52 lines
1.7 KiB
Bash
Executable File
52 lines
1.7 KiB
Bash
Executable File
#!/bin/bash
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# secrets-issuance backup — snapshot the per-client age keys + denylist +
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# admin token to /mnt/library so they survive an LXC-105-only failure.
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#
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# Destination is under /mnt/library/.secrets-issuance-backup/ (dot-prefix to
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# stay out of any indexer's path). Mode 0700 root-owned. Privileged LXCs
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# that mount /mnt/library would still be able to read it as their root maps
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# to host root — accept that trade today; an encrypted-tarball variant
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# (separate offline age key) is a follow-up if the LAN trust model changes.
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#
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# Retention: 14 daily snapshots. Each snapshot is the WHOLE /var/lib/
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# secrets-issuance directory (small — ~few KiB per client), so restore is
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# just `tar xf <snap> -C /`.
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set -euo pipefail
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SRC=/var/lib/secrets-issuance
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DEST=/mnt/library/.secrets-issuance-backup
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RETAIN=14
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if [ ! -d "$SRC" ]; then
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echo "[backup] source $SRC missing — nothing to do" >&2
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exit 0
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fi
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if [ ! -d /mnt/library ]; then
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echo "[backup] /mnt/library not mounted — can't write backup" >&2
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exit 1
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fi
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install -d -m 0700 "$DEST"
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chown root:root "$DEST"
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stamp=$(date +%Y%m%d-%H%M%S)
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out="$DEST/secrets-issuance-$stamp.tar.gz"
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# Include the admin token too (recoverable separately, but trivial size and
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# saves a step when restoring after total LXC 105 loss).
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tar czf "$out" \
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-C / \
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var/lib/secrets-issuance \
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$([ -f /etc/secrets-issuance/admin-token ] && echo etc/secrets-issuance/admin-token || true)
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chmod 0600 "$out"
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# Drop oldest beyond retention.
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ls -1t "$DEST"/secrets-issuance-*.tar.gz 2>/dev/null \
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| tail -n +$((RETAIN + 1)) \
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| xargs -r rm -f
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count=$(ls -1 "$DEST"/secrets-issuance-*.tar.gz 2>/dev/null | wc -l)
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size=$(du -sh "$out" | cut -f1)
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echo "[backup] wrote $out ($size); kept $count snapshots"
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