router.yaml

supergraph:
  listen: 127.0.0.1:4000
  introspection: false

homepage:
  enabled: true

sandbox:
  enabled: false

plugins:
  # Enable with the header, Apollo-Expose-Query-Plan: true
  experimental.expose_query_plan: true

experimental_batching:
  enabled: true
  mode: batch_http_link

# We are running the server in a Lambda, so we have no need for a health check endpoint.
health_check:
  enabled: false

# Propogate all headers to the subgraphs.
headers:
  all:
    request:
      - propagate:
          matching: .*

traffic_shaping:
  all:
    deduplicate_query: true # Enable query deduplication for all subgraphs.
    experimental_retry:
      min_per_sec: 10 # minimal number of retries per second (`min_per_sec`, default is 10 retries per second)
      ttl: 10s # for each successful request, we register a token, that expires according to this option (default: 10s)
      retry_percent: 0.2 # defines the proportion of available retries to the current number of tokens
      retry_mutations: false # allows retries on mutations. This should only be enabled if mutations are idempotent

# Support setting the path to each subgraph via environment variables. This will override the
# ones defined in the composed supergraph.graphql schema. See more at
# https://www.apollographql.com/docs/router/configuration/overview/#subgraph-routing-urls.
override_subgraph_url:
  users: '${env.SUBGRAPH_USERS_URL:-http://127.0.0.1:3065/}'
  products: '${env.SUBGRAPH_PRODUCTS_URL:-http://127.0.0.1:3075/}'
  reviews: '${env.SUBGRAPH_REVIEWS_URL:-http://127.0.0.1:3085/}'