DaemonSets vs StatefulSets. apiVersion: extensions/v1beta1 ->. Although Kubernetes is best known for running applications, it's also capable of running databases. Remember to adjust output-elasticsearch. How Deployments, Statefulsets & Daemonsets work. It manages the deployment and scaling of a set of Pods, and provides guarantee about the ordering and uniqueness of these Pods. If the StatefulSet is scaled down to one replica, mysql-3 is guaranteed to exit first, followed by mysql-2. Deployments #kubernetes #replicaset #statefulset #daemonset #deployments #comparsion is difference between DaemonSet and StatefulSet? › Statefulsets is used for Stateful applications, each replica of the pod will have its own state, and will be using its own Volume. Once a PV is claimed by an STS replica. kubectl autoscale: This command is used to automatically scale the number of replicas for a deployment based on resource usage. 1. Uses Kube state metrics and cAdvisor metrics (741)In this example: A Deployment named nginx-deployment is created, indicated by the . Before we move on to the objective, here are some basics. apps "es-cluster" created Check the data through the curl request sent to one the Elastic pods. yaml. Gère le déploiement et la mise à l'échelle d'un ensemble de Pods, et fournit des garanties sur l'ordre et l'unicité de ces Pods. We can use the cascade=false flag in the kubectl delete command to only delete the DaemonSet without deleting the pods. As the name suggest the statefulsets are specifically used to make sure the app state is saved by each running pod. In a stateful containerized application, data must be persistent, retained and easy to access outside the application. metadata. Taints are the opposite -- they allow a node to repel a set of pods. Deployment vs. Although they had ReplicaSet, DaemonSet is the K8 object they added. This page shows how to delete Pods which are part of a stateful set, and explains the considerations to keep in mind when doing so. 0. 0 API server with these resources. In statefulsets each replica pod created has an index number starting from 0 and it will only setup the next replica if the previous one is running. Persistent storage: Kubernetes StatefulSet can manage the creation and deletion of PVCs while. 10 min read. A DaemonSet allows you to overcome Kubernetes’ scheduling limitations and makes sure that a specific app gets deployed on all the nodes within the cluster. If you need to monitor Services, Endpoints, or Ingresses, use a StatefulSet. The identity sticks to the pod, regardless of which node it’s scheduled on. All existing persisted objects are accessible via the new API; Notable changes: spec. kubectl get daemonset -n opentelemetry. If you need to scale to (very) large clusters, and handle more traffic than a "small" StatefulSet can handle, use a Daemonset. This application is a replicated MySQL database. Identities are defined as: - Network: A single stable DNS and hostname. Before you begin This task assumes you have an application running on your cluster represented by a StatefulSet. kubectl --dry-run is a feature in kubectl that allows you to preview the changes that would be made to your cluster before actually applying them. Images may be defined in the values. Now, we have upgraded our cluster to Istio 1. DaemonSet controllers disregard the schedulable status of your Nodes. Stateful and Stateless Applications. 스테이트풀셋은. yaml using your favorite editor, such as nano: nano kube-logging. One problem occurs when a container crashes or is stopped. Next, tell Kubernetes to drain the node: kubectl drain --ignore-daemonsets <node name>. Namespace in Kubernetes can be compared to the concept of separate dining areas or private rooms in a restaurant. It manages the deployment and scaling of a set of pods, and provides a guarantee of ordering and uniqueness of the pods. Download Lens Desktop from the Lens web site for macOS. DoK #49 Deployments vs. For example, enter fluentd in the search box and press Enter. 1. Trying out your clustered data store. 4. Get Full-Length High-Quality DevOps Tutorials for Free - Subscribe Now. StatefulSets are for stateful applications, where the identity of a Pod matters. kubectl get statefulsets. For security reasons, only cluster administrators can create daemonsets. Implementando en Kubernetes: Deployment vs StatefulSet vs DaemonSet. Deployments #kubernetes #replicaset #statefulset #daemonset #deployments #comparsion and events: Deploy Grafana Agent ConfigMap and StatefulSet Create Grafana Agent ConfigMap. kubectl scale sts quarkus-statefulset --replicas=3. You can also use a preexisting disk in a StatefulSet. Guy is a developer & trainer with more than 25 years of experience. In the same manifest YAML file, you can also create the headless service that the StatefulSet uses. Let’s talk about our final set type: a DaemonSet. Although individual Pods in a StatefulSet are susceptible to failure, the persistent Pod identifiers make it easier to match existing volumes to the new Pods that replace any that have failed. Deleting a DaemonSet is a simple task. The extensions/v1beta1 and apps/v1beta2 API versions of DaemonSet are no longer served as of v1. Run. Can be resource inefficient - if the nodes have different workloads, the configuration for the pods in the DaemonSet would have to be based off the most demanding node in the cluster. CLB — Layer 4/7 (HTTP/TCP/SSL traffic), Legacy, Avoid. 10. A Daemonset will not run more than one replica per node. statefulset. StatefulSet和Deployment类似，一个StatefulSet也同样管理着基于相同容器规范的Pod。不同的是，StatefulSet为每个Pod维护了一个粘性标识。这些Pod是根据相同的规范创建的，但是不可互换，每个Pod都有一个持久的标识符，在重新调度时也会保留，一般格式为StatefulSetName-Number。For a StatefulSet with N replicas, when Pods are being deployed, they are created sequentially, in order from {0. A DaemonSet ensures that all (or some) Nodes run a copy of a Pod. Example-1: Create pre-install and pod-install pod. StatefulSets can be used to create pods with a guaranteed start-up order and unique identifiers. test: kubernetes readiness exec commandNow we have REPLACED the above file with a deployment. This blog describes the two features namely minReadySeconds for StatefulSets and maxSurge for DaemonSets that SIG Apps is happy to graduate to stable in Kubernetes 1. ; The Linode block storage was used in the volumeClaimTemplates. Introduction What is Kruise Rollouts? Kruise Rollouts is a Bypass component that offers Advanced Progressive Delivery Features. As nodes are added to the cluster, bookie pods are added automatically to them. As nodes are added to the cluster, bookie pods are added automatically to them. StatefulSets are a type of controller that manages the deployment and scaling of stateful applications, such as databases or other distributed systems, in a Kubernetes cluster. kubectl proxy - Run a proxy to the Kubernetes API server. The image is already pushed at docker. 10. kubectl rollout - Manage the rollout of a resource. Creating Persistent Disks to Store our Images and Themes. Unlike a DaemonSet, which runs a single pod on each node, a StatefulSet maintains a unique identity for each pod it manages and ensures that the pods are started and terminated in a specific. It creates. StatefulSet. It will trigger them all at once. In contrast to that, the Pods. Dig Deeper on IT systems management. 9. Deployments #kubernetes #replicaset #statefulset #daemonset #deployments #comparsion ALB vs NLB in AWS — Application load balancer vs Network load balancer. This behavior doesn't apply when the entire StatefulSet is deleted and can be disabled by setting a StatefulSet's . "Cannot Delete DaemonSet-managed Pods" Pods that are part of daemon sets pose a challenge to evictions. node-exporter will be installed as a DaemonSet. Like other controllers, DaemonSets manage groups of replicated Pods. image-pull-policy: kubernetes pods imagePullPolicy kompose. A StatefulSet is useful in guaranteeing order and uniqueness of pods, by keeping a persistent identity of each pod using unique naming conventions. If a taint with the NoExecute effect is added to a node, any pods that do not tolerate the taint are evicted immediately (pods that do tolerate the taint are not evicted). Karpenter is best used for clusters with workloads that encounter periods of high, spiky demand or have diverse compute requirements. The user can specify a different scheduler for the Pods of the DaemonSet, by setting the . It is primarily for internal use by controllers. This might not directly apply to your situation but I hope. Al igual que un Deployment, un StatefulSet gestiona Pods que se. These pods are made to identical specifications, but they are not interchangeable; rather, each one has a unique identity that it keeps throughout any rescheduling. A DaemonSet defines Pods that provide facilities that are local to a specific node ; for example, a driver that lets containers on that node access a storage system. The Kubernetes State Metrics Core check leverages kube-state-metrics version 2+ and includes major performance and tagging improvements compared to the legacy kubernetes_state check. kubectl create deploy nginx --image=nginx --dry-run -o yaml > nginx-ds. As far as a Deployment is concerned, Pods are interchangeable. kubectl get daemonset – List one or more daemonsets. Melakukan proses manajemen deployment dan scaling dari sebuah set Pods, serta menjamin mekanisme ordering dan keunikan dari Pod ini. 0 or 2. kubectl describe daemonset <daemonset-name>: This command retrieves detailed information about a specific DaemonSet, including its status, events, and the pods it is managing. 2 or later requires YAML 2. Deployment. Deleting a DaemonSet will clean up the pods it created. 2. Share. To learn more, see our documentation on active series and DPM. Caching Systems: StatefulSets can be used to deploy caching systems in Kubernetes, as they provide stable network identities, persistent storage, and predictable deployment and scaling. DaemonSet is a top-level resource in the Kubernetes REST API. Kubernetes provides robust mechanisms for deploying stateful applications - mainly the StatefulSet and DaemonSet controllers. Daemonset is a kind of a Stateful set, and it is not possible, to achieve the same functionality, the Daemonset offers, with statefulsets. So StatefulSet with 3 replicas will create 3 pods, each. Cái tên StatefulSet là một cái tên dễ gây nhầm lẫn, nhất là với những bạn làm DevOps không tham gia nhiều vào Software Development. A DaemonSet is typically described using a YAML file. As nodes are removed from the cluster, those bookie pods are garbage collected. On an update the existing Pods will get deleted and recreated. A StatefulSet is a higher-level concept that provides a declarative way to manage stateful applications. However, the following command will give a clean daemonset manifest considering that "apps/v1" is the api. To do this, we will focus our attention on the containers of the same kind and workload (being workload a deployment, daemonset, statefulset, etc. field to . Concepts Workloads Workload Resources DaemonSet DaemonSet A DaemonSet ensures that all (or some) Nodes run a copy of a Pod. kubectl scale daemonset sample-daemonset -. If you want to run one pod on each node in cluster, you may use DaemonSet, which was created exactly for this purpose. Verify that the daemonset Collector is up and running, You should see one pod in “ready” state for each node on your cluster. You describe a DaemonSet by using a YAML file, and then create it using the kubectl create or kubectl apply commands (for example, kubectl create –f example-daemon. Now, if I add tolerations to my container configurations in a StatefulSet if will be common for all pods of my StatefulSet and would schedule all pods on a node with matching taint. Chạy log collector daemon trên mỗi node như fluentd hoặc logstash. kube-state-metrics, an add-on agent that listens to the Kubernetes API server and generates metrics about the state of Kubernetes objects like Deployments and Pods. DaemonSet; StatefulSet; Images. Additionally, we are creating a Persistent Volume using the volumeClaimTemplate and using it in the StatefulSet to store the PostgreSQL data. 0. V tutorialu popisujeme 3 různé způsoby (Deployment, StatefulSet a DaemonSet), jak provádíme deploy aplikací v K8s – včetně praktické ukázky. PAN-OS 10. Some typical uses of a DaemonSet are:Implement distributed tracing with Jaeger & Opentelemetry on Kubernetes #kubernetes #distributedtracing #opentelemetry #jaeger #microservices…NOTE: DaemonSet vs StatefulSet. Now that the DaemonSet is in place, you might want to scale the number of pod instances. With RollingUpdate update strategy, after you update a DaemonSet template, old DaemonSet pods will be killed, and new DaemonSet pods will be created automatically, in a controlled fashion. 23 introduced a new, alpha-level policy for StatefulSets that controls the lifetime of PersistentVolumeClaims (PVCs) generated from the StatefulSet spec template for cases when they should be deleted automatically when the StatefulSet is deleted or pods in the StatefulSet are scaled down. 1. Likewise, StatefulSets are a great choice for assigning unique resources to containers and maintaining application state. ReplicaSet vs. Deploy Istio and validate its installation. What problem does this solve? A StatefulSet spec can include. Ordering: Kubernetes StatefulSet ensures that each pod is created in a specific order, while Deployment does not. Last modified August 24, 2023 at 6:38 PM PST: Use code_sample shortcode instead of code shortcode (e8b136c3b3) A DaemonSet defines Pods that provide node-local facilities. Author: Matthew Cary (Google) Kubernetes v1. DaemonSets are designed to run background services that are required by the other containers in the cluster, such as logging and monitoring agents, while. yaml. The Deployment creates a ReplicaSet that creates three replicated Pods, indicated by the . NAME READY STATUS RESTARTS AGE web-0 1/1 Running 0 1m web-1 1/1 Running 0 1m As mentioned in the StatefulSets concept, the Pods in a StatefulSet have a sticky, unique identity. StatefulSet (STS) PersistentVolume (PV) PersistentVolumeClaim (PVC) STSs schedule stateful pods, which can claim PVs through PVCs and mount them as volumes. They are used for very special use cases like. Gestiona el despliegue y escalado de un conjunto de Pods, y garantiza el orden y unicidad de dichos Pods. RollingUpdate: This is the default update strategy. When a replica is first created, the Kubernetes control plane creates a PVC for that replica if one does not already exist. The StatefulSet API object is used to handle stateful applications. Specify a name for the DaemonSet (for example, demo-daemonset), select a project, and click Next. yaml. It manages the deployment and scaling of a set of pods and provides guarantees about the. Tolerations allow the scheduler to schedule pods with matching taints. Summary. 1. I’ve seen confusion around what a Deployment vs. Example-1: Using allowedCapabilities in Pod Security Policy. But I still have hard time understanding of what is the best to use for prometheus agent. Deploy Elasticsearch. Although, in this case, we won’t specify the storageClassName, as Kubernetes will use the default one when it’s omitted. 101 1 6. You can check it as follows. A StatefulSet is a group of pods with persistent identities and stable hostnames, designed to run stateful and replicated Kubernetes services. namespaces. Nếu chúng ta không chỉ định param completions thì sẽ sẽ chạy liên tục không dừng lại. You can use --help after the subcommand to get additional info about possible parameters (for example: kubectl get nodes --help). StatefulSet vs. $ kubectl drain foo --grace-period=900 Options: --delete-emptydir-data=false: Continue even. This Collector will scrape all pods that are annotated with the prometheus. Each has their own semantics. Gestiona el despliegue y escalado de un conjunto de Pods, y garantiza el orden y unicidad de dichos Pods. It manages the deployment and scaling of a set of pods, and provides a guarantee of ordering and uniqueness of the pods. Conforme se añade más nodos al clúster, nuevos Pods son añadidos a los mismos. During a crash, kubelet restarts the. Thanks for your reply @cperez08. The upgrade process is as follows: Creation of the new cluster inside the same Virtual Private Cloud (VPC) Bootstrap of cluster. Parallel. 10. Let’s start by looking at the difference between a stateful and stateless application. The DaemonSet monitors the health of the pod and automatically reschedules it in the event of a failure or a change in the cluster, such as the addition or removal of nodes. The solution(s) : Use a StatefulSet, ReplicaSet or DaemonSet to ensure the Pod creation after a Node failure. Workloads. Some typical uses of a DaemonSet are: running a cluster storage daemon, such as glusterd. . Get a shell into the running Container: kubectl exec -it security-context-demo-2 -- sh. apiVersion: apps/v1beta1 kind: StatefulSet metadata: labels: app:. So in the end I created a statefulset of node. disable: kubernetes readiness disable kompose. Understanding ReplicaSet vs. service. The scheduler will schedule the pods on any node depending upon the free resources. You can use DaemonSet to run a cluster storage, log collection, and node monitoring demon on each node. It should not use the tags latest, head, canary, or other tags that are designed to be "floating". StatefulSet (stable-GA in k8s v1. Watch the presentation below given by Ali Kahoot, DevOps Engineer & Trainer at Tarabut Gateway. The StatefulSet guarantees that a given network identity will always map to the same storage identity. Unlike a Deployment, a StatefulSet has a persistent ID for each Pod that persists across any rescheduling or restarts. Understanding ReplicaSet vs. It is a Kubernetes resource, to manage stateful applications. We will select the value of the container that consumed the most in each moment. Chạy monitoring daemon trên mỗi node như Prometheus Node Exporter hoặc Datadog agent. DaemonSet vs. This is the same behavior of DaemonSet in Kubernetes version 1. Deployment では、全てのPodで1個のPV をマウントしている違いがあります. PVC: Every replica of a StatefulSet will have its own state, and each of the pods will be creating its own PVC (Persistent Volume Claim). Identities are defined as: Network: A single stable DNS and hostname. Pods deployed by Deployment are identical and interchangeable, created in random order with random hashes in their Pod names. You might set the Deployment to have replicas: 3 so that if one of them fails the other two can pick up the load. Statefulset; daemonset; In this blog, we will be focusing on Deployment and Statefulset, Key Takeaways: How deployment and Statefulset works; What is the differnece between them; Deployment. Controller - StatefulSet. This behavior will help you separate the storage using one PVC. We just published a 6-hour course on the freeCodeCamp. Nếu param backoffLimit không được setting thì mặc định của nó là 6. See Pod Name Label in the StatefulSet topic for. Using allowPrivilegeEscalation with Kubernetes SecurityContext. To check your version of Kubernetes, run kubectl version. In case of any updates from other sources. Creating a StatefulSet. Manages the deployment and scaling of a set of Pods, and provides guarantees about the ordering and uniqueness of these Pods. Do the traffic switch. This is useful if you. To create a service, use the kubectl expose command. StatefulSet vs. Al igual que un Deployment, un StatefulSet gestiona Pods que se basan en una especificación idéntica de contenedor. readiness. NOTE: DaemonSet vs StatefulSet. Step 3: Set a Pod. Whenever a node is added to the cluster, the DaemonSet controller checks if it is. 1. If the StatefulSet is scaled down to one replica, mysql-3 is guaranteed to exit first, followed by mysql-2. Config, h * Client) (* AppsV1Client, error) NewForConfigAndClient creates a new AppsV1Client for the given config and client. StatefulSet. DaemonSet, where one instance exists for each Kubernetes node StatefulSet , where an exact number of replicas should exist at all times, each with a predictable name ( collector-1 , collector-2 ,. If you want to provide workload persistence using Kubernetes persistent storage, you can incorporate a StatefulSet into. template. Scrape intervals lower than 60s may result in increased costs (DPM > 1). as with deployments. Use daemonsets to create shared storage, run a logging pod on every node in your cluster, or deploy a monitoring agent on every node. When comparing a Deployment vs Replica Set, the former provides the same replication functions (through Replica Sets) and also the ability to rollout changes and roll them back if necessary. It takes the statefulset name and the desired number of replicas as arguments. yaml statefulset. StatefulSets. Most modern applications have some kind of logging mechanism. These controllers can be used to group pods together according to their runtime needs and define pod replication and pod start up ordering. A Pod (as in a pod of whales or pea pod) is a group of one or more containers, with shared storage and network resources, and a specification for how to run the containers. StatefulSet. DaemonSet StatefulSets Kubernetes StatefulSets introduce order and consistency to stateful applications, such as databases, by assigning unique identities and persistent storage to each pod. The bookies deployed in a DaemonSet stores data on the local disks. However, the order matters in a StatefulSet, and K8s will maintain that order when scaling up or down to ensure stability. templateGeneration is removed(We chose to use a Deployment instead of a DaemonSet, to avoid the DaemonSet being considered idle workload on a node. When Pods are being deleted, they are terminated in reverse order, from {N-1. Migrate to the apps/v1 API. 4. Unlike a Deployment, which is designed for stateless applications, a StatefulSet provides guarantees about the ordering and uniqueness of pods, and maintains persistent storage for each pod. To create a StatefulSet resource, use the kubectl apply command. DaemonSets are a type of resource in Kubernetes that make sure that a specific pod. Kubectl is the command line configuration tool for Kubernetes that communicates with a Kubernetes API server. After learning that we should have used a StatefulSet instead of a Deployment in order to be able to attach the same persistent volume to multiple pods and especially pods on different nodes, I tried changing our config accordingly. Un DaemonSet garantiza que todos (o algunos) de los nodos ejecuten una copia de un Pod. Stateful applications require pods with unique identities. 1. If you find that any Pods listed are in Unknown or Terminating state for an extended period of time, refer to the Deleting StatefulSet Pods task for instructions on how to deal with them. Check the pods and daemonset status; Test; Check the pods event. StatefulSetUnderstanding ReplicaSet vs. Description. 10 and configured the default namespace to enable 1. DaemonSet is, and what they can or cannot do. Un StatefulSet es el objeto de la API workload que se usa para gestionar aplicaciones con estado. Guy Barrette teaches this Docker Containers and Kubernetes Fundamentals course for beginners. DaemonSet vs. StatefulSet と PVC の関係まとめ. StatefulSetは状態を保持する (ステートフルな)アプリケーションを管理するためのKubernetesオブジェクトだ。. The curriculum of the CKA is very specific about the types of workload you need to be familiar with. As nodes are removed from the cluster, those pods are garbage collected. Watch the presentation below given by Ali Kahoot, DevOps Engineer & Trainer at Tarabut Gateway. Intermediate; DaemonSet; Edit this Page. When a StatefulSet controller creates a Pod for the StatefulSet, the control plane sets this label on that Pod. DaemonSets. spec. Metric name Metric type Description Labels/tags Status : kube_statefulset_annotations : Gauge : Kubernetes annotations converted to Prometheus labels controlled via --metric-annotations-allowlist Key takeaways: What is controller concept in Kuberenetes. ) One thing of note, we use pod anti-affinity to ensure the pods would evenly distribute across the nodes. A DaemonSet is an active Kubernetes object managed by a controller. NOTE: DaemonSet vs StatefulSet. You can specify how long a pod can remain bound to a node before being evicted by specifying the tolerationSeconds parameter in the pod specification. 1. kube_daemonset_status_number_unavailable # 应该运行守护程序容器且没有任何守护程序容器正在运行并且可用的节点数 kube_daemonset_updated_number_scheduled # 正在运行更新的守护程序pod的节点总数 kube_daemonset_metadata_generation # 代表所需状态的特定生成的序列号。. field to . Note: If --to-revision flag is not specified, kubectl picks the most. Chúng ta phải chú. Whereas a QoS-based eviction. DaemonSets are useful for deploying ongoing background tasks that you need to run on all or certain nodes, and. So the daemonset is ok to the certain extent, but is still lacking, especially in edge situations. All of these pods are based on the same spec, but are not interchangeable: each has a persistent ID that persists whenever the deployment changes. Once tied, the referrers' names will change alongside the target name via transformers like namePrefix and nameSuffix Usage ; The syntax nameReference should be written in the. The StatefulSet controller scaled the number of replicas. The ReplicaSet is also responsible for creating and managing pods based on a template specification. org YouTube channel that will provide you with a hand-on introduction to Docker and Kubernetes. StatefulSet is the workload API object used to manage stateful applications. DaemonSet vs. To run a Kubernetes platform effectively, cluster administrators need visibility into the behavior of the system. Kubernetes DaemonSet is a type of controller that ensures that a single instance of a pod runs on every node in your cluster or on a subset of nodes that you specify. name of the Job is part of the basis for naming those Pods. 5 or before. 2. Scaling Down. A DaemonSet is a unique kind of resource that K8s assigns to a pod for each Kubernetes node in the cluster. Another advantage of using a Daemonset is that, if you add a node to the cluster, then the Daemonset will automatically spawn a pod on that node, which a deployment will not do. 2 Pod 배포 Controller: Deployment, DaemonSet, Job, CronJob, StatefulSet w8s에서 Pod를. However, StatefulSet objects include a volumeClaimTemplates array, which automatically generates the PersistentVolumeClaim objects. Unlike a Deployment, a StatefulSet. Note. The Vault Helm Chart uses the StatefulSet deployment model. StatefulSets are useful for managing stateful applications that require stable network identities and persistent. Pod referencing DOBS volumes must be owned by. DaemonSet. StatefulSet vs. g Hadoop cluster, MySQL cluster, where each node has its own storage. To improve fault tolerance, instead, they should always be part of a Deployment, DaemonSet, ReplicaSet or StatefulSet. Statefulsets. 每种采集方式都有其对应的 优缺点 ，这里简单总结如下：. Deploying a MongoDB Database: Here is an example of how to deploy a MongoDB database using a StatefulSet in Kubernetes. All of these pods are based on the same spec, but are not interchangeable: each has a persistent ID that persists whenever the deployment changes. What is the difference between them. Search Deployment Vs Statefulset In Kubernetes Statefulset In Kubernetes Explained Stateless Statefulsell goods, solutions, and more in your neighborhood. As with all other Kubernetes config, a Job needs apiVersion, kind, and metadata fields. 10. StatefulSet vs. This method will "patch" the existing Deployment/StatefulSet/Daemonset and add the sidecar. The importance and meaning of each of these files and folders inside a Helm chart are:. roles=master seed nodes and a daemonset of data (all roles) nodes. You may notice two things here: (1) there is only one pod created while we asked for three, and (2) the pod name contains the StatefulSet name. The common format of a kubectl command is: kubectl action resource This performs the specified action (like create, describe or delete) on the specified resource (like node or deployment). Container state is not saved so all of the files that were created or modified during the lifetime of the container are lost. Learn more about debugging an init-container.