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Author Notes

Testing snapshot creating of big volumes

docker run --rm -it -v big-volume:/data alpine sh

Create 10 files, each 2GB (change count to control size)

for i in $(seq 1 10); do dd if=/dev/zero of=/data/file_$i bs=1M count=2024; done

docker run --rm -v big-volume:/data alpine ls -lh /data

Creating a snapshot of a volume sized 20GB, dvs took 2-3 mins (although the stat can be highly wrong)

real    2m8.993s
user    0m0.009s
sys     0m0.016s

Restoring the same to a fresh volume took 1-2 mins

real    1m55.040s
user    0m0.010s
sys     0m0.018s

Securing snapshots with gpg (OpenPGP)

Encrypt

gpg --batch --yes --passphrase "12345" \
    --pinentry-mode loopback \
    --cipher-algo AES256 \
    --symmetric \
    --output big-volume.tar.gz.gpg \
    big-volume.tar.gz

Decrypt

gpg --batch --yes --passphrase "12345" \
    --pinentry-mode loopback \
    --output big-volume.tar.gz \
    --decrypt big-volume.tar.gz.gpg

Securing snapshots with age

https://github.com/FiloSottile/age