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Scripts and templates to monitor Syncthing with Zabbix
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It was about Christmas and I started to feel a little nerdy. So inside of me a wish was growing up: I wanted to have an overview over all the backup- and sync-processes I run during the day. So I installed Zabbix and started to play around with its extensions. This is a Bash-script consuming (one says so, right?) the RestAPI of Syncthing. When installed in your Zabbix-scripts-directory and after deploying the Template you may see the following data per Syncthing-folder:

  • device-last-seen (string): when was the remote device seen for the last time?
  • last-folder-scan-time (string): when happened the last local scan of the folder?
  • last-sync-time (string): when was a file synced for the last time?
  • last-synced-file (string): guess what?!? ;-)

Furthermore a quite expensive /rest/db/status-call is done to catch values like:

  • globalBytes, inSyncBytes, needBytes: amount of bytes in total, in sync and to by synced
  • globalFiles, inSyncFiles, needFiles: amount of files in total, in sync and to be synced
  • errors, pullErrors: amount of files that failed

Install and Configure

  1. download and install it to you ExternalScripts-directory (zabbix_server.conf -> ExternalScripts)
  2. make it executable: chmod a+x
  3. carefully read the output of ./ --help - I hate to document and I did it just for you! ;-)

To access Syncthing you need an API-Key. You get it by looking in Syncthing's WebApp at Actions -> Advanced. By default the Syncthing-Server can be defined via commandline (--ip, --port, --apikey -> the template is intended to use this too). But there might be situations in which you don't want to have your API-Key stored on Zabbix. In these cases you may add one or many Syncthing-hosts by:

  • opening
  • searching for the line ## Adding static syncthing-hosts
  • adding your host: add_syncthing_host "INTERNALHOSTNAME" "IP" "PORT" "API Key" You may address such an host by using the --host=INTERNALHOSTNAME-parameter.

Now download the template (template_syncthing.xml) and add it to your Zabbix via Configuration -> Templates -> Import. In the template directly go to the Macros-menu (well hidden as sub-tab in the first tab) and either add your Syncthing-Server-details or create a new --host-macro and edit all the items to use it.


You will realize there are two applications setup: general and folder-stats. While the items listed under general are each calling the script and directly receiving data, the folder-stats-items are slighlty more complex.

The REST-call needed to fetch those data is quite expensive (as the Syncthing-developers say). So I thought it makes sense to do it as seldom as possible. The script is called with extra-parameters to fetch the errors-key. During this call all the data-fields given as comma-seperated string with the --status=-parameter are filled with data via zabbix_sender.

You want more?

When calling the script like ./ --api-key="mykey" --folder="myfolder" --status | jq all the fields you may request are given. Feel free to change the template to fetch other values.


Screenshot / Zabbix Map with Syncthing-Hosts

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