wmantly
1df9916c91
ops/backup.sh snapshots Redis (BGSAVE, dynamic RDB path lookup) and ./config for standalone deployments, with retention. A background service polls GitHub releases every 24h and surfaces an admin-only banner in the UI when a newer version is published.
90 lines
3.7 KiB
Bash
Executable File
90 lines
3.7 KiB
Bash
Executable File
#!/bin/bash
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# Standalone backup for a Docker-deployed proxy (container name "proxy").
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#
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# Snapshots Redis (Host records, permissions, DNS creds, local users,
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# lua-resty-auto-ssl certs) and ./config (secrets) to ./backups/<timestamp>/,
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# then prunes old backups beyond BACKUP_KEEP.
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#
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# If you run proxy as part of the unified theta-env stack, use theta-env's
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# own setup.sh instead -- it already does this (and more) before every
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# rebuild. This script is for a standalone `docker compose up` deployment.
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#
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# Usage: ./ops/backup.sh [BACKUP_KEEP]
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# BACKUP_KEEP how many timestamped backups to retain (default 5; env var
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# of the same name also works, matching theta-env's setup.sh)
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set -euo pipefail
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CONTAINER="${CONTAINER:-proxy}"
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BACKUP_ROOT="${BACKUP_ROOT:-./backups}"
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BACKUP_KEEP="${1:-${BACKUP_KEEP:-5}}"
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info() { printf '\033[1;34m[backup]\033[0m %s\n' "$*"; }
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warn() { printf '\033[1;33m[backup]\033[0m %s\n' "$*" >&2; }
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die() { printf '\033[1;31m[backup]\033[0m %s\n' "$*" >&2; exit 1; }
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command -v docker >/dev/null || die "docker not found"
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docker inspect "$CONTAINER" >/dev/null 2>&1 || die "container '$CONTAINER' not found -- is the stack running? (docker compose up -d)"
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ts="$(date -u +%Y%m%dT%H%M%SZ)"
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dest="${BACKUP_ROOT}/${ts}"
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mkdir -p "$dest"
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chmod 700 "$dest"
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info "Snapshotting Redis (BGSAVE)..."
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# Capture LASTSAVE *before* issuing BGSAVE: a small dataset finishes in well
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# under a second, so capturing it afterward races the save and the poll below
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# can miss the update entirely (looks like "BGSAVE never finished" when it
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# actually finished immediately).
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before="$(docker exec "$CONTAINER" redis-cli LASTSAVE 2>/dev/null | tr -dc '0-9' || echo 0)"
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docker exec "$CONTAINER" redis-cli BGSAVE >/dev/null 2>&1 || true
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ok=0
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for _ in $(seq 1 10); do
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after="$(docker exec "$CONTAINER" redis-cli LASTSAVE 2>/dev/null | tr -dc '0-9' || echo 0)"
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if [ "${after:-0}" -gt "${before:-0}" ]; then ok=1; break; fi
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sleep 1
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done
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if [ "$ok" != "1" ]; then
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# BGSAVE didn't advance LASTSAVE in time (fork failure, or a save already
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# in progress) -- fall back to a synchronous SAVE. Reply must be "OK".
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info "BGSAVE didn't complete in time -- falling back to a synchronous SAVE."
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[ "$(docker exec "$CONTAINER" redis-cli SAVE 2>/dev/null | tr -d '\r\n')" = "OK" ] && ok=1
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fi
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if [ "$ok" = "1" ]; then
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# Ask Redis where it actually wrote the RDB rather than assuming /data --
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# works regardless of the container's working directory.
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rdir="$(docker exec "$CONTAINER" redis-cli CONFIG GET dir 2>/dev/null | sed -n '2p' | tr -d '\r\n')"
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rfile="$(docker exec "$CONTAINER" redis-cli CONFIG GET dbfilename 2>/dev/null | sed -n '2p' | tr -d '\r\n')"
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rpath="${rdir:+$rdir/}${rfile:-dump.rdb}"
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if docker cp "${CONTAINER}:${rpath}" "${dest}/proxy.rdb" >/dev/null 2>&1; then
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info " -> ${dest}/proxy.rdb"
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else
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warn " could not copy ${rpath} from the container -- Redis not snapshotted"
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fi
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else
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warn " Redis snapshot failed -- not included in this backup"
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fi
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if [ -d ./config ]; then
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info "Copying ./config..."
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cp -a ./config "${dest}/config"
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info " -> ${dest}/config"
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else
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warn "No ./config directory found here -- skipping (secrets aren't managed from this path?)."
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fi
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if [ -n "${BACKUP_KEEP}" ] && [ "${BACKUP_KEEP}" -gt 0 ] 2>/dev/null; then
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info "Pruning old backups, keeping the newest ${BACKUP_KEEP}..."
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# Newest-first, drop everything after the Nth.
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# shellcheck disable=SC2012
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ls -1dt "${BACKUP_ROOT}"/*/ 2>/dev/null | tail -n "+$((BACKUP_KEEP + 1))" | while read -r old; do
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[ -L "${old%/}" ] && continue
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info " removing ${old}"
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rm -rf "${old}"
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done
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fi
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info "Done: ${dest}"
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info "Store this off-host -- it contains the OIDC client secret, LDAP bind password, and Let's Encrypt account state."
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