emqx4.3/rel/config/ee-examples/file_transfer-with-s3-exporter.conf.example

## File Transfer over MQTT
##
## Enables the File Transfer over MQTT feature
## Note: This configuration is only applicable for EMQX Enterprise edition 5.1 or later.

file_transfer {
    ## Enable the File Transfer feature
    enable = true

    ## Storage backend settings
    storage {
        ## Local file system backend setting
        ## Currently, it's the only available storage backend.
        local {

            ## Segments and temporary files storage settings
            segments {
                ## Directory where these files are stored
                root = "/var/lib/emqx/transfers/segments"

                ## Garbage collection settings
                gc {
                    ## How often to run GC
                    interval = 1h

                    ## Maximum time to keep parts of incomplete transfers for
                    maximum_segments_ttl = 24h
                }
            }

            ## S3-compatible object storage exporter
            ## Enable the backend
            ## Note: Can only configure one backend at a time
            ## One can set 'exporter.s3.enable=false' to disable it
            ## while keeping the configuration context
            exporter.s3 {

                ## Endpoint of S3 API of the object storage service of your choice
                host = "s3.us-east-1.amazonaws.com"
                port = 443

                ## Credentials to use to authorize with the S3 API
                access_key_id = "AKIA27EZDDM9XLINWXFE"
                secret_access_key = "******"

                ## Which bucket to store transferred files in?
                bucket = "my-bucket"

                ## TTL of file download URLs exposed through File Transfer API
                url_expire_time = 1h

                ## Enable the HTTPS
                transport_options {
                    ssl.enable = true

                    ## Timeout for connection attempts
                    connect_timeout = 15s
               }
           }
        }
    }
}