GraphQL engine server flags reference
=====================================

Every GraphQL engine command is structured as:

.. code-block:: bash

   graphql-engine <server-flags> serve <command-flags>

Server flags
^^^^^^^^^^^^

For ``graphql-engine`` command these are the flags available

.. code-block:: none

      --database-url       Postgres database URL
                           <postgres/postgresql>://<user>:<password>@<host>:<port>/<db-name>
                           Example: postgres://admin:mypass@mydomain.com:5432/mydb

  Or either you can specify following options

      --host               Postgres server host
  -p, --port               Postgres server port
  -u, --user               Database user name
  -p, --password           Password of the user
  -d, --dbname             Database name to connect to

Command flags
^^^^^^^^^^^^^

For ``serve`` subcommand these are the flags available

.. code-block:: none

       --server-port        Port on which graphql-engine should be served (default: 8080)
       --access-key         Secret access key, required to access this instance.
                            If specified client needs to send 'X-Hasura-Access-Key'
                            header
       --cors-domain        The domain, including sheme and port, to allow CORS for
       --disable-cors       Disable CORS handling
       --auth-hook          The authentication webhook, required to authenticate
                            incoming request
       --jwt-secret         The JSON containing type and the JWK used for
                            verifying. e.g: `{"type": "HS256", "key":
                           "<your-hmac-shared-secret>"}`,`{"type": "RS256",
                           "key": "<your-PEM-RSA-public-key>"}
   -s, --stripes            Number of stripes
   -c, --connections        Number of connections that need to be opened to Postgres
       --timeout            Each connection's idle time before it is closed
   -i, --tx-iso             Transaction isolation. read-commited / repeatable-read /
                            serializable
       --root-dir           This static dir is served at / and takes precedence over
                            all routes
       --enable-console     Enable API console. It is served at '/' and '/console'


Default environment variables
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

You can use environment variables to configure defaults instead of using flags:

For example:

.. code-block:: bash

   HASURA_GRAPHQL_DATABASE_URL=postgres://user:pass@host:5432/dbname graphql-engine serve


These are the environment variables which are available:

.. code-block:: none

   HASURA_GRAPHQL_DATABASE_URL      Postgres database URL
                                    <postgres/postgresql>://<user>:<password>@<host>:<port>/<db-
                                    name>
                                    Example: postgres://admin:mypass@mydomain.com:5432/mydb

   HASURA_GRAPHQL_ACCESS_KEY        Secret access key, required to access this instance.
                                    If specified client needs to send 'X-Hasura-Access-Key'
                                    header

   HASURA_GRAPHQL_AUTH_HOOK         The authentication webhook, required to authenticate
                                    incoming request  

   HASURA_GRAPHQL_CORS_DOMAIN       The domain, including sheme and port, to allow CORS for

   HASURA_GRAPHQL_JWT_SECRET        The JSON containing type and the JWK used for
                                    verifying. e.g: `{"type": "HS256", "key":
                                    "<your-hmac-shared-secret>"}`,`{"type": "RS256",
                                    "key": "<your-PEM-RSA-public-key>"}
                                    Enable JWT mode, the value of which is a JSON

   HASURA_GRAPHQL_ENABLE_CONSOLE    Enable API console. It is served at '/' and '/console'


.. note::
  When the equivalent flags for environment variables are used, the flags will take precedence.