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FastAPI Sample

Build the sample container

docker buildx build --platform linux/amd64,linux/arm64 -t fastapi-echo-sample .

Push the image to an OCI registry your self-hosted NVCF cluster can access and register pull credentials with nvcf-cli registry add. See examples/README.md for the full flow.

Invoke the sample locally

curl --request POST \
  --url localhost:8000/echo \
  --header 'Content-Type: application/json' \
  --data '{
  "message": "hello"
}'

Invoke the sample on self-hosted NVCF

Resolve the cluster gateway and generate an invocation API key via nvcf-cli:

export GATEWAY_ADDR=$(kubectl get gateway nvcf-gateway -n envoy-gateway -o jsonpath='{.status.addresses[0].value}')
export NVCF_API_KEY=$(nvcf-cli api-key generate --description "fastapi-echo-sample" --json | jq -r '.keys[] | select(.service=="function") | .apiKey')

Then call the function through the gateway, routing with the Host header:

curl --request POST \
  --url "http://${GATEWAY_ADDR}/echo" \
  --header "Host: <function-id>.invocation.${GATEWAY_ADDR}" \
  --header "Authorization: Bearer ${NVCF_API_KEY}" \
  --header "Content-Type: application/json" \
  --data '{
  "message": "hello"
}'