string, metrics *BeaconClientMetrics) []error {
+func handleBatchProcess(maxWorkers int, bp BatchProcessing, finishCh chan int, db sql.Database, serverEndpoint string, metrics *BeaconClientMetrics) []error {
 	slotsCh := make(chan slotsToProcess)
 	workCh := make(chan int)
 	processedCh := make(chan slotsToProcess)
 	errCh := make(chan batchHistoricError)
-	finishCh := make(chan []error, 1)
+	finalErrCh := make(chan []error, 1)
 
 	// Start workers
 	for w := 1; w <= maxWorkers; w++ {
@@ -115,7 +133,7 @@ func handleBatchProcess(maxWorkers int, bp BatchProcessing, db sql.Database, ser
 			return bp.removeTableEntry(processedCh)
 		})
 		if err := errG.Wait(); err != nil {
-			finishCh <- []error{err}
+			finalErrCh <- []error{err}
 		}
 	}()
 	// Process errors from slot processing.
@@ -125,12 +143,17 @@ func handleBatchProcess(maxWorkers int, bp BatchProcessing, db sql.Database, ser
 	go func() {
 		errs := bp.getSlotRange(slotsCh) // Periodically adds new entries....
 		if errs != nil {
-			finishCh <- errs
+			finalErrCh <- errs
 		}
-		finishCh <- nil
+		finalErrCh <- nil
 	}()
-
+	log.Debug("Waiting for shutdown signal from channel")
-	errs := <-finishCh
+	select {
+	case <-finishCh:
+		log.Debug("Received shutdown signal from channel")
+		return nil
+	case errs := <-finalErrCh:
 		log.Debug("Finishing the batchProcess")
 		return errs
 	}
+}

pkg/beaconclient/healthcheck_test.go

@@ -25,19 +25,22 @@ import (
 
 var _ = Describe("Healthcheck", func() {
 	var (
-		BC    *beaconclient.BeaconClient
+		Bc    *beaconclient.BeaconClient
 		errBc *beaconclient.BeaconClient
 	)
 
 	BeforeEach(func() {
-		BC = beaconclient.CreateBeaconClient(context.Background(), "http", "localhost", 5052, 10)
+		var err error
-		errBc = beaconclient.CreateBeaconClient(context.Background(), "http", "blah-blah", 1010, 10)
+		Bc, err = beaconclient.CreateBeaconClient(context.Background(), "http", "localhost", 5052, 10, bcUniqueIdentifier)
+		Expect(err).ToNot(HaveOccurred())
+		errBc, err = beaconclient.CreateBeaconClient(context.Background(), "http", "blah-blah", 1010, 10, bcUniqueIdentifier)
+		Expect(err).ToNot(HaveOccurred())
 
 	})
 	Describe("Connecting to the lighthouse client", Label("integration"), func() {
 		Context("When the client is running", func() {
 			It("We should connect successfully", func() {
-				err := BC.CheckBeaconClient()
+				err := Bc.CheckBeaconClient()
 				Expect(err).To(BeNil())
 			})
 		})

pkg/beaconclient/metrics.go

@@ -24,7 +24,7 @@ import (
 )
 
 //Create a metric struct and register each channel with prometheus
-func CreateBeaconClientMetrics() *BeaconClientMetrics {
+func CreateBeaconClientMetrics() (*BeaconClientMetrics, error) {
 	metrics := &BeaconClientMetrics{
 		SlotInserts:              0,
 		ReorgInserts:             0,
@@ -34,17 +34,38 @@ func CreateBeaconClientMetrics() *BeaconClientMetrics {
 		HeadError:                0,
 		HeadReorgError:           0,
 	}
-	prometheusRegisterHelper("slot_inserts", "Keeps track of the number of slots we have inserted.", &metrics.SlotInserts)
+	err := prometheusRegisterHelper("slot_inserts", "Keeps track of the number of slots we have inserted.", &metrics.SlotInserts)
-	prometheusRegisterHelper("reorg_inserts", "Keeps track of the number of reorgs we have inserted.", &metrics.ReorgInserts)
+	if err != nil {
-	prometheusRegisterHelper("known_gaps_inserts", "Keeps track of the number of known gaps we have inserted.", &metrics.KnownGapsInserts)
+		return nil, err
-	prometheusRegisterHelper("known_gaps_processed", "Keeps track of the number of known gaps we processed.", &metrics.knownGapsProcessed)
+	}
-	prometheusRegisterHelper("known_gaps_processing_error", "Keeps track of the number of known gaps we had errors processing.", &metrics.KnownGapsProcessingError)
+	err = prometheusRegisterHelper("reorg_inserts", "Keeps track of the number of reorgs we have inserted.", &metrics.ReorgInserts)
-	prometheusRegisterHelper("head_error", "Keeps track of the number of errors we had processing head messages.", &metrics.HeadError)
+	if err != nil {
-	prometheusRegisterHelper("head_reorg_error", "Keeps track of the number of errors we had processing reorg messages.", &metrics.HeadReorgError)
+		return nil, err
-	return metrics
+	}
+	err = prometheusRegisterHelper("known_gaps_inserts", "Keeps track of the number of known gaps we have inserted.", &metrics.KnownGapsInserts)
+	if err != nil {
+		return nil, err
+	}
+	err = prometheusRegisterHelper("known_gaps_processed", "Keeps track of the number of known gaps we processed.", &metrics.knownGapsProcessed)
+	if err != nil {
+		return nil, err
+	}
+	err = prometheusRegisterHelper("known_gaps_processing_error", "Keeps track of the number of known gaps we had errors processing.", &metrics.KnownGapsProcessingError)
+	if err != nil {
+		return nil, err
+	}
+	err = prometheusRegisterHelper("head_error", "Keeps track of the number of errors we had processing head messages.", &metrics.HeadError)
+	if err != nil {
+		return nil, err
+	}
+	err = prometheusRegisterHelper("head_reorg_error", "Keeps track of the number of errors we had processing reorg messages.", &metrics.HeadReorgError)
+	if err != nil {
+		return nil, err
+	}
+	return metrics, nil
 }
 
-func prometheusRegisterHelper(name string, help string, varPointer *uint64) {
+func prometheusRegisterHelper(name string, help string, varPointer *uint64) error {
 	err := prometheus.Register(prometheus.NewCounterFunc(
 		prometheus.CounterOpts{
 			Namespace:   "beacon_client",
@@ -58,7 +79,9 @@ func prometheusRegisterHelper(name string, help string, varPointer *uint64) {
 		}))
 	if err != nil && err.Error() != "duplicate metrics collector registration attempted" {
 		loghelper.LogError(err).WithField("name", name).Error("Unable to register counter.")
+		return err
 	}
+	return nil
 }
 
 // A structure utilized for keeping track of various metrics. Currently, mostly used in testing.

pkg/beaconclient/processhistoric.go

@@ -40,21 +40,27 @@ var (
 	checkHpEntryStmt string = `SELECT * FROM ethcl.historic_process WHERE checked_out=false;`
 	// Used to checkout a row from the ethcl.historic_process table
 	lockHpEntryStmt string = `UPDATE ethcl.historic_process
-	SET checked_out=true
+	SET checked_out=true, checked_out_by=$3
 	WHERE start_slot=$1 AND end_slot=$2;`
-	// Used to delete an entry from the knownGaps table
+	// Used to delete an entry from the ethcl.historic_process table
 	deleteHpEntryStmt string = `DELETE FROM ethcl.historic_process
 	WHERE start_slot=$1 AND end_slot=$2;`
+	// Used to update every single row that this node has checked out.
+	releaseHpLockStmt string = `UPDATE ethcl.historic_process
+	SET checked_out=false
+	WHERE checked_out_by=$1`
 )
 
 type historicProcessing struct {
-	db      sql.Database
+	db                   sql.Database         //db connection
-	metrics *BeaconClientMetrics
+	metrics              *BeaconClientMetrics // metrics for beaconclient
+	uniqueNodeIdentifier int                  // node unique identifier.
+	finishProcessing     chan int             // A channel which indicates to the process handleBatchProcess function that its time to end.
 }
 
 // Get a single row of historical slots from the table.
 func (hp historicProcessing) getSlotRange(slotCh chan<- slotsToProcess) []error {
-	return getBatchProcessRow(hp.db, getHpEntryStmt, checkHpEntryStmt, lockHpEntryStmt, slotCh)
+	return getBatchProcessRow(hp.db, getHpEntryStmt, checkHpEntryStmt, lockHpEntryStmt, slotCh, strconv.Itoa(hp.uniqueNodeIdentifier))
 }
 
 // Remove the table entry.
@@ -71,6 +77,22 @@ func (hp historicProcessing) handleProcessingErrors(errMessages <-chan batchHist
 	}
 }
 
+func (hp historicProcessing) releaseDbLocks() error {
+	go func() { hp.finishProcessing <- 1 }()
+	log.Debug("Updating all the entries to ethcl.historical processing")
+	res, err := hp.db.Exec(context.Background(), releaseHpLockStmt, hp.uniqueNodeIdentifier)
+	if err != nil {
+		return fmt.Errorf("Unable to remove lock from ethcl.historical_processing table for node %d, error is %e", hp.uniqueNodeIdentifier, err)
+	}
+	log.Debug("Update all the entries to ethcl.historical processing")
+	rows, err := res.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("Unable to calculated number of rows affected by releasing locks from ethcl.historical_processing table for node %d, error is %e", hp.uniqueNodeIdentifier, err)
+	}
+	log.WithField("rowCount", rows).Info("Released historicalProcess locks for specified rows.")
+	return nil
+}
+
 // Process the slot range.
 func processSlotRangeWorker(workCh <-chan int, errCh chan<- batchHistoricError, db sql.Database, serverAddress string, metrics *BeaconClientMetrics) {
 	for slot := range workCh {
@@ -91,7 +113,7 @@ func processSlotRangeWorker(workCh <-chan int, errCh chan<- batchHistoricError,
 // It also locks the row by updating the checked_out column.
 // The statement for getting the start_slot and end_slot must be provided.
 // The statement for "locking" the row must also be provided.
-func getBatchProcessRow(db sql.Database, getStartEndSlotStmt string, checkNewRowsStmt string, checkOutRowStmt string, slotCh chan<- slotsToProcess) []error {
+func getBatchProcessRow(db sql.Database, getStartEndSlotStmt string, checkNewRowsStmt string, checkOutRowStmt string, slotCh chan<- slotsToProcess, uniqueNodeIdentifier string) []error {
 	errCount := make([]error, 0)
 
 	// 5 is an arbitrary number. It allows us to retry a few times before
@@ -148,7 +170,7 @@ func getBatchProcessRow(db sql.Database, getStartEndSlotStmt string, checkNewRow
 		}
 
 		// Checkout the Row
-		res, err := tx.Exec(ctx, checkOutRowStmt, sp.startSlot, sp.endSlot)
+		res, err := tx.Exec(ctx, checkOutRowStmt, sp.startSlot, sp.endSlot, uniqueNodeIdentifier)
 		if err != nil {
 			loghelper.LogSlotRangeStatementError(strconv.Itoa(sp.startSlot), strconv.Itoa(sp.endSlot), checkOutRowStmt, err).Error("Unable to checkout the row")
 			errCount = append(errCount, err)

pkg/beaconclient/processknowngaps.go

@@ -36,7 +36,7 @@ var (
 	checkKgEntryStmt string = `SELECT * FROM ethcl.known_gaps WHERE checked_out=false;`
 	// Used to checkout a row from the ethcl.known_gaps table
 	lockKgEntryStmt string = `UPDATE ethcl.known_gaps
-	SET checked_out=true
+	SET checked_out=true, checked_out_by=$3
 	WHERE start_slot=$1 AND end_slot=$2;`
 	// Used to delete an entry from the knownGaps table
 	deleteKgEntryStmt string = `DELETE FROM ethcl.known_gaps
@@ -44,34 +44,50 @@ var (
 	// Used to check to see if a single slot exists in the known_gaps table.
 	checkKgSingleSlotStmt string = `SELECT start_slot, end_slot FROM ethcl.known_gaps
 	WHERE start_slot=$1 AND end_slot=$2;`
+	// Used to update every single row that this node has checked out.
+	releaseKgLockStmt string = `UPDATE ethcl.known_gaps
+	SET checked_out=false
+	WHERE checked_out_by=$1`
 )
 
-type knownGapsProcessing struct {
+type KnownGapsProcessing struct {
-	db      sql.Database
+	db                   sql.Database         //db connection
-	metrics *BeaconClientMetrics
+	metrics              *BeaconClientMetrics // metrics for beaconclient
+	uniqueNodeIdentifier int                  // node unique identifier.
+	finishProcessing     chan int             // A channel which indicates to the process handleBatchProcess function that its time to end.
 }
 
 // This function will perform all the heavy lifting for tracking the head of the chain.
 func (bc *BeaconClient) ProcessKnownGaps(maxWorkers int) []error {
 	log.Info("We are starting the known gaps processing service.")
-	hp := knownGapsProcessing{db: bc.Db, metrics: bc.Metrics}
+	bc.KnownGapsProcess = KnownGapsProcessing{db: bc.Db, uniqueNodeIdentifier: bc.UniqueNodeIdentifier, metrics: bc.Metrics, finishProcessing: make(chan int)}
-	errs := handleBatchProcess(maxWorkers, hp, hp.db, bc.ServerEndpoint, bc.Metrics)
+	errs := handleBatchProcess(maxWorkers, bc.KnownGapsProcess, bc.KnownGapsProcess.finishProcessing, bc.KnownGapsProcess.db, bc.ServerEndpoint, bc.Metrics)
 	log.Debug("Exiting known gaps processing service")
 	return errs
 }
 
+// This function will perform all the necessary clean up tasks for stopping historical processing.
+func (bc *BeaconClient) StopKnownGapsProcessing() error {
+	log.Info("We are stopping the historical processing service.")
+	err := bc.KnownGapsProcess.releaseDbLocks()
+	if err != nil {
+		loghelper.LogError(err).WithField("uniqueIdentifier", bc.UniqueNodeIdentifier).Error("We were unable to remove the locks from the ethcl.known_gaps table. Manual Intervention is needed!")
+	}
+	return nil
+}
+
 // Get a single row of historical slots from the table.
-func (kgp knownGapsProcessing) getSlotRange(slotCh chan<- slotsToProcess) []error {
+func (kgp KnownGapsProcessing) getSlotRange(slotCh chan<- slotsToProcess) []error {
-	return getBatchProcessRow(kgp.db, getKgEntryStmt, checkKgEntryStmt, lockKgEntryStmt, slotCh)
+	return getBatchProcessRow(kgp.db, getKgEntryStmt, checkKgEntryStmt, lockKgEntryStmt, slotCh, strconv.Itoa(kgp.uniqueNodeIdentifier))
 }
 
 // Remove the table entry.
-func (kgp knownGapsProcessing) removeTableEntry(processCh <-chan slotsToProcess) error {
+func (kgp KnownGapsProcessing) removeTableEntry(processCh <-chan slotsToProcess) error {
 	return removeRowPostProcess(kgp.db, processCh, QueryBySlotStmt, deleteKgEntryStmt)
 }
 
 // Remove the table entry.
-func (kgp knownGapsProcessing) handleProcessingErrors(errMessages <-chan batchHistoricError) {
+func (kgp KnownGapsProcessing) handleProcessingErrors(errMessages <-chan batchHistoricError) {
 	for {
 		errMs := <-errMessages
 
@@ -99,3 +115,18 @@ func (kgp knownGapsProcessing) handleProcessingErrors(errMessages <-chan batchHi
 		}
 	}
 }
+
+// Updated checked_out column for the uniqueNodeIdentifier.
+func (kgp KnownGapsProcessing) releaseDbLocks() error {
+	go func() { kgp.finishProcessing <- 1 }()
+	res, err := kgp.db.Exec(context.Background(), releaseKgLockStmt, kgp.uniqueNodeIdentifier)
+	if err != nil {
+		return err
+	}
+	rows, err := res.RowsAffected()
+	if err != nil {
+		return err
+	}
+	log.WithField("rowCount", rows).Info("Released knownGaps locks for specified rows.")
+	return nil
+}