73 lines
1.8 KiB
Bash
73 lines
1.8 KiB
Bash
#!/bin/sh
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# После recreate edge-сервисов Docker выдаёт новый IP; без reload nginx шлёт на старый адрес → 502.
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set -eu
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WATCH_INTERVAL="${IDP_NGINX_WATCH_INTERVAL:-5}"
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WATCH_HOSTS="${IDP_NGINX_WATCH_HOSTS:-lendry-id-api-gateway:3000/health lendry-id-frontend:3000/}"
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log() {
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echo "[idp-nginx-watch] $*"
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}
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probe_url() {
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target="$1"
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host="${target%%:*}"
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rest="${target#*:}"
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port="${rest%%/*}"
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path="/${rest#*/}"
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[ "$path" = "/${rest}" ] && path="/"
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wget -qO- --timeout=3 "http://${host}:${port}${path}" 2>/dev/null | head -c 64 | grep -q .
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}
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wait_for_upstreams() {
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attempt=0
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while [ "$attempt" -lt 120 ]; do
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ok=1
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for target in $WATCH_HOSTS; do
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if ! probe_url "$target"; then
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ok=0
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break
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fi
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done
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if [ "$ok" -eq 1 ]; then
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log "upstream-ы доступны"
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return 0
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fi
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attempt=$((attempt + 1))
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sleep 1
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done
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log "WARN: не все upstream-ы ответили за 120с — nginx стартует без ожидания"
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return 0
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}
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watch_upstreams() {
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last_ips=""
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while true; do
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sleep "$WATCH_INTERVAL"
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reload=0
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current_ips=""
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for target in $WATCH_HOSTS; do
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host="${target%%:*}"
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ip="$(getent hosts "$host" 2>/dev/null | awk '{print $1}' | head -n1 || true)"
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current_ips="${current_ips}${host}=${ip};"
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if ! probe_url "$target"; then
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log "${host} недоступен — reload nginx"
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reload=1
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break
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fi
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done
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if [ "$reload" -eq 0 ] && [ -n "$last_ips" ] && [ "$current_ips" != "$last_ips" ]; then
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log "IP upstream изменился — reload nginx"
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reload=1
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fi
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if [ "$reload" -eq 1 ]; then
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nginx -s reload 2>/dev/null || true
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fi
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last_ips="$current_ips"
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done
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}
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wait_for_upstreams
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watch_upstreams &
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