Passing cli arguments from pod to local application

[1grzyb1]

We pass the configuration to our application inside pod containers through CLI arguments. So for example my container definition inside the pod will look like that:

containers:
  name: container-name
  args:
    '--properties.propa.propb=value'
    '--properties.propc=value'

So I would like those properties to be passed as cli arguments in the same order as in args to my local app just like env variables are passed

[aviramha]

Proposal: This needs to be implemented in the agent, cli (and operator to support the new message), extensions (to modify the command line actually). I think it should be under a new feature in the configuration file, that lets user provide a regex to match arguments to use. It should also accept an optional parameter that tells us at what position of the command line to push this argument, for example:

{
    "feature": {
        "cmdline": {
            "filter": "-D.+",
            "position": 2
        }
    },
}

Now when remote has the cmdline

/app/user/java -Dfun=true -Dfun2=true -XXfun -jar fun.jar mainClass

Local that has the following cmdline:

/app/user/java -Dotherthing=1 -jar fun.jar mainClass

would be modified to

/app/user/java -Dotherthing=1  -Dfun=true -Dfun2=true -jar fun.jar mainClass

where /app/user/java is arg number 1, -Dotherthing=1 is 2, then we extend there the additional arguments.

Notes:

• Will require all components to be updated to support (cli, agent, extension [if used], operator)
• Need to ensure compatibility in terms of cli/extension API (as we pass in addition to the env, should be easy but just important to note)