Hi, All: I just start working on Mesos source code for a research project. I become confused about the starting procedure, thus need some help. I'm talking about the working procedure of using, "mesos-execute" to execute a docker image.
1. How is resource offered to the framework (docker) from master? In Master::offer(), I find a "ResourceOffersMessage" is sent. I search the source code, find that only "mesos-1.2.0/src/sched/*sched.cpp*" has a function to receive this message, and this function finally invokes a scheduler-driver to finish the task. But, I believe this is not the procedure in which resource is offered to the docker-image, as I don't see any logic of "mesos-1.2.0/src/cli/ *execute.cpp*" using "*sched.cpp*"; and according to the documentation, "Mesos provides a simple executor that can execute shell commands and Docker containers on behalf of the framework scheduler". In "*execute.cpp*", I see a "offers()" function, which finally executes some executors. But I don't see where this function is call from the master? How does this simple executor executes shell commands and Docker containers on behalf of the framework scheduler? How is the "*sched.cpp*" used in the source code? 2. After "execute.cpp" subscribes to the master, "framework" information is created in the master. But how is this "framework" info distributed to the slaves? I become confused about this procedure. Could anyone kindly give some suggestions? Thanks very much Wenzhao
