Collector docker image custom config

[denny6389]

Describe the question
Is there any way to make a custom config file for Opentelemetry collector docker image? I just need a specific receiver and exporter but the default one has too many resources.

Thank you in advance.

[Martin Hickey]

@denny6389 It should be possible to build an image as described in Using a Locally Built Image.

[mhellsten-ml]

@denny6389, you can mount your config file at /etc/otel-collector.yaml to override the default one.

[Martin Hickey]

Looking at Dockerfile, you might need to mount it to /etc/otel/config.yaml

[denny6389]

I will give it a try. Thank you!!

[mhellsten-ml]

@hickeyma, @denny6389
Ah, I realized I had passed the path of the config file to the container too:

docker-compose.yml:

version: "3.9"

services:
  otel-collector:
    image: otel/opentelemetry-collector:0.52.0
    command: [ "--config=/etc/otel-collector.yaml" ]
    volumes:
      - ./otel-collector.yml:/etc/otel-collector.yaml

[Haroon Said]

We use AWS ECR to keep local images, using a simple bash script:

docker build --build-arg OTEL_VERSION=$OTEL_VERSION -t tools/opentelemetry-collector:$OTEL_VERSION .
aws ecr get-login-password --region us-west-2 | docker login --username AWS --password-stdin $ECR
docker tag tools/opentelemetry-collector:$OTEL_VERSION $ECR/tools/opentelemetry-collector:$OTEL_VERSION
docker push $ECR/tools/opentelemetry-collector:$OTEL_VERSION

The Dockerfile

ARG OTEL_VERSION
FROM otel/opentelemetry-collector:${OTEL_VERSION}
COPY config.yaml /etc/otel-agent-config.yaml
COPY certs/ca.crt /etc/ca.crt
COPY certs/client.pem /etc/client.pem
COPY certs/client.key /etc/client.key
CMD ["--config=/etc/otel-agent-config.yaml"]