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title description ms.date monikerRange
jobs.deployment.strategy definition
Execution strategy for this deployment.
03/02/2023
>=azure-pipelines-2020

jobs.deployment.strategy definition

:::moniker range=">=azure-pipelines-2020"

A deployment strategy enables you to configure how the update is delivered.

:::moniker-end

:::moniker range=">=azure-pipelines-2020"

Definitions that that reference this definition: jobs.deployment

:::moniker-end

Implementations

:::moniker range=">=azure-pipelines-2020"

Implementation Description
strategy: runOnce Run once deployment strategy.
strategy: rolling Rolling deployment strategy.
strategy: canary Canary deployment strategy.

:::moniker-end

Remarks

When you're deploying application updates, it's important that the technique you use to deliver the update will:

  • Enable initialization.
  • Deploy the update.
  • Route traffic to the updated version.
  • Test the updated version after routing traffic.
  • In case of failure, run steps to restore to the last known good version.

We achieve this by using lifecycle hooks that can run steps during deployment. Each of the lifecycle hooks resolves into an agent job or a server job (or a container or validation job in the future), depending on the pool attribute. By default, the lifecycle hooks will inherit the pool specified by the deployment job.

Deployment jobs use the $(Pipeline.Workspace) system variable.

If you are using self-hosted agents, you can use the workspace clean options to clean your deployment workspace.

  jobs:
  - deployment: deploy
    pool:
      vmImage: ubuntu-latest
      workspace:
        clean: all
    environment: staging

:::moniker range=">=azure-pipelines-2020"

strategy: runOnce

The runOnce deployment strategy rolls out changes by executing each of its steps one time.

strategy:
  runOnce: # RunOnce Deployment strategy.
    preDeploy: # Pre deploy hook for runOnce deployment strategy.
      steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
      pool: string | pool # Pool where pre deploy steps will run.
    deploy: # Deploy hook for runOnce deployment strategy.
      steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
      pool: string | pool # Pool where deploy steps will run.
    routeTraffic: # Route traffic hook for runOnce deployment strategy.
      steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
      pool: string | pool # Pool where route traffic steps will run.
    postRouteTraffic: # Post route traffic hook for runOnce deployment strategy.
      steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
      pool: string | pool # Pool where post route traffic steps will run.
    on: # On success or failure hook for runOnce deployment strategy.
      failure: # Runs on failure of any step.
        steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
        pool: string | pool # Pool where post on failure steps will run.
      success: # Runs on success of all of the steps.
        steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
        pool: string | pool # Pool where on success steps will run.

Properties

runOnce jobs.deployment.strategy.runOnce.
RunOnce Deployment strategy.

:::moniker-end

Remarks

runOnce is the simplest deployment strategy wherein all the lifecycle hooks, namely preDeploy deploy, routeTraffic, and postRouteTraffic, are executed once. Then, either on: success or on: failure is executed.

:::moniker range=">=azure-pipelines-2020"

strategy: rolling

A rolling deployment replaces instances of the previous version of an application with instances of the new version of the application on a fixed set of virtual machines (rolling set) in each iteration.

strategy:
  rolling: # Rolling Deployment strategy.
    maxParallel: string # Maximum number of jobs running in parallel.
    preDeploy: # Pre deploy hook for rolling deployment strategy.
      steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
      pool: string | pool # Pool where pre deploy steps will run.
    deploy: # Deploy hook for rolling deployment strategy.
      steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
      pool: string | pool # Pool where deploy steps will run.
    routeTraffic: # Route traffic hook for rolling deployment strategy.
      steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
      pool: string | pool # Pool where route traffic steps will run.
    postRouteTraffic: # Post route traffic hook for rolling deployment strategy.
      steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
      pool: string | pool # Pool where post route traffic steps will run.
    on: # On success or failure hook for rolling deployment strategy.
      failure: # Runs on failure of any step.
        steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
        pool: string | pool # Pool where post on failure steps will run.
      success: # Runs on success of all of the steps.
        steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
        pool: string | pool # Pool where on success steps will run.

Properties

rolling jobs.deployment.strategy.rolling.
Rolling Deployment strategy.

:::moniker-end

:::moniker range=">=azure-pipelines-2020"

strategy: canary

Canary deployment strategy rolls out changes to a small subset of servers.

strategy:
  canary: # Canary Deployment strategy.
    increments: [ string ] # Maximum batch size for deployment.
    preDeploy: # Pre deploy hook for canary deployment strategy.
      steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
      pool: string | pool # Pool where pre deploy steps will run.
    deploy: # Deploy hook for canary deployment strategy.
      steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
      pool: string | pool # Pool where deploy steps will run.
    routeTraffic: # Route traffic hook for canary deployment strategy.
      steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
      pool: string | pool # Pool where route traffic steps will run.
    postRouteTraffic: # Post route traffic hook for canary deployment strategy.
      steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
      pool: string | pool # Pool where post route traffic steps will run.
    on: # On success or failure hook for canary deployment strategy.
      failure: # Runs on failure of any step.
        steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
        pool: string | pool # Pool where post on failure steps will run.
      success: # Runs on success of all of the steps.
        steps: [ task | script | powershell | pwsh | bash | checkout | download | downloadBuild | getPackage | publish | template | reviewApp ] # A list of steps to run.
        pool: string | pool # Pool where on success steps will run.

Properties

canary jobs.deployment.strategy.canary.
Canary Deployment strategy.

:::moniker-end

Remarks

Canary deployment strategy is an advanced deployment strategy that helps mitigate the risk involved in rolling out new versions of applications. By using this strategy, you can roll out the changes to a small subset of servers first. As you gain more confidence in the new version, you can release it to more servers in your infrastructure and route more traffic to it.

See also