Cross processes context propagation not working in the getting started doc

[danhngo-lx]

Describe the bug

I deployed the emojivoto services to my K8s cluster. Then tried to play around with the web service. I found out that the cross processes context propagation is not working. Here's the trace of the api leaderboard:

There're only spans for the emojivoto-web service. No spans for other services.

Environment

• Grafana: 9.5.2
• Kubernetes: 1.26.3
• Version: v0.10.1-alpha

To Reproduce

Steps to reproduce the behavior:

1. Deploy emojivoto as in https://github.com/open-telemetry/opentelemetry-go-instrumentation/tree/main/docs/getting-started
2. Access the web service, vote an emoji, go back and forth between the leaderboard page
3. Search for the trace of emojivoto-web service, operation name /emojivoto.v1.VotingService/Results
4. Click on a trace

Expected behavior

• Trace of leaderboard api has spans of other services such as emojivoto-voting, emojivoto-emoji.

Additional context

Here's my emojivoto-instrumented.yaml file:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: emoji
  namespace: tracing
  labels:
    app.kubernetes.io/name: emoji
    app.kubernetes.io/part-of: emojivoto
    app.kubernetes.io/version: v11
spec:
  replicas: 1
  selector:
    matchLabels:
      app: emoji-svc
      version: v11
  template:
    metadata:
      labels:
        app: emoji-svc
        version: v11
    spec:
      serviceAccountName: emoji
      shareProcessNamespace: true
      terminationGracePeriodSeconds: 0
      containers:
        - env:
            - name: GRPC_PORT
              value: "8080"
            - name: PROM_PORT
              value: "8801"
          image: docker.l5d.io/buoyantio/emojivoto-emoji-svc:v11
          name: emoji-svc
          ports:
            - containerPort: 8080
              name: grpc
            - containerPort: 8801
              name: prom
          resources:
            requests:
              cpu: 100m
        - name: emojivoto-emoji-instrumentation
          image: otel/autoinstrumentation-go
          imagePullPolicy: IfNotPresent
          env:
            - name: OTEL_GO_AUTO_TARGET_EXE
              value: /usr/local/bin/emojivoto-emoji-svc
            - name: OTEL_EXPORTER_OTLP_ENDPOINT
              value: "http://jaeger:4318"
            - name: OTEL_SERVICE_NAME
              value: "emojivoto-emoji"
            # - name: OTEL_PROPAGATORS
            #   value: b3multi
          securityContext:
            runAsUser: 0
            privileged: true
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: voting
  namespace: tracing
  labels:
    app.kubernetes.io/name: voting
    app.kubernetes.io/part-of: emojivoto
    app.kubernetes.io/version: v11
spec:
  replicas: 1
  selector:
    matchLabels:
      app: voting-svc
      version: v11
  template:
    metadata:
      labels:
        app: voting-svc
        version: v11
    spec:
      serviceAccountName: voting
      shareProcessNamespace: true
      terminationGracePeriodSeconds: 0
      containers:
        - env:
            - name: GRPC_PORT
              value: "8080"
            - name: PROM_PORT
              value: "8801"
          image: docker.l5d.io/buoyantio/emojivoto-voting-svc:v11
          name: voting-svc
          ports:
            - containerPort: 8080
              name: grpc
            - containerPort: 8801
              name: prom
          resources:
            requests:
              cpu: 100m
        - name: emojivoto-voting-instrumentation
          image: otel/autoinstrumentation-go
          imagePullPolicy: IfNotPresent
          env:
            - name: OTEL_GO_AUTO_TARGET_EXE
              value: /usr/local/bin/emojivoto-voting-svc
            - name: OTEL_EXPORTER_OTLP_ENDPOINT
              value: "http://jaeger:4318"
            - name: OTEL_SERVICE_NAME
              value: "emojivoto-voting"
            # - name: OTEL_PROPAGATORS
            #   value: b3multi
          securityContext:
            runAsUser: 0
            privileged: true
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: web
  namespace: tracing
  labels:
    app.kubernetes.io/name: web
    app.kubernetes.io/part-of: emojivoto
    app.kubernetes.io/version: v11
spec:
  replicas: 1
  selector:
    matchLabels:
      app: web-svc
      version: v11
  template:
    metadata:
      labels:
        app: web-svc
        version: v11
    spec:
      serviceAccountName: web
      shareProcessNamespace: true
      terminationGracePeriodSeconds: 0
      containers:
        - env:
            - name: WEB_PORT
              value: "8080"
            - name: EMOJISVC_HOST
              value: emoji-svc.tracing:8080
            - name: VOTINGSVC_HOST
              value: voting-svc.tracing:8080
            - name: INDEX_BUNDLE
              value: dist/index_bundle.js
          image: docker.l5d.io/buoyantio/emojivoto-web:v11
          name: web-svc
          ports:
            - containerPort: 8080
              name: http
          resources:
            requests:
              cpu: 100m
        - name: emojivoto-web-instrumentation
          image: otel/autoinstrumentation-go
          imagePullPolicy: IfNotPresent
          env:
            - name: OTEL_GO_AUTO_TARGET_EXE
              value: /usr/local/bin/emojivoto-web
            - name: OTEL_EXPORTER_OTLP_ENDPOINT
              value: "http://jaeger:4318"
            - name: OTEL_SERVICE_NAME
              value: "emojivoto-web"
            # - name: OTEL_PROPAGATORS
            #   value: b3multi
          securityContext:
            runAsUser: 0
            privileged: true