fix/exit state

[Colstuwjx]

1. set default stop signal to SIGTERM, now we would trigger SIGKILL finally;
2. trans p state to Stopping and Stopped if it's triggered by user, rather than exited...

[starInEcust]

Nice

[Dexus]

Hi @Colstuwjx i checked you PR and i see a problem now, if you restart a programm, your changes let hang the status in the stopping status. and you have no chance to restart or stop it then.

[Colstuwjx]

@Dexus Thanks for your check, have you been reproduced this restart issue? I couldn't reproduce this issue in mine prod.

Currently, from my view, I think restart a program would let it trans from Running -> Stopping -> Stopped ( at here ) -> Starting -> Running.

How could it stick in Stopping? 😿

[Dexus]

I'm not 100% sure.
In our image we see it current very often. that a process is hanging in the stopping line and then we need to restart the whole container because nothing else helps to reset the state.

But maybe it is not only a problem of your commit.

[Colstuwjx]

In my prod, I still couldn't reproduce the issue you mentioned.
I'm welcome if you could help me dive into the issue, and propose a fix by forking this repo and take a commit atop of my PR 😁