Hello,
I am trying to understand some basic components of Mesos and i have made some
notes corresponding to my conclusion. If somebody could check this out and
review them, or can provide me some more information about the specific topic i
would be thankful. Below you will find my notes.
- Containerizers:
1. Mesos Containerizer
- posix isolators
- cgroups isolators
2. Docker containerizer
- docker isolators
3. Custom containerizer
- my isolators
- Executors:
Generally: Each executor has the minimum resources assigned by default (0.01
CPU & 32MB MEM)
Executor expands its resources when a task is assigned (executor
default resources + task resources)
1. Mesos commandExecutor
- run shell commands or docker
- Each executor is a container that can have only one task to execute,
you can't specify group of tasks
- Isolation between executors/containers so isolation between tasks
because each task runs in one container
2. Mesos defaultExecutor
- can run shell commands or a custom executor file e.g TestExecutor.java
(from tests)
- can execute one task per executor/container or multiple tasks (1
group).
- No resource isolation between tasks of the same container
3. Custom Executor
- ?????
So, i guess i can use one offer to run some tasks on the same agent with
commandExecutor or with defaultExecutor….
But how would somebody specify if the offer corresponds to one agent or
multiple agents?
Thank you,
Thodoris
