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Programming language: Go
License: Apache License 2.0
Tags: File Handling    

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README

gofs

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English | [简体中文](README-CN.md)

A cross-platform file synchronization tool out of the box based on golang.

Installation

The first need Go installed (version 1.18+ is required), then you can use the below command to install gofs.

go install github.com/no-src/gofs/[email protected]

Run In Docker

If you want to run in a docker, you should install or build with the -tags netgo flag or set the environment CGO_ENABLED=0, otherwise you may get an error that the gofs not found, when the docker container is running.

go install -tags netgo github.com/no-src/gofs/[email protected]

You can use the build-docker.sh script to build the docker image and you should clone this repository and cd to the root path of the repository first.

$ ./scripts/build-docker.sh

Or pull the docker image directly from DockerHub with the command below.

$ docker pull nosrc/gofs

For more scripts about release and docker, see the scripts directory.

Run In the Background

You can install a program run in the background using the following command on Windows.

go install -ldflags="-H windowsgui" github.com/no-src/gofs/[email protected]

Quick Start

Prerequisites

Please ensure the source directory and dest directory exists first, replace the following path with your real path.

$ mkdir source dest

Generate the TLS cert file and key file for testing purposes.

The TLS cert and key files are just used by File Server and Remote Disk Server.

$ go run $GOROOT/src/crypto/tls/generate_cert.go --host 127.0.0.1
2021/12/30 17:21:54 wrote cert.pem
2021/12/30 17:21:54 wrote key.pem

Look up our workspace.

$ ls
cert.pem  key.pem  source  dest

Local Disk

Monitor source directory and sync change files to dest directory.

You can use the logically_delete flag to enable the logically delete and avoid deleting files by mistake.

Set the checkpoint_count flag to use the checkpoint in the file to reduce transfer unmodified file chunks, by default checkpoint_count=10, which means it has 10+2 checkpoints at most. There are two additional checkpoints at the head and tail. The first checkpoint is equal to the chunk_size, it is optional. The last checkpoint is equal to the file size, it is required. The checkpoint offset set by the checkpoint_count is always more than chunk_size, unless the file size is less than or equal to chunk_size, then the checkpoint_count will be zero, so it is optional.

By default, if the file size and file modification time of the source file is equal to the destination file, then ignore the current file transfer. You can use the force_checksum flag to force enable the checksum to compare whether the file is equal or not.

The default checksum hash algorithm is md5, you can use the checksum_algorithm flag to change the default hash algorithm, current supported algorithms: md5, sha1, sha256, sha512, crc32, crc64, adler32, fnv-1-32 , fnv-1a-32, fnv-1-64, fnv-1a-64, fnv-1-128, fnv-1a-128.

If you want to reduce the frequency of synchronization, you can use the sync_delay flag to enable sync delay, start sync when the event count is equal or greater than sync_delay_events, or wait for sync_delay_time interval time since the last sync.

$ gofs -source=./source -dest=./dest

Sync Once

Sync the whole path immediately from source directory to dest directory.

$ gofs -source=./source -dest=./dest -sync_once

Sync Cron

Sync the whole path from source directory to dest directory with cron.

# Per 30 seconds sync the whole path from source directory to dest directory
$ gofs -source=./source -dest=./dest -sync_cron="*/30 * * * * *"

Daemon Mode

Start a daemon to create subprocess to work, and record pid info to pid file.

$ gofs -source=./source -dest=./dest -daemon -daemon_pid

File Server

Start a file server for source directory and dest directory.

The file server is use HTTPS default, set the tls_cert_file and tls_key_file flags to customize the cert file and key file.

You can disable the HTTPS by set the tls flag to false if you don't need it.

If you set the tls to true, the file server default port is 443, otherwise it is 80, and you can customize the default port with the server_addr flag, like -server_addr=":443".

If you enable the tls flag on the server side, you can control whether a client skip verifies the server's certificate chain and host name by the tls_insecure_skip_verify flag, default is true.

You should set the rand_user_count flag to auto generate some random users or set the users flag to customize server users for security reasons.

The server users will output to log if you set the rand_user_count flag greater than zero.

If you need to compress the files, add the server_compress flag to enable gzip compression for response, but it is not fast now, and may reduce transmission efficiency in the LAN.

# Start a file server and create three random users
# Replace the `tls_cert_file` and `tls_key_file` flags with your real cert files in the production environment
$ gofs -source=./source -dest=./dest -server -tls_cert_file=cert.pem -tls_key_file=key.pem -rand_user_count=3

Remote Disk Server

Start a remote disk server as a remote file source.

The source flag detail see Remote Server Source Protocol.

Pay attention to that remote disk server users must have read permission at least, for example, -users="gofs|password|r".

You can use the checkpoint_count and sync_delay flags like the Local Disk.

# Start a remote disk server
# Replace the `tls_cert_file` and `tls_key_file` flags with your real cert files in the production environment
# Replace the `users` flag with complex username and password for security
$ gofs -source="rs://127.0.0.1:8105?mode=server&local_sync_disabled=true&path=./source&fs_server=https://127.0.0.1" -dest=./dest -users="gofs|password|r" -tls_cert_file=cert.pem -tls_key_file=key.pem

Remote Disk Client

Start a remote disk client to sync change files from remote disk server.

The source flag detail see Remote Server Source Protocol.

Use the sync_once flag to sync the whole path immediately from remote disk server to local dest directory, like Sync Once.

Use the sync_cron flag to sync the whole path from remote disk server to local dest directory with cron, like Sync Cron.

Use the force_checksum flag to force enable the checksum to compare whether the file is equal or not, like Local Disk.

You can use the sync_delay flag like the Local Disk.

# Start a remote disk client
# Replace the `users` flag with your real username and password
$ gofs -source="rs://127.0.0.1:8105" -dest=./dest -users="gofs|password"

Remote Push Server

Start a Remote Disk Server as a remote file source, then enable the remote push server with the push_server flag.

Pay attention to that remote push server users must have read and write permission at least, for example, -users="gofs|password|rw".

# Start a remote disk server and enable the remote push server
# Replace the `tls_cert_file` and `tls_key_file` flags with your real cert files in the production environment
# Replace the `users` flag with complex username and password for security
$ gofs -source="rs://127.0.0.1:8105?mode=server&local_sync_disabled=true&path=./source&fs_server=https://127.0.0.1" -dest=./dest -users="gofs|password|rw" -tls_cert_file=cert.pem -tls_key_file=key.pem -push_server

Remote Push Client

Start a remote push client to sync change files to the Remote Push Server.

Use the chunk_size flag to set the chunk size of the big file to upload. The default value of chunk_size is 1048576, which means 1MB.

You can use the checkpoint_count and sync_delay flags like the Local Disk.

More flag usage see Remote Disk Client.

# Start a remote push client and enable local disk sync, sync the file changes from source path to the local dest path and the remote push server
# Replace the `users` flag with your real username and password
$ gofs -source="./source" -dest="rs://127.0.0.1:8105?local_sync_disabled=false&path=./dest" -users="gofs|password"

Relay

If you need to synchronize files between two devices that are unable to establish a direct connection, you can use a reverse proxy as a relay server. In more detail, see also Relay.

Remote Server Source Protocol

The remote server source protocol is based on URI, see RFC 3986.

Scheme

The scheme name is rs.

Host

The remote server source uses 0.0.0.0 or other local ip address as host in Remote Disk Server mode, and use ip address or domain name as host in Remote Disk Client mode.

Port

The remote server source port, default is 8105.

Parameter

Use the following parameters in Remote Disk Server mode only.

Example

For example, in Remote Disk Server mode.

 rs://127.0.0.1:8105?mode=server&local_sync_disabled=true&path=./source&fs_server=https://127.0.0.1
 \_/  \_______/ \__/ \____________________________________________________________________________/
  |       |       |                                      |
scheme   host    port                                parameter

Manage API

Enable manage api base on File Server by using the manage flag.

By default, allow to access manage api by private address and loopback address only.

You can disable it by setting the manage_private flag to false.

$ gofs -source=./source -dest=./dest -server -tls_cert_file=cert.pem -tls_key_file=key.pem -rand_user_count=3 -manage

Profiling API

The pprof url address like this

https://127.0.0.1/manage/pprof/

Config API

Reading the program config, default return the config with json format, and support json and yaml format currently.

https://127.0.0.1/manage/config

Or use the format parameter to specific the config format.

https://127.0.0.1/manage/config?format=yaml

Report API

Use the report flag to enable report api route, and start to collect the report data, need to enable the manage flag first.

The details of the report api see Report API.

https://127.0.0.1/manage/report

Logger

Enable the file logger and console logger by default, and you can disable the file logger by setting the log_file flag to false.

Use the log_level flag to set the log level, default is INFO, (DEBUG=0 INFO=1 WARN=2 ERROR=3).

Use the log_dir flag to set the directory of the log file, default is ./logs/.

Use the log_flush flag to enable auto flush log with interval, default is true.

Use the log_flush_interval flag to set the log flush interval duration, default is 3s.

Use the log_event flag to enable the event log, write to file, default is false.

Use the log_sample_rate flag to set the sample rate for the sample logger, and the value ranges from 0 to 1, default is 1.

# set the logger config in "Local Disk" mode
$ gofs -source=./source -dest=./dest -log_file -log_level=0 -log_dir="./logs/" -log_flush -log_flush_interval=3s -log_event

Use Configuration File

If you want, you can use a configuration file to replace all the flags.It supports json and yaml format currently.

All the configuration fields are the same as the flags, you can refer to the Configuration Example or the response of Config API.

$ gofs -conf=./gofs.yaml

Checksum

You can use the checksum flag to calculate the file checksum and print the result.

The chunk_size, checkpoint_count and checksum_algorithm flags are effective here the same as in the Local Disk.

$ gofs -source=./gofs -checksum

For More Information

Help Info

$ gofs -h

Version Info

$ gofs -v

About Info

$ gofs -about


*Note that all licence references and agreements mentioned in the gofs README section above are relevant to that project's source code only.