[Feature] Load default config file from classpath with Enviroment variable override

[alievrenkut]

Search before asking

• I had searched in the issues and found no similar feature requirement.

Description

Load default config file from classpath so that we can override it with environment variables.
For example it is not possible to start agent while we already have SW_AGENT_NAME env property.
This only works if we put config file next to jar file. It should work without any config file.

Use case

I want to only write -javaagent:/path/to/skywalking-agent.jar and agent picks configuration from environment variables.

Related issues

No response

Are you willing to submit a pull request to implement this on your own?

• Yes I am willing to submit a pull request on my own!

Code of Conduct

• I agree to follow this project's Code of Conduct

[wu-sheng]

We don't have a plan to support this. Mostly, people is using container and k8s to deploy already.
Can't see why you can't have system env variable setup, using -D, or provide a new config file in a folder. That is an easy deployment setup.

[alievrenkut]

Sorry, My mistake I was thinking only skywalking-agent.jar is needed to work but I see that we need other folders like plugins, activations, ... etc

I was thinking so that we supply single jar but now I see it will not be that easy.