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fix(init-bedrock): overwrite a leftover snapshot archive on retry #99

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fix(init-bedrock): overwrite a leftover snapshot archive on retry #99

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9a9fca3
fix(init-bedrock): overwrite a leftover snapshot archive on retry
furkan3152 Nov 2, 2026
e6f95c5
docs: describe snapshot retry after a checksum failure
furkan3152 Nov 2, 2026
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6 changes: 4 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -371,8 +371,10 @@ If image pulls or snapshot downloads fail, make sure the host can reach:

If `bedrock-init` exits with `Unexpected checksum file format`,
`Checksum file does not match downloaded archive`, or `SHA256 verification
failed`, do not reuse that download. Retry later or verify the checksum
yourself before attempting another restore.
failed`, retry later: the next run downloads the snapshot again and replaces
the failed archive. Archives named like `snapshot.tar.1.zst`, left by runs
before this behaviour, stay in the `snapshot_downloads` volume until you remove
them (for example with `docker compose down -v`).

### Snapshot sources

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10 changes: 9 additions & 1 deletion scripts/utils.sh
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Expand Up @@ -31,13 +31,21 @@ function extractlz4() {
# Arguments:
# url: URL of the file to download.
# out: Location to download the file to.
#
# A file left at `out` by an earlier failed run (for example after a checksum
# mismatch or an interrupted extraction) must be replaced, not kept: by default
# aria2c saves the new download as "<name>.1.<ext>" and the caller would go on
# to verify and extract the stale file. An unfinished download that still has
# its .aria2 control file is resumed as before.
function download() {
local out_dir out_name
out_dir="$(dirname "$2")"
out_name="$(basename "$2")"

mkdir -p "$out_dir"
aria2c --max-tries=0 -x 16 -s 16 -k100M --dir="$out_dir" --out="$out_name" "$1"
aria2c --max-tries=0 -x 16 -s 16 -k100M \
--allow-overwrite=true --auto-file-renaming=false \
--dir="$out_dir" --out="$out_name" "$1"
}

# verify_sha256_checksum: Verifies a downloaded file against a checksum file.
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