Deployment of YuniKorn using a ConfigMap
Build docker image
Under project root of the
yunikorn-k8shim, run the command to build an image using the map for the configuration:
This command will build an image. The image will be tagged with a default version and image tag.
Note the default build uses a hardcoded user and tag. You must update the
IMAGE_TAG variable in the
Makefile to push to an appropriate repository.
Create the ConfigMap
This must be done before deploying the scheduler. It requires a correctly setup kubernetes environment. This kubernetes environment can be either local or remote.
- download configuration file if not available on the node to add to kubernetes:
- create ConfigMap in kubernetes:
- check if the ConfigMap was created correctly:
Note if name of the ConfigMap is changed the volume in the scheduler yaml file must be updated to reference the new name otherwise the changes to the configuration will not be picked up.
Attach ConfigMap Volume to the Scheduler Pod
The ConfigMap is attached to the scheduler as a special volume. First step is to specify where to mount it in the pod:
Second step is to link the mount point back to the configuration map created in kubernetes:
Both steps are part of the scheduler yaml file, an example can be seen at scheduler.yaml for reference.
Deploy the Scheduler
The scheduler can be deployed with following command.
Configuration Hot Refresh
YuniKorn supports to load configuration changes automatically from attached configmap. Simply update the content in the configmap, that can be done either via Kubernetes dashboard UI or commandline. Note, changes made to the configmap might have some delay to be picked up by the scheduler.