simple example of a multi-stage pipeline

multistage.yml

name: cust-App-NP-$(Date:yyyyMMdd).$(Rev:.r)
trigger:
  batch: true
  branches:
    include:
    - master  

variables: 
  - group: cust_non_prod_shared_terraform_config

stages:
- stage: dev
  displayName: Development
  variables: 
    - group: cust_dev_terraform_config
  jobs: 
  - job: upload
    pool: cust-pool
    steps: 
      - template: templates/upload.yml
        parameters:
          env: $(env)
          azure_sub: $(azure_sub)
          name: $(name)
  - deployment: install
    environment: cust-dev
    pool: cust-pool
    dependsOn: upload
    strategy:
      runOnce:
        deploy:
          steps:
            - template: templates/install.yml
              parameters: 
                env: $(env)
                azure_sub: $(azure_sub)
                name: $(name)
- stage: test
  displayName: Test
  variables: 
    - group: cust_test1_terraform_config
  jobs: 
  - job: upload
    pool: cust-pool
    steps: 
      - template: templates/upload.yml
        parameters:
          env: $(env)
          azure_sub: $(azure_sub)
          name: $(name)
  - deployment: install
    environment: cust-test1
    pool: cust-pool
    dependsOn: upload
    strategy:
      runOnce:
        deploy:
          steps:
            - template: templates/install.yml
              parameters: 
                env: $(env)
                azure_sub: $(azure_sub)
                name: $(name)
- stage: stg
  displayName: Staging
  variables: 
    - group: cust_stg1_terraform_config
  jobs: 
  - job: upload
    pool: cust-pool
    steps: 
      - template: templates/upload.yml
        parameters:
          env: $(env)
          azure_sub: $(azure_sub)
          name: $(name)
  - deployment: install
    environment: cust-stg1
    pool: cust-pool
    dependsOn: upload
    strategy:
      runOnce:
        deploy:
          steps:
            - template: templates/install.yml
              parameters: 
                env: $(env)
                azure_sub: $(azure_sub)
                name: $(name)