feat: zero downtime lightship on hasura branch

.kontinuous/values.yaml

@@ -17,7 +17,18 @@ app:
  host: "{{.Values.global.host}}"
  imagePackage: app
  containerPort: 3000
- probesPath: "/healthz"
+ livenessProbe:
+ httpGet:
+ path: /live
+ port: 9000
+ startupProbe:
+ httpGet:
+ path: /live
+ port: 9000
+ readinessProbe:
+ httpGet:
+ path: /ready
+ port: 9000
  envFrom:
  - configMapRef:
  name: app

Dockerfile

@@ -47,4 +47,6 @@ COPY --from=builder --chown=node:node /app/.next ./.next
 
 USER 1001
 
-CMD ["yarn", "start"]
+ENV NEXT_MANUAL_SIG_HANDLE=true
+
+CMD ["node_modules/next/dist/bin/next"]

package.json

@@ -38,6 +38,7 @@
  "@sentry/nextjs": "^7.60.1",
  "@socialgouv/matomo-next": "^1.6.1",
  "dayjs": "^1.11.9",
+ "lightship": "^9.0.2",
  "next": "13.4.12",
  "next-auth": "^4.22.3",
  "react": "18.2.0",

src/lib/graceful-shutdown.ts

@@ -0,0 +1,6 @@
+import { createLightship } from "lightship";
+
+export default async function handleGracefulShutdown() {
+ const lightship = await createLightship();
+ lightship.signalReady();
+}

src/pages/_document.tsx

@@ -1,4 +1,5 @@
 import { Html, Head, Main, NextScript, DocumentProps } from "next/document";
+import handleGracefulShutdown from "../lib/graceful-shutdown";
 import { dsfrDocumentApi, augmentDocumentWithEmotionCache } from "./_app";
 
 const { getColorSchemeHtmlAttributes, augmentDocumentForDsfr } =
@@ -26,3 +27,5 @@ export default function Document(props: DocumentProps) {
 augmentDocumentForDsfr(Document);
 
 augmentDocumentWithEmotionCache(Document);
+
+handleGracefulShutdown();