Skip to main content

TFS Build Agent doesn’t pick up all capabilities

Once a TFS build agent is configured on a build server it should scan the server for all capabilities and add them to a list. These capabilities can then be linked to demands to select an appropriate agent for your specific build script.

image

However at one client we noticed that the list of capabilities for all agents turned out rather empty whereas a lot of components were in fact installed on the server.

Inside the agent logs we found the following error message:

[2017-05-03 09:06:01Z INFO ProcessInvoker] Process started with process id 2828, waiting for process exit.

[2017-05-03 09:06:03Z INFO PowerShellCapabilitiesProvider] STDERR: . : File D:\Builds\dev-agent-3\bin\powershell\Add-Capabilities.ps1 cannot be loaded. The file D:\Builds\dev-agent-3\bin

[2017-05-03 09:06:03Z INFO PowerShellCapabilitiesProvider] STDERR: \powershell\Add-Capabilities.ps1 is not digitally signed. You cannot run this script on the current system. For more in

[2017-05-03 09:06:03Z INFO PowerShellCapabilitiesProvider] STDERR: formation about running scripts and setting execution policy, see about_Execution_Policies at http://go.microsoft.com/f

[2017-05-03 09:06:03Z INFO PowerShellCapabilitiesProvider] STDERR: wlink/?LinkID=135170.

[2017-05-03 09:06:03Z INFO PowerShellCapabilitiesProvider] STDERR: At line:1 char:3

[2017-05-03 09:06:03Z INFO PowerShellCapabilitiesProvider] STDERR: + . 'D:\Builds\dev-agent-3\bin\powershell\Add-Capabilities.ps1'

[2017-05-03 09:06:03Z INFO PowerShellCapabilitiesProvider] STDERR: +   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[2017-05-03 09:06:03Z INFO PowerShellCapabilitiesProvider] STDERR:     + CategoryInfo          : SecurityError: (:) [], PSSecurityException

[2017-05-03 09:06:03Z INFO PowerShellCapabilitiesProvider] STDERR:     + FullyQualifiedErrorId : UnauthorizedAccess

[2017-05-03 09:06:03Z INFO ProcessInvoker] Finished process with exit code 1, and elapsed time 00:00:01.2248303.

On this server a group policy is applied that prevents the execution of unsiged Powershell scripts. As the agent is using Powershell to scan a system for capabilities it failed silenty behind the scenes.

The solution was to ask the server team to sign all scripts for us.

Labels:

Popular posts from this blog

Azure DevOps/ GitHub emoji

I’m really bad at remembering emoji’s. So here is cheat sheet with all emoji’s that can be used in tools that support the github emoji markdown markup: All credits go to rcaviers who created this list.
Read more

Kubernetes–Limit your environmental impact

Reducing the carbon footprint and CO2 emission of our (cloud) workloads, is a responsibility of all of us. If you are running a Kubernetes cluster, have a look at Kube-Green . kube-green is a simple Kubernetes operator that automatically shuts down (some of) your pods when you don't need them. A single pod produces about 11 Kg CO2eq per year( here the calculation). Reason enough to give it a try! Installing kube-green in your cluster The easiest way to install the operator in your cluster is through kubectl. We first need to install a cert-manager: kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.14.5/cert-manager.yaml Remark: Wait a minute before you continue as it can take some time before the cert-manager is up & running inside your cluster. Now we can install the kube-green operator: kubectl apply -f https://github.com/kube-green/kube-green/releases/latest/download/kube-green.yaml Now in the namespace where we want t
Read more

DevToys–A swiss army knife for developers

As a developer there are a lot of small tasks you need to do as part of your coding, debugging and testing activities.  DevToys is an offline windows app that tries to help you with these tasks. Instead of using different websites you get a fully offline experience offering help for a large list of tasks. Many tools are available. Here is the current list: Converters JSON <> YAML Timestamp Number Base Cron Parser Encoders / Decoders HTML URL Base64 Text & Image GZip JWT Decoder Formatters JSON SQL XML Generators Hash (MD5, SHA1, SHA256, SHA512) UUID 1 and 4 Lorem Ipsum Checksum Text Escape / Unescape Inspector & Case Converter Regex Tester Text Comparer XML Validator Markdown Preview Graphic Color B
Read more