The differences in this manifest are: # kubectl create -f replicaset. The deployment process for Deployments is driven by a controller loop, in contrast to DeploymentConfigs which use deployer pods for every new rollout. To create a ClusterIP service (default), use the following command: $ kubectl expose deployment nginx-deployment –name my-nginx-service –port 8080 –target-port=80. As such, it is often used to guarantee the availability of a specified. The ReplicaSet config file has two important features: Pod Template: A template for new Kubernetes pods. Two important columns of this output are: DESIRED displays the desired number of replicas of the application, which you define when you. Cet objet est souvent utilisé pour garantir la disponibilité d'un certain nombre identique de Pods. # Create the MySQL StatefulSet using deployment we can undo deployment, pause deployment, resume deployment. Additional replica sets in different Azure regions provide geographical disaster recovery for. Can also be specified via K8S_AUTH_HOST environment variable. revisionHistoryLimit is an optional field that specifies the number of old ReplicaSets to retain to allow rollback. For example, the following commands connect to a deployment running on localhost port 28015: mongosh "mongodb://localhost:28015". Provide a URL for accessing the API. The old ReplicaSet is scaled down as the new one is scaled up, ensuring that the. So the only way to do this is to scale down the number of replicas. Avoid complexity when possible, but let your application requirements dictate the architecture. To deploy a replica set using an object, you must: Have or create an Ops Manager instance or a Cloud Manager organization. The user can specify a different scheduler for the Pods of the DaemonSet, by setting the . Replication Controllers and PODS are associated with labels. A Deployment is a higher-level resource that provides a declarative way to manage and update pods. When to use a ReplicaSet. Deployment works one level above ReplicaSet object. (Remember, a controller in Kubernetes is what takes care of tasks to make sure the desired state of the cluster matches the observed state. t. StatefulSets. yaml in which a deployment, whose strategy is RollingUpdate, is defined. In this case, you select a label that is defined in the Pod template (app: nginx). Instead we use Deployment to manage a ReplicaSet. Bare pod. You can scale down to 3 by running the command below. Can also be specified via K8S_AUTH_HOST environment variable. but the problem is i need to clean all old deployment and replica set once new version deployed successfully. This is where PDB s provide the added advantage over the Replicaset. selector field defines how the created ReplicaSet finds which Pods to manage. 7. They let you perform rolling updates of ReplicaSets, where Pods are rescheduled. The Deployment will create a replica set before creating the Pod. Enter the replica set name and click the Convert button. Kubernetes Deployment is usually used for stateless applications. consider the deployment is being updated to a later version of nginx image, as part of the upgrade it creates a new replicaset in the background which uses same selector but with new pod-template-hash, meaning the selector for the new. @HunzlaSheikh When you run kubectl delete -f render. yaml replicaset "soaktestrs" created Check the Status of a ReplicaSet Once the ReplicaSet is created, we can use the describe command to check the status of the pods and get more detail. Under the hood, Deployment creates a ReplicaSet which in turn creates pods on our cluster. The number of pods that have labels matching the labels of the pod template of the replicaset. A ReplicaSet, as the name implies, is a set of replicas (Pods) maintained with their Revision history. However, Deployment is a higher-level concept that manages ReplicaSets and provides declarative updates to Pods along with a lot of other useful features. selector section so that new replicaset and deployment can be run while old one still taking traffic. If you want to look at all the logs for a specific deployment, use the command: kubectl logs. r. affinity. When any new update to the deployment is made the pods running are updated in rolling-update fashion meaning at first the K8s makes sure the new pods are able to. The major difference between a ReplicaSet and a Replication Controller right now is the. Offical Link. metadata: annotations: deployment. Kuberneters – Difference Between Replicaset and Replication Controller. Deployment is an abstraction over ReplicaSet. string. kubectl scale command is used to change the number of running replicas inside Kubernetes deployment, , replication controller, and stateful set objects. While ReplicaSets can be used independently, today it’s mainly used by Deployments as a mechanism to orchestrate. Avoid complexity when possible, but let your application requirements dictate the architecture. How to create a Deployment. trafficSplitMethod - Traffic split method string. tier=backend. Repare que ao aplicar o deployment ele ja cria automaticamente o ReplicaSet e por consequência o pod, como não especifiquei o número de réplicas ele criou apenas um pod. The desired replica of the old. With ReplicaSet you define number of replicas you want to run. When you update a Deployment, it will update the ReplicaSet, which in turn updates the Pods. The Deployment creates a ReplicaSet that creates three replicated Pods, indicated by the . The ReplicaSet controller ensures that a specific number of Pods are running. Patch your deployment either by running and edit the environment field there: kubectl edit. じゃあ、ReplicaSetで十分だから「Deployments」は使うことないのかというと、これは新しいバージョンのアプリをデプロイする時に役に立つ。. Deployment status, notice only 2 ready replicas:A new deployment has been created and the release was successfully deployed on our AKS cluster. Create a deployment configuration. By evaluating pod. Add an arbiter to give a replica set an odd number of voting members to prevent election ties. Pod :1つ以上のコンテナからなる集合体(Kubernetes上でコンテナを管理する最小単位). これまで、Pod、ReplicaSetの動作を確認してきましたので、今回はDeploymentの動作を確認します。 Deploymentは、ReplicaSet、Podの上位概念で、以下のような関係になります。 Deploymentの作成 yamlファイルの作成とapply. Creating Your First Deployment. The . Create a deployment. Know everything about the CKA Certification. Does any one have implemented blue green deployment while cleaning the old stuff?The solution(s) : Use a StatefulSet, ReplicaSet or DaemonSet to ensure the Pod creation after a Node failure. For a particular service. Replication Controllers perform the same function as ReplicaSets, but Replication Controllers are old school. The Deployment is scaling down an existing ReplicaSet. Imperative way: (this will then diverge from what you have in your yaml-file) kubectl scale deployment mage-di --replicas=2. Tuy nhiên, Deployment Controller, 1 khái niệm ở mức cao hơn sẽ quản lý các ReplicaSet và cung cấp các cập nhật cho pod kèm theo các tính năng hữu ích khác. I tried to update the Deployment and only the new ReplicaSet is updated. spec. 15340e5036ef7d1c ReplicaSet Normal SuccessfulDelete replicaset-controller Deleted pod: wordpress-686ccd47b4-4pbfk default 22m 22m 1 wordpress-686ccd47b4. It manages the deployment and scaling of a set of Pods, and provides guarantee about the ordering and uniqueness of these Pods. host. ) A ReplicaSet ensures that a specified number of Pod replicas are running continuously and helps with load-balancing in case of an increase in resource usage. ¶ The Advanced Configuration Options section allows you to set MongoDB runtime options for each MongoDB process in your deployment. They let you perform rolling updates of ReplicaSets, where Pods are rescheduled without any service downtime. Deployment はPodとReplicaSetの宣言的なアップデート機能を提供します。 Deploymentにおいて 理想的な状態 を記述すると、Deploymentコントローラーは指定された頻度で現在の状態を理想的な状態に変更します。Deploymentを定義することによって、新しいReplicaSetを作成したり、既存のDeploymentを削除して. one may never need to manipulate ReplicaSet objects when using a Deployment)Alternatives to ReplicaSet Deployment (recommended) Deployment is an object which can own ReplicaSets and update them and their Pods via declarative, server-side rolling updates. Deployment is the easiest and most used resource for deploying your application. If you check ReplicaSet after deploying a Deployment you will notice a ReplicaSet of the same name at the Deployment. Usually, you define a Deployment and let that Deployment manage ReplicaSets automatically. Before you begin You need to have a Kubernetes cluster, and the kubectl command-line tool must be configured to. 15340e5036f2fec1. apiVersion:. The deployment sets up a ReplicaSet with three pod replicas, specified in the replicasfield under spec. It ensures that the desired number of replicas (PODs with the application running), as mentioned while creating the Replicaset, is always maintained. Their sole purpose is to run container. Or by using YAML: apiVersion: v1. If you see the logs, they are starting from 73, meaning that the previous pod had written till 72 in the file and. Actually, you will notice that the only change between declaring a Deployment and a ReplicaSet is the kind Note: A Deployment that configures a ReplicaSet is now the recommended way to set up replication. selector field defines how the created ReplicaSet finds which Pods to manage. ReplicaSetCondition describes the state of a replica set at a certain point. 3. A ReplicaSet’s purpose is to run a specified number of pods at any given time. A standalone mongod instance is useful for testing and development. The interesting thing here is that when there is pod that actually matches the selector labels of the RS without. OwnerReferences[0]. Canary Deployments. That’s the job of the ReplicaSet object. The smallest unit of deployment, a Pod, runs containers. Comment un ReplicaSet fonctionne Un ReplicaSet est défini avec des champs, incluant un selecteur qui spécifie comment. A ReplicationController ensures that a specified number of pod replicas are running at any one time. apps/kuard created $ kubectl get deployment,replicaset,pod --show-labels NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE LABELS deployment. How to create a Deployment. Each of these objects is abstractions with different responsibilities;. A DeploymentConfig (DC) in OpenShift is more or less equivalent to a Kubernetes Deployment, nowadays. In this article. StatefulSets. このリソースは直接使用することは少ないが、次に出てくるDeploymentを抑える上で理解が進むのでやっていこう。. replicas of the Deployment and / or StatefulSet be removed from their manifest (s). However, more sophisticated selection rules are possible, as. What is a ReplicaSet?. Replica sets provide redundancy and high availability and are the basis for all production deployments. The Deployment creates a ReplicaSet that creates three replicated Pods, indicated by the . However, a Deployment is a higher-level concept that manages ReplicaSets and provides declarative updates to pods along with a lot of other useful features. Creating and Checking the Status of a ReplicaSet. Manages the deployment and scaling of a set of Pods, and provides guarantees about the ordering and uniqueness of these Pods. there is a deployment tool like ArgoCD / FluxCD / other tool that recreates them. However, more sophisticated selection rules are possible, as. While ReplicaSets can be used independently, today they're mainly used by Deployments as a mechanism. yaml, this will instruct Kubernetes to scale the current number of Pods to the value of. Convert a Standalone mongod to a Replica Set. ReplicaSet is the next-generation ReplicationController that. A deployment is a higher-level object that provides advanced features such as rolling updates, rollbacks, and self-healing capabilities, while a replicaset is a lower-level object that is. A deployment creates a ReplicaSet that has the purpose of maintaining a "set" of "replicas" of said deployment. This annotation is set by Kubernetes. As such, a deployment is generally the best option for any service that needs to maintain high availability, as it intelligently tears down services in the event of a change to the desired state of the system so that it doesn’t interrupt any service. This manifest defines a Deployment for the nginx application. Deploymentはローリングアップデートやロールバックといったデプロイ管理の仕組みを提供するものです。 Deployment の仕組み. For now I'm able to increase the replicas from CLI using the command: kubectl scale --replicas=3 deployment my-deployment. If you see the logs, they are starting from 73, meaning that the previous pod had written till 72 in the file and. It also provides control when we have to. spec. added in kubernetes. This is needed for rolling upgrade, rollback functionsWhen you make any change in deployment, you’ll see there’s a new replicaset created. then apply it to the cluster with: kubectl apply -f k8-deployment. Deploy a MongoDBMultiCluster Resource. When an HPA is enabled, it is recommended that the value of spec. Note: In Kubernetes, Deployments don’t manage Pods directly. Deleting ReplicaSet. yaml After some time, we modify d. Lorsque vous avez mis à jour le déploiement, il a créé un nouveau ReplicaSet (nginx-deployment-1564180365) et l'a mis à l'échelle jusqu'à 1, puis a réduit l'ancien ReplicaSet à 2, de sorte qu'au moins 2 pods étaient disponibles et au plus 4 pods ont été créés à chaque fois. After you destroy the ReplicaSet, the running Pods will also get deleted. Replicaset will only ensure that the replicas number of pods will be created on other nodes during the process. 4. Now this ReplicaSet and its Pods are managed by the Deployment. A Pod is connected to a Daemon-/Replicaset or a Deployment by matching on its selectors. As mentioned in the previous section, there are two ways to define or configure a ReplicaSet; directly through a YAML configuration file or through a deployment. The Deployment and DeploymentConfig API objects in OpenShift Container Platform provide two similar but different methods for fine-grained management over common user applications. restart で、ロールアウトを再実行します。. spec. By using a Deployment to manage a ReplicaSet, you can easily rollback to an earlier Deployment revision. g. In the case of a Job, update parallelism only if the current parallelism value matches. updating the image:, it will manage the creation of a new ReplicaSet for you. – moonkotteA Deployment is used to spin and scale stateless applications while saving the state of the ReplicaSet it manages in a persistent volume, so that all pod replicas share the same volume. When you create a Deployment in Kubernetes, a ReplicaSet is created automatically. $ kubectl apply -f deployment. Pod と ReplicaSet の関係は疎結合になっている。. Use this procedure to deploy a new replica set managed by Cloud. Behind the scenes, Kubernetes stored numbers of old ReplicaSet so that you can switch to any Replicaset anytime. It can. Stateless applications are those that do not. Previously, we have learned how to roll back to an old version in case of an issue with a current deployment. The Deployment is scaling up an existing ReplicaSet. An example output is as follows. Deployment provides you the capabilities to upgrade your applications smoothly using rolling updates, undo changes, pause, and resume changes as required. spec. A pod is the smallest unit of deployment in Kubernetes, consisting of one or more containers that share resources and networks. The replica set name is immutable once deployed. For the value smi, the percentage traffic split is done at the request level by using a service mesh. Since the required number of pods is maintained and monitored, they're running and available after the deployment is created. replicas field. Kubernetes marks a Deployment as progressing when one of the following tasks is performed: The Deployment creates a new ReplicaSet. kubectl apply -f dp. This last is. r. Alternatives to ReplicaSet Deployment (recommended) Deployment is an object which can own ReplicaSets and update them and their Pods via declarative, server-side rolling updates. A ReplicaSet ensures that a specified number of pod replicas are running at any given time. In the case of a Job, this option is ignored. Hay nuevos Pods disponibles y listos (listo por lo menos MinReadySeconds). From the above, it should be clear that there is a Deployment with a single ReplicaSet that contains a single Pod running the busybox image. m. This Replicaset is responsible for creating Pod's. Reading the documents it is not clear if the default behaviour should. In summary, Controller reads the Deployment spec, forwards the pod configuration to ReplicaSet and then it creates the pods with. spec. ; Cloud Manager. A ReplicaSet ensures that a specified number of pod replicas are running at any given time. The old one remains the same. The ReplicaSet is responsible for making sure that the number of replicas specified are always running. Replica sets can be added to any peered virtual network in any Azure region that supports Domain Services. By default, Kubernetes keep 10 replica sets for each deployment, which means you can go back 9 versions prior. I am creating a deployment using this yaml file. Using electromagnetic waves to flummox and follow smarter weapons has become a critical part of the cat-and-mouse game between Ukraine and Russia. ownerReferences" field with the ID of that ReplicaSet. It scales up 7 because 25% of 25 (your maxSurge value) is 6. (No need for. I am not going to explain this approach in details because the link I provided is quite. While ReplicaSets can be used independently, today they're mainly used by Deployments as a mechanism to orchestrate Pod creation, deletion and updates. Walaupun ReplicaSet dapat digunakan secara independen, seringkali ReplicaSet digunakan oleh Deployments sebagai mekanisme untuk mengorkestrasi pembuatan, penghapusan dan pembaruan Pod. The difference is in the arguments passed to the command. Whenever, you made some changes in deployment's podTemplate, it creates a new replicaset. To estimate cost for. But while deployment is under control of an HPA, if you apply deployment config with set amount of replicas, it would override current desired amount of replicas and might scale your deployment. The Deployment creates a ReplicaSet that creates three replicated Pods, indicated by the . A replica set contains several data bearing nodes and optionally one arbiter node. Important. ownerReferences pointing to your Deployment (owner) and by design they should be removed first from Kubernetes 1. You switched. Aug 25, 2023 10 min read Statefulset Deployment Kubernetes. offer several benefits for managing application deployments:Good explanation what is event in Kubernetes you can find in Types of Kubernetes Events article. StatefulSet (stable-GA in k8s v1. Its yaml file is very much similar to replicaset's yaml file. You could see the number of ReplicaSets. A Deployment is the preferred way to deploy an application inside a pod. It is declarative and can be used for rolling updates of micro. 15, 2023, 3:18 p. Update the deployment. Create a DaemonSet. You'll start by creating a ReplicaSet manifest in YAML format. . Changes to label selectors make existing pods fall out of ReplicaSet's scope, so if you change labels and label selector the pods are no longer "controlled" by ReplicaSet. MatchInterPodAffinity (1). Viewed 449 times. Only the following resource creation is possible using kubectl create:. The ReplicaSet creates Pods in the background. It creates a selector that matches to matchLabels. The controller verifies if the current state matches the deployment’s desired set, and creates a ReplicaSet if necessary, which then creates the pods. 📍 Deployment vs ReplicaSet vs Pod: In Kubernetes, different objects serve various purposes when managing pods. Entonces, continuó escalando el nuevo y el viejo ReplicaSet con la misma. Step 4: Viewing live updates from the cluster. If this is your first database deployment, click Build a Database, then click Advanced Configuration Options. yaml and re-apply it to update the deployment. Overview. The deployment process for Deployments is driven by a controller loop, in contrast to DeploymentConfigs which use deployer pods for every new rollout. io/revision annotation. ReplicaSet is the next-generation ReplicationController that supports the new set-based label selector. Understanding Deployment s. yml. The kubectl set env command updates the environment variables for a Kubernetes resource, such as a Deployment, ReplicaSet, or StatefulSet. spec. Officially, there is no limit to how high this can be set but, of course, you have to keep in mind the underlying resources of your Kubernetes cluster. of pods are matching the specified no. This document provides strategies for replica set deployments and describes common architectures. You can create a ReplicaSet without creating a Deployment, but nowadays it does not make much sense. Like deployment replicaset cant rollout or rollback to different version of application nor maintain any revisions for the same. Kamu dapat mengawasi perkembangan Deployment dengan kubectl rollout status. A ReplicaSet's purpose is to maintain a stable set of replica Pods running at any given time. In other words, a ReplicationController makes sure that a pod or a. »A replica set is a group of MongoDB deployments that maintain the same data set. As per the name, ReplicaSet is used for managing the replicas of our pods. delete a Deployment to delete this replicaset. You can create a replica set configuration object in mongosh environment, as in the following example: rsconf = {. 2. host. Reload to refresh your session. 25, so it rounds up to 7. Alternatives to ReplicaSet Deployment (recommended) Deployment is an object which can own ReplicaSets and update them and their Pods via declarative, server-side rolling updates. apiVersion: extensions/v1beta1 kind: Deployment metadata: name: nginx. vi d. As per the name, ReplicaSet is used for managing the replicas of our pods. Deployment – A Deployment is the most common way to get your app on Kubernetes. Use the kubectl apply command to create the ReplicaSet by applying the manifest:DaemonSet is a controller similar to ReplicaSet that ensures that the pod runs on all the nodes of the cluster. See SRV Connection Format to learn the SRV. We will create an example ReplicaSet using the below configuration, just like we created a Pod in part 3 of this series. Vì vậy, ta nên sử dụng Deployment Container thay vì sử dụng trực tiếp ReplicaSet trừ khi ta có nhu cầu đặc biệt cần phối hợp. Add a comment. ReplicaSet then fulfills its purpose by creating and deleting Pods as needed to reach the desired number. A ReplicaSet is a Kubernetes object that ensures that a specified number of replicas of a pod are running at any given time. Create or generate a Kubernetes Operator ConfigMap. Let's take a brief look at the various options used with the command: webapp: The name of the Deployment--image=nginx: Specifies the name of the container image--replicas=2: Specifies the number of replicas (Pods) to run--dry-run=client: Used to preview the object instead of creating it--output=yaml: Specifies that the output format is. A replica set is a core Kubernetes object called ReplicaSet. To verify the number of Pods, run the $ kubectl get pods command. Imperative config management with commands. Replica sets provide redundancy and high availability and are the basis for all production. In docs about owners and dependents it says:. 1. El Deployment está escalando su ReplicaSet más nuevo. You can define a deployment to create a ReplicaSet or to remove deployments and adopt all their resources with new deployments. I am not able to find a better description than kubectl describe deploy. You’ll create a new Kubernetes secret for the new user, edit the custom resource of ReplicaSet deployment, and update the ReplicaSet to your. Like a ReplicaSet’s purpose is to maintain a stable set of replica Pods running at any given time. When your Pod's part of a ReplicaSet or Deployment, you can initiate a replacement by simply deleting it. selector. This document provides strategies for replica set deployments and describes common architectures. For Deployment, ReplicaSet, Replication Controller, only scale, if the number of existing replicas matches. Aunque que los ReplicaSets puede usarse independientemente, hoy en día se usan principalmente a través de los Deployments como el mecanismo. ClusterControl supports MongoDB/Percona Server for MongoDB 3. ReplicaSet. Then gradually it decreases the count of replicas from the previous ReplicaSet and increases the count on the current one until the latter ReplicaSet has all the Pods. string. Click the Save button. At the same time, Kubernetes Concepts page says about ReplicaSet object. Kubernetes events are a resource type in Kubernetes that are automatically created when other resources have state changes, errors, or other messages that should be broadcast to the system. Agora, vamos mudar a. This will likely be a ReplicaSet (which is generated by the Deployment). kubectl scale deployment <deployment-name> --replicas=3 My. Even though the new replica set is created. This is how rolling updates work - the Deployment creates a new ReplicaSet then gradually scales up the new one and scales down the old to the new until they are all on the new version. This doesn't work as the ReplicaSet is not inactive. 1. kubectl delete <component type> <name> <-n namespace>. Implementation mechanism of garbage collection. The ReplicaSet configuration defines a number of identical pods required, and if a pod is evicted or fails, creates more pods to compensate for the loss. Frequently, when deploying a specific pod-template, the deployment fails to create a successful replicaset and no instance is created. While ReplicaSets can be used independently, today they're mainly used by Deployments as a mechanism to orchestrate Pod creation, deletion and updates. spec. Despite both controllers being instrumental in managing high-availability. ReplicaSet's purpose is to maintain a stable set of replica Pods running at any given time and it checks how many pods need to maintain bases on which it creates. As we know, Kubernetes has the features of Self Healing, High. Key concepts. This naming is consistent, so you can make sure you always have. When a new version of an application is deployed, the Deployment creates a new ReplicaSet with. Deployment sẽ sở hữu và quản lý các ReplicaSet của chúng. A ReplicaSet (RS) is a Kubernetes object that ensures there is always a stable set of running pods for a specific workload. Concepts: Pod: A Pod is a group of one. Number of seconds to sleep between checks. See moreDeployment resources enable declarative updates of Pods and ReplicaSets. It creates a selector that matches to matchLabels. You’ve completed the deployment of the MongoDB operator and ReplicaSets to your Kubernetes cluster at this point. As an alternative to using this procedure, you can use. A deployment creates replicaset and replicaset in turn creates pod. Hostname and port of a mongod process. Deployments have two main disadvantages compared with StatefulSets and DaemonSets. It helps to scale up and scale down for our application. This way you could either, name the stateful-set according to the classes, i. A Deployment ensures that a specified number of pod “replicas” are running at any one time. A replica set is a group of MongoDB deployments that maintain the same data set. A ReplicaSet is a Kubernetes object that ensures that a specified number of replicas of a pod are running at any given time. The simplest method that comes to mind when we need to run a Singleton Pod in Kubernetes is a ReplicaSet. Summary. The situation is analogous to having a manager order "We need three workers doing this task at all times. Get the replicaset list for the Deployment we just created. Clean up Policy. StatefulSet で作成された Pod は、それぞれ単一の PV をマウントしています. spec. 🕸️Simple Difference Between ReplicaSet and Deployment. 1. Deleting the Pod will kick in the current deployment configuration to be applied by Kubernetes to restart and redeploy the Pod. Alternatives to ReplicaSet Deployment (recommended) Deployment is an object which can own ReplicaSets and update them and their Pods via declarative, server-side rolling updates. Now we’ll create a Kubernetes service using our deployment from the previous section. The stable/mongodb-replicaset chart provides different options when it comes to using Secrets, and we will create two to use with our chart deployment: A Secret for our replica set keyfile that will function as a shared password between replica set members, allowing them to authenticate other members. With deployment you should be able to do rolling upgrade or rollback. A replica set is a group of MongoDB deployments that maintain the same data set. yml shown below. Whenever we create a new deployment, K8s triggers a Rollout. And in this week, Day 7 and Day 8 we covered Kubernetes Services, Deployment, HPA, Cluster Resource Limit, Daemonset Controller and Dashboard. DeploymentとReplicaSetとPod. Deployments manage a ReplicaSet, e. The number of replicas in this ReplicaSet is specified in the Deployment YAML file. Always use a replica set in production. The Deployment creates a ReplicaSet that creates three replicated Pods, indicated by the . If you want to delete only the ReplicaSet resource, and keep the pods without an owner, you need to manually delete them. More information Before you.