Drainer¶
Drainer is the component to drain pods off the node before terminating. It may drain and terminate nodes for three reasons:
spot_interruption
node_migration
scaling_down
NOTE: all settings are only compatible with Kubernetes clusters.
Drainer Batch¶
The Drainer batch is the entrypoint of the draining logic.
The batch code can be invoked from the clusterman.batch.drainer
Python module.
Pool Configuration¶
The behaviour of the drainer logic for a pool is controlled by the draining
section of the pool configuration.
The allowed values for the drainer settings are as follows:
draining_time_threshold_seconds
: maximum time to complete draining process (1800 by default)redraining_delay_seconds
: how much to wait between draining tries in case of draining failure (15 by default).force_terminate
: forcibly terminate the node after reaching draining_time_threshold_seconds (false by default).
See Pool Configuration for how an example configuration block would look like.