Usually, you define a Deployment and let that Deployment manage ReplicaSets automatically. In this Kubernetes Tutorial we did a comparison between Replication Controller and Replica Set. The Replication Controller is the original form of replication in Kubernetes. What is a ReplicaSet in Kubernetes? ReplicaSet is the next-generation Replication Controller. Statefulsets is used for Stateful applications, each replica of. When we do deployment, replicaSet adds pod-template-hash label to pods. name of the ReplicaSet is part of the basis for naming those Pods. getenv ("MY_REPLICASET")) and have a result like: [frontend-b2zdv,frontend-vcmts,frontend-wtsmm] that is the pod names of all the container's replicas (also the current container of course) and eventually compare the current name in the name list to get my index in the list. if you have HPA set to min 5 and max 10, and you give replicas=2 in the yaml manifests then first it will create 2 replicas then when it will see that you have HPA min is 5 it will scale and bring 3 more replicas to make it at least 5. Yes. kubectl - Retrieving the current/"new" replicaset for a deployment in json format. I am learning concepts in kubernetes, when i am going through deployments and replicaset concepts i got one doubt that can replicasets and deployment be independent to each other. Replacing a specified replica set. Just change the replica count from 2 to 3 and apply the YAML file. 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. 2. For example, if a web application requires at least. Create a Replicaset; Create a Replicaset. 1 Answer. Let’s wait until its phase is ‘Running’. Use a SOCKS5 Proxy to Access the Kubernetes API; Set up Konnectivity service; TLS. Only the following resource creation is possible using kubectl create:. Replicaset doesnot update pods in when pod image is modified. Here the replicas field is set to 3, but you can set it to whatever fits your application. Try kind: Deployment. 对于 ReplicaSet 而言，其 kind 始终是 ReplicaSet。. This means that if any pod dies, it is immediately noticeable. Without a deployment, you’d need to create, update, and delete a bunch of pods manually. Example-2: Create replica set using match expressions. I have configured a mongodb on kubernetes with two replicas: * mongo-0 * mongo-1 And I have another pod with mongo-express * mongo-express The problem is, that, I want to connect mongo-express to primary mongo replica, but kubernetes is doing load balancing, so, some times it will connect as primary and others as secondaryThe Replica Set then uses this template, to create pods which it manages. yaml apiVersion: apps/v1 kind: ReplicaSet metadata: name: app-1 labels: app: app-1 spec: replicas: 10 selector: matchLabels: app: app-1 template: metadata: labels: app: app-1 spec: containers: - name: nginx image: nginx $ kubectl apply -f app-1-rs. Use a SOCKS5 Proxy to Access the Kubernetes API; Set up Konnectivity service; TLS. 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. The key difference between the replica set and the replication controller is, the replication controller only supports equality-based selector whereas the replica set supports set-based selector. As such, it is often used to guarantee the availability of a specified number of identical Pods. Moreover, a Deployment manages the deployment of a new version of an application. Replacing a specified resource quota. UPDATE: I was looking through the new features in Kubernetes 1. This property controls the number of pods to be created. k8s - Significance of ReplicaSet matchLabel selector. 9 versi API apps/v1 pada kind ReplicaSet adalah versi saat ini dan diaktifkan secara default. Also Read: A Complete Guide to Kubernetes Secrets. updateReplicasets. Confirm that you specified the correct external hostnames. 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. Automating MongoDB Replica set configuration on Kubernetes. Kubernetes - Replica Sets. Creating and Setup Kubernetes Replica Set. kubectl apply -f creates Replica Sets using a config file: kubectl apply -f replicaset-definition-file. We have a MongoDB cluster somewhere (the Source). Next, define PersistentVolumeClaims (PVCs) to set up persistent. Configure Certificate Rotation for the Kubelet; Manage TLS. Verifying the replica set deployment and accessing the replica set. The following procedure for TLS-Encrypted connections: Establishes TLS -encrypted connections between cluster shards. 0. kubernetes. StatefulSets. The Replicas are all up and. mongodb-1 – Read-only replica. (Remember, a controller in Kubernetes is what takes care of tasks to make sure the desired state of the cluster matches the observed state. TLS certificate; TLS key; CA key; TLS Certificate must contain DNS names of all your replica sets in Subject Alternative Name (SAN) sectionI assume that you want the default 'rolling upgrade' behavior of Deployments: they create a new replica set and start it before the old one is drained (rolling upgrade). R eplicaSet in similar to Replication controller , but the primary difference is w. Alternatively, you can also specify the replica set name and the ip addresses in a configuration file: replication: replSetName: "rs0". g. Therefore, unless the pod was not created using a controller, Kubernetes will not be able to recover it if a pod crashes inside your Node. Kubernetes — Replica Sets Replica Set ensures how many replicas of the pod should be running. There are two types of selectors i) Equality based Selector ii) Set-based Selectors. So, this looks enough for a replicaSet to check if enough pods are running. I have my DNS records pointing to each external SVC IP. g environment in (production, qa) or tier notin (frontend, backend)) as opposed to “equality-based”(e. A controller’s job is to monitor the current state of a resource such as pods or services and take action to ensure that the desired state is achieved. However, Deployment is a higher-level concept that manages. However, if you add an external domain to this setting, the replica set uses a hostname that is a subdomain of the specified domain instead. Kubernetes. It manages the lifecycle of pods and provides a way to scale and maintain the desired state of the application. 16 there is a feature gate called HPAScaleToZero which enables setting minReplicas to 0 for HorizontalPodAutoscaler resources when using custom or external metrics. Replicaset is one of the Kubernetes controllers. 04 EC2 Instances. I am looking for help with connecting to a mongo db replica-set , on K8s. The rolling update cycles previous Pod out and bring newer Pod in incrementally. For backwards compatibility, the previous Helm installation options, with the exception of Kubernetes resource settings, are also fully supported. Deployment creates a management object one level higher than a replica set, and enables you to deploy and manage updates for pods in a cluster. What we will do. kubectl create -f hpa-rs . A Deployment is defined with fields such as: selector: A label selector that specifies. The guide includes steps to run a standalone MongoDB instance and a replica set. The basic idea behind a replica (or instance or clone) is that if you have multiple, identical copies of. This is useful for deploying updates to an application or for. 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. Kubernetes ReplicaSets are a way of ensuring that a specified number of replicas (i. The main challenges of implementing Replica Set (as illustrated above) is Storage and Service Discovery, let. To restart the pod, use the same command to set the number of replicas to any value larger than zero: kubectl scale deployment. 0/16. selector: Selector is a label query over pods that should match the Replicas count. Most kubectl commands that support Replication Controllers also support ReplicaSets. For example, for a member of a replica set deployed on a Pod with the name rs-mongos-0-0, in the Kubernetes Operator service named mongo-0 that is created in the default mongodb namespace, the FQDN is:Wait for the MongoDB Replica Set to be fully deployed. replica_set. yml file called ‘frontend. After it's paused you can make necessary changes to your configuration and then resume it by using kubectl rollout resume. The build process of my project creates a Docker image and push it directly into the Docker engine of Minikube. If you are unsure about whether. Ensure that you add s for each Kubernetes pod that hosts a member of your replica set to the certificate. apps/app-1 created. 9) is a Kubernetes resource used to manage stateful applications. Administrar la federación de clústeres; Networking. svc. It can be configured with min and max number of replicas. gz StatefulSets. me@pooh ~ > kubectl get pods,services NAME READY STATUS RESTARTS AGE pod/kubernetes-bootcamp-5c69669756-lzft5 1/1 Running 0 43s pod/kubernetes-bootcamp-5c69669756-n947m 1/1 Running 0 43s pod/kubernetes-bootcamp-5c69669756-s2jhl 1/1 Running 0. To check your version of Kubernetes, run kubectl version. A Kubernetes Deployment provides means for managing a set of pods. In a nutshell, you run a sidecar app to configure the replica set for you, and either use a service per instance or ping the K8s API for the pod IP addresses. Kind you can write code to find the Pod manager/controller depending on the type (ReplicaSet, DaemonSet, etc). kubectl get pods NAME READY STATUS RESTARTS AGE my-app-replica-set-5c6b9bf7d8-6q8f2. deployment ==> replicaSet ==> Pod. Get a shell for the pod by executing the following command: kubectl exec --stdin --tty mysql-694d95668d-w7lv5 -- /bin/bash. It should be noted that the Kubernetes Deployment works fine if you have only one single MongoDB replica being deployed. StatefulSet is the workload API object used to manage stateful applications. The isMaster command will return the list of member hostname:port in the replica set, as entered in the. Set Kubernetes environment variables with kubectl. Seperti objek API Kubernetes lainnya, sebuah ReplicaSet membutuhkan field apiVersion, kind, dan metadata. To deploy mongo helm release use the command given below: $ sudo kubectl apply -f <mongodb-helm-release-name>. La version de l'API apps/v1beta2 est obsolète. local) as the default hostname. Modified 8 months ago. Install suggested plugins - to install the recommended set. We can create an Administrator for any single Pod among N-replicas. You can get the list of configured node ports using the command below: echo "$ (kubectl get svc. So, this looks enough for a. replication controller. Các nội dung trước chúng ta đã đi qua: Trong bài hôm nay chúng ta sẽ làm quen và thao tác với Kubernetes Deployment và ReplicaSet. Rolling updates allow Deployments' update to take place with zero downtime by incrementally updating Pods instances with new ones. cluster. Imperative config management with commands. In a Mongo shell, authenticate to the primary and create a read-only user for the Datadog Agent in the admin database:. It provides a declarative approach to managing Kubernetes objects, allowing for automated rollouts and rollbacks of containerized applications. //Successfull and working fine internally mongodb://db-mongodb-0. A complete discussion of updates is out of scope for this article -- we'll cover it in the future -- but couple of interesting things here: The StrategyType is RollingUpdate. Knowing the replica count in Kubernetes. Source: kubernetes. Scaling Your Application: An application can either be scaled up or down depending on the situation in two ways. We will manually create a Pod with labels that match the ReplicaSets selector labels ( app. 6. Claire Lee. Deployment handles the ReplicaSet, it gets. Let’s create a replicaset to understand this. This ensures one and only one instance will be maintained by the Replication Controller in the event of failure. svc. Deployments are a newer and higher level concept than Replication Controllers. And the -w argument is for watch so you have a refreshed interface that gives you infos on your hpa ressources. replicas: Replicas is the number of desired replicas. An alternative option is to initiate a rolling restart which lets you replace a set of Pods without downtime. Networking, including host and domain name resolution and routing is complex. Unlike a. A ReplicaSet's purpose is to maintain a stable set of replica Pods running at any given time. – Sahadat Hossain. ReplicaSets are a higher-level API that gives the ability to easily run multiple instances of a given pod. Use a SOCKS5 Proxy to Access the Kubernetes API; Set up Konnectivity service; TLS. Rolling updates also offer the ability to roll back to the previous version if any issues arise during the update process. Also, the rolling-update command is imperative whereas Deployments are declarative, so we. Writing a ReplicaSet manifest. Replication in MongoDB. kubectl scale deployment [deployment_name] --replicas=0. Add a new controller “MongoDbController”: The code will query and return all collections in the MongoDB replica set. The primary is the only member in the replica set that receives write operations. A Kubernetes replica set ensures that the specified number of pods in a replica set are running at all times. A ReplicaSet is a Kubernetes object that ensures that a specified number of replicas of a pod are running at any given time. Replica Set Resource: Its a k8s resource used to replicate a pod in order to have high availability. Usually, you define a Deployment and let that Deployment manage ReplicaSets automatically. However, if you add an external domain to this setting, the replica set uses a hostname that is a subdomain of the specified domain instead. Scaling pods horizontally is as easy as changing the desired replica count on a ReplicationController. For example, kubectl scale –replicas=2 rs/web. MySQL settings remain on insecure defaults to. ReplicaSet is as well associated with the pods through labels and selectors. Rolling index builds take at most one. The Deployment description is further expantiated below:. In Kubernetes, a ReplicaSet is responsible for maintaining the desired number of replicas of a pod to ensure high availability and load balancing in handling traffic. kubectl apply -f . 1. Dans Kubernetes 1. Comme avec tous les autres objets API Kubernetes, un ReplicaSet a besoin des champs apiVersion, kind et metadata . Normal ScalingReplicaSet Scaled up replica set nginx-deployment-2035384211 to 3 22s 22s 1 {deployment-controller } Normal ScalingReplicaSet Scaled up replica set nginx. Step 2: Edit the replicas property to the desired number of replicas: apiVersion: apps/v1 kind. First, we define our Kubernetes Deployment and then deploy it. edit the image name in the editor. 【Kubernetes. A simple and short explanation to understand Replication Controller and Replica Set in Kubernetes Services. Here are the steps: Get the name of the pod that you want to restart. Komodor’s platform empowers developers to confidently operate and troubleshoot their k8s applications. For example, you define how many replicas ( pods) of your app you want to run in the. initiate () You only have to initiate the replica set once. A Node. 1st:- Hit ! the command called. Establishes TLS -encrypted connections between client applications and MongoDB. Escribir un manifiesto de ReplicaSet. I wrote a detailed step-by-step tutorial here using more up to date methods. ReplicaSetの目的は、どのような時でも安定したレプリカPodのセットを維持することです。これは、理想的なレプリカ数のPodが利用可能であることを保証するものとして使用されます。 ReplicaSetがどのように動くか ReplicaSetは、ReplicaSetが対象とするPodをどう特定するかを示すためのセレクターや. 1 How to initialize replicaset remotely on. Replica Set is the next generation of Replication Controller. The functionality of both Replica Controller and Replica Set are quite the same - they are responsible to make sure that X number of pods with label that is equal to there label selector will be scheduled to different nodes on the cluster. ) – David Maze. kubernetes. The ReplicaSet configuration defines a number of identical pods. The following is an example ReplicaSet definition:2 answers to this question. Nodes. Conclusion. In order to make this work, you need to include. It provides features such as rolling updates, rollbacks, and scaling of the number of. Configure Certificate Rotation for the Kubelet; Manage TLS. - Created mongo instance in 3 pods. Learn how to manage Kubernetes applications using Kubernetes Deployment. default. To configure this integration for a MongoDB replica set: Prepare MongoDB. 0. You can get the list of configured node ports using the command below: echo "$ (kubectl. strategy: type: Recreate in the deployment spec. metadata: annotations: deployment. 0. You can think as with an RC → app=newsproducer,. the pod template specified inside the Deployment's yaml file, and the value of the replica field (which defines the size of the pod set). kubectl delete -f nginx-rs. What are ReplicaSets used for? ReplicaSet is used to deploy. Step1: Creating a GKE Cluster with 3 nodes. Kubectl Scale use cases. For ReplicaSets, the kind is always a ReplicaSet. Kubernetes will automatically create a new pod to replace the one you just deleted. Follow asked Jun 3, 2019 at 11:11. Configure Certificate Rotation for the Kubelet; Manage TLS. Some Kubernetes objects, such as services and replicationcontrollers, also use label selectors to specify sets of other resources,. Longhorn creates a dedicated storage controller for each block device volume and synchronously replicates the volume across multiple replicas stored. While Kubernetes can take care of many. g. To create and set up the Kubernetes replica set, we have to follow the below steps: 1. I wrote a detailed step-by-step tutorial here using more up to date methods. Kubernetes Documentation Reference. The example topology has a single primary server and multiple replicas, using asynchronous row-based replication. The rollout restart command is used to restart a deployment or a replica set in Kubernetes. Replication Controller . Al igual que con el esto de los objeto de la API de Kubernetes, un ReplicaSet necesita los campos apiVersion, kind, y metadata. local) as the default hostname. Edit the controllers configuration by using kubectl edit rs ReplicaSet_name and change the replicas count up or down as you desire. Step3: list the nodes of the cluster. yaml and submitting it to a Kubernetes cluster should create the defined HPA that autoscales the target ReplicaSet depending on the CPU usage of the replicated pods. To scale down the pods under we can use same scale command but here we have to reduce the number of replicas. All fine till here. When connecting to a replica set, the hostnames and IP addresses in the connection string are the seed list. When an HPA is enabled, it is recommended that the value of spec. The difference comes with the usage of selectors to replicate pods. A Replicaset is a K8s object, a set of Pod templates that describe a set of Pod replicas. For general information about working with config files, see running stateless applications and object management using kubectl. g environment in (production, qa) or tier notin (frontend, backend)) as opposed to “equality-based”(e. But I can only rephrase what I wrote in my previous post. Using YAML file to create ReplicaSet in Kubernetes is quite popular and is also the most preferable way. To delete. Xin chào các bạn, chúng ta lại tiếp tục với series k8s basic để cùng nhau làm quen với k8s. Use the kubectl get replicaset command to view the updated replica count: kubectl get rs frontend. These deployments are useful for working with a large amount of data and high loads. ReplicaSets Controller uses set-based selectors to manage the pods. 2. 2. kubernetes. Each controller manages a specific type of Kubernetes resource. To me that because compass use the topology that replica set use. 如果少于指定数量的pod. ymlAlternatively, you can also specify the replica set name and the ip addresses in a configuration file: replication: replSetName: "rs0". global. This article describes how to create, scale, and delete ReplicaSets in AKS hybrid, which are used to ensure that a stable set of replica pods are running at any given time. A ReplicaSet's purpose is to maintain a stable set of replica Pods running at any given time. I highly recommend reading it all. Additionally you can use KEDA for event-driven autoscaling. Avoid vendor lock-in and be able to run their databases anywhere. type to. Q&A for work. You do not associate the volume with any Pod. In this tutorial, I will be using v0. apps/nginx edited Old Replica set are removed. io/name: hello ). As an alternative to using this procedure, you can use the Multi-Kubernetes-Cluster Quick Start. print (k8s. Initially, you must deploy a Kubernetes cluster on GKE, which. g Hadoop cluster, MySQL cluster, where each node has its own storage. t the usage of selectors to replicate pods. Implementations (AKS/OnPrem/Minikube) AKS = Azure Kubernetes Service. A ReplicaSet (RS) is a Kubernetes object that ensures there is always a stable set of running pods for a specific workload. Scaling a StatefulSet refers to increasing or decreasing the number of replicas. 7. But an RS ( ReplicaSet) set-based label selector like “in, notin, exist”. Longhorn is a lightweight, reliable, and powerful distributed block storage system for Kubernetes. The DNS record of <release name>-mongodb-replicaset returns the address of all the replicas, so, in order to connect to the replicaset, the connection string is. using replica set you can easily run multiple pods of given instances. Replica Sets is a kubernetes object that ensures a certain number of pods are always running. The replica sets can be multiple up to a limit of 10 based on the number of updates that have been done using deployment. The template, below is an example of a spec. g environment = production or tier != frontend) which is what you use with replication controller. 今回はいよいよReplicaSetとDeploymentについて。 ReplicaSetについて. So, we will be using the following command: kubectl exec -it mongodb-0 -- mongo. Every time when we create a kubernetes object like Deployments, replica-sets, statefulsets. This is achieved by creating or removing pod replicas as necessary. This hostname uses the following format: <replica-set-name>-<pod-idx>. "someMongoUser" - name: MONGO_INITDB_ROOT_PASSWORD value: "somePassword" - name: MONGO_REPLICA_SET value: "myReplicaSet" - name: MONGO_PORT value:. In managed clusters you don't always have read access to the kube-system scheduler logs . When the controller creates new pods, it will have a generated name suffix after the pod name. Kubernetes Cluster should be set up at least with one worker node; Note: Check out the Step-by-Step Kubernetes Cluster Creation Guide video blog to learn how to create a three-node Kubernetes Cluster. This answer is out of date. EDIT: Actually, this didn't fix the entire problem. In Kubernetes, rolling updates are the default strategy to update the running version of your app. But only one replicaSet (the latest one) should be showing the number of pods; all other older sets should be showing 0. So I don't think reason 1 is applicable. To deploy MongoDB as a Replica Set with multiple pods, a Kubernetes StatefulSet deployment will be required. Similarly, the deployment script. En la versión 1. 4 min read. We can set revisionHistoryLimit to specify how many old replicaSet s we want to retain:. 3. This answer is out of date. And use standard connection string like you are in kubernetes :I have a mongo db replicaset running on kubernetes cluster ( on AWS EKS ) , say cluster-1. The example topology has a single primary server and multiple replicas, using asynchronous row-based replication. Kubernetes has a concept of "probes": readiness probe to make sure that the pod is up-and-running, liveness probe to make sure that the pod is still going well. So I don't think reason 1 is applicable. If TLS is enabled for a replica set, the Kubernetes Operator looks for certificates provided in the <prefix>-<resource-name>-cert secret or your secret storage tool. 0. 1. I highly recommend reading it all. To see the current status of the replica set, use rs. yaml, apply it and when I run 'kubectl get . once you have a mongodb cluster up and. More specifically, they’re called Kubernetes controllers. A ReplicaSet's purpose is to maintain a stable set of replica Pods running at any given time. 9 the API version apps/v1 on the ReplicaSet kind is the current version and is enabled by default. It seems to work for a few hours then all the readiness probes for all rs start to. In the ReplicaSet YAML file, the labels specified in spec. A ReplicaSet's purpose is to maintain a stable set of replica Pods running at any given time. A ReplicaSet's purpose is to maintain a stable set of replica Pods running at any given time. Replica sets provide redundancy and high availability and are the basis for all production. Declarative Management of Kubernetes Objects Using Configuration Files. Komodor is the only unified, dev-first Kubernetes Platform, designed to enable Kubernetes across on-prem and cloud-native environments through a single pane of glass. Configure Certificate Rotation for the Kubelet; Manage TLS. A DaemonSet also needs a . mongo, mongo-1. Like a Deployment, a StatefulSet manages Pods that are based on an identical container spec. This procedure allows you to set different settings for the replica set resource, such as overrides for statefulSet configuration. 确保pod数量：它会确保Kubernetes中有指定数量的Pod在运行。. StatefulSets are Kubernetes objects used to consistently deploy stateful application components. apps nginx deployment. yaml, this will instruct Kubernetes to scale the current number of Pods to the value of. 1. test. The efs-provisioner allows you to mount EFS storage as PersistentVolumes in Kubernetes. It has to be explicitly enabled as it's disabled by default. Tutorial steps: Introduction to Kubernetes,. We will create one . A ReplicaSet’s purpose is to maintain a stable set of replica Pods running at any given time. CONFIG_SVR: NO: false: Configures the configsvr variable when initializing the replicaset. StatefulSet is useful for running things in cluster e. Connect to mongodb replicaset in kubernetes with external access enabled. A replica set is a group of mongod instances that maintain the same data set. . Going to the Kubernetes Dashboard I can confirm that the deployment was correctly updated with the new metadata. The Kubernetes Operator verifies any TLS and X. replicaSetHorizons setting are correct. Now, a lot of support is available for running stateful applications with Kubernetes. Install kubectl and minikube. How to create a Kubernetes ReplicaSet Length: 03:15 | August 24, 2020 If you're looking to maintain a stable set of Kubernetes replica pods running at any given time, the tool you need is ReplicaSets. - Attached the 3 pods at startup in a replicaset - Exposed the services using K8s Services. If you have one container, or at least one "business-oriented" container in the pod, which is assumed by k8s architecture. One of the controllers in. yaml. 1. 1. You should now have a running replica set. 3. This setup allows Redis instances to recover from node failures, ensuring your application remains highly available. A replica set is a group of MongoDB deployments that maintain the same data set. As you can see, rather than listing the individual pods, Kubernetes shows us the Replica Set. ¶. To configure this check for an Agent running on Kubernetes:Copy. rs. Sorted by: 2. mongo, mongo-1. After you deploy MongoDB on kubernetes, to clean up the deployment objects, execute the following. This application is a replicated MySQL database. yaml. Learn the roles and differences of Pods, ReplicaSets and Deployments in Kubernetes, the most frequently used resource types for configuring your application's workloads and managing containers. Pods are best used for testing only. If we execute the commands: kubectl get sts mongodb and kubectl get pods -l app=mongodb , we see the cluster deployed. February 4, 2021. Meaning you can create a Replica set containing only one Pod specifying to run only one instance of that. La version de l'API apps/v1beta2 est obsolète. Stateful applications require pods with unique identities. To begin with, create an Express app first. So we tell Kubernetes, “I would like a replica set named web, which should have 3 pods, all matching the following specification. Call the ASP. <externalDomain> The replica set controller detected that and created a new Pod to match the replicas' desired number (5). annotate: Add or remove an annotation from an object. mongo. traceSampling Helm configuration option: $ istioctl install --set. stateful-set-name. Kubernetes always uses the same replica. AGE service/kubernetes ClusterIP 10.