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Using the docker compose file

 version: '3' services: sqlserver: image: microsoft/mssql-server-linux:2017-latest ports: - 1401:1433 volumes: - ./db:/tmp/data environment: - ACCEPT_EULA=Y - "MSSQL_SA_PASSWORD='Password99'" command: - /tmp/data/run.sh api: build: context: . dockerfile: dockerfile depends_on: - sqlserver links: - sqlserver ports: - 5000:80 

With appsettings.json connection string:

"ConnectionStrings": { "Entities": "data source=(local),1401;initial catalog=DB_Test;user id=sa;password=Password99;enlist=False;multipleactiveresultsets=True;connect timeout=30;App=EntityFramework" }, 

I get the error

api_1 | System.Data.SqlClient.SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 40 - Could not open a connection to SQL Server)

A connection from a host running api instance to the sql server instance running in docker-compose works fine, so the SQL instance running in the container is fine.

Can anyone help with connectivity between api & sql inside docker?

Thanks!

1 Answer 1

1

Inside docker the hostname for the database will be "sqlserver" not localhost or 127.0.0.1

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This worked, I had to remove the port number also. Thanks!

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