In an NX monorepo I'm building 3 nestjs application, an auth-service + user-service and a gateway to start off with. They're all powered by apollo graphql and following the official nestjs documentation.
The issue that I'm having is that with both the user-service and auth-service up and processing requests successfully as individual servers, at the same time, the gateway throws
Couldn't load service definitions for "auth" at http://localhost:3100/apis/auth-service/graphql: 400: Bad Request
The services themselves are standard graphql applications, nothing basic.
The definitions for the gateway are as such:
{
server: {
debug: true,
playground: true,
autoSchemaFile: './apps/gateway/schema.gql',
sortSchema: true,
introspection: true,
cors: ['*'],
path: '/apis/gateway/graphql';
},
gateway: {
supergraphSdl: new IntrospectAndCompose({
subgraphHealthCheck: true,
subgraphs: [
{
name: 'user',
url: resolveSubgraphUrl('user'),
},
{
name: 'auth',
url: resolveSubgraphUrl('auth'),
},
],
}),
}
}
I have created an nx based monorepository that allows you to reproduce this issue easily, by spinning up all 3 servers in watch mode at the same time, on localhost, on different ports.
Everything is mapped as it should. Link: https://github.com/sebastiangug/nestjs-federation.git
The README contains the two commands necessary to run it as well as the same set of instructions plus the health-checks queries available from each service.
Versions used:
"@apollo/subgraph": "2.1.3",
"@apollo/federation": "0.37.1",
"@apollo/gateway": "2.1.3",
"apollo-server-express": "3.6.7",
"graphql": "16.5.0",
"@nestjs/graphql": "10.1.3",
"@nestjs/platform-express": "9.0.8",
Any ideas what I'm doing wrong here or what further configuration is necessary to achieve this?
Thank you