Analysis of task assignment process in Apache Mesos

The task allocation process analysis of Apache Mesos, see the following figure:

Step 1 when one of the following events occurs, the resource allocation behavior is triggered: New framework registration, frame cancellation, additional nodes, idle resources, etc.

Step 2 Mesos The allocator module in master to assign resources to a framework and encapsulate resources into resourceoffersmessage (protocal Buffer message). Transmission through the network to the schedulerprocess;

Step 3 schedulerprocess invoke the Resourceoffers function in the user-written scheduler (no version may be changed), and a new resource is available;

Step 4 The user's scheduler calls the Launchtasks () function in Mesosschedulerdriver, telling the task to be started;

Step 5 schedulerprocess The task to be launched into the Launchtasksmessage (protocal Buffer message) and transmits it to Mesos Master via the network;

Step 6 Mesos Master to encapsulate the tasks to be launched into Runtaskmessage to send to each Mesos Slave;

Step 7 Mesos slave receive Runtaskmessage message, send it further to the corresponding executorprocess;

Step 8 executorprocess The resource after receiving the message, and prepares the task to run the environment, which ultimately invokes the Launchtask startup task in the user-written executor (if Executor has not started, start executor first).

On a mesos slave, a task startup process is shown in the following illustration:

You might also like: 1 Apache mesos Total Architecture 2 Apache Mesos Base Library 3 Apache Mesos module Communication Architecture 4 Apache Mesos dispatch mechanism 5 Apache Mesos task status update process Analysis 6 Uncover the distributed cloud computing framework you don't know