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nm_operator

description

nm_operator is a http server, which packaging YARN execution commands. By calling API, users could execute YARN command remotely, such as starting NodeManager, or updating configuration file. Now the supported API are as following:

  • /v1/nm/status, check if NodeManager is running
  • /v1/nm/capacity, get or update NodeManager resource capacity, including vcores and memory
  • /v1/nm/property, get or update configuration file, such as yarn-site.xml
  • /v1/nm/start, start NodeManager process
  • /v1/nm/stop, stop NodeManager process
  • /v1/nm/schedule/disable, disable NodeManager accepting new jobs
  • /v1/nm/schedule/enable, recover NodeManager accepting new jobs
  • /v1/nm/capacity/update, notify ResourceManager to update resource

How to use

Users prepare a base image which including the NodeManager process, and copy the nm_operator binary into Dockerfile as the ENTRYPOINT or CMD to build a new image. Then users could submit a workload on kubernetes with the new image, the workload must be scheduled on the nodes where caelus is running, let caelus call the API to execute YARN commands. Uses could follow the example Yaml file.