METADATA_SERVER_URI and TOKEN_REGISTRY_PORT should be explicitly specified during startup.

[LIGHTFRANTICE]

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When we used the recommended command from the README to start the entire stack and deploy the GraphQL service on the preprod network, we noticed that the background container kept displaying "metadata server unreachable" and frequently restarting. This issue directly prevented us from retrieving data through the GraphQL service.

So, we tried explicitly specifying the following during the restart:

METADATA_SERVER_URI="http://token-metadata-registry:8080"
TOKEN_REGISTRY_PORT=8080

After the restart, we found that the background container ran normally, and after three days of observation, we did not encounter any similar error.

We noticed that in the docker-compose.yml file, the default values for METADATA_SERVER_URI and TOKEN_REGISTRY_PORT in the background container were exactly the same as what we had set (in fact, we are using the default values).

I would like to know if anyone else has been able to reproduce this error? Perhaps we should have explicitly specified these values instead of relying on the default ones shown in the docker-compose.yml file?

[Kammerlo]

Hey @LIGHTFRANTICE, sorry to hear that you had problems starting graphql. But it's first time I heard of this issue, as you said these are the default values.
I assume that you checked, that these values weren't overwritten through any already set environment variable?

[LIGHTFRANTICE]

Hi @Kammerlo , thanks for your question. In fact I was using the following values (I only changed OGMIOS_PORT to 1339 for I cant use port 1338):

DOCKER_BUILDKIT=1 
COMPOSE_DOCKER_CLI_BUILD=1 
NETWORK=preprod 
API_PORT=3101 
HASURA_PORT=8091 
OGMIOS_PORT=1339 
POSTGRES_PORT=5433 

docker-compose -p preprod up -d --build

In this case, the background container kept showing "metadata server unreachable" and frequently restarting.

After I added METADATA_SERVER_URI and TOKEN_REGISTRY_PORT like below, it works well now.

DOCKER_BUILDKIT=1 
COMPOSE_DOCKER_CLI_BUILD=1 
NETWORK=preprod 
API_PORT=3101 
HASURA_PORT=8091 
OGMIOS_PORT=1339 
POSTGRES_PORT=5433 
METADATA_SERVER_URI="http://token-metadata-registry:8080/" 
TOKEN_REGISTRY_PORT=8080 

docker-compose -p preprod up -d --build

I noticed that in the docker-compose.yml file, the default value of METADATA_SERVER_URI and TOKEN_REGISTRY_PORT is exactly the same as what we had set.

      - METADATA_SERVER_URI=${METADATA_SERVER_URI:-http://token-metadata-registry:${TOKEN_REGISTRY_PORT:-8080}}

I am wondering if it is just a mistake or misunderstanding by us, or it should be noticed to specify the METADATA_SERVER_URI and TOKEN_REGISTRY_PORT. (It is like there is somewhere else using the two values but is not well defined ? I am still looking for it now.)

[Kammerlo]

hey @LIGHTFRANTICE, as far as I see it you are understanding it correctly. You are just overwriting the default values, I'm also wondering why this is needed.
I will check with our ops team and will do some tests. Thanks for raising this question!