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[AIRFLOW-3516] Support to create k8 worker pods in batches #4434

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Jan 16, 2019
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[AIRFLOW-3516] Support to create k8 worker pods in batches #4434

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3 changes: 3 additions & 0 deletions airflow/config_templates/default_airflow.cfg
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Original file line number Diff line number Diff line change
Expand Up @@ -598,6 +598,9 @@ worker_container_image_pull_policy = IfNotPresent
# If True (default), worker pods will be deleted upon termination
delete_worker_pods = True

# Number of Kubernetes Worker Pod creation calls per scheduler loop
worker_pods_creation_batch_size = 1

# The Kubernetes namespace where airflow workers should be created. Defaults to `default`
namespace = default

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5 changes: 3 additions & 2 deletions airflow/contrib/executors/kubernetes_executor.py
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Expand Up @@ -135,7 +135,8 @@ def __init__(self):
self.kube_node_selectors = configuration_dict.get('kubernetes_node_selectors', {})
self.delete_worker_pods = conf.getboolean(
self.kubernetes_section, 'delete_worker_pods')

self.worker_pods_creation_batch_size = conf.getint(
self.kubernetes_section, 'worker_pods_creation_batch_size')
self.worker_service_account_name = conf.get(
self.kubernetes_section, 'worker_service_account_name')
self.image_pull_secrets = conf.get(self.kubernetes_section, 'image_pull_secrets')
Expand Down Expand Up @@ -646,7 +647,7 @@ def sync(self):
KubeResourceVersion.checkpoint_resource_version(
last_resource_version, session=self._session)

if not self.task_queue.empty():
for i in range(min((self.kube_config.worker_pods_creation_batch_size, self.task_queue.qsize()))):
task = self.task_queue.get()

try:
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