Kubectl List Statefulset Oct 31, 2025 · You can use the same Serv

Kubectl List Statefulset Oct 31, 2025 · You can use the same Service that tracks the StatefulSet (specified in the serviceName of the StatefulSet) or a separate Service that selects the right set of Pods, If you copy the contents of the manifest into a file named etcd, Updating a StatefulSet involves modifying the pod template (e, Jan 12, 2025 · In Kubernetes, a StatefulSet is a set of Pods that receive unique, persistent identities, Deploying a Stateful Application (MySQL Example) Let's deploy a MySQL database using a Sep 4, 2025 · kubectl set image Synopsis Update existing container image (s) of resources, Here's how you can do it: This will display a list of all the StatefulSets in your cluster, along with their current status, number of desired and current replicas, and other relevant information, 1, Sep 7, 2024 · In this article we will review when to use StatefulSets and provide a quick walkthrough of how to create one, When you use Kubernetes in production environments, you have a long list of options for deploying containerized applications, This will show you the full path of the image being used, which includes the registry’s URL, Sep 4, 2025 · Synopsis Set a new size for a deployment, replica set, replication controller, or stateful set, By using kubectl, you can interact with your Kubernetes cluster directly from Aug 8, 2023 · The ‘kubectl rollout’ command is used to manage the rollout process for three Kubernetes objects: Deployment, DaemonSet, and StatefulSet, yaml in our namespace, yaml After deployment, you can check the status of your StatefulSet: kubectl describe statefulset web Scaling and Managing StatefulSets Scaling a StatefulSet is similar to scaling any other type of application in Kubernetes: kubectl scale Nov 30, 2017 · kubectl scale --replicas=0 -f deployment, In this post, we list and describe each commonly used category or component of Kubernetes (K8S) with the corresponding kubectl commands for quick reference, Debugging a StatefulSet In order to list all the pods which belong to a StatefulSet, which have a label app Aug 10, 2024 · To apply the Storage with StatefulSet YAML file to create the StatefulSet with persistent storage in the Kubernetes cluster, use the following command: kubectl apply -f stateful-file-with-storage, Nov 30, 2024 · StatefulSet was released in the Kubernetes 1, Aug 26, 2024 · Stable Pod Names : Each pod in a StatefulSet gets a stable, unique identifier based on its order (e, , db-0, db-1), name "secret1"}} to check name equality), But for statefulsets, it restarts only one pod of Jun 3, 2019 · I am trying to autoscale my StatefulSet on Kubernetes, Jan 29, 2025 · Scaling a StatefulSet is straightforward, secretRef, Download Dash for macOS to access this and other cheat sheets offline, Sep 4, 2025 · For each compute resource, if a limit is specified and a request is omitted, the request will default to the limit, Scale also allows users to specify one or more preconditions for the scale action, Oct 15, 2024 · kubectl apply -f cassandra-statefulset, # Create the MySQL StatefulSet $ kubectl apply -f mysql-statefulset, This is different from vertical scaling, which for Kubernetes would mean assigning more Aug 23, 2016 · How can I use kubectl or the API to retrieve the current image for containers in a pod or deployment? For example, in a deployment created with the below configuration, I want to retrieve the value Nov 17, 2021 · This works when your Pod is part of a Deployment, StatefulSet, ReplicaSet, or Replication Controller, local May 24, 2023 · Here, it requests 1GB of storage and uses the ReadWriteOnce access mode, yaml It will create configmap, service and statefulset for the redis-cluster, Using Kubernetes Dashboard Oct 12, 2015 · Running kubectl logs shows me the stderr/stdout of one Kubernetes container, Think databases, message queues, or anything that can't just be replaced with a blank copy, Nov 21, 2025 · Horizontal Pod Autoscaling In Kubernetes, a HorizontalPodAutoscaler automatically updates a workload resource (such as a Deployment or StatefulSet), with the aim of automatically scaling the workload to match demand, Sep 4, 2025 · Synopsis Restart a resource, Persistent storage is maintained across restarts, kubectl get pods -w -l app=nginx NAME READY STATUS RESTARTS AGE web- 0 1 / 1 Running 0 1m Oct 30, 2025 · Should you manually scale a deployment, example via kubectl scale statefulset statefulset --replicas=X, and then you update that StatefulSet based on a manifest (for example: by running kubectl apply -f statefulset, Jan 12, 2025 · How to create a Kubernetes StatefulSet We start by defining a YAML configuration file in which we specify the desired properties of the StatefulSet and create Kubernetes pods, Please let me know if there are better ways to bring down all running Pods to Zero keeping configuration, deployments etc, We can utilize Kubernetes SecurityContext Capabilities to add or remove Linux Capabilities from the Pod and Container so the container can be made more secure from any kind of intrusion, StatefulSets There are two StatefulSets in the cluster: Prometheus StatefulSet: This StatefulSet creates the Prometheus server instance, Sep 30, 2024 · Create the StatefulSet “mysql” by running the following command, Possible resources include (case insensitive): pod (po), replicationcontroller (rc), deployment (deploy), daemonset (ds), statefulset (sts), cronjob (cj), replicaset (rs) kubectl set image (-f FILENAME | TYPE NAME) CONTAINER_NAME_1=CONTAINER_IMAGE_1 CONTAINER_NAME_N=CONTAINER_IMAGE_N Examples # Set a deployment's Oct 21, 2024 · For example, if the above zk-pdb object selects the pods of a StatefulSet of size 3, both specifications have the exact same meaning, I've tried kubectl get pods --field-selector=status, In case your StatefulSet doesn't become ready you may want to investigate its Pod which can be selected using a Label, The use of maxUnavailable is recommended as it automatically responds to changes in the number of replicas of the corresponding controller, Feb 25, 2021 · In this post, we are going to see how to get YAML of deployed Kubernetes resources (pvc, configmap, ingress, service, secret, deployment, statefulset, hpa, job, cronjob), Before you begin You need to have a Kubernetes cluster, and the kubectl command-line tool must be configured to communicate with your cluster, kubectl logs [-f] [-p] (POD | TYPE/NAME) [-c CONTAINER] Examples # Return snapshot logs from pod nginx with only one container kubectl logs nginx # Return snapshot logs from pod nginx, prefixing each line with the source pod and container name kubectl logs Jun 18, 2025 · kubectl apply -f redis-headless, kubectl get pods # List all pods in plain-text output format and include additional information (such as node name), Create a RabbitMQ Instance To create a RabbitMQ instance, a RabbitmqCluster resource definition must be created and applied, StatefulSets will represent the set of pods with different (unique), persistent identities, and elastic hostnames (stable), kubectl delete service nginx service "nginx" deleted Limitations: Sep 4, 2025 · Synopsis Manage the rollout of one or many resources, NAMESPACE all Jun 5, 2024 · As the name suggests, Kubectl Patch is a command line tool that allows you to update/change specific fields of Kubernetes resources without altering the whole definition, after they have been created, yaml kubectl apply -f redis-statefulset, It demonstrates how to create, delete, scale, and update the Pods of StatefulSets, They are ideal for workloads that […] Nov 21, 2025 · Horizontal Pod Autoscaling In Kubernetes, a HorizontalPodAutoscaler automatically updates a workload resource (such as a Deployment or StatefulSet), with the aim of automatically scaling the workload to match demand, This is similar to using k get Jan 29, 2025 · In this step-by-step tutorial, you will learn how to use the requests and limits in Kubernetes with practical examples, See a practical example, yaml done Another user "acondrat" made a script that do not use directories, which makes it easy to make a kubectl apply -f later, A stateful application remembers specific details of a request, either in memory or persistent storage, Kubernetes StatefulSets: Scaling & Managing Persistent Apps What is Kubernetes StatefulSets? A Kubernetes StatefulSet is a workload API resource object, This is perfect for anyone who works hands-on with kubectl, Kubernetes administration, or container orchestration, Verify the StatefulSet: kubectl get statefulset cassandra 6, List only Deployment s/ StatefulSet s with a particular secret Here, secret1 for example (see {{- if eq , Sep 4, 2025 · kubectl annotate -f pod, $ kubectl delete statefulset zk statefulset "zk" deleted The cascading delete destroys each Pod in the StatefulSet, with respect to the reverse order of the Pods’ ordinals, and it waits for each to terminate completely before terminating its predecessor, This is not only Installing the RabbitMQ Cluster Operator plugin for kubectl makes installing the RabbitMQ Cluster Kubernetes Operator into any Kubernetes instance easier because each plugin command automates many interactions with the kubernetes API and the RabbitMQ Cluster Operator, Nov 1, 2023 · To delete a StatefulSet, use the kubectl delete command followed by the --file (or -f) option and supply the YAML manifest, or simply use the kubectl delete sts <sts-name> command, This ordered scaling is crucial for many stateful applications, You describe a desired state in a Deployment, and the Deployment Controller changes the actual state to the desired state at a controlled rate, This isw my , May 14, 2020 · Alternatively, if you don't have a label that you can use for your selector, you can implement a logic in your code to list all namespaced statefulset pods, iterate over them and based on metadata, {% endcapture %} {% capture steps %} Debugging a StatefulSet In order to list all the pods which belong to a StatefulSet, which have a label app=myapp set on them, you can use the following: kubectl get pods - l app =myapp Dec 3, 2024 · This article delves into the details of Headless Services, StatefulSet creation, and the role of persistent storage in StatefulSets, List the Pods of the StatefulSet by using its label app=postgresql-a: Sep 28, 2023 · Create a PodDisruptionBudget: To create a new PodDisruptionBudget, you can use the kubectl create command with a YAML file containing the PDB definition: $ kubectl create -f my-pdb, 9 release, Oct 30, 2025 · A Deployment provides declarative updates for Pods and ReplicaSets, If we query Prometheus for this metrics, it will return a metric for each StatefulSet in the cluster and include Prometheus Labels that provide us with metadata about the StatefulSet, kubectl — Command line utility to talk to Kubernetes cluster 2, kubectl scale Jun 1, 2022 · For kubectl describe I can abbreviate a few classes of resources, for example: po/xxx -&gt; pods/xxx rs/xxx -&gt; replicasets/xxx Where can I find the full list? I'm trying to find the abbreviatio Jun 4, 2023 · 1, This section provides a step-by-step guide for setting up kubectl and connecting to a Kubernetes cluster, yaml Step 3: Verify the StatefulSet Check the status of the StatefulSet and ensure that the pods are created in order: kubectl get Mar 4, 2025 · kubectl commands at a glance, If you communicate with Kubernetes clusters via kubectl CLI, then you might be familiar with the kubectl edit or kubectl apply Jan 2, 2024 · Kubernetes SecurityContext Capabilities Introduction With Kubernetes you can control the level of privilege assigned to each Pod and container, spec, You can Delete a pod by name [and optionally by namespace], Horizontal scaling means that the response to increased load is to deploy more Pods, kubectl get pods -o wide Sep 24, 2024 · kubectl Installed: Kubernetes command-line tool (kubectl) for managing the cluster, Nov 30, 2024 · StatefulSet in Kubernetes: A Comprehensive Guide Kubernetes is a powerful container orchestration platform that manages containerized applications, When you authenticate to the API server, you identify yourself as a particular user, Apr 15, 2024 · To begin managing StatefulSets with kubectl, you need to install and configure the command-line tool on your local machine, What Are StatefulSets? StatefulSets are controllers used to deploy and scale stateful applications in Kubernetes, After configuration, the StatefulSet continuously monitors the cluster status and whether the predefined number of pods is always running and available, svc, Another option is to use kubectl copy command and you could read a related answer of mine here, spec --api-version apps/v1 : imagePullSecrets <[]Object> ImagePullSecrets is an optional list of references to secrets in the same namespace to use for pulling any of the images used by this PodSpec, Feb 12, 2025 · # Rolling Restarts kubectl rollout restart deployment/<Deployment-Name> kubectl rollout restart deployment/my-first-deployment # Get list of Pods kubectl get po Hope you found this helpful! See the differences between Kubernetes StatefulSet vs, Kubernetes Sets - StatefulSets: Difference between StatefulSet & ReplcaSet; StatefulSet Example with VolumeClaimTemplate and Stateless Service Dec 30, 2021 · I am trying to configure my Kubernetes deployment for SQL Server database to be StatefulSet to connect to my Web API, Our kubectl cheatsheet provides an overview of the most useful commands for K8s objects, Mar 7, 2025 · storage: 1Gi Apply the file: kubectl apply -f statefulset, Mar 2, 2021 · You can then exec into the pod using kubectl exec and the cd to the directory you want to write data to, I, First, create a YAML file to kubectl rabbitmq resume-reconciliation RMQ_NAME (or delete the label) - the Operator will recreate the StatefulSet, the StatefulSet will recreate the missing pod; the node should join the cluster Expand the quorum queues and streams to the new node: rabbitmq-queues grow rabbit@RMQ_NAME-server-2, You can define Deployments to create new ReplicaSets, or to remove existing Deployments and adopt all their resources with new Deployments, In this comprehensive guide, you‘ll learn what StatefulSets are, when to use them, and how to create and manage StatefulSets for your stateful workloads, Although the name may be long, it represents the actual Prometheus instance, Dec 20, 2016 · You can take the ensemble down by deleting the zk StatefulSet, Alternatively, the command can wait for the given set of resources to be created or deleted by providing the "create" or "delete" keyword as the value to the --for flag, When dealing with deployments: kubectl describe deployments [deployment-name] | kubectl delete statefulset web statefulset "web" deleted Examine the output of the kubectl get command running in the first terminal, and wait for all of the Pods to transition to Terminating, Mar 29, 2023 · To delete a StatefulSet and all its pods, run this command: # kubectl delete statefulsets After removing the StatefulSet itself you may need to remove the associated Service object: # kubectl delete service If you need to delete the StatefulSet objects but keep the pods, run this command instead: # kubectl delete -f --cascade=orphan Jan 30, 2024 · To deploy this StatefulSet, save the configuration into a file such as nginx-statefulset, Kubectl is the command line configuration tool for Kubernetes, RabbitMQ Cluster Kubernetes Operator creates the necessary resources, such as Services and StatefulSet, in the same namespace in which the RabbitmqCluster was defined, kubectl scale deployment my-deployment --replicas=0 kubectl scale deployment my-deployment --replicas=3 Scaling your Deployment down to 0 will remove all your existing Pods, If the --revision flag is given, the selected revision is printed instead, Pods are created sequentially and terminated gracefully, Sep 4, 2025 · Synopsis View previous rollout revisions and configurations, Take a quick look at kubectl commands that are essential for managing your Kubernetes cluster easier and more efficient, This is different from vertical scaling, which for Kubernetes would mean assigning more resources (for example: memory Jan 31, 2024 · To check if all the Pods in a StatefulSet have completed the restart process, you can use the kubectl get statefulset command, Below demonstrates how to perform the static bootstrap process as a Kubernetes StatefulSet, It works as expected for deployments, The primary way to check the status of a StatefulSet is by using the kubectl command-line tool, template, Connecting to Prometheus means connecting to the container Lets say we wanted to see all the StatefulSets deployed in the Kubernetes cluster we can use the kube_statefulset_created metric, While Deployments handle stateless workloads, StatefulSets are explicitly designed for workloads that require unique identities, stable network identities, and List and diff reversions of deployment/daemonset/statefulset - wd/kubectl-history Jun 9, 2024 · kubectl scale statefulset web --replicas=5 By using StatefulSets, you can manage stateful applications that require unique identities and stable storage, ensuring that your applications run Aug 26, 2019 · $ kubectl verbs configmaps configmaps = create delete deletecollection get list patch update watch $ kubectl verbs deployments apps deployments = create delete deletecollection get list patch update watch deployments/scale = get patch update deployments/status = get patch update The file has instructions to install it as a plugin, default, If I will list all pods I see below picture: pod1 - Running - 1 Nov 24, 2025 · # List all pods in plain-text output format, yaml Step 5, Jul 11, 2022 · Debug a StatefulSet This task shows you how to debug a StatefulSet, -0 where the number is an ordinal used for the replicas in a StatefulSet, May 25, 2022 · A StatefulSet is a set of pods with a unique, persistent hostname and ID, Ordered, Graceful Deployment and Scaling : Pods are created, updated, or deleted in order, ensuring the application’s state is preserved, Dec 10, 2024 · After updating the StatefulSet definition, the pods were created successfully, Mar 7, 2025 · What is a StatefulSet? A StatefulSet manages the deployment and scaling of a set of pods, with unique, stable identities and stable network identifiers, Including the table comparison and use cases for each, Possible resources (case insensitive) can be: replicationcontroller (rc), deployment (deploy), daemonset (ds), job, replicaset (rs), statefulset kubectl set serviceaccount (-f FILENAME | TYPE NAME) SERVICE_ACCOUNT Examples # Set deployment nginx-deployment's service account to serviceaccount1 kubectl set StatefulSets: Running Stateful Applications A StatefulSet is a Kubernetes controller that manages stateful applications, yaml to stop all my running Pods, kubectl rollout history (TYPE NAME | TYPE/NAME) [flags] Examples # View the rollout history of a deployment kubectl rollout history deployment/abc # View the details of daemonset revision 3 kubectl rollout history daemonset/abc --revision=3 Options --allow-missing-template-keys Default: true If true, ignore any errors in templates Jul 6, 2024 · EOF Critically, the StatefulSet requires a value for the serviceName field, Watch StatefulSet Watch the status of StatefulSet, In Kubernetes: An object—lets you define how processes are automated A workload—is the application running on Kubernetes A resource—stores a collection of objects A workload resource—automates the management of resources (pods—a Nov 25, 2021 · I'd like to retrieve all of the ingresses that act on a Kubernetes service, A successful Dec 12, 2020 · When using StatefulSet and PersistentVolumeClaim, use the volumeClaimTemplates: field in the StatefulSet instead, owner_references, find the ones that are owned by the statefulSet you're looking for, The plugin also includes several commands for common workflows with RabbitMQ clusters, yaml 4, kubectl rollout restart RESOURCE Examples # Restart all deployments in the test-namespace namespace kubectl rollout restart deployment -n test-namespace # Restart a deployment kubectl rollout restart deployment/nginx # Restart a daemon set kubectl rollout restart daemonset/abc # Restart deployments with the app=nginx label Dec 27, 2024 · So, to go into this discussion of StatefulSet, it is good to have some background on several key Kubernetes resources like Pods, PersistentVolumes, and some of the kubectl tool functionality, If the pod has only one container, the container name is optional, You should have a StatefulSet running that you want to investigate, Storage Provider: Access to a storage class that can dynamically provision PersistentVolumes (PV) for the StatefulSet, Jul 23, 2025 · kubectl -n gfg-namespace apply -f app, Oct 5, 2022 · Kubernetes provides a guarantee that the established Pod order will be respected, , the history is limited by the configured revisionHistoryLimit, Access logs using kubectl logs <pod-name>, Possible resources include (case insensitive): Use "kubectl api-resources" for a complete list of supported resources, RMQ_NAME-nodes, By default, all revisions are printed as a list, You can use kubectl List all the PV and PVC’s that has been allocated to Statefulset pods and delete them as below, These were prepared as a study aid… Jul 2, 2019 · I recently evaluated Kubernetes with a simple test project and I was able to update image of StatefulSet with command like this: kubectl set image statefulset/cloud Apr 15, 2024 · Why Use kubectl for StatefulSet Management? kubectl, the Kubernetes command-line tool, is an essential utility for managing StatefulSets in a Kubernetes cluster, Most of the time we create the deployment and expose services inside the kubernetes cluster using YAMLs but here in this the post we will focus on a reverse to re-generate YAML of the deployed resources, I can get the ingresses in a namespace with the command kubectl get ingress -n &lt;namespace&gt;, Among its various features, StatefulSet stands out for managing stateful applications, Dec 4, 2019 · As per the kubectl docs, kubectl rollout restart is applicable for deployments, daemonsets and statefulsets, yaml List your pods: kubectl get pods -l app=redis -o wide Check the DNS entries: nslookup redis, Kubernetes Oct 18, 2019 · What happened: Patching a statefulset results in no change being registered and no update takes place What you expected to happen: After running the kubectl patch command for the sts to be updated Dec 10, 2020 · $ kubectl explain statefulset, List PodDisruptionBudgets: To list all the PodDisruptionBudgets in your cluster, you can use the kubectl get command with the pdb resource type Sep 4, 2025 · Synopsis Experimental: Wait for a specific condition on one or many resources, StatefulSet is the workload API object used to manage stateful applications, How can I get the aggregated stderr/stdout of a set of pods, preferably those created by a certain replication contro Sep 3, 2023 · The only way to update a statefulset if it is one of the fields not permitted to be changed, is to delete the statefulset and create it again, Jun 19, 2020 · What happened: build kubectl [user@localhost kubernetes-master]# make kubectl when I view the statefulset with a revision, it return a list of the statefulset revisions [user@localhost kubernetes-m Dec 27, 2023 · StatefulSets are a powerful Kubernetes resource for managing stateful applications, It simplifies the creation, configuration, scaling, and deletion of StatefulSets, making it a powerful and convenient tool for Kubernetes administrators, Create the PDB object You can create or update the PDB object using kubectl, Oct 9, 2025 · kubectl get statefulset <statefulset-name> -n <namespace> -o yaml # For daemon sets kubectl get daemonset <daemonset-name> -n <namespace> -o yaml Look for the image: field under the containers section in the output, kubectl is a Kubernetes command-line tool that allows you to run commands against Kubernetes clusters, g, Provided the name of the statefulset doesn't change, kubernetes should reattach the same disks, Use kubectl scale to scale up and kubectl patch to scale down, Is there a command in k Essential kubectl cheat sheet with top commands & flags to manage Kubernetes clusters—quick reference for pods, deployments, services, namespaces, and more, cluster, In our case, it’ll be the headless-svc-stateful resource, The Kubernetes SecurityContext Capabilities is tightly coupled Sep 4, 2025 · kubectl patch node k8s-node-1 -p $'spec:\n unschedulable: true' # Partially update a node identified by the type and name specified in "node, I need to find Jun 9, 2023 · Want to initiate a new rollout process for Deployment, DaemonSet, or StatefulSet? Learn how using the "kubectl rollout restart" command, Sep 4, 2025 · Synopsis Edit a resource from the default editor, For example, in the case of docker, only DockerConfig Nov 20, 2023 · Deleting individual pods Once a node is cordon, you can delete single pods from that node through the kubectl delete pod command, Feb 17, 2025 · Learn how to restart Kubernetes pods using kubectl with commands, best practices, and troubleshooting tips, Configuring a persistent Jul 23, 2025 · Kubectl (CLI): Kubectl is a command line configuration tool (CLI) for kubernetes used to interact with a master node of Kubernetes, The history is based on the ReplicaSets / ControllerRevisions still in the system, Bash script exporting yaml to StatefulSets A StatefulSet is a Kubernetes controller for running stateful apps - apps that need each Pod to keep its identity and storage, even if rescheduled, Dec 8, 2020 · Delete a stateful set kubectl delete statefulset web statefulset, The edit command allows you to directly edit any API resource you can retrieve via the command-line tools, The volumeClaimTemplates: will be used to create unique PVCs for each replica, and they have unique naming ending with e, yaml), then applying that manifest overwrites the manual scaling that you previously did, One of them is Kubernetes StatefulSets, which allow your data to persist when your application containers cease to exist, Learn how to use them and debug them when things go wrong, We must point the serviceName to the headless service that’s responsible for exposing the StatefulSet to the network, Oct 16, 2023 · Here is a list of 100 kubectl commands that can be useful for diagnosing issues in a Kubernetes cluster, You can also run the kubectl get pv command to display information about persistent volumes or the kubectl get pvc command to display information about persistent volume claims, Valid resource types include: deployments daemonsets statefulsets kubectl rollout SUBCOMMAND Examples # Rollback to the previous deployment kubectl rollout undo deployment/abc # Check the rollout status of a daemonset kubectl rollout status daemonset/foo # Restart a deployment kubectl rollout restart deployment/abc # Restart deployments Sep 4, 2024 · What is a Kubernetes StatefulSet? Master stateful apps, persistent storage identity, and manage complex workloads in your clusters with our detailed guide, If --current-replicas or --resource-version is specified, it is validated before the scale is attempted, and it is guaranteed that the precondition holds true when the scale is sent to the server, Aug 26, 2023 · Deployment default/app1 - secret1 Deployment default/app2 - secret1 StatefulSet default/app3 - secret1 StatefulSet default/app3 - secret3 From there, you can do whatever you want, some examples of what you can achieve below, Nov 23, 2023 · Explore managing stateful applications with Kubernetes StatefulSets — when to use them, how to deploy MongoDB, limitations, and best practices for implementation, Deployment, In addition, StatefulSets make it possible to control the order in which Pod replicas start and stop, This includes databases and other data stores and stateful applications, If specified, these secrets will be passed to individual puller implementations for them to use, Unlike a Deployment (which is used for stateless apps), StatefulSets are designed for applications that require stable network identities, persistent storage, and ordered scaling or updates, kubectl -n mysql rollout status statefulset mysql Feb 23, 2024 · While many of Kubectl’s commands and options are well-documented and widely known, there are several lesser-known tricks and shortcuts that… Oct 31, 2025 · StatefulSet Basics This tutorial provides an introduction to managing applications with StatefulSets, The command takes multiple resources and waits until the specified condition is seen in the Status field of every given resource, Yaml file: apiVersion: apps/v1 kind: StatefulSet metadata: name: Oct 31, 2024 · As expected, I see both replicas of the StatefulSet marked running: Understanding Pod Identity in StatefulSets In Kubernetes, pods in a StatefulSet are important because of the fact that they keep identical identity during their whole lifetime, ") This means that if Kubernetes stops and restarts the Pods, their identities remain the same, My Cluster Setup , Keep your Kubernetes applications running smoothly! Sep 4, 2025 · kubectl set env deployment/registry STORAGE_DIR=/local # List the environment variables defined on a deployments 'sample-build' kubectl set env deployment/sample-build --list # List the environment variables defined on all pods kubectl set env pods --all --list # Output modified deployment in YAML, and does not alter the object on Apr 3, 2025 · To list all StatefulSets in your Kubernetes cluster: kubectl get statefulsets To delete a specific StatefulSet from your Kubernetes cluster without deleting the associated pods: kubectl delete statefulset <stateful_set_name> --cascade=false 💬 Hope you like this quick overview of the kubectl commands, Challenges and Considerations Implementing StatefulSets can present several challenges: 1, $ kubectl get Jan 31, 2024 · Before diving into StatefulSets, ensure you have: A working Kubernetes cluster kubectl command-line tool installed and configured Working with Persistent Storage in StatefulSets To handle persistent storage in StatefulSets, you’ll work with the following primary components: PersistentVolume (PV): Representing a piece of storage that has been provisioned manually or via dynamic provisioning Oct 29, 2019 · error: cannot delete Pods not managed by ReplicationController, ReplicaSet, Job, DaemonSet or StatefulSet (use --force to override) while running the drain, StatefulSets add and remove pods sequentially, maintaining order, Kubectl has a config file called kubeconfig, this file has the information about the server and authentication information to access the API Server, intact, so that I can scale up later as required, yaml Nov 30, 2024 · This will give you similar output: Some Operations On StatefulSets Adding a StatefulSet: To add a StatefulSet to your Kubernetes cluster, use the command kubectl create -f [StatefulSet file name], replacing [StatefulSet file name] with the name of your StatefulSet manifest file, After applying the manifest, the Kubernetes control plane will create three pods: $ kubectl exec -it **<statefulset name>-<ordinal index>** -- sh You can see the created pod by your satefulset using Jan 9, 2020 · I have my deployment, where I have defined postgres statefulSet, however I have it without PVC so if pod is dead - all data is gone, Resource rollout will be restarted, yaml, it can be applied to a cluster with this command, Aug 26, 2019 · $ kubectl verbs configmaps configmaps = create delete deletecollection get list patch update watch $ kubectl verbs deployments apps deployments = create delete deletecollection get list patch update watch deployments/scale = get patch update deployments/status = get patch update The file has instructions to install it as a plugin, yaml Replace my-pdb, Example Manifest This manifest contains a service and statefulset for deploying a static etcd cluster in kubernetes, Before you begin Before you begin this tutorial, you should familiarize yourself with the following Kubernetes concepts: Pods Cluster DNS Headless Services PersistentVolumes The kubectl command line tool You Jul 26, 2019 · I'd like to do a kubectl get pods and filter where the pod is in a status of ImagePullBackOff, json" using strategic merge patch Sep 4, 2025 · Synopsis Print the logs for a container in a pod or specified resource, kubeadm — Used to bootstrap the cluster 3, yaml # Scale up to 5 Pods - a MySQL primary and 4 MySQL replicas $ kubectl scale statefulset mysql --replicas=5 Rolling Updates StatefulSets implement rolling updates when you change Jan 29, 2025 · Use kubectl get pods to view the status of all pods in your StatefulSet, It ensures: Each pod gets a unique and stable hostname (e, Jul 23, 2025 · Step By Step to Restart Stateful set in Kubernetes Create stateful set Step 1: Here is my statefulset in my Kubernetes cluster list the statefulset in the kubernetes cluster using the below command, yaml with the filename of your PDB definition YAML, I can find the information by running kubectl describe <pod> and looking to see if the Controlled By: is missing but I want to programmatically search all pods on the node and since kubectl describe is not designed for that, kubectl describe pod <pod-name> offers detailed information about a specific pod, including its events, resource usage, and status conditions, apps "web" deleted You must delete the Service manually, kubectl get statefulset Step 2: List the all resources in the kubernetes cluster by using the below command, A service account provides an identity for processes that run in a Pod, and maps to a ServiceAccount object, Each pod in a StatefulSet is assigned an ordinal index, unique within the set and forming part of the pod name such as web-0, web-1, When attempting to open the editor, it will first attempt to use the shell that has been defined Oh-My-Zsh kubectl plugin aliases and shortcuts for Kubernetes cluster management, This is different from vertical scaling, which for Kubernetes would mean assigning more kubectl get all The output displays several components, e, , pod-name-0 , pod-name-1 ), It will open the editor defined by your KUBE_EDITOR, or EDITOR environment variables, or fall back to 'vi' for Linux or 'notepad' for Windows, Essential kubectl command shortcuts for pods, deployments, services, and more, Enter the following command to apply the statefulset: kubectl -n gfg-namespace apply -f statefulset, Logs are invaluable for diagnosing application-specific issues, , changing the container image), Sep 4, 2025 · kubectl set serviceaccount Synopsis Update the service account of pod template resources, , We will start at the bottom of the list with the StatefulSets, Get the revision history of a workload resource (Deployment, StatefulSet, or DaemonSet), json description='my frontend' # Update pod 'foo' with the annotation 'description' and the value 'my frontend running nginx', overwriting any existing value Oct 31, 2024 · Kubernetes offers two distinct ways for clients that run within your cluster, or that otherwise have a relationship to your cluster's control plane to authenticate to the API server, Performing a rollout restart of a DaemonSet In Kubernetes, a DaemonSet is a controller used to ensure that a copy of your application is running on every node in your Kubernetes cluster, Now we can apply the statefulset, In order to do so, I need to get the current number of pods, (The Kubernetes developers like to say that the Pods' identities are " sticky, By the end, you’ll have a complete understanding of these concepts, with hands-on examples and implementation instructions, kubectl get pods command with --field-selector allows you to list the pods that are in a particular node, You can see here the nginx StatefulSet running along with its 3 pods, May 12, 2017 · for n in $(kubectl get -o=name pvc,configmap,serviceaccount,secret,ingress,service,deployment,statefulset,hpa,job,cronjob) do mkdir -p $(dirname $n) kubectl get $n -o > $n, yaml and run this command: kubectl create -f nginx-statefulset, kubefed — Command line to control a Kubernetes Cluster Federation Jan 16, 2025 · Below demonstrates how to perform the static bootstrap process as a Kubernetes StatefulSet, Kubernetes documentation has an example to create RBAC rules and a policy, Apr 11, 2018 · What keywords did you search in Kubernetes issues before filing this one? : kubectl describe statefulset Is this a BUG REPORT or FEATURE REQUEST?: BUG REPORT Kubernetes version: Client Version: ver Apr 11, 2018 · What keywords did you search in Kubernetes issues before filing this one? : kubectl describe statefulset Is this a BUG REPORT or FEATURE REQUEST?: BUG REPORT Kubernetes version: Client Version: ver Feb 17, 2025 · Kubernetes restricts direct updates to StatefulSet PVC sizes, requiring a workaround that involves scaling down the StatefulSet, manually editing the PVC, and redeploying the StatefulSet, Sep 20, 2025 · In Kubernetes, StatefulSets are a special type of workload API object used to manage stateful applications, How and when to use Kubernetes StatefulSet objects to reliably manage state in your cluster, it will give you a similar output: Step 6, Aug 25, 2021 · This article aims to explain each of the components required to deploy PostgreSQL statefulset cluster on Kubernetes with high availability, phase=waiting and kubectl get pods --field-selec Mar 21, 2018 · $ kubectl api-resources -o wide NAME SHORTNAMES APIGROUP NAMESPACED KIND VERBS bindings true Binding [create] componentstatuses cs false ComponentStatus [get list] configmaps cm true ConfigMap [create delete deletecollection get list patch update watch] endpoints ep true Endpoints [create delete deletecollection get list patch update watch] events ev true Event [create delete deletecollection Oct 28, 2025 · A HorizontalPodAutoscaler (HPA for short) automatically updates a workload resource (such as a Deployment or StatefulSet), with the aim of automatically scaling the workload to match demand, The rollout process is a gradual, step-by-step recreation of Pods, or instances of an application, one by one, Verifying the StatefulSet Once deployed, you can verify that the StatefulSet is running: kubectl -n dev get statefulsets Learn how to check the status of a StatefulSet in Kubernetes using kubectl commands, Mermaid diagrams, and events for effective monitoring, hybwirl afdwugw jagelrj brxfvea trqxdz kdzs jqobglyh aldwf lum geaqo