使用syncthing進行雙機文件同步
syncthing是一款開源的文件同步軟件，可以
syncthing安裝
tar -zxvf syncthing-linux-amd64-v0.12.15.tar.gz
cd syncthing-linux-amd64-v0.12.15
cp syncthing /usr/local/bin
syncthing
[monitor] 08:54:46 INFO: Starting syncthing
[start] 08:54:46 INFO: Generating ECDSA key and certificate for syncthing...
[3TU4X] 08:54:46 INFO: syncthing v0.12.15 "Beryllium Bedbug" (go1.5.3 linux-amd64) unknown-user@build2.syncthing.net 2016-01-17 09:57:20 UTC
[3TU4X] 08:54:46 INFO: My ID: 3TU4XGI-2MDZT5C-A2I67IT-WMXOV6F-ULJPSVA-XKG3A6U-H6LDFBX-XMAX5AA
[3TU4X] 08:54:46 INFO: Single thread hash performance is ~76 MB/s
[3TU4X] 08:54:46 INFO: Error loading config file; using defaults for now
[3TU4X] 08:54:46 INFO: Default folder created and/or linked to new config
[3TU4X] 08:54:46 INFO: Defaults saved. Edit /root/.config/syncthing/config.xml to taste or use the GUI
[3TU4X] 08:54:46 OK: Ready to synchronize default (read-write)
[3TU4X] 08:54:46 INFO: Using discovery server https://discovery-v4-1.syncthing.net/?id=SR7AARM-TCBUZ5O-VFAXY4D-CECGSDE-3Q6IZ4G-XG7AH75-OBIXJQV-QJ6NLQA
[3TU4X] 08:54:46 INFO: Using discovery server https://discovery-v4-2.syncthing.net/?id=DVU36WY-H3LVZHW-E6LLFRE-YAFN5EL-HILWRYP-OC2M47J-Z4PE62Y-ADIBDQC
[3TU4X] 08:54:46 INFO: Using discovery server https://discovery-v4-3.syncthing.net/?id=VK6HNJ3-VVMM66S-HRVWSCR-IXEHL2H-U4AQ4MW-UCPQBWX-J2L2UBK-NVZRDQZ
[3TU4X] 08:54:46 INFO: Using discovery server https://discovery-v6-1.syncthing.net/?id=SR7AARM-TCBUZ5O-VFAXY4D-CECGSDE-3Q6IZ4G-XG7AH75-OBIXJQV-QJ6NLQA
[3TU4X] 08:54:46 INFO: Using discovery server https://discovery-v6-2.syncthing.net/?id=DVU36WY-H3LVZHW-E6LLFRE-YAFN5EL-HILWRYP-OC2M47J-Z4PE62Y-ADIBDQC
[3TU4X] 08:54:46 INFO: Using discovery server https://discovery-v6-3.syncthing.net/?id=VK6HNJ3-VVMM66S-HRVWSCR-IXEHL2H-U4AQ4MW-UCPQBWX-J2L2UBK-NVZRDQZ
[3TU4X] 08:54:46 INFO: Completed initial scan (rw) of folder default
[3TU4X] 08:54:46 INFO: Loading HTTPS certificate: open /root/.config/syncthing/https-cert.pem: no such file or directory
[3TU4X] 08:54:46 INFO: Creating new HTTPS certificate
[3TU4X] 08:54:47 INFO: Device 3TU4XGI-2MDZT5C-A2I67IT-WMXOV6F-ULJPSVA-XKG3A6U-H6LDFBX-XMAX5AA is "test.xxx.net" at [dynamic]
[3TU4X] 08:54:47 INFO: API listening on 127.0.0.1:8384
[3TU4X] 08:54:47 INFO: GUI URL is http://127.0.0.1:8384/
修改配置，實現web遠程登錄
cd /root/.config/syncthing/
vi config.xml
<address>0.0.0.0:8384</address>
而后就可以使用web頁面進行配置。初始頁面如下：
然后就可以點擊右上角的Action->Setting選項進行配置，如果我們在內網使用，就可以關閉發現、中繼和升級等的選項。
點擊首頁Folder欄目下的Add Folder按鈕，用以添加同步的目錄。在需要同步的兩台服務器上都進行文件夾配置，此處我們使用Syncthing同步http訪問的session信息。
下面的步驟就是用於連接兩台的服務器了。首先在其中一台查看device id，也在右上角的Action-> Show ID菜單下。
復制到Device ID后，到另一台服務器的控制頁面，點擊右下角的Add Device按鈕。按如下輸入對端的信息。其中Addresses欄直接填寫對端服務器的IP地址加22000端口。22000端口為默認配置，可以在cconfig.xml文件中進行更改。
一旦配置完成一台服務器，起來去上個廁所，回來后就可以發現另一條服務器的控制頁面會出現連接請求，直接點擊Add Device即可。
然后，按照同步的時間間隔，默認為60秒，等看到Device和Folder狀態都變成Up to Date之后，就表明兩台服務器之間的同步機制就建立完成了。
