These abstractions are powerful, but to fully leverage their power you still need to handle nuances specific to the stateful application under consideration. Confluent Operator allows you to deploy and manage Confluent Platform as a cloud-native, stateful container application on Kubernetes and OpenShift. For instance, here are some things specific to Kafka and need special care when deploying Kafka on Kubernetes. personal data will be processed in accordance with our Privacy Policy. To get a list of the Confluent Platform CRDs: To describe a specific Confluent Platform CRD: You can drill down the CRD specification by appending a You can get access by logging in to the Red Hat website. The Confluent for Kubernetes (CFK) bundle contains a Confluent kubectl plugin for interacting with On Mac OS and Linux, Confluent cloud. to be used for secure communication between the webhook server and the replacement, and this webhook is an additional safeguard for your Kafka data. Lets consider the four steps of adding brokers that we previously outlined. In the last few years, the rise of Kubernetes as the common operations runtime across a myriad of platforms in the enterprise cant be overlooked. helm upgrade command so that CFK can create the required ClusterRole and Provides server properties, JVM, and Log4j configuration overrides for from the kubectl explain output. CFK runs on Kubernetes, the runtime for private cloud architectures. set the following properties: When enabling the webhook to prevent unsafe Kafka pod deletion for clusters with Copyright Confluent, Inc. 2014-2023. You also agree that your everything up. . Expanding a Kafka cluster will then be as simple as running a single command. that the roles and role bindings were pre-created by your Kubernetes cluster admin, The same expectations of elasticity for fully managed data systems hold for self-managed environments, whether deploying on prem or in the cloud. Kubernetes ConfigMaps are a clean way to expose configuration to a service. After configuring the Deploy Key, you should see the following output from the make install-flux-dev command if the syncronization between FluxCD and the GitHub repository is set up properly: FluxCD will now begin to deploy the Kubernetes resources. Operator 1.x documentation, see Confluent Operator 1, or use the For this quick start guide, your Kubernetes cluster is assumed to have a default dynamic After this startup period, verify the applications are deployed with the command below, which will show you various Kubernetes resources deployed in the default namespace. Lets walk through the process in the rest of the blog post. Copyright Confluent, Inc. 2014-2023. The following are /usr/local/bin/. You also agree that your However, as the user responsible for The Confluent Operator includes an implementation of the Kubernetes Operator API that provides deployment and management automation for Kafka and the Confluent Platform on Kubernetes. Sign up to let us know that you are interested! In order to deploy OCP successfully, you need to have an account with a cloud provider like AWS and with privileges to provision EC2 instances, modify Route 53 hosted zone settings, access and provision ebs volumes. Video courses covering Apache Kafka basics, advanced concepts, setup and use cases, and everything in between. for automated provisioning, management, and operations of Apache Kafka on Kubernetes. Copyright Confluent, Inc. 2014- Cloud-native data systems are expected to scale up as demand peaks and scale down as demand falls, removing the need for detailed capacity planning while ensuring businesses and applications built on top of Kafka can meet the real-time expectations of customers. They are well integrated with the managed Kubernetes offering. FluxCD is configured to sync with the Git repository once per minute. This in-depth tutorial shows you how to configure a Kafka server on a Kubernetes cluster. Configuration Reference. This will allow the standard CLI ), Case Study: Kafka Connect management with GitOps, Deploy Hybrid Confluent Platform and Cloud Environment, Tutorial: Introduction to Streaming Application Development, Clickstream Data Analysis Pipeline Using ksqlDB, Replicator Schema Translation Example for Confluent Platform, Configure Automatic Startup and Monitoring, Migrate Confluent Cloud ksqlDB applications, Connect ksqlDB to Confluent Control Center, Connect Confluent Platform Components to Confluent Cloud, Pipelining with Kafka Connect and Kafka Streams, Tutorial: Moving Data In and Out of Kafka, Single Message Transforms for Confluent Platform, Configuring Kafka Client Authentication with LDAP, Authorization using Role-Based Access Control, Tutorial: Group-Based Authorization Using LDAP, Configure Audit Logs using the Confluent CLI, Configure MDS to Manage Centralized Audit Logs, Configure Audit Logs using the Properties File, Log in to Control Center when RBAC enabled, Create Hybrid Cloud and Bridge-to-Cloud Deployments, Transition Standard Active-Passive Data Centers to a Multi-Region Stretched Cluster, Replicator for Multi-Datacenter Replication, Tutorial: Replicating Data Across Clusters, Installing and Configuring Control Center, Check Control Center Version and Enable Auto-Update, Connecting Control Center to Confluent Cloud, Confluent Monitoring Interceptors in Control Center, Docker Configuration Parameters for Confluent Platform, Configure a Multi-Node Environment with Docker, Confluent Platform Metadata Service (MDS), Configure the Confluent Platform Metadata Service (MDS), Configure Confluent Platform Components to Communicate with MDS over TLS/SSL, Configure mTLS Authentication and RBAC for Kafka Brokers, Configure Kerberos Authentication for Brokers Running MDS, Configure LDAP Group-Based Authorization for MDS, DevOps for Apache Kafka with Kubernetes and GitOps Blog post, https://kubernetes.io/docs/tasks/tools/install-kubectl/, https://docs.fluxcd.io/en/1.18.0/references/fluxctl.html, https://kubernetes-sigs.github.io/kustomize/installation/, https://github.com/bitnami-labs/sealed-secrets. OCP does come with lots of responsibilities, like securing control of the Kubernetes primary nodes, managing the etcd store, handling Kubernetes version updates, and more. Confluent Platform will soon have three key features that significantly simplify the process of scaling a Kafka cluster: Each of these features on their own are tremendously valuable, whether you want to deploy on Kubernetes, increase the amount of data stored in Kafka, or eliminate any need to manually rebalance a cluster. If you deployed CFK using the Helm repo, download and unpack the CFK In order to run a copy of the streaming-ops project you will need a Confluent Cloud account. If you are using Helm repo to deploy CFK, pull the CFK Chart: The values.yaml file is in the It is designed to deliver single-digit millisecond query performance at any scale. For example: By default, when you deploy CFK via helm, the helm command also installs the components. (min.insync.replicas), into consideration. After installation, FluxCD is waiting to successfully connect to the configured GitHub repository. to use Krew to install the Confluent plugin. In the following case studies we investigate some common DevOps tasks you may need to accomplish in your own production environment when targeting Confluent Cloud. This includes a rollout of pre-built Docker images for the entire Confluent Platform, Kubernetes deployment templates, a reference architecture that enables users to deploy Kafka and Confluent Platform on Kubernetes and an implementation of the. Because partition replicas hold less data on the broker itself, partition reassignments also require less data to be shifted across the cluster. The OpenShift Container Platform really shines if the Kubernetes cluster is deployed on prem or in the case where managed Kubernetes services cannot be used, perhaps for compliance reasons. Save 25% or More on Your Kafka Costs | Take the Confluent Cost Savings Challenge. Custom Resource Definitions allow you to define your own objects that become part of the Kubernetes API. more replicas. This will allow the standard CLI kubectl to find the Copyright Confluent, Inc. 2014- Install the Confluent plugin using the following command: For example, to install the plugin on MacOS: By clicking "SIGN UP" you agree to receive occasional marketing emails from Confluent. then you must ensure that your > matches the subject To instruct helm to skip trying to install the CRDs, add If your cluster has public nodes (which is true for the local dev cluster setup in these instructions), you can obtain and save the public key using: If you are using an existing cluster that is private (kubeseal cannot reach the secret controller because of network policies), you need to copy the secret controllers key from the secret controllers log file into the key file stored locally. You can validate your secrets/key/dev.crt file contents with: Verify with a result that looks similar to: The process for sealing secrets will follow this pattern (example commands are given after this explanation): The following steps guide you through this process. administrator. customization of all Confluent Platform components. Broker Configurations. (Read about that, if youd like to take it for a spin when its available! Use the following command to get the comprehensive usage instruction: The following are some of the example commands: To see all of the external and internal endpoints that you can use to access To avoid having an internal ksqlDB topic with min in-sync replicas set to 1, set the ksqlDB internal topic replicas setting to 3 using Note that CFK also supports Confluent REST Proxy that is not shown in the diagram. For stateful components like Kafka and ZooKeeper, the Helm Charts use both StatefulSets to provide an identity to each pod in the form of an ordinal index, and Persistent Volumes that are always mounted for the pod. At Confluent, our mission is to put a Streaming Platform at the heart of every digital company in the world. And to further examine the affinity field listed in the output: Confluent plugin is a composite CLI tool integrated with the Kubernetes With Tiered Storage, you can leverage cheaper object storage and can scale up storage and compute resources independently of one another, enabling even more efficient scaling of the clusters infrastructure. Let us know if you are interested and well notify you when its available! webhooks enabled, add the kubernetes.io/metadata.name label on all debug and diagnose your Confluent Platform deployed through Confluent for Kubernetes (CFK). plugin. in the spec.authorization.superUsers list, create a rolebinding CR for that To learn about the Kubernetes and Confluent concepts that are important for a This can be useful for interacting with services and resources from inside the cluster. Provide TLS keys and certificates in PEM format. This is a cluster-wide setting and needs to be run once. Confluent for Kubernetes (CFK) was made available in spring of 2021 and allows users to deploy Confluent for Kubernetes in on-premise environments. With a StatefulSet deployment of Kafka brokers, ZooKeeper ensembles, Schema Registry, and the Connect framework, the business logic of each component is ingrained into the Kubernetes API, resulting in clusters that are self-healing in the event of any failureswhich is truly a game-changer for the cloud-native deployment of Confluent Platform everywhere. Confluent REST Proxy) and application resources (such as topics, rolebindings) Add this deploy key to your GitHub forked repository under Settings->Deploy keys, giving the key write access to the repository. It can also be adjusted based on how many resources you want to deploy. The following shows the high-level architecture of CFK and Confluent Platform in Kubernetes. Modified 3 years, 11 months ago. document.write(new Date().getFullYear()); Deploy CFK with the -set kRaftEnabled=true flag in the configOverrides in the ksqlDB CR: Before you deploy CFK with webhooks enabled, you must provide TLS certificates Install Krew as described in Krew User Guide. Although these Kubernetes primitives are great building blocks, they still leave a large burden on users to set them all up correctly, and in their general form, they dont understand the specifics of the application enough to manage the entire application lifecycle. The StatefulSet abstraction in Kubernetes makes this somewhat easier to do, but still, special care is needed while scaling the Kafka pods to either add or remove a Kafka pod to the cluster. For example, the user can tell the system the equivalent of I want a three-node ZooKeeper cluster with SSD storage and a six-node Kafka cluster with 16TB HDD storage per node.. For example, to deploy five Kafka brokers and set a custom `min.insync.replicas`, create a copy of the default YAML template, update the values, and use it to install the configuration: Special thanks to Qi Shao, Nikhil Chandrappa, Li Wang, Amey Banarse and Prasad Radhakrishnan from Pivotals (NYSE: PVTL) Platform Architecture team for their contributions in developing and testing these Helm Charts. See the Bitnami docs for long term management of secrets and more details on private clusters . This command will place the sealed secrets in secrets/sealed/dev, and these files are safe to commit to the Git repository. An example of this is the upgrade to a version of Kafka that includes changes to the on-disk data format and/or the inter-broker protocol, as in Kafka 1.0.x. For the purpose of this blog, I will be deploying on AWS. The minimum in-sync replicas setting on all topics is assumed to be 2 for Kafka with 3 or personal data will be processed in accordance with our Privacy Policy. This webhook only applies to the components that have persistent volumes, If you'd like to use an existing Kubernetes cluster, you only need to ensure your kubectl command is configured to administer it properly. With my OCP Kubernetes cluster on AWS, I have aws-ebs as the StorageClass provisioner for the cluster. Ask Question Asked 3 years, 11 months ago. Helm 3 installed. This webhook blocks deletion requests on CRs with PVs in ReclaimPolicy: Adding nodes to a Kafka cluster requires manually assigning some partitions to the new brokers so that load is evenly spread across the expanded Kafka cluster. kubectl to find the plugin. You can then specify the desired state that those object types should be in for correct operation of the stateful application. The Confluent Operator directly addresses the challenges of running Apache Kafka on Kubernetes, and will offer the following features across all Confluent Platform components: In the next month, well release a reference architecture along with a set of deployment templates and Confluent Platform docker images. Apache, Apache Kafka, Kafka, and associated open source project names are trademarks of the Apache Software Foundation, Be the first to get updates and new content, Plan for Confluent Platform Deployment using Confluent for Kubernetes, Configure Role-Based Access Control (RBAC), Migrate from Operator to Confluent for Kubernetes, Migrate On-premise Deployment to Confluent for Kubernetes, Confluent for Kubernetes Blueprints User Guide. We can fill the gap using two of the powerful extensibility features of Kubernetes: Custom Resource Definitions and Operators. Apache, Apache Kafka, Kafka, and associated open source project names are trademarks of the Apache Software Foundation, Confluent vs. Kafka: Why you need Confluent, Kora, The Apache Kafka Engine, Built for the Cloud, Watch demo: Kafka streaming in 10 minutes, on Kubernetes is an important part of our mission to put a streaming platform at the heart of every company. By the middle of this year, we will start early access for the Kubernetes Operator. location; we will refer to this location as . property. This quick start gets you up and running with Confluent for Kubernetes (CFK). Automated data balancing to distribute replicas evenly across all brokers in a Kafka cluster, after new brokers are added to the cluster during a scale up operation, as well as, before existing brokers are deleted from the cluster during a scale down operation. storage provisioner. specify a list of namespaces for CFK to watch. What does the Confluent Operator do for you? You have the following options to install connector plugins in Confluent for Kubernetes (CFK): Automatically download and install connector plugins. It also covers our approach to networking, storage, traffic, log aggregation, metrics and more. Select the one that was created for this purpose or use an existing one. The responsibility for installing CRDs may only belong to your Kubernetes The Confluent Operator includes an implementation of the Kubernetes Operator API that provides deployment and management automation for Kafka and the Confluent Platform on Kubernetes. For the last step in particular, rebalancing partitions across the brokers is not only complex but can also result in diminished cluster performance as partitions are shifted. Kafka categorizes the messages into topics and stores them so that they are immutable. See Install Confluent plugin for installation instructions. Without this prevention, a CR deletion will result in the deletion Thats why, just as we are doing with Confluent Cloud, we are continuing to introduce product features in Confluent Platform that enable Kafka users to scale their self-managed clusters with the benefits of elasticity. This includes a rollout of pre-built Docker images for the entire Confluent Platform, Kubernetes deployment templates, a reference architecture that enables users to deploy Kafka and Confluent Platform on Kubernetes and an implementation of the Kubernetes Operator API for automated provisioning, management, and operations of Apache Kafka on Kubernetes. In the context of GitOps for Confluent, suitable policies Amazon DynamoDB is a fully managed, serverless, key-value NoSQL database service that is highly available and scalable. There are two specific secrets required to utilize this project. Confluent for Kubernetes provides a complete, declarative API-driven experience for deploying and self-managing Confluent Platform as a cloud-native system. If youd like to know more, you can download the Confluent Operator to get started with the leading distribution of Apache Kafka. all Kafka topics if that user is not a super user. --skip-crds to the install command: By default, when you deploy CFK via helm, the helm command also creates the This webhook blocks delete requests on CFK StatefulSets. With Confluent Operator, we are productizing years of Kafka experience with Kubernetes expertise to offer you the best way of using Apache Kafka on Kubernetes. Krew is the plugin manager for kubectl. namespace or for a component CR. FluxCD requires access to your Git repository in order to facilitate GitOps based continuous delivery. These CRDs describe how to configure Confluent Platform components. Webhook to prevent component deletion when its persistent volume (PV) reclaim policy is set to Delete. production deployment, read through the various pages in the CFK The ordinal index that the Kubernetes StatefulSet assigns to each Kafka pod must be propagated to be its broker id, and if you want to ensure that your Kafka cluster is deployed evenly across multiple racks or availability zones, then at configuration time, racks must be assigned appropriately to Kafka pods. There are lots of vendors that support Kubernetes persistent storage layers. From the directory where you deployed CFK, unpack the kubectl plugin But isolating the value of each feature doesnt tell the whole story, as they complement one another in ways that transform Kafka into a data system that is more elastic. This webhook does not take the Kafka setting, minimum in-sync replicas When signing up for a new account, use the promo code DEVOPS200 to receive an additional $200 free usage (details). Tiered Storage also fundamentally changes the length of time needed to complete a rebalance when brokers are added. Confluent for Kubernetes (CFK) provides the custom resource definitions (CRDs) that were namespaces where the webhooks should validate requests on. Take the following steps if you want A wide range of resources to get you started, Build a client app, explore use cases, and build on our demos and resources, Confluent proudly supports the global community of streaming platforms, real-time data streams, Apache Kafka, and its ecosystems. Prior to Confluent, he worked at IBM in its analytics consulting practice. A single deployment of the Confluent Operator allows you to deploy multiple Kafka clusters. The project uses Kubernetes to host applications connected to Confluent Cloud Kafka and Schema Registry. The k8s event . An example of the layout of this file can be found in the sample secrets/example-connect-operator-secrets.props. Use Confluent Control Center to monitor the Confluent Platform, and see the created topic and data. With Operator, you can simply scale up disk capacity for the existing brokers without needing to add new brokers to the cluster. Download Confluent Operator and unzip the package. A Kubernetes cluster conforming to one of the supported versions. It is not over yetall these nuances in configuration need to be applied correctly as well. A chart is a collection of YAML templates that describe a related set of Kubernetes resources. If you are using another operating system or prefer to manually install the dependencies, you can skip this step and follow the individual tool installation instructions below. Update the values.yaml file as described above, and The Confluent for Kubernetes (CFK) bundle contains Helm charts, templates, and scripts for It will create Confluent Cloud environments, clusters, topics, ACLs, service accounts, and potentially other Confluent Cloud resources that are billable. For the configuration settings for Confluent Platform components, see Confluent Platform If the Kubernetes cluster (e.g., OCP) is deployed on prem, then your choice might be limited to what is already available for persistent storage in your Kubernetes clusters. Through this experience, we realized that the right product to run Kafka on Kubernetes would need to combine both Kafka and Kubernetes expertise, and the Confluent Operator does exactly that. Apache, Apache Kafka, Kafka, and associated open source project names are trademarks of the Apache Software Foundation, Be the first to get updates and new content, Configure Role-Based Access Control (RBAC), Migrate from Operator to Confluent for Kubernetes, Migrate On-premise Deployment to Confluent for Kubernetes, Confluent for Kubernetes Blueprints User Guide. He has supported industry verticals ranging from large financial services, retail, healthcare, telecom, and utilities companies. feature in CFK to pass the configuration property to Kafka. through Infrastructure as Code (IaC). Disable the webhook that validates CR deletion for PV reclaim policy: For example, to allow Kafka CR deletion when PVs are in the Delete mode, Credentials for the database need to be created as a Secret inside the Kubernetes cluster. confluent-operator..svc, which is the cluster-internal DNS name These templates enable developers to quickly provision Apache Kafka, Apache ZooKeeper, Confluent Schema Registry, Confluent REST Proxy, and Kafka Connect on Kubernetes, using official Confluent Platform Docker images. There isnt a need to create a personal copy of the database credentials file, as that service is ran entirely inside the Kubernetes cluster and is not publicly accessible. Video courses covering Apache Kafka basics, advanced concepts, setup and use cases, and everything in between. And, from the experience of running Kafka clusters on Kubernetes in production for a while, weve also learned that Kafka pod configuration fields like Memory, CPU, and Disks must also be validated. values file and others on the command line with the. personal data will be processed in accordance with our Privacy Policy. calculates and sets the values based on the relevant factors. Once installed, the OpenShift installer and OpenShift command line utility (oc) are ready for use. After setting the connector info and other required settings, deploy Connect with kubectl apply. downloaded bundle: From the helm sub-directory of where you downloaded the CFK bundle, For reference, This file contains the raw secret data and, Create a local Kubernetes Secret manifest file using the. values are set based on the broker replica count. In the last few years, the rise of Kubernetes as the common operations runtime across a myriad of platforms in the enterprise cant be overlooked. Strimzi is an open-source project to provide containers and Kubernetes operators that allow for the management and configuration of Kafka on Kubernetes. Running helm status kafka-oc-demo gives you the details needed for external and internal client access. Because the resource needs of the cluster will change as more and more data is sent into Kafka, an ideal solution is to start with a smaller, efficient cluster and then expand it as the use case expands. Whether your access to AWS is via a root login (not recommended) or via SSO, you must create a user. This document contains usage instructions and highlights of the project. The Sealed Secrets are committed to the Git repository and later installed into the Kubernetes cluster by the GitOps process. Helm, you can: Refer to Helm documentation for more details on the Helm flags. To overcome some of these challenges, the Kubernetes community introduced the StatefulSets and Persistent Volumes abstractions.
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