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‎.env

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# Image info
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IMAGE_VERSION=0.1.0
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IMAGE_NAME=otel-target-allocator-talk
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CONTEXT=./src/python

‎.gitignore

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venv*
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pyenv.cfg
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*example*
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.DS_Store
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otelcol-config-extras*.yml

‎README.md

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# otel-target-allocator-talk
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## Installation
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### 1- Install KinD and set up k8s cluster
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The scripts below will install KinD, and then will install the following in the newly-created cluster:
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* the `PodMonitor` and `ServiceMonitor` Prometheus CRs
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* `cert-manager` (an OTel Operator pre-requisite)
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* the OTel Operator.
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```bash
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./src/scripts/01-install-kind.sh
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./src/scripts/02-k8s-setup.sh
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```
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### 2- Build and deploy image
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Build Docker image and deploy to KinD
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```bash
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./src/scripts/03-build-and-deploy-images.sh
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```
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### 3- Kubernetes deployment
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Deploy Kubernetes resources
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```bash
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./src/scripts/04-deploy-resources.sh
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```

‎docker-compose.yml

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version: '0.1'
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x-default-logging: &logging
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options:
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max-size: "5m"
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max-file: "2"
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networks:
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default:
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name: otel-lab
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driver: bridge
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services:
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py-ta-example:
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container_name: py-ta-example
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image: ${IMAGE_NAME}:${IMAGE_VERSION}-py-ta-example
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build:
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context: ${CONTEXT}
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dockerfile: Dockerfile.app
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ports:
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- "8080:8080"
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# environment:
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# - OTEL_RESOURCE_ATTRIBUTES=service.name=py-ta-example,service.version=0.1.0
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stop_grace_period: 1s
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# py-otel-client:
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# container_name: py-otel-client
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# image: ${IMAGE_NAME}:${IMAGE_VERSION}-py-otel-client
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# build:
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# context: ${CONTEXT}
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# dockerfile: Dockerfile.client
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# depends_on:
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# py-otel-server:
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# condition: service_started
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# environment:
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# - DESTINATION_URL=http://py-otel-server:8082/rolldice
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# stop_grace_period: 1s
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# py-otel-server:
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# container_name: py-otel-server
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# image: ${IMAGE_NAME}:${IMAGE_VERSION}-py-otel-server
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# build:
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# context: ${CONTEXT}
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# dockerfile: Dockerfile.server
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# ports:
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# - "8082:8082"
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# environment:
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# - OTEL_RESOURCE_ATTRIBUTES=service.name=py-otel-server,service.version=0.1.0
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# stop_grace_period: 1s

‎src/python/Dockerfile.app

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FROM python:3.10-slim
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EXPOSE 8080
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WORKDIR /app
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COPY ./requirements.txt ./app.py .
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RUN pip3 install -r ./requirements.txt
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CMD ["python", "app.py"]

‎src/python/README.md

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# Python App
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## Setup
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Set up the Python environment
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```bash
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python3 -m venv src/python/venv
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source src/python/venv/bin/activate
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pip install --upgrade pip
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# Installs dependencies
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pip install -r solution/python/requirements.txt
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# opentelemetry-bootstrap -a install
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```
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‎src/python/app.py

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import random
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import time
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from prometheus_client import start_http_server, Counter
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some_counter = Counter(name="some_counter", documentation="Sample counter")
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def main() -> None:
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while True:
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random_sleep_time = random.randint(1, 20)
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print(f"Sleeping for {random_sleep_time} seconds", flush=True)
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time.sleep(random_sleep_time)
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some_counter.inc()
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if __name__ == "__main__":
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start_http_server(port=8080)
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main()

‎src/python/requirements.txt

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prometheus_client==0.20.0

‎src/resources/01-app-deployment.yml

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---
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apiVersion: v1
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kind: Namespace
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metadata:
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name: application
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---
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: py-otel-server
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namespace: application
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labels:
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app: py-otel-server
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app.kubernetes.io/name: py-otel-server
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spec:
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replicas: 1
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selector:
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matchLabels:
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app: py-otel-server
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app.kubernetes.io/name: py-otel-server
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template:
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metadata:
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labels:
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app: py-otel-server
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app.kubernetes.io/name: py-otel-server
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spec:
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containers:
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- name: py-otel-server
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image: otel-python-lab:0.1.0-py-otel-server
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# image: docker.io/library/otel-python-lab:0.1.0-py-otel-server
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imagePullPolicy: Never
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ports:
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- containerPort: 8082
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name: py-server-port
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env:
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- name: OTEL_RESOURCE_ATTRIBUTES
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value: service.name=py-otel-server,service.version=0.1.0
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---
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apiVersion: v1
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kind: Service
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metadata:
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name: py-otel-server-svc
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namespace: application
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labels:
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app: py-otel-server
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app.kubernetes.io/name: py-otel-server
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spec:
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selector:
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app.kubernetes.io/name: py-otel-server
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ports:
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- name: py-server-port
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protocol: TCP
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port: 8082
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targetPort: py-server-port

‎src/resources/01-blah.yml

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---
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apiVersion: v1
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kind: Namespace
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metadata:
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name: opentelemetry
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---
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: my-app
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namespace: opentelemetry
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spec:
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replicas: 1
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selector:
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matchLabels:
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app: my-app
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template:
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metadata:
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labels:
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app: my-app
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spec:
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containers:
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- name: my-app
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image: otel-target-allocator-talk:0.1.0-py-ta-example
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imagePullPolicy: Always
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ports:
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- name: prom
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containerPort: 8080
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---
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apiVersion: v1
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kind: Service
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metadata:
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name: my-app
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namespace: opentelemetry
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labels:
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app: my-app
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spec:
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selector:
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app: my-app
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ports:
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- name: prom
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port: 8080

‎src/resources/02-rbac.yml

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apiVersion: v1
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kind: ServiceAccount
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metadata:
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name: otelcol
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namespace: opentelemetry
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRole
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metadata:
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name: opentelemetry-targetallocator-cr-role
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namespace: opentelemetry
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rules:
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- apiGroups:
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- monitoring.coreos.com
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resources:
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- servicemonitors
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- podmonitors
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verbs:
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- '*'
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRoleBinding
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metadata:
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name: otelcol-prom
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namespace: opentelemetry
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subjects:
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- kind: ServiceAccount
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name: otelcol
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namespace: default
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roleRef:
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kind: ClusterRole
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name: opentelemetry-targetallocator-cr-role
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apiGroup: rbac.authorization.k8s.io
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRole
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metadata:
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name: opentelemetry-targetallocator-role
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namespace: opentelemetry
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rules:
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- apiGroups: [""]
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resources:
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- nodes
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- nodes/metrics
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- services
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- endpoints
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- pods
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verbs: ["get", "list", "watch"]
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- apiGroups: [""]
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resources:
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- configmaps
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verbs: ["get"]
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- apiGroups:
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- discovery.k8s.io
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resources:
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- endpointslices
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verbs: ["get", "list", "watch"]
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- apiGroups:
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- networking.k8s.io
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resources:
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- ingresses
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verbs: ["get", "list", "watch"]
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- nonResourceURLs: ["/metrics"]
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verbs: ["get"]
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---
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apiVersion: rbac.authorization.k8s.io/v1
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kind: ClusterRoleBinding
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metadata:
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name: otelcol-discovery
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namespace: opentelemetry
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subjects:
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- kind: ServiceAccount
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name: otelcol
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namespace: default
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roleRef:
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kind: ClusterRole
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name: opentelemetry-targetallocator-role
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apiGroup: rbac.authorization.k8s.io

‎src/resources/03-otel-collector.yml

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apiVersion: opentelemetry.io/v1alpha1
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kind: OpenTelemetryCollector
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metadata:
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name: otelcol
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namespace: opentelemetry
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spec:
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mode: statefulset
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targetAllocator:
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image: ghcr.io/open-telemetry/opentelemetry-operator/target-allocator:main
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enabled: true
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serviceAccount: otelcol
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prometheusCR:
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enabled: true
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serviceMonitorSelector:
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app: my-app
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config: |
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receivers:
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prometheus:
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config:
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scrape_configs:
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- job_name: 'otel-collector'
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scrape_interval: 30s
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static_configs:
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- targets: [ '0.0.0.0:8888' ]
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target_allocator:
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endpoint: http://otelcol-targetallocator
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interval: 30s
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collector_id: "${POD_NAME}"
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exporters:
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logging:
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verbosity: detailed
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service:
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pipelines:
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metrics:
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receivers: [prometheus]
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processors: []
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exporters: [logging]

‎src/resources/04-service-monitor.yml

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apiVersion: monitoring.coreos.com/v1
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kind: ServiceMonitor
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metadata:
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name: my-app
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namespace: opentelemetry
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labels:
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app: my-app
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release: prometheus
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spec:
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selector:
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matchLabels:
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app: my-app
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endpoints:
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- port: prom
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path: /metrics

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