Developer FAQ

• Backup your data
• Import data from a backup
• Port 8080 (or other) is already taken ?
• Webpack error 'SyntaxError: Unexpected token ;' ?

Backup your data

Adjust your endpoint (host and port), and the destination where the backup should be created, in the following command:

curl --request POST \
    --url http://localhost:8080/admin \
    --header 'content-type: application/json' \
    --data '{"query":"mutation {\n  export(input: {format: \"rdf\"\n destination: \"/home/admin/src/db/exports/\"\n}) {\n response {\n message\n code\n }\n }\n}"}'

Import data from a backup

Assuming you are in the repo containing the dgraph binary (fractal6/ usually)

Adjust your endpoint (host and port), and the destination (exports/ here) where the backup lives in the following command:

./dgraph live -f exports/*.rdf.* -s exports/*.schema.* -C -a 127.0.0.1:9080 -z 127.0.0.1:5080

Port 8080 (or other) is already taken ?

Note: If you change the port of an already running instance, backup your data and reimport to avoid some network issues.

In order to change the default port using by Dgraph (9080, 8080, 7080, 5080), you need to follow this procedure :

• Change the port_offset in both config files config-zero.yml and config-alpha.yml (it will increment the value of the port with the value who choose).
• The port_offset value should be the same for both file (otherwise Dgraph will complain because of unreachable nodes).
• Increment the port value of my and zero (in both Dgraph's configuration file) as well as port_graphql and port_grpc in the backend configuration file config.toml, accordingly to the offset you have chosen.

Note: Eventually remove or change the path for the data (_data) if you change the port while you already have used or launched Dgraph.

Webpack error 'SyntaxError: Unexpected token ;' ?

Update node to version v14.15 or newer (required by webpack-cli).