Improve this answer. kubectl. For instance, executing kubectl autoscale rs foo --min=2 --max=5 --cpu-percent=80 will create an autoscaler for ReplicaSet foo, with target CPU utilization set to 80% and the number of replicas between 2 and 5. yaml --record=true. (Remember, a controller in Kubernetes is what takes care of tasks to make sure the desired state of the cluster matches the observed state. Run kubectl get rs (ReplicaSet) to see ReplicaSets created by the deployment. You can get the stats on deployments using kubectl get deployments, kubectl describe deployments, and. kubectl replace –f nginx_replicaset. Log in to CEE CLI and confirm that no active alerts and system status must be at 100%. Get a idea from yaml file. yaml deployment "mywebservice-deployment" create $ kubectl get deployments NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE. Post a CommentYou can exit the pod using Ctrl+D, or by running exit in the console. 188ssys. Now, we can check the deployed replica set by using the below command. yml kubectl get replicaset kubectl get pods. A ReplicationController is similar to a process supervisor, but instead of supervising individual processes on a single node, the ReplicationController supervises multiple pods across multiple nodes. $ kubectl get rsNAME DESIRED CURRENT READY AGEmy-first-replicaset 3 3 3 2m// get in the editor, modify the replica number, then save and leave$ kubectl edit rs my-first-replicaset# Please. 2. kubectl set image deployment/application app. Dans Kubernetes 1. So, chances are you want to be listing the deployments instead of the services in this case. Wait until the Pods have been terminated, using kubectl get pods to check their status, then rescale the Deployment back to your intended replica count. If we execute the commands: kubectl get sts and kubectl get pods -l app=mysql , we see the cluster deployed. 99, which will hopefully weed out any unserious sellers and allow us to focus on those who truly want to sell to. In a few minutes, you will see that there are 5 MongoDB pods. scale down kubernetes deployments to 0 and scale back to original number of replica sets. Install Docker. kubectl get pods NAME READY. Yes identical Pods. To create a replica said execute the following command. kubectl is a command-line tool for interacting with a Kubernetes cluster. A ReplicaSet's purpose is to maintain a stable set of replica Pods running at any given time. kubectl get pods. Note: These instructions are for Kubernetes v1. yml kubectl get replicaset kubectl get pods. Comme avec tous les autres objets API Kubernetes, un ReplicaSet a besoin des champs apiVersion, kind et metadata . Improve this answer. Learn more about Teamskubectl get pods -l 'env in (development, testing)' kubectl get pods -l 'env notin (development, testing). $ kubectl create -f replica. 492suser 0m0. Run the command kubectl get pods and count the number of pods. You can verify the status of your pod by running the get pods command. The. Scales down all deployments in a whole namespace: kubectl get deploy -n <namespace> -o name | xargs -I % kubectl scale % --replicas=0 -n <namespace>. To do that, issue the command: kubectl apply -f rs. This will delete your deployment, associated replicasets and pods of this. // demonstrate to change the number of Pod replicas. Here are some examples of field selector queries: metadata. yaml # or another way of writing "kubectl scale --replica=10 replicaset <replicaset name as provided in metadata>" kubectl scale --replica=10 replicaset myapp-rs. 0. kubectl get pods -n <namespace of data controller> Delete the managed instance pod. 2) using this chart: bitnami/mongodb 13. After executing the kubectl scale command to set the replicas to zero, running kubectl get pods will show that there are no Pods running in the default namespace since all the Pods were terminated. exe get events (Looking into the events): Among other things I can see "Scaled down replica set redis-5678477b7c to 0" and then "Scaled up replica set redis-5678477b7c to 1" which looks like it was never actually deleted but immediately scaled up again after the delete command was executed. If no pods are returned, you can deploy the latest version of the Metrics Server by running the following command. A ReplicaSet is defined with fields, including a selector that specifies how to identify Pods it can acquire, a number of replicas indicating how many Pods it should be maintaining, and a pod template specifying the data of new Pods it should create to meet the number of replicas criteria. Step 4. A ReplicaSet's purpose is to maintain a stable set of replica Pods running at any given time. Delete each broken pod. In Kubernetes 1. Check to see whether the kube-controller-manager is running or crashing or logging errors. Edit the controllers configuration by using kubectl edit rs ReplicaSet_name and change the replicas count up or down as you desire. This field's replicas value is set to 3 ,indicating that the desired state is to have three identical pods managed by this resource. Install and Set Up kubectl on macOS; Install and Set Up kubectl on Windows; Administer a Cluster. yaml and repeate for deployment. Existing Replica Set controlling Pods whose labels match . Prerequisites. with the -A option it gives you all your hpa from all namespaces if you want to specify a namespace, you can use -n option. yml. To expose the external deployment as a NodePort service, you can specify the type as NodePort in kubectl expose: shell. First find the pvs: kubectl get pv -n {namespace} Then delete the pv in order set status to Terminating. This procedure allows you to set different settings for the replica set resource, such as overrides for statefulSet configuration. You can use: kubectl get hpa -A -w. Here, I’m scaling down the ReplicaSet used in the article’s example to manage two pods instead of four. apps/nginx 1/1 1 1 6m54s. List the available daemon sets: [root@controller ~]# kubectl get ds NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR. ReplicaSet is the next-generation Replication Controller. Each get command can focus in on a given namespace with the –namespace. The following kubectl command sets the spec with progressDeadlineSeconds to make the controller report lack of progress of a rollout for a Deployment after 10 minutes: kubectl patch deployment/nginx-deployment -p ' {"spec": {"progressDeadlineSeconds":600}}'. Improve this answer. If you created HPA you can check current status using command. First of all, When a pod crashes, k8s doesn't necessarily change the name of the pod, Because as you said, it's restarted, not recreated. Other Posts. After you destroy the ReplicaSet, the running Pods will also get deleted. Like a Deployment, a StatefulSet manages Pods that are based on an identical container spec. Usually, you define a Deployment and let that Deployment manage ReplicaSets automatically. Deployment creates ReplicaSet with the number of replicas=3. Create a YAML file called replica-set-service. 3. 今回はkubectl scale コマンドを使ってreplicasetのレプリカ数を6個に増やしてみる. kubectl get pods NAME READY STATUS RESTARTS AGE web-0 1/1 Running 0 1m web-1 1/1 Running 0 46s web-2 1/1 Running 0 18s. $ kubectl apply -f replicaset. $ kubectl set image deployment/newsconsumer-deployment. How Deployments Work. The MongoDB shell welcome message appears. 96. Confirm to see if it created the desired number of pods you specified using kubectl get pod As you can see, it has scaled it to four pods. Delete a specified ReplicaSet TL;DR: You need to scale your deployment instead of the replica set directly. ssh -p 2024 admin@`kubectl get svc -A| grep " ops-center-cee" | awk '{print $4}'` show alerts active. kubectl get sts --all-namespaces to delete all the stateful sets in. A ReplicaSet can also be a. We will explain: What RS is. Teams. To get the list of available Kubernetes StatefulSets use: bash. Behind the scenes, kubectl. yaml. Create; get; describe; delete; Type – Here you have to mention the specific resource provided by Kubernetes that you want to create like pods,. But when I edit this deployment using the command kubectl edit deployment my-dep2, only changing the version of busybox image to 1. In the Kubernetes API documentation it's mention that there is a PUT request to do the same. sharma@knoldus. insert ( {key1: ‘value1’}))”. yaml. 14: kubectl edit pvc <name> for each PVC in the StatefulSet, to increase its capacity. It demonstrates how to create, delete, scale, and update the Pods of StatefulSets. Installed kubectl on the client and saved the kubeconfig file with the user configuration to C:Users<username>. Follow. Each replica will be created in order from 0-N and deleted in reverse order from N-0. Kubernetes provides several built-in workload resources: Deployment and ReplicaSet (replacing the legacy resource ReplicationController). Step 2: Edit the pod labels which no longer match the replicaset selectors. because what you are doing is not deleting the deployment but setting the desired replica count to 0. Example-1: Create replica set using match labels. Scale down the sts kubectl scale --replicas=0 sts <sts name>. If Metrics Server is already running, you’ll see details on the running pods, as in the response below: kube-system metrics-server-v0. Deploying. 96. In case if you are working in a specific kubernetes namespace then I would recommend using the -n flag. We have now logged into the MySQL database. Lowering the replica count will cause. vi d. This makes it possible to set the first pod as primary, for example, and the others as replica pods. Kubectl apply -f <name of the pod> Scaling a ReplicaSet . 2 ReplicaSet的伸缩A Deployment is a Kubernete’s object which is used to create, update and delete a set of Identical Pods. Get Started. apps -n <namespace> (or --all-namespaces) – Noam Manos. Example-2: Create replica set using match expressions. $ kubectl get pod NAME READY STATUS RESTARTS AGE myapp-replicas-67rkp 1/1 Running 0 33s myapp-replicas-6kfd8 1/1 Running 0 33s myapp-replicas-s96sg. So, we will be using the following command: kubectl exec -it mongodb-0 --. 1. Share. Once you deploy the replication controller, first the pods get deployed using the pod template. If we want to check the status of the replica set, then run the below command. Get Kubernetes Cookbook, 2nd Edition now with the O. Use kubectl to scale StatefulSets. The controller is watching the API server for new events, and it detected that there is a new ReplicaSet object. yml. yaml -- OR -- . Conclusion. As with all other Kubernetes API objects, a ReplicaSet needs the apiVersion, kind, and metadata fields. A ReplicaSet is a set of Pod templates that describes a set of Pod replicas. 3. Scaling_and_replica gauravagnihotri$ kubectl get deployment NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE tomcat-deployment 1 1 1 1 3m13s. Restartable Batch Job: Concern: Job needs to complete in case of voluntary disruption. Share. We are using Kubernetes 1. Install and Set Up kubectl on Linux; Install and Set Up kubectl on macOS; Install and Set Up kubectl on Windows; Administer a Cluster. Replica sets provide redundancy and high availability and are the basis for all production deployments. 2 image is utilized. Kickstart Your Career. moury~ % kubectl scale statefulset web --replicas=3 statefulset. extensions/nginx scaled sekreta@cloudshell:~ (composite-rune-239911)$ kubectl get deploy NAME READY UP-TO-DATE AVAILABLE AGE nginx 0/0 0 0 6m48s. The example topology has a single primary server and multiple replicas, using asynchronous row-based replication. apps "web" created. To set up pod replication: 1. extensions. The fields of the table are described below:I want to change the number of replications (pods) for a Deployment using the Kubernetes API (v1beta1). 6. # kubectl delete rs soaktestrs replicaset "soaktestrs" deleted # kubectl get pods Again, the pods that were created are deleted when we delete the Replica Set. kubectl edit rs replicaset. Find the object that "old" rs is controlled by: kubectl describe <rs-name>. Toye Idowu. yml # Verify if new pods got created kubectl get pods -o wide. What is a Mongo Replica Set. Run the same version of kubectl scale, but this time, specify --replicas=2 to scale up the replicas. Now watch it launch:Use kubectl to scale StatefulSets. You could also use the command: kubectl create -f rs. Now run the command $ sudo kubectl. They are handy when it comes to rolling out changes to a set of pods via a ReplicaSet. Instead we use Deployment to manage a ReplicaSet. kubectl get pods --all-namespaces | grep metrics-server. The below command shows how I scale the number of pods from 3 to 4. yaml Check the status of the autoscaler using the kubectl get hpa command. $ kubectl scale deploy nginx --replicas=0 deployment. 1 <none> 443/TCP 9d NAME READY UP-TO-DATE AVAILABLE AGE deployment. Kubernetes client (kubectl) sent a request to the API server requesting the creation of a ReplicaSet defined in the replicaset-app. Also if no labels are specified, the new service will re-use the labels from the resource it exposes. with the -A option it gives you all your hpa from all namespaces if you want to specify a namespace, you can use -n option. name }') This should be more stable because it processes the replica count directly instead of trying to parse the output of kubectl which might. yaml replicaset. $ kubectl edit replicaset new-replica-set . yaml Give it a few moments for the image to get pulled and the container is spawned then run kubectl get pods. kubectl get pods. Information will be in Events: section. Let's check one of the pods just to make sure the new image is used 1 kubectl get pods 2 kubectl get pods -o = custom-columns = NAME:. When you increase the replica count, Kubernetes will start new pods to scale up your service. yaml. kubectl delete rc hello-rc --cascade=false this means the pods are no longer managed . ReplicationController is often abbreviated to "rc" in discussion, and as a shortcut in kubectl commands. As such, it is often used to guarantee the availability of a specified number of identical Pods. that Kubernetes Operator creates, can later be migrated to a different to avoid storing secrets in Kubernetes. Cómo funciona un ReplicaSet Un ReplicaSet se define con campos, incluyendo un selector que indica. Nice! With just a single line we launched a pod with two containers into the Kubernetes cluster. Scaling_and_replica gauravagnihotri$ kubectl get deployment NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE tomcat-deployment 1 1 1 1 3m13s. yml). Use this procedure to create a new replica set in a member Kubernetes cluster in a multi-Kubernetes-cluster deployment. Create replica set. In order to remove the ReplicaSet from the Kubernetes system, you can rely on the subcommand delete. mongodb-replica-set-key}" | base64 --decode Step 3: Restore the MongoDB deployment on the destination cluster You can now restore the persistent volumes and integrate them with a new MongoDB deployment on the destination cluster. Get Pods. kubectl apply -f creates Replica Sets using a config file: kubectl apply -f replicaset-definition-file. 31 (a downgrade but still an update from K8s point of view), the ReplicaSet is not completely replaced. metadata. This command can be used to view logs from a single pod, but you can also use it to view logs from multiple simulataneously. If you run kubectl get pods <pod_name> -o yaml where <pod_name> is a pod created by ReplicaSet, you will see owner reference. cnat. Port Forwarding will make a local port on your machine redirect (forward) traffic to some pod. To create a replica said execute the following command. yml from 3 to 6. $ kubectl get rs NAME DESIRED CURRENT READY AGE nginx-deployment-1564180365 3 3 0 6s nginx-deployment-2035384211 0 0 0 36sTo create the ReplicaSet, you can use the kubectl apply command: kubectl apply -f my-app-replica-set. yaml in /kubernetes_experiments and copy the following code to the. First, check the existing replica set using the following command. A ReplicaSet. Follow answered Jun 10, 2020 at 14:30. Run kubectl get rs to see the deployed replicaset kubectl get rs. $ kubectl get ats NAME CREATED AT ats. You can use autoscaling to adapt the number of pods according to the CPU load of a node. 4. It specifies that there should be three replicas of the Deployment and that each pod should be labeled with app: nginx. vi <my-replica-set>. apps "myapp-replicas" created Next, we make sure it is created. kubectl scale命令通过调整正在运行的容器的数量来立即缩放应用程序。. Improve this answer. (Allows more disruptions at once). Change the number of replicas of your StatefulSet: kubectl scale statefulsets <stateful-set-name> --replicas=<new-replicas>. The easiest way to scale an existing ReplicaSets on a Kubernetes cluster is to use the Kubectl command-line and quickly scale up or down the number of pods. You should see the new ReplicaSet running ( Figure A ). Get the running Pods list. Replication controller is kinda imperative, but replica sets try to be as declarative as possible. Set an alias for kubectl in Bash. 244. Apply the YAML with kubectl. Así, se usa en numerosas ocasiones para garantizar la disponibilidad de un número específico de Pods idénticos. analogy: Head chef instructs the team of line cooks to prepare a certain dish. By manually modifying the replica set that was created for you, you are fighting with the system controller. insert({key1: ‘value1’}))” 3. kubectl get pods frontend-b2zdv -o yaml. –. ' command, I get 2 records each for deployments, replicaset and pods each. If you set your namespace above using the set-context command then the pods will be created in the specified namespace. $ kubectl apply -f busy-job-completion. Is this possible and how to do that? Thank you. Pods in a replica set are controlled by the Replica Set Definition of the replica set, e. If every restart would create a new pod, there would not have been. While ReplicaSets make it easier to work with Pods, they. 9, la version de l'API apps/v1 pour le type ReplicaSet est la version actuelle et activée par défaut. kubectl config set-credentials − Sets a user entry in kubeconfig. kubectl apply -f [manifest file]. 26 introduced a new, alpha-level feature for StatefulSets that controls the ordinal numbering of Pod replicas. DaemonSets run only a single pod replica on each node, whereas ReplicaSets scatter them around the whole cluster randomly. For a single pod you can use the following command: kubectl logs {target} -f. ReplicaSets are not very smart and do not redeploy pods when the container specification has been edited. First, find the StatefulSet you want to scale. test. We run the following command in k8s. – lindluni. In the above screenshot, you can see the details of the ponds created after creating a replica set. # List Pods kubectl get pods # Delete Pod kubectl delete pod <Pod-Name>. statefulset. With IPVS mode, you can change the traffic distribution algorithms to something else. This page shows how to run a replicated stateful application using a StatefulSet. yaml. 1 2022. You can observe how the autoscaler kicks in when load increases, and increments the quote server deployment replica set to a higher value. Note: This is not a production configuration. While we won’t be providing a tutorial for managing Deployments via kubectl, we will be using. kubectl get deployments NAME READY UP-TO-DATE AVAILABLE AGE ngnix-deployment 0/3 3 0 12m kubectl. 0. You can insert a key into the primary instance of the MongoDB Replica Set by running the following: MASTER_POD_NAME must be replaced with the name of the master found in the previous step. 与所有其他 Kubernetes API 对象一样，ReplicaSet 也需要 apiVersion 、 kind 、和 metadata 字段。. It can be considered as a replacement of replication controller. Also you can read in the documentation Horizontal Pod Autoscaler. yaml replicaset. k8s. The selector and matchingLabels is used by the replicaset to monitor other pods as well who have the matching labels. . La version de l'API apps/v1beta2 est obsolète. Delete the CRD object itself, to delete the deployment and other objects (if any) that were created with it. Delete a pod. Scaling apps to zero to help save resources. StatefulSets are designed to run stateful applications in Kubernetes with dedicated persistent storage. As such, it is often used to guarantee the availability of a specified number of identical Pods. They manage the deployment of Replica Sets (also a newer concept, but pretty much equivalent to Replication Controllers), and allow for easy updating of a Replica Set as well as the ability to roll back to a previous deployment. Normal SuccessfulCreate Created pod: frontend-9si5l $ kubectl get pods NAME READY STATUS RESTARTS AGE frontend-9si5l 1/1 Running 0 1m frontend-dnjpy 1/1 Running 0 1m frontend-qhloh 1/1 Running 0 1m ReplicaSet as an Horizontal Pod Autoscaler target. For ReplicaSets, the kind is always a ReplicaSet. If you try to scale the replica set, then it will (for a very short time) have a new count of 5. answered Dec 26. you can create a new ReplicationController with the proper label selector and manage them again. Administration with kubeadm. Note: Labels in of replica set and service must be same. save the file. Horizontally scaling Pod. Replica Set is a next generation of replication controller. Time for scaling! 1st. That means it creates one or more set of the same Pods with the same container (s). Kubernetes Replication Controller vs DeploymentYou need to use -c flag to specify the Container name. Pro tip! To save time you can use kubectl to generate the YAML file boilerplate by running; kubectl create deployment --image=awesome-app-image awesome-app-deployment --dry-run -o yaml. As soon as the load generator script is stopped, there’s a cool down period, and after 1 minute or so the replica set is lowered to the. Using kubectl, we can apply this definition like: kubectl apply -f orphan. ReplicaSet 的名称必须是一个合法的 DNS. In this blog post we are going to discuss the ReplicaSet concept in Kubernetes. Enter the pod using kubectl exec: kubectl exec -it mongodb-replica-0 -n default -- mongo. Services provide discovery and routing between pods. 40:80 Service An abstract way to expose an application. When the control plane creates new Pods for a ReplicaSet, the . If there is a very large number of Pods, though. This is not perfect since it actually loads all replicasets and then filter them using unreliable way. kubectl delete rs {NAME_REPLICA_SET} kubernetes. After this, you can see the details of external-service using the following command: shell. name}) Show the. 1 Like. Replica Sets (usually written as . kubectl logs -l=app= {app-name} -c= {container-name} -n= {namespace} As you can see the options with the kubectl logs -h command. kubectl scale replicaset nginxset --replicas=4. metadata. The differences in this manifest are: Using kind: Deployment to state the resource type. 2. Lets now delete the pod created independent of replica set. 对于 ReplicaSet 而言，其 kind 始终是 ReplicaSet。. Certificate. Modified 3 years,. Follow edited Dec 26, 2018 at 9:32. When the Pod’s index is 0, it should be configured as the primary; when it’s a higher number, the Pod is a replica that needs to. First, check the existing replica set using the following command. The . kubectl get pods -l app NAME READY STATUS RESTARTS AGE web-0 1/1 Running 0. Replica-Sets replicate and manage pods, as well. It'll restart the pods one by one in a RollingUpdate way. yaml 384 clear 385 kubectl get pods 386 kubectl delete deploy my-dep 387 clear 388 kubectl get pods 389 clear 390 kubectl get pods 391 kubectl apply -f pod1. Deleting Replica Set. Manually by using the command. After going through the contents, now you’ll be familiar with the concept of ReplicationControllers and ReplicaSets and various commands associated with them in kubernetes. Verifying the replica set deployment and accessing the replica set. clusterIP}} Check the nginx welcome page is there via a browser or downloading it with curl:Then the docker. In this blog post we are going to discuss the ReplicaSet concept in Kubernetes. A simple case is to create one ReplicationController object to reliably run one instance of a Pod indefinitely. Define. Scale a replica set: kubectl scale --replicas=5 rs. Replication Controller and Replica Set do almost the same thing. 8. kubectl create -f my-replica-set. Thank you so much @Tej-Singh-Rana. A ReplicaSet ensures that a specified number of pod replicas are running at any given time. kubectl create -f statefulset. First, you deployed 3 replicas. 168. As such, it is often used to guarantee the availability of a specified. 0 as well as the. Usually, you define a Deployment and let that Deployment manage ReplicaSets automatically. This output shows that the ReplicaSet frontend along with the number of replicas currently running. Thanks this one worked. This should create the replica sets for MongoDb. I would like to get all ReplicaSets that have any problems using kubectl only without external monitoring systems. kubectl get daemonsets -A kubectl get rs -A | grep -v '0 0 0' Confirm that daemonsets and replica sets show all members in Ready state. Deploy Commands: rollout Manage the rollout of a resource scale Set a new size for a deployment, replica set, or. You can get the name of your replication controller using kubectl get rc. Manages the deployment and scaling of a set of Pods, and provides guarantees about the ordering and uniqueness of these Pods. Kubectl Scale use cases. Modified 5 years, 3 months ago. This would delete the DaemonSet with all the underlying pods it has created. Writing a ReplicaSet manifest. get: Prints basic information about matching objects. Before beginning this tutorial, you need to: Log into an IBM Cloud account. name of the ReplicaSet is part of the basis for naming those Pods. The ReplicaSet. To get more information about a specific replica set, run the command: $ kubectl describe replicasets <replicasetname> List ReplicaSets Info Services in Pods. $ kubectl get hpa. The name of a DaemonSet object must be a valid DNS subdomain name. Ask Question Asked 3 years, 6 months ago. The default Storage Class is standard. Whenever you deploy new version of deployment, the replica set preserves the previous configuration of the deployment. By adjusting the value in the manifest and re-applying it, you can alter the number of copies (kubectl apply -f my-manifest. $ kubectl get pods,replicasets --show-labels NAME READY STATUS RESTARTS AGE LABELS pod/kuard-fm8fd 1/1 Running 0 11m app=kuard pod/kuard-j6fcf 1/1 Running 0 11m app=kuard pod/kuard-jmqjv 1/1. Create ReplicaSet with 3 Replicas. Replica set, also termed as rs in short, is almost same as the replication controller is, only with a single difference. Run the above file using kubectl and create the backend replica set with the provided definition in the yaml file. kubectl edit pod <Name of the Pod> Step 3: Apply the pod by using the following command. An Azure Arc-enabled SQL Managed Instance deployed with one replica (default) View the pods. When you want all replica sets where the numbers for 'desired', 'current' and 'ready' are not the same use a better pattern matching language such awk: kubectl get replicasets -n kube-system | awk '$3!=$4 || $4!=$5 {print $0}' which should return both the header and any inconsistent replica sets. Share. shell. La version de l'API apps/v1beta2 est obsolète. 1. If you want the rolling update functionality please consider using Deployments instead. spec section is similar to the ReplicaSet’s, defining the pod template for each replica. Replica Sets. Normally, the old (previous). 492suser 0m0. kubectl scale rs/web --replicas= 2. 1. To start, run this little command: kubectl get rs --all-namespaces | wc -l.