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scripts/deploy.sh: one-command tag-based deploy with pre-flight backup + verify (#115)
Codifies the previously-manual tag-based deploy of central on CT 104. Performs pre-flight drift check, mandatory pg_dump, detached-HEAD checkout + uv sync, interactive confirm, migration apply, service restart, and health-check verify. ERR trap prints rollback instructions. Co-authored-by: Ubuntu <zvx@cortex.echo6.co> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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scripts/deploy.sh
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scripts/deploy.sh
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#!/usr/bin/env bash
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# deploy.sh — tag-based deploy for the central service on CT 104
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#
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# Usage: deploy.sh <tag-or-ref> [-y|--yes]
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#
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# Must run on CT 104 as a sudo-capable user (e.g. zvx).
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# Performs a detached-HEAD checkout of <tag-or-ref>, syncs the uv venv,
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# runs a pre-flight migration drift check, takes a pg_dump backup, runs
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# migrations, restarts all three systemd units, and verifies health.
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#
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# One-time cutover steps (e.g. EONET region-key removal) are NOT handled
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# here — see the vault runbook central-deploy-cutover.md.
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#
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# Bootstrap caveat: the very first deploy that introduces this script is
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# still manual (the script ships inside the repo it deploys).
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set -euo pipefail
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# ---------------------------------------------------------------------------
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# Config
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# ---------------------------------------------------------------------------
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DEPLOY_DIR=/opt/central
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VENV="$DEPLOY_DIR/.venv"
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CENTRAL_USER=central
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UV=/usr/local/bin/uv
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BACKUP_DIR=/var/backups/central
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UNITS=(central-supervisor central-archive central-gui)
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# ---------------------------------------------------------------------------
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# Helpers
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# ---------------------------------------------------------------------------
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log() {
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echo ""
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echo "==> $*"
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}
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die() {
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echo "ERROR: $*" >&2
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exit 1
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}
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# Run a command as $CENTRAL_USER via sudo.
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cen() {
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sudo -u "$CENTRAL_USER" "$@"
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}
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# ---------------------------------------------------------------------------
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# ERR trap — fired on any unhandled non-zero exit inside set -e
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# ---------------------------------------------------------------------------
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on_error() {
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local exit_code=$?
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echo "" >&2
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echo "================================================================" >&2
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echo " DEPLOY FAILED (exit $exit_code)" >&2
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echo "================================================================" >&2
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echo "" >&2
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echo " ROLLBACK GUIDE:" >&2
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echo "" >&2
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echo " 1. Checkout the previously-deployed ref:" >&2
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echo " sudo -u $CENTRAL_USER git -C $DEPLOY_DIR checkout ${PREV_REF:-<unknown>}" >&2
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echo " sudo -u $CENTRAL_USER bash -c \"cd $DEPLOY_DIR && $UV sync\"" >&2
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echo " sudo systemctl restart ${UNITS[*]}" >&2
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echo "" >&2
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echo " 2. DB rollback (migrations are forward-only, no down-scripts):" >&2
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echo " The ONLY automated DB rollback is the pg_dump taken before deploy." >&2
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if [[ -n "${DUMP:-}" ]]; then
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echo " Dump path: $DUMP" >&2
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echo " Restore: sudo -u $CENTRAL_USER pg_restore -d central -Fc --clean '$DUMP'" >&2
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else
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echo " (Dump was not yet created — no DB changes were made.)" >&2
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fi
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echo "" >&2
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echo "================================================================" >&2
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}
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trap on_error ERR
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# ---------------------------------------------------------------------------
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# Parse arguments
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# ---------------------------------------------------------------------------
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REF=""
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SKIP_CONFIRM=0
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for arg in "$@"; do
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case "$arg" in
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-y|--yes)
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SKIP_CONFIRM=1
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;;
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-h|--help)
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echo "Usage: $0 <tag-or-ref> [-y|--yes]"
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echo " <tag-or-ref> Git tag, branch, or commit to deploy."
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echo " -y / --yes Skip interactive confirmation prompt."
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exit 0
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;;
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-*)
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die "Unknown option: $arg"
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;;
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*)
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if [[ -z "$REF" ]]; then
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REF="$arg"
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else
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die "Unexpected argument: $arg"
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fi
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;;
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esac
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done
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if [[ -z "$REF" ]]; then
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echo "Usage: $0 <tag-or-ref> [-y|--yes]" >&2
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exit 2
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fi
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# ---------------------------------------------------------------------------
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# PREFLIGHT
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# ---------------------------------------------------------------------------
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log "PREFLIGHT"
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# 1. Verify DEPLOY_DIR is a git repo.
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[[ -d "$DEPLOY_DIR/.git" ]] \
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|| die "$DEPLOY_DIR/.git not found — is this the right deploy directory?"
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# 2. Capture current ref for rollback messaging.
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PREV_REF="$(cen git -C "$DEPLOY_DIR" describe --tags --always 2>/dev/null || echo unknown)"
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log "Currently deployed: $PREV_REF → deploying: $REF"
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# 3. Report unit status (warn, don't die — a redeploy may be fixing unhealthy units).
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log "Current service status"
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for unit in "${UNITS[@]}"; do
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status="$(systemctl is-active "$unit" 2>/dev/null || true)"
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if [[ "$status" != "active" ]]; then
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echo " WARNING: $unit is $status (will attempt restart anyway)"
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else
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echo " $unit: $status"
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fi
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done
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# 4. Migration drift gate — refuse to deploy onto a drifted migration state.
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log "Migration drift check (--check)"
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cen "$VENV/bin/central-migrate" --check \
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|| die "Migration drift detected (central-migrate --check exited non-zero). Resolve drift before deploying."
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# 5. Ensure backup directory exists and is owned by $CENTRAL_USER.
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log "Ensuring backup directory: $BACKUP_DIR"
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sudo mkdir -p "$BACKUP_DIR"
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sudo chown "$CENTRAL_USER:$CENTRAL_USER" "$BACKUP_DIR"
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# 6. Take a pre-deploy pg_dump backup.
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TS="$(date -u +%Y%m%dT%H%M%SZ)"
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# Sanitise REF for use in a filename (replace / and : with _).
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REF_SAFE="${REF//\//_}"
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REF_SAFE="${REF_SAFE//:/_}"
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DUMP="$BACKUP_DIR/central-pre-${REF_SAFE}-${TS}.pgdump"
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log "Taking pre-deploy backup: $DUMP"
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# Run as $CENTRAL_USER so the file is owned by that user; redirect inside sudo.
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cen bash -c "pg_dump -Fc central > '$DUMP'"
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# Verify the dump is non-empty (>1 KB sanity check).
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if [[ ! -f "$DUMP" ]]; then
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die "Dump file was not created: $DUMP"
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fi
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dump_size="$(stat -c%s "$DUMP" 2>/dev/null || stat -f%z "$DUMP" 2>/dev/null || echo 0)"
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if [[ "$dump_size" -lt 1024 ]]; then
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die "Dump file is suspiciously small (${dump_size} bytes): $DUMP — aborting."
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fi
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echo " Backup written: $DUMP (${dump_size} bytes)"
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# 7. Prune old backups — keep the 10 newest central-pre-*.pgdump files.
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log "Pruning old backups (keep 10 newest)"
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# ls -t lists newest first; tail -n +11 skips the 10 newest → these are the old ones.
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old_backups="$(ls -t "$BACKUP_DIR"/central-pre-*.pgdump 2>/dev/null | tail -n +11 || true)"
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if [[ -n "$old_backups" ]]; then
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echo "$old_backups" | while IFS= read -r f; do
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echo " Removing old backup: $f"
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rm -f "$f"
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done
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else
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echo " No old backups to prune."
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fi
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# ---------------------------------------------------------------------------
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# DEPLOY
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# ---------------------------------------------------------------------------
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log "DEPLOY"
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# 8. Fetch latest tags and refs from origin.
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log "Fetching from origin (tags)"
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cen git -C "$DEPLOY_DIR" fetch origin --tags
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# 9. Verify the requested ref resolves to a commit (fail fast with a clear message).
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log "Resolving ref: $REF"
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cen git -C "$DEPLOY_DIR" rev-parse --verify "${REF}^{commit}" > /dev/null \
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|| die "Ref '$REF' does not resolve to a commit. Check the tag/branch name and try again."
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# 10. Checkout the ref as a detached HEAD (standard deploy mode).
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log "Checking out: $REF"
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cen git -C "$DEPLOY_DIR" checkout "$REF"
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# 11. Sync the venv against the checked-out lockfile (uv respects uv.lock).
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log "Syncing venv (uv sync)"
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cen bash -c "cd '$DEPLOY_DIR' && '$UV' sync"
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# 12. Migration preview — show what would run without applying.
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log "Migration dry-run (preview)"
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cen "$VENV/bin/central-migrate" --dry-run
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# 13. CONFIRM gate — unless -y was passed.
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#
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# NOTE: At this point the code and venv are already updated to the new ref,
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# but services have NOT been restarted and migrations have NOT been applied.
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# If the operator aborts here, the new code is staged on disk but production
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# is still running the old code. To return to a clean state manually:
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# sudo -u central git -C /opt/central checkout <previous-ref>
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# sudo -u central bash -c "cd /opt/central && /usr/local/bin/uv sync"
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if [[ "$SKIP_CONFIRM" -eq 0 ]]; then
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echo ""
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read -r -p "Apply migrations and restart services? [y/N] " confirm < /dev/tty
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if [[ "$confirm" != "y" && "$confirm" != "Y" ]]; then
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echo ""
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echo "Aborted by operator."
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echo ""
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echo " Code and venv are now at: $REF"
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echo " Services are still running: $PREV_REF"
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echo " Migrations have NOT been applied."
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echo ""
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echo " To stage-abort cleanly (revert code on disk):"
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echo " sudo -u $CENTRAL_USER git -C $DEPLOY_DIR checkout $PREV_REF"
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echo " sudo -u $CENTRAL_USER bash -c \"cd $DEPLOY_DIR && $UV sync\""
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exit 0
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fi
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fi
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# 14. Apply migrations.
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log "Applying migrations"
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cen "$VENV/bin/central-migrate"
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# 15. Restart all three systemd units.
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log "Restarting services"
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sudo systemctl restart "${UNITS[@]}"
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# ---------------------------------------------------------------------------
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# VERIFY
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# ---------------------------------------------------------------------------
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log "VERIFY"
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# 16. Confirm all units are active after restart.
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log "Checking unit status"
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failed_units=()
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for unit in "${UNITS[@]}"; do
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status="$(systemctl is-active "$unit" 2>/dev/null || true)"
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echo " $unit: $status"
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if [[ "$status" != "active" ]]; then
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failed_units+=("$unit")
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fi
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done
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if [[ "${#failed_units[@]}" -gt 0 ]]; then
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die "Unit(s) not active after restart: ${failed_units[*]}"
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fi
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# 17. Post-deploy migration check — should be clean (0 pending).
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log "Post-deploy migration check (--check)"
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cen "$VENV/bin/central-migrate" --check \
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|| die "Post-deploy migration check failed — schema may be inconsistent."
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# 18. Health check — up to 5 retries with 2-second sleep between attempts.
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log "Health check: http://localhost:8000/health"
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HEALTH_OK=0
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for attempt in 1 2 3 4 5; do
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http_status="$(curl -sf -o /dev/null -w "%{http_code}" http://localhost:8000/health 2>/dev/null || true)"
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if [[ "$http_status" == "200" ]]; then
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echo " Attempt $attempt: HTTP $http_status — OK"
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HEALTH_OK=1
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break
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else
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echo " Attempt $attempt: HTTP ${http_status:-no-response} — retrying in 2s..."
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sleep 2
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fi
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done
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if [[ "$HEALTH_OK" -eq 0 ]]; then
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die "Health check failed after 5 attempts (http://localhost:8000/health did not return 200)."
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fi
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# ---------------------------------------------------------------------------
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# SUCCESS
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# ---------------------------------------------------------------------------
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DEPLOYED_DESC="$(cen git -C "$DEPLOY_DIR" describe --tags --always 2>/dev/null || echo "$REF")"
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echo ""
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echo "================================================================"
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echo " SUCCESS"
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echo "================================================================"
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echo " Deployed: $DEPLOYED_DESC"
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echo " Previous: $PREV_REF"
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echo " Pre-deploy backup: $DUMP"
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echo ""
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echo " REMINDER: one-time cutover steps (e.g. EONET region-key removal)"
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echo " are NOT performed by this script. See vault runbook:"
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echo " central-deploy-cutover.md"
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echo "================================================================"
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