How to create cron jobs in openshift container platform?

All cron job schedule times are based on the timezone of the master where the job is initiated. You can also create and launch a cron job from a single command using oc run. The following command creates and launches the same cron job as specified in the previous example: With oc run, the --schedule option accepts schedules in cron format.
Subsequently, how often should cron jobs be created in OpenShift?
As of OpenShift Container Platform 3.3.1, Cron Jobs is a feature in Technology Preview. A cron job creates a job object approximately once per execution time of its schedule, but there are circumstances in which it will fail to create a job or two jobs might be created. As a result, jobs should be idempotent.
Likewise, how does a job work in OpenShift 3.1? In OpenShift 3.1 we introduced the concept of jobs. A job will create one or more pods and run them to completion. This is different from a replicationController, which keeps the pods up and running. A job will run the pod until the pod finishes the task it was assigned. You can think of a job as a pod with a restartPolicy of Never.
Furthermore, which is an example of a cronjob resource?
The following is an example of a CronJob resource: Schedule for the job. In this example, the job will run every minute. Job template. This is similar to the job example. Sets a label for jobs spawned by this cron job. The restart policy of the pod. This does not apply to the job controller.
Additionally, how to create a cron job in OC run?
You can also create and launch a cron job from a single command using oc run. The following command creates and launches the same cron job as specified in the previous example: With oc run, the --schedule option accepts schedules in cron format. When creating a cron job, oc run only supports the Never or OnFailure restart policies ( --restart ).

20 Similar Question Found

How does scheduled jobs work in openshift container platform?

A scheduled job builds on a regular job by allowing you to specifically schedule how the job should be run. Scheduled jobs are part of the Kubernetes API, which can be managed with oc commands like other object types. As of OpenShift Container Platform 3.3.1, Scheduled Jobs is a feature in Technology Preview.

How to create jobs in openshift container platform?

You create a job in OpenShift Container Platform by creating a job object. Optionally, specify how many pod replicas a job should run in parallel; defaults to 1. For non-parallel jobs, leave unset. When unset, defaults to 1. Optionally, specify how many successful pod completions are needed to mark a job completed.

How does nodeport work in openshift container platform?

A nodePort works with any IP address that allows traffic to terminate at any node in the cluster. Instead of connecting directly to individual nodes, you can use one of OpenShift Container Platform’s highly availability strategies by deploying the IP failover router to provide access services configured with external IP addresses.

How does a job work in openshift container platform?

A job, in contrast to a replication controller, runs a pod with any number of replicas to completion. A job tracks the overall progress of a task and updates its status with information about active, succeeded, and failed pods. Deleting a job will clean up any pod replicas it created.

Which is an artifact of the openshift container platform?

In the context of OpenShift Container Platform and its combined foundation of Kubernetes and Docker, additional application artifacts include: Docker container images with their rich set of metadata and associated tooling. Environment variables that are injected into containers for application use.

What is openshift container platform?

OpenShift Container Platform. OpenShift Container Platform (formerly known as OpenShift Enterprise) is Red Hat's on-premises private platform as a service product, built around a core of application containers powered by Docker, with orchestration and management provided by Kubernetes, on a foundation of Red Hat Enterprise Linux.

How are deployments supported in openshift container platform?

Building on replication controllers, OpenShift Container Platform adds expanded support for the software development and deployment lifecycle with the concept of deployments. In the simplest case, a deployment just creates a new replication controller and lets it start up pods.

How does openshift container platform work with docker?

OpenShift Container Platform uses container engines (CRI-O or Docker) to run applications in pods that are composed by any number of containers. As a cluster administrator, sometimes container engines requires some extra configuration in order to efficiently run elements of the OpenShift Container Platform installation.

How to idle scalable resources in openshift container platform?

Idle scalable resources. An idled Service will automatically become unidled when it receives traffic or it can be manually unidled using the oc scale command. Manage images in your OpenShift Container Platform cluster.

How is authorization handled in openshift container platform?

Authorization is handled in the OpenShift Container Platform policy engine, which defines actions like "create pod" or "list services" and groups them into roles in a policy document. Roles are bound to users or groups by the user or group identifier.

What does the red hat openshift container platform do?

Red Hat® OpenShift® is a container application platform that brings Docker and Kubernetes to the enterprise. Regardless of your applications architecture, OpenShift lets you easily and quickly build, develop, and deploy in nearly any infrastructure, public or private.

How to restart openshift container platform master service?

Restart the OpenShift Container Platform master service to apply the changes. The IP address pool must terminate at one or more nodes in the cluster. If the project and service that you want to expose do not exist, first create the project, then the service.

How does openshift container platform deploy a cluster?

The OpenShift Container Platform installation program creates the Ignition config files that you need to deploy your cluster. These files are based on the information that you provide to the installation program directly or through an install-config.yaml file. OpenShift Container Platform uses the manifest files to create pods on the node.

Who are the users of the openshift container platform?

A user is an entity that interacts with the OpenShift Container Platform API. These can be a developer for developing applications or an administrator for managing the cluster. Users can be assigned to groups, which set the permissions applied to all the group’s members.

Is the openshift container platform compatible with vsphere?

OpenShift Container Platform supports VMware vSphere’s Virtual Machine Disk (VMDK) volumes. You can provision your OpenShift Container Platform cluster with persistent storage using VMware vSphere. Some familiarity with Kubernetes and VMware vSphere is assumed.

How does load balancing work in openshift container platform?

When both router and service provide load balancing, OpenShift Container Platform uses the router load balancing. A router detects relevant changes in the IP addresses of its services and adapts its configuration accordingly. This is useful for custom routers to communicate modifications of API objects to an external routing solution.

Where does dns resolve to in openshift container platform?

Your administrator may have configured a DNS wildcard entry that will resolve to the OpenShift Container Platform node that is running the OpenShift Container Platform router. If you are using a different host name you may need to modify its DNS records independently to resolve to the node that is running the router.

How are node selectors used in openshift container platform?

Using node selectors to control pod placement You can use node selector labels on pods to control where the pod is scheduled. With node selectors, OpenShift Container Platform schedules the pods on nodes that contain matching labels. You can add labels to a node or MachineConfig, but the labels will not persist if the node or machine goes down.

What causes latency when using openshift container platform?

Without preload set, browsers must have interacted with the site over HTTPS to get the header. Sometimes applications deployed through OpenShift Container Platform can cause network throughput issues such as unusually high latency between specific services.

How does sticky session work in openshift container platform?

OpenShift Container Platform provides sticky sessions, which enables stateful application traffic by ensuring all traffic hits the same endpoint. However, if the endpoint pod terminates, whether through restart, scaling, or a change in configuration, this statefulness can disappear.