Table: kubernetes_cronjob - Query Kubernetes CronJobs using SQL

A Kubernetes CronJob creates Jobs on a repeating schedule, similar to the job scheduling in Unix-like systems. It is a way to run automated tasks at regular, predetermined times. CronJobs use the Cron format to schedule tasks.

Table Usage Guide

The kubernetes_cronjob table provides insights into CronJobs within Kubernetes. As a DevOps engineer, explore CronJob-specific details through this table, including schedules, job histories, and associated metadata. Utilize it to monitor and manage your automated tasks, and ensure they are running as expected.

Examples

Basic Info

Explore which scheduled tasks within your Kubernetes environment have failed. This allows for proactive troubleshooting and understanding of task scheduling and execution patterns.

select
  name,
  namespace,
  uid,
  failed_jobs_history_limit,
  schedule,
  suspend
from
  kubernetes_cronjob;

select
  name,
  namespace,
  uid,
  failed_jobs_history_limit,
  schedule,
  suspend
from
  kubernetes_cronjob;

Get list of container and images for cronJobs

Explore which cronJobs are running in your Kubernetes environment and identify the containers and images they are using. This is useful to understand the dependencies and configurations of your scheduled tasks, and can help in troubleshooting or optimizing resource usage.

select
  name,
  namespace,
  jsonb_agg(elems.value -> 'name') as containers,
  jsonb_agg(elems.value -> 'image') as images
from
  kubernetes_cronjob,
  jsonb_array_elements(
    job_template -> 'spec' -> 'template' -> 'spec' -> 'containers'
  ) as elems
group by
  name,
  namespace;

select
  name,
  namespace,
  json_group_array(json_extract(elems.value, '$.name')) as containers,
  json_group_array(json_extract(elems.value, '$.image')) as images
from
  kubernetes_cronjob,
  json_each(job_template, '$.spec.template.spec.containers') as elems
group by
  name,
  namespace;

List manifest resources

Explore which scheduled tasks within your Kubernetes environment have a specified path. This can be useful to identify tasks that may be associated with certain applications or services, helping you to manage and monitor your resources more effectively.

select
  name,
  namespace,
  uid,
  failed_jobs_history_limit,
  schedule,
  suspend,
  path
from
  kubernetes_cronjob
where
  path is not null;

select
  name,
  namespace,
  uid,
  failed_jobs_history_limit,
  schedule,
  suspend,
  path
from
  kubernetes_cronjob
where
  path is not null;

Query examples

Control examples

Schema for kubernetes_cronjob

Name	Type	Description
_ctx	jsonb	Steampipe context in JSON form, e.g. connection_name.
active	jsonb	A list of pointers to currently running jobs.
annotations	jsonb	Annotations is an unstructured key value map stored with a resource that may be set by external tools to store and retrieve arbitrary metadata.
concurrency_policy	jsonb	Specifies how to treat concurrent executions of a Job.
context_name	text	Kubectl config context name.
creation_timestamp	timestamp with time zone	CreationTimestamp is a timestamp representing the server time when this object was created.
deletion_grace_period_seconds	bigint	Number of seconds allowed for this object to gracefully terminate before it will be removed from the system. Only set when deletionTimestamp is also set.
deletion_timestamp	timestamp with time zone	DeletionTimestamp is RFC 3339 date and time at which this resource will be deleted.
end_line	bigint	The path to the manifest file.
failed_jobs_history_limit	bigint	The number of failed finished jobs to retain. Value must be non-negative integer.
finalizers	jsonb	Must be empty before the object is deleted from the registry. Each entry is an identifier for the responsible component that will remove the entry from the list. If the deletionTimestamp of the object is non-nil, entries in this list can only be removed.
generate_name	text	GenerateName is an optional prefix, used by the server, to generate a unique name ONLY IF the Name field has not been provided.
generation	bigint	A sequence number representing a specific generation of the desired state.
job_template	jsonb	Specifies the job that will be created when executing a CronJob.
labels	jsonb	Map of string keys and values that can be used to organize and categorize (scope and select) objects. May match selectors of replication controllers and services.
last_schedule_time	timestamp with time zone	Information when was the last time the job was successfully scheduled.
last_successful_time	timestamp with time zone	Information when was the last time the job successfully completed.
name	text	Name of the object. Name must be unique within a namespace.
namespace	text	Namespace defines the space within which each name must be unique.
owner_references	jsonb	List of objects depended by this object. If ALL objects in the list have been deleted, this object will be garbage collected. If this object is managed by a controller, then an entry in this list will point to this controller, with the controller field set to true. There cannot be more than one managing controller.
path	text	The path to the manifest file.
resource_version	text	An opaque value that represents the internal version of this object that can be used by clients to determine when objects have changed.
schedule	text	The schedule in Cron format.
source_type	text	The source of the resource. Possible values are: deployed and manifest. If the resource is fetched from the spec file the value will be manifest.
start_line	bigint	The path to the manifest file.
starting_deadline_seconds	bigint	Optional deadline in seconds for starting the job if it misses scheduledtime for any reason.
successful_jobs_history_limit	bigint	The number of successful finished jobs to retain. Value must be non-negative integer.
suspend	boolean	This flag tells the controller to suspend subsequent executions, it does not apply to already started executions. Defaults to false.
tags	jsonb	A map of tags for the resource. This includes both labels and annotations.
title	text	Title of the resource.
uid	text	UID is the unique in time and space value for this object.

Export

This table is available as a standalone Exporter CLI. Steampipe exporters are stand-alone binaries that allow you to extract data using Steampipe plugins without a database.

You can download the tarball for your platform from the Releases page, but it is simplest to install them with the steampipe_export_installer.sh script:

/bin/sh -c "$(curl -fsSL https://steampipe.io/install/export.sh)" -- kubernetes

You can pass the configuration to the command with the --config argument:

steampipe_export_kubernetes --config '<your_config>' kubernetes_cronjob