Hetzner: Migration of Image Archive Compression Format to zstd
Timeline of updates
- investigating
Start: 2026-06-12T12:00:00+00:00
As part of our ongoing optimization efforts, we are migrating the compression format of our image archives from tar.gz to tar.zst (zstd) to significantly reduce installation times. The file extension of the archives has changed accordingly.
If you are operating an automated installation environment and reusing existing installimage configurations, we kindly ask you to review the respective IMAGE parameter and update the file extension to reflect the new tar.zst format.
Changes Rewindex caught on this incident
Archive proof
Rewindex commits each version of an incident it captures to a daily checkpoint, chains it to the day before, and has the checkpoint timestamped by FreeTSA and DigiCert. That proves these records existed by then and have not been changed since, by anyone, Rewindex included.
How the archive is checked, and what it cannot prove.
First version captured
In the 2026-10-22 checkpoint, timestamped by FreeTSA and DigiCert on . Record hash
66dc0d1e5a716e46…Version 2 captured
In the 2026-10-22 checkpoint, timestamped by FreeTSA and DigiCert on . Record hash
c0a93f200cefab2a…
Impact, status and times are the vendor’s own, as last archived. View on status.hetzner.com (opens in new tab).
Cite this
Status incident (vendor impact label: minor) posted by Hetzner, started 2026-06-12 12:00 UTC, not resolved, 1 update(s); edited after publishing.
- Title
- Migration of Image Archive Compression Format to zstd
- Vendor
- Hetzner
- Date
- URL
- https://rewindex.com/company/hetzner/incidents/a96d2977-baca-4ad5-92e8-7391d4efe91e
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