GS doesn't check rsync is installed on remote host

[bertiewils]

Describe the Issue
Rsync is required on both the hosts in order to function.
GS only checks it is installed on the local machine.

After running through the configuration rsync is installed on the local machine if needed, but running a test 'pull' resulted in the following for me;

bert@DNS2:~/gravity-sync $ ./gravity-sync.sh pull
[ INFO ] Gravity Sync 2.0.0 Executing
[  OK  ] Evaluating Arguments: PULL Requested
[  OK  ] Importing gravity-sync.conf Settings
[ INFO ] Targeting ansible@dns1.lan
[  OK  ] Validating SSH Client on DNS2.lan (OpenSSH)
[  OK  ] Validating RSYNC Installed on DNS2.lan
[  OK  ] Validating Gravity Sync Folders on DNS2.lan
[  OK  ] Validating Pi-hole Configuration on DNS2.lan
[ INFO ] Using SSH Key-Pair Authentication
[  OK  ] Validating Connection to dns1.lan
[  OK  ] Analyzing gravity.db on dns1.lan
[  OK  ] Analyzing gravity.db on DNS2.lan
[ WARN ] Differenced gravity.db Detected
[  OK  ] Analyzing custom.list on dns1.lan
[  OK  ] Analyzing custom.list on DNS2.lan
[ WARN ] Differenced custom.list Detected
[ WARN ] Replication Required
[  OK  ] Backing Up gravity.db on DNS2.lan
[ FAIL ] Pulling gravity.db from dns1.lan

After that fail I checked the logs but nothing had been written yet;

bert@DNS2:~/gravity-sync $ ./gravity-sync.sh logs
[ INFO ] Gravity Sync 2.0.0 Executing
[  OK  ] Evaluating Arguments: LOGS Requested
[  OK  ] Importing gravity-sync.conf Settings
[ INFO ] Targeting ansible@dns1.lan
[  OK  ] Validating SSH Client on DNS2.lan (OpenSSH)
[  OK  ] Validating RSYNC Installed on DNS2.lan
[ INFO ] Tailing /home/bert/gravity-sync/gravity-sync.log
========================================================
Recent Complete SMART Executions
tail: cannot open '/home/bert/gravity-sync/gravity-sync.log' for reading: No such file or directory
Recent Complete PULL Executions
tail: cannot open '/home/bert/gravity-sync/gravity-sync.log' for reading: No such file or directory
Recent Complete PUSH Executions
tail: cannot open '/home/bert/gravity-sync/gravity-sync.log' for reading: No such file or directory
Recent Complete RESTORE Executions
tail: cannot open '/home/bert/gravity-sync/gravity-sync.log' for reading: No such file or directory
========================================================
[ INFO ] Gravity Sync LOGS Aborting (0 seconds)

Manually installing rsync on the remote host resolved this.

It would be good during the configuration checks for GS to validate rsync is installed on the remote host, and have some error logging that indicates such issues.

Cheers

[vmstan]

Interesting. I’ll work on getting the check added during configuration. Curious, what distro are you running on the primary that doesn’t include it? Dietpi?

[bertiewils]

The primary is running plain old Debian 10 as a VM.

The secondary is DietPi.

[Panja0]

I can confirm this was the case on my setup as well.

Debian 10 VM's on VMware ESXi.

[vmstan]

This will be on 2.0.2 coming shortly.

I couldn't get it to reliably remote run the hash command that I use to locally check if rsync is installed, so I just create a dummy file on the primary Pi-hole in the home directory, and then pull it over to the secondary, and then delete both of them.