Skip to main content

Azure Pipelines - A template expression is not allowed in this context

In my attempt to further optimize our deployment process, I tried to move most of the pipeline logic to a YAML template. This is how the template looked like(I simplified it a little bit):

However when I tried to create a pipeline using this template I got the following error message:

/cd-template.yml (Line: 14, Col: 14): A template expression is not allowed in this context

The problem is that I’m trying to use a template expression inside a pipeline resource.

First I was thinking I did something wrong but then I found the following announcement in the release notes:

Previously, compile-time expressions (${{ }}) were not allowed in the resources section of an Azure Pipelines YAML file. With this release, we have lifted this restriction for containers. This allows you to use runtime parameter contents inside your resources, for example to pick a container at queue time. We plan to extend this support to other resources over time.

As stated above, compile time expressions are not allowed in the resources section. With the change above it becomes possible but only when using the container resource.

So no luck for me! Hopefully this will change in future versions…

Labels:

Popular posts from this blog

.NET 8–Keyed/Named Services

A feature that a lot of IoC container libraries support but that was missing in the default DI container provided by Microsoft is the support for Keyed or Named Services. This feature allows you to register the same type multiple times using different names, allowing you to resolve a specific instance based on the circumstances. Although there is some controversy if supporting this feature is a good idea or not, it certainly can be handy. To support this feature a new interface IKeyedServiceProvider got introduced in .NET 8 providing 2 new methods on our ServiceProvider instance: object? GetKeyedService(Type serviceType, object? serviceKey); object GetRequiredKeyedService(Type serviceType, object? serviceKey); To use it, we need to register our service using one of the new extension methods: Resolving the service can be done either through the FromKeyedServices attribute: or by injecting the IKeyedServiceProvider interface and calling the GetRequiredKeyedServic...
Read more

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