Class TaskGroup (0.17.28) 

TaskGroup(mapping=None, *, ignore_unknown_fields=False, **kwargs)

A TaskGroup defines one or more Tasks that all share the same TaskSpec.

Attributes
Name Description
name str
Output only. TaskGroup name. The system generates this field based on parent Job name. For example: "projects/123456/locations/us-west1/jobs/job01/taskGroups/group01".
task_spec google.cloud.batch_v1alpha.types.TaskSpec
Required. Tasks in the group share the same task spec.
task_count int
Number of Tasks in the TaskGroup. Default is 1.
parallelism int
Max number of tasks that can run in parallel. Default to min(task_count, parallel tasks per job limit). See: `Job Limits
scheduling_policy google.cloud.batch_v1alpha.types.TaskGroup.SchedulingPolicy
Scheduling policy for Tasks in the TaskGroup. The default value is AS_SOON_AS_POSSIBLE.
allocation_policy google.cloud.batch_v1alpha.types.AllocationPolicy
Compute resource allocation for the TaskGroup. If specified, it overrides resources in Job.
labels MutableMapping[str, str]
Labels for the TaskGroup. Labels could be user provided or system generated. You can assign up to 64 labels. `Google Compute Engine label restrictions
task_environments MutableSequence[google.cloud.batch_v1alpha.types.Environment]
An array of environment variable mappings, which are passed to Tasks with matching indices. If task_environments is used then task_count should not be specified in the request (and will be ignored). Task count will be the length of task_environments. Tasks get a BATCH_TASK_INDEX and BATCH_TASK_COUNT environment variable, in addition to any environment variables set in task_environments, specifying the number of Tasks in the Task's parent TaskGroup, and the specific Task's index in the TaskGroup (0 through BATCH_TASK_COUNT - 1).
task_count_per_node int
Max number of tasks that can be run on a VM at the same time. If not specified, the system will decide a value based on available compute resources on a VM and task requirements.
require_hosts_file bool
When true, Batch will populate a file with a list of all VMs assigned to the TaskGroup and set the BATCH_HOSTS_FILE environment variable to the path of that file. Defaults to false. The host file supports up to 1000 VMs.
permissive_ssh bool
When true, Batch will configure SSH to allow passwordless login between VMs running the Batch tasks in the same TaskGroup.
run_as_non_root bool
Optional. If not set or set to false, Batch uses the root user to execute runnables. If set to true, Batch runs the runnables using a non-root user. Currently, the non-root user Batch used is generated by OS Login. For more information, see `About OS Login
service_account google.cloud.batch_v1alpha.types.ServiceAccount
Optional. ServiceAccount used by tasks within the task group for the access to other Cloud resources. This allows tasks to operate with permissions distinct from the service account for the VM set at AllocationPolicy. Use this field when tasks require different access rights than those of the VM. Specify the service account's email field. Ensure scopes include any necessary permissions for tasks, in addition to the default 'cloud-platform' scope.

Classes

LabelsEntry

LabelsEntry(mapping=None, *, ignore_unknown_fields=False, **kwargs)

The abstract base class for a message.

Parameters
Name Description
kwargs dict

Keys and values corresponding to the fields of the message.
mapping Union[dict, .Message]

A dictionary or message to be used to determine the values for this message.
ignore_unknown_fields Optional(bool)

If True, do not raise errors for unknown fields. Only applied if mapping is a mapping type or there are keyword parameters.

SchedulingPolicy

SchedulingPolicy(value)

How Tasks in the TaskGroup should be scheduled relative to each other.

    Tasks might be executed in parallel depending on parallelism
    and task_count values.
IN_ORDER (2):
    Run Tasks sequentially with increased task
    index.