Docker share - Archive not writable.

Hi guys 😄

I’ve been experimenting with using dat as a docker volumes replacement. It’s been working quite well 🎉 👍 Only issue I’m having is that restarting the share service gives me an error: Archive not writable, cannot use share. Please use sync to resume download..

A quick example:

/Users/asbjorn/tmp/dat-data
❯ docker run --rm -v (pwd)/html:/html -it registry.taghub:5000/dat-data:0.0.1 share /html
dat v13.8.1
Created new dat in /html/.dat
dat://3a2ec47beee3cb74d354908cb7bfe2168616d07d135c22b297251561ef9fe32d
Sharing dat: (empty archive)

1 connection | Download 0 B/s Upload 0 B/s

Watching for file updates

Exiting the Dat program...
/Users/asbjorn/tmp/dat-data
❯ docker run --rm -v (pwd)/html:/html -it registry.taghub:5000/dat-data:0.0.1 share /html
Archive not writable, cannot use share. Please use sync to resume download.

So, I’m starting the share - everything looks good, the .dat folder is created etc. However, restarting with the exact same command gives me the above error. I’m pretty sure it’s some docker permissions thing where the uid og gid mismatch or something, but I haven’t been able to pin it down. Giving the folder 777 does not seem to help.

So I’ve been wondering how this dat.writable get’s determined and if we can find a clue there somewhere. Any ideas?

To Dockerfile is just:

FROM node:8
RUN npm install -g dat
ENTRYPOINT ["dat"]

Thanks 👍

[asbjornenge]

Ah, excellent! Suspected it was something like this 😛 I managed to work around it by simply mounting /root/.dat as a volume 👍

docker run --rm -v (pwd)/html:/html -v (pwd)/dat:/root/.dat -it registry.taghub:5000/dat-data:0.0.10 dat share /html

Thanks a bunch 🎉

[joehand]

Unfortunately, looks like there isn’t an option and it isn’t quite straightforward to add. Our storage APIs are tightly coupled right now ☹️ . This’ll be a good reason to improve that though!

Opened issue in dat-storage too https://github.com/datproject/dat-storage/issues/6