[Bug] Cannot support multiple chains

[ziyiyu]

Bug report

I want to listen to multiple chains within a single graph node, and I noticed the description in the docker/Dockerfile file is as follows:
# The etherum network(s) to connect to. Set this to a space-separated list of the networks where each entry has the form NAME:URL
ENV ethereum=""
This seems to imply support for multi-chain.But when I use multiple chains in docker/docker-compose.yml
ethereum: 'mainnet:http://host.docker.internal:8545 polygon:http://host.docker.internal:8545'
The following error will occur.

I'm not sure if this is a bug or if multi-chain monitoring is currently not supported.

Relevant log output

graph-node-1  | Waiting for Postgres (postgres:5432)
graph-node-1  | error: unexpected argument 'polygon:http://host.docker.internal:8545' found
graph-node-1  | 
graph-node-1  | Usage: graph-node [OPTIONS]
graph-node-1  | 
graph-node-1  | For more information, try '--help

IPFS hash

No response

Subgraph name or link to explorer

No response

Some information to help us out

• Tick this box if this bug is caused by a regression found in the latest release.
• Tick this box if this bug is specific to the hosted service.
• I have searched the issue tracker to make sure this issue is not a duplicate.

OS information

Linux

[ootiger]

I have the same problem, when will resolve this？ @Jannis

[akanoce]

Encountered the same issue, and seems like the only working solution is to pass the config via config.toml like

[store]
primary = { connection = "postgresql://${postgres_user}:${postgres_pass}@${postgres_host}:${postgres_port}/${postgres_db}", pool_size = 50 }

[deployment]
[[deployment.rule]]
indexers = ["default"]

[chains]
ingestor = "block_ingestor_node"

[chains.mainnet]
shard = "primary"
provider = [
    { label = "mainnet", url = "http://mainnet:8545", features = [
        "archive",
        "traces",
    ] },
]

[chains.testnet]
shard = "primary"
provider = [
    { label = "testnet", url = "http://testnet:8545", features = [
        "archive",
        "traces",
    ] },
]

where testnet:8545 and mainnet:8545 are the addresses or the RPC nodes you want to connect to