I am trying to set up kubemq in my cluster, and this is the command the shown in their README
kubectl apply -f https://deploy.kubemq.io/community
There are a lot of empty field in that yaml and I want to customize it. How can I override an external yaml file applied by kubectl?
In the Kubernetes world, It's generally an unsafe idea to run a command like the below unless you trust the URL:
kubectl apply -f <some/web/url>
This is essentially the same as the following in the non-Kubernetes world:
curl </some/web/url> |bash
In both cases, we aren't inspecting the content downloaded from the URL and directly executing them by feeding to kubectl and bash directly. What if the URL is compromised with some harmful code?
A better approach is to break the single step into parts:
Example:
//download the file
curl -fsSL -o downloaded.yml https://deploy.kubemq.io/community
// inspect the file or edit the file
//Now apply the downloaded file after inspecting.
kubectl apply -f downloaded.yml
Why don't you just copy the content in a text file? Change whatever you want and apply it.