fix: Load instrumentation-node ahead of time

[zacharyblasczyk]

Summary by CodeRabbit

• Chores
  • Updated the container startup to automatically load an enhancement module for a smoother initialization.
  • Removed a redundant manual initialization step, streamlining the startup process.

[coderabbitai]

Walkthrough

The changes update the Node process startup and instrumentation initialization for the event-worker. In the Dockerfile, the startup command now preloads an instrumentation module before executing the main application. Concurrently, the manual instrumentation registration in the main application (index.ts) has been removed, shifting the initialization responsibilities entirely to the module loaded via the command-line flag.

Changes

File(s)	Change Summary
apps/event-worker/Dockerfile	Updated the container start command to include the -r flag, preloading the instrumentation module (instrumentation-node.js) before running the main application script.
apps/event-worker/src/index.ts	Removed the import and invocation of the register function for instrumentation, eliminating manual instrumentation registration during the application startup.

Sequence Diagram(s)

sequenceDiagram
    participant D as Docker Container
    participant N as Node Process
    participant I as Instrumentation Module
    participant A as Main App (index.js)

    D->>N: Execute CMD with "-r ./instrumentation-node.js"
    N->>I: Preload instrumentation module
    I-->>N: Initialize instrumentation setup
    N->>A: Launch main application script

Loading

Poem

I'm a bunny with ears so keen,
Spotting changes fresh and new.
Preloading magic makes it clean,
No more manual calls to do.
Hoppin' along with a joyful hue 🐰✨!
Cheers to a code garden that’s brighter too!

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📥 Commits

Reviewing files that changed from the base of the PR and between f331a2b and e4077bc.

📒 Files selected for processing (2)

• apps/event-worker/Dockerfile (1 hunks)
• apps/event-worker/src/index.ts (0 hunks)

💤 Files with no reviewable changes (1)

• apps/event-worker/src/index.ts

⏰ Context from checks skipped due to timeout of 90000ms (3)

• GitHub Check: Typecheck
• GitHub Check: Lint
• GitHub Check: build (linux/amd64)

🔇 Additional comments (1)

apps/event-worker/Dockerfile (1)

57-57: Instrumentation Module Preload Update

The updated CMD now preloads the instrumentation module using the -r flag, i.e.,

CMD node -r ./apps/event-worker/dist/instrumentation-node.js --max-old-space-size=${NODE_MAX_OLD_SPACE_SIZE} apps/event-worker/dist/index.js

This change aligns with the PR objective by shifting the instrumentation initialization to startup time. Consider the following:

• Path Verification: Ensure that ./apps/event-worker/dist/instrumentation-node.js is present at the expected location in the built Docker image. A relative path check against the Dockerfile's WORKDIR (which is set to /app) is advised.
• Side Effects: Verify that the instrumentation module does not introduce unintended side effects or delays during container startup.
• Documentation Update: It may be helpful to update any relevant documentation or comments to reflect that instrumentation is now preloaded, especially if related logic was removed from index.ts.

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