GCP cloud function, pub/sub and schedule

introduction

it's a server-less function running on the GCP, which means you don't have to manage VMs or docker containers
- use cases 👇
- log analysis, trigger the cloud function when ERROR occurs
- automated backup, taking a backup of files at a regular interval

GCP pub/sub enables reliable async communication between microservices/applications with the concept of topic, publisher, subscriber and message
for more info refer gcp documentation

QrMenu (2).png

create a GCP cloud function & attach a service account to it
in the trigger section choose Pub/Sub triggers and the topic which you have recently created
now click next & choose python3.8 as a coding language, clear all the code present inside the function & print("hello world") instead
now go to the pub/sub select the topic & send a message manually
now navigate back to the function, and switch to the logs panel, here you should be able to see "hello world" message
go to the scheduler service & create a new job, in frequency write * 5 times, which means it'll send a message on the interval of 1 min,in target-type select pub/sub, select your topic & write your message
now our function will be executed after every minute
you can write code to read/write files from cloud filestore with python sdk or api, make sure service account have sufficient permission