59 lines
2.3 KiB
Bash
59 lines
2.3 KiB
Bash
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#!/usr/bin/env bash
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## ols-htaccess-watcher.sh — graceful-restart the shared OLS when any tenant's
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## .htaccess changes. OLS reads .htaccess (RewriteFile) at (re)start, NOT per
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## request, so without this a WordPress permalink/LiteSpeed-Cache change would
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## silently not take effect. Required by spec 5.3.
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##
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## Watches all docroots for .htaccess writes, COALESCES bursts (a WP plugin save
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## touches the file several times) within a debounce window, and RATE-LIMITS to
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## a floor (one restart per FLOOR seconds) so many tenants saving at once can't
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## trigger a restart storm. Debounce/floor are env-tunable (panel discloses the
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## resulting "~60s" window to customers).
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##
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## Failure of THIS process is the silent-ticket failure mode (spec 7): if it
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## dies, tenants' rewrite changes stop applying with no error. The entrypoint
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## runs it and the panel monitors it (check-ols-htaccess-watcher.php).
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set -uo pipefail
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WATCH_ROOT="${OLS_WATCH_ROOT:-/mnt/users}"
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DEBOUNCE="${OLS_HTACCESS_DEBOUNCE:-15}" # coalesce window (s)
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FLOOR="${OLS_HTACCESS_FLOOR:-60}" # min seconds between restarts
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LSWSCTRL=/usr/local/lsws/bin/lswsctrl
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last_restart=0
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log() { echo "ols-htaccess-watcher: $*" >&2; }
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do_restart() {
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now=$(date +%s)
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if [ $((now - last_restart)) -lt "$FLOOR" ]; then
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log "within ${FLOOR}s floor — coalescing, skipping restart"
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return
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fi
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if "$LSWSCTRL" restart >/dev/null 2>&1; then
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last_restart=$now
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log "graceful restart issued (.htaccess change)"
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else
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log "WARNING: lswsctrl restart failed"
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fi
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}
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if ! command -v inotifywait >/dev/null 2>&1; then
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log "FATAL: inotifywait not installed (inotify-tools)"; exit 1
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fi
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mkdir -p "$WATCH_ROOT"
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log "watching $WATCH_ROOT for .htaccess changes (debounce=${DEBOUNCE}s floor=${FLOOR}s)"
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## -m monitor, -r recursive. We filter to .htaccess in the read loop rather than
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## --include so this works on older inotify-tools too. modify/create/delete/move
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## all matter (delete of .htaccess also changes rewrite behavior).
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inotifywait -m -r -e modify,create,delete,move "$WATCH_ROOT" --format '%f' 2>/dev/null |
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while read -r fname; do
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case "$fname" in
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.htaccess) ;;
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*) continue ;;
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esac
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## Drain further events for DEBOUNCE seconds (coalesce the burst), then act.
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while read -r -t "$DEBOUNCE" _; do :; done
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do_restart
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done
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