Make logging directory configurable

[crimeminister]

In the process of configuring systemd to run iroh, I am attempting to use a "dynamic user" to run the service. This effectively sandboxes the service by making the full filesystem read-only except for a specific "state directory" (/var/lib/iroh in my configuration). When attempting to run the service with this configuration I see the error:

Error: failed to create log directory: Read-only file system (os error 30)

I would like to configure iroh to write logs to /var/log/iroh, which I will make writable by the systemd "dynamic user" that ends up running the service. Would it be possible to expose the log output directory as a configuration knob?

[divagant-martian]

@crimeminister please give #2391 a go if you have the bandwidth to do so

[matheus23]

Do we know if there's other files read/written from iroh with non-configurable locations? We'd need to make sure everything is configurable to solve OP's use-case IIUC.

[dignifiedquire]

Do we know if there's other files read/written from iroh with non-configurable locations?

All other files should be written into the main iroh folder, which is a single configurable place. I am surprised our logs don't go in there by default

[divagant-martian]

our logs go in the iroh folder. The use case here is that he wants logs to go somewhere else instead, different to the iroh folder (/var/lib/iroh, and /var/log/iroh)

[crimeminister]

Thanks for this, everyone! I appreciate the quick and helpful response.