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

##--------------------------------------------------------------------
## File Transfer
##
## Enables the File Transfer over MQTT feature
##--------------------------------------------------------------------
## Note: This is an example of how to configure this feature
##       you should copy and paste the below data into the emqx.conf for working

## Note: This configuration only works for the EMQX Enterprise version

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 {
            ## Enable the backend
            enable = true

            ## 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
            exporter.s3 {

                ## Disable the backend
                ## Note: Only one backend may be enabled at a time.
                enable = true

                ## 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

                ## Attempt to talk through IPv6 first
                ipv6_probe = true
            }
        }

    }
}