nodejs 应用在 AppEngine 标准环境中运行时未收到 SIGTERM

Question

We have a nodejs app running in the AppEngine Standard Environment. I'm expecting to receive SIGTERM from the environment during deployments or when autoscaling so that I can start a "graceful shutdown" process. My process.on('SIGTERM', handler) handler is not being called.

Should I be getting SIGTERM like I'm expecting or are my expectations wrong?

Answer 1

App engine standard environment only destroys and create instances, without send any signal before scale up or scale down.

Keep in mind that App Engine STD runs over a sandbox runtime and has lack of some OS perks.

If you need run some tasks on shutdown application time is recommended to use App Engine Flexible Environment, this environment can handle SIGTERM signals