The following code block explains passing the variable 'agentvalue' to the StopVM stage.
Code explanation:
In the StartVM stage, the variable 'agentvalue' is declared and the agentname value is assigned to the variable 'agentvalue'. Task name 'setagentname' has to be defined for the task if a variable is defined.
In the StopVM stage, the variable called 'VirtualMachine' is created to access the output of agentvalue. The 'VirtualMachine' is accessed only within that stage.
Any variable can only be accessed within that stage after defined.
The dependsOn condition on the StopVM stage is dependent with StartVM and Cleanup stages to complete their executions to continue with StopVM stage.
By default in azure pipelines, the second stage is dependent to the first stage - third to second and so on. If we have only the second stage (Build stage) and StopVM stage, then these two stages will be executed parallely once StartVM stage is completed.
Syntax:
To use the output from a different stage, the format for referencing variables is stageDependencies.STAGE.JOB.outputs['TASK.VARIABLE']
To reference a variable from a task from a different job, use dependencies.JOB.outputs['TASK.VARIABLE']
# Add steps that build, run tests, deploy, and more: # https://aka.ms/yaml trigger: - none name: $(TeamProject)-$(SourceBranchName)-$(Build.BuildId)-$(Hours)$(Minutes)$(Seconds)-$(Date:yyyyMMdd)$(Rev:.r) pool: name: test parameters: - name: WarGeneration displayName: Run WarGeneration type: boolean default: false stages: - stage: StartVM displayName: StartVM jobs: - job: StartVM timeoutInMinutes: 0 displayName: StartVM pool: name: Azure Pipelines steps: - checkout: none - task: AzureKeyVault@2 inputs: azureSubscription: 'xxx' KeyVaultName: 'xxx' SecretsFilter: 'xxx,yyy' RunAsPreJob: true - task: CmdLine@2 inputs: script: | az login --service-principal --username $(xxx) --password $(xxx) --tenant $(xxx) flag=true; echo $flag while ($flag); do vmstatusvm1=`az vm show -g xxx -n vm1 -d --query powerState -o tsv` vmnamevm1=`az vm show -g xxx -n vm1 -d --query name -o tsv` vmstatusvm2=`az vm show -g xxx -n vm2 -d --query powerState -o tsv` vmnamevm2=`az vm show -g xxx -n vm2 -d --query name -o tsv` if [[ $vmstatusvm1 == 'VM deallocate' && $vm1 == 'vm1' ]]; then agentname=vm1 echo $agentname az vm start --resource-group xxx --name $agentname echo "##vso[task.setvariable variable=agentvalue;isOutput=true]$agentname" flag=false elif [[ $vmstatusvm2 == 'VM deallocated' && $vm2 == 'vm2' ]]; then agentname=vm2 echo $agentname az vm start --resource-group xxx --name $agentname echo "##vso[task.setvariable variable=agentvalue;isOutput=true]$agentname" flag=false else echo "There are no VM's available to trigger a new build." fi done name: setagentname - stage: Build displayName: Build stage jobs: - job: Build timeoutInMinutes: 0 displayName: Build steps: - checkout: none - task: Bash@3 inputs: targetType: 'inline' script: | echo "Printing virtual none" - ${{ if eq(parameters.WarGeneration, true) }}: - stage: WarGeneration displayName: WarGeneration jobs: - job: War timeoutInMinutes: 0 displayName: War pool: name: test demands: - Agent.OS -equals Linux steps: - checkout: none - task: AzureKeyVault@2 inputs: azureSubscription: 'xxx' KeyVaultName: 'xxx' SecretsFilter: 'xxx' RunAsPreJob: true - stage: Cleanup displayName: Cleanup stage condition: always() jobs: - job: CleanupJob timeoutInMinutes: 0 displayName: Cleanup Job pool: name: test demands: - Agent.OS -equals Linux steps: - checkout: none - task: PowerShell@2 displayName: Cleanup Task inputs: targetType: 'inline' script: | echo "Cleanup" - stage: StopVM displayName: StopVM stage dependsOn: - StartVM - Cleanup condition: always() variables: - name: VirtualMachine value: $[ stageDependencies.StartVM.StartVM.outputs['setagentname.agentvalue'] ] jobs: - job: StopVM timeoutInMinutes: 0 displayName: StopVM pool: name: Azure Pipelines steps: - checkout: none - task: AzureKeyVault@2 inputs: azureSubscription: 'xxx' KeyVaultName: 'xxx' SecretsFilter: 'xxx,yyy' RunAsPreJob: true - task: Bash@3 inputs: targetType: 'inline' script: | az login --service-principal --username $(xxx) --password $(xxx) --tenant $(xxx) az vm deallocate --resource-group xxx --name $(VirtualMachine) Reference link:
[Use outputs in a different stage - section from link]
https://learn.microsoft.com/en-us/azure/devops/pipelines/process/variables?view=azure-devops&tabs=yaml%2Cbatch#set-in-script
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