Next.js
The AppSignal integration for Next.js.
To report both back-end traces and front-end errors, it is recommended to use @appsignal/nodejs
in combination with @appsignal/javascript
and @appsignal/react
on the client-side for full-stack performance monitoring and error tracking.
Installation
First, follow the @appsignal/nodejs
installation instructions.
Then, modify your Next project's next.config.js
configuration file in order to enable instrumentation hooks:
const nextConfig = { // Add the `experimental` object if not present experimental: { // Add the following line inside the object instrumentationHook: true, }, };
Then, add the following file to the root of your Next.js project as instrumentation.js
:
export function register() { if (process.env.NEXT_RUNTIME === "nodejs") { require("./appsignal.cjs"); } }
The instrumentation hook file references the appsignal.cjs
file that was created by the AppSignal installer or when configuring AppSignal manually. Make sure that the appsignal.cjs
file is in the same folder as the instrumentation.js
file, or adjust the path of the require
in the instrumentation.js
file accordingly.
Finally, modify your appsignal.cjs
configuration file in order to disable the HTTP instrumentation, which would otherwise generate redundant traces:
new Appsignal({ // Add the `disableDefaultInstrumentations` list if not present disableDefaultInstrumentations: [ // Add the following line inside the list "@opentelemetry/instrumentation-http", ], });
Features
The Next.js integration will send AppSignal a trace for each request.
Within each trace, the event timeline will show spans for the time taken to render the document, get server-side props, run the route handler or perform HTTP requests using fetch
.
Standalone output
No data may be reported when Next.js is configured with output: "standalone"
in next.config.js
. When Next.js optimizes its app size to only include what is used by the app, it omits the AppSignal extension and agent, which report the data to our servers.
When using the Next.js "with-docker" starter, specifically the Dockerfile, a modification is required to make sure the AppSignal extension and agent are included in the production Docker image.
Add the following line to your Dockerfile
, after similar COPY
lines near the end of the file:
# Dockerfile COPY --from=builder --chown=nextjs:nodejs /app/node_modules/@appsignal/nodejs ./node_modules/@appsignal/nodejs
The change in Git will look something like this, but your Dockerfile may be slightly different:
--- Dockerfile +++ Dockerfile @@ -48,6 +48,7 @@ COPY --from=builder /app/public ./public # https://nextjs.org/docs/advanced-features/output-file-tracing COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./ COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static +COPY --from=builder --chown=nextjs:nodejs /app/node_modules/@appsignal/nodejs ./node_modules/@appsignal/nodejs USER nextjs