Scheduled run not running even though it was set up correctly? - azure-devops

Question

I've added a schedule block to my pipeline that backs up my RDS database. This is the main yaml file for the pipeline, and yaml validator finds no errors. So why is it not running? Nothing shows up in Scheduled Runs section in the UI, and I actually waited 3 hours for it to run, to no avail. What am I missing?
name: $(Date:yyyyMMdd)$(Rev:.r)
variables:
- template: ../global-vars.yml
resources:
repositories:
- repository: self
type: git
name: Deployment
trigger: none
schedules:
- cron: "0 */3 * * *"
displayName: DB backup every 3 hours
branches:
include:
- master
always: true
stages:
- stage: DBBackup
displayName: DB Backup
jobs:
- template: /templates/db/backup.yml

Answer 1

There is no property schedules which can be placed in resources > repositories > repository according to YAML syntax documentation
https://learn.microsoft.com/en-us/azure/devops/pipelines/yaml-schema/resources-repositories-repository?view=azure-pipelines
You can add schedules on the top level of YAML
https://learn.microsoft.com/en-us/azure/devops/pipelines/yaml-schema/schedules-cron?view=azure-pipelines
try something like this sample
name: $(Date:yyyyMMdd)$(Rev:.r)
variables:
- template: ../global-vars.yml
schedules:
- cron: "0 */3 * * *"
displayName: DB backup every 3 hours
branches:
include: master
always: true
resources:
repositories:
- repository: self
type: git
name: Deployment
trigger: none
stages: (...)