Any common/standard way for pulling latest versions of apps to newly launched instances?

brian.donahue's Avatar


13 Dec, 2017 05:21 PM

We are setting up an AWS Windows environment, and currently are using the Appveyor Agent to deploy to existing instances which works well. We basically have each Auto Scaling Group assigned to a Deployment Group and all instances get the same apps for that Deployment Group.

But when a new instance comes online, we need to deploy the current versions of all apps in the deployment group on the new instance. Is there a way to trigger that via the Agent (assuming not). To use Appveyor Agent, it would seem the only way would be to poll for the deployments, and trigger new deployments of latest version via Powershell?

Are there other/better ways that people have done this? One option I'm looking at is deploying to S3 and using CodeDeploy which does support "deploy-on-launch" of latest versions.


  1. Support Staff 1 Posted by Ilya Finkelshte... on 14 Dec, 2017 04:19 AM

    Ilya Finkelshteyn's Avatar

    Hi Brian,

    I believe the following scenario will work:

    1. For specific Environment, set deployment group name to be an environment variable as described here. Set existing value as default value so default behavior do not change.

    2. On lunch of new instance set deployment group to computername environment variable. If you install AppVeyor deployment agent on startup, you probably already use DEPLOYMENT_GROUP command line parameter. If it is pre-installed, update it in registry key HKEY_LOCAL_MACHINE\SOFTWARE\AppVeyor\DeploymentAgent value name DeploymentGroup.

    3. After that (also part as startup script) start Environment deployment with API. Pass deployment group computername as environment variable (which you set in the step 1), so it will overwrite default deployment group and deployment will happen only to this instance.

    4. In deploy.ps1 script, which happens after deployment, reset deployment group name in registry to default value. If you have a risk that the same deploy.ps1 will be called on instances in the different AWS scaling groups, send special environment variable (like default_deploy_group) when starting initial deployment on step 3 and make deploy.ps1 use it when editing the registry.

    Hope this make sense. It can look complicated, so feel free to ask any additional questions. Also we are happy to help with script samples if needed.


  2. 2 Posted by brian.donahue on 08 Jan, 2018 09:56 PM

    brian.donahue's Avatar

    Thanks - I have been playing with this and got it working, but now seem to be seeing some issues with the agent attempting to run two deploys simultaneously on the same group (machine, in this case). Is this intended behavior? It is causing sporadic failures as one deploy sets different environment variables than the other. E.g. an APPLICATION_PATH env var in one deploy is sometimes getting a value from another. Do I have to manage this in my script to ensure the deployments execute serially? Shouldn't the agent handle that?

  3. 3 Posted by brian.donahue on 08 Jan, 2018 09:58 PM

    brian.donahue's Avatar

    To clarify, my instance serves multiple applications, and I am triggering the latest deployment for each project in my script. I figured they'd be queued serially, but they seem to run in parallel and that causes issues.

  4. Support Staff 4 Posted by Ilya Finkelshte... on 09 Jan, 2018 07:20 AM

    Ilya Finkelshteyn's Avatar

    I see. Created this issue. We believe we can implement it by the end of this week. Would you mind to test pre-release agent version as it available?

  5. 5 Posted by brian.donahue on 09 Jan, 2018 06:51 PM

    brian.donahue's Avatar

    That's awesome - I'm happy to help test!

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