Single-tenant, high-availability Kubernetes clusters in the public cloud. Fast and secure way to containerize and deploy enterprise workloads in Kubernetes clusters. Build, deploy and manage your applications across cloud- and on-premise infrastructure.
Check out the latest Operator news. An Operator is a method of packaging, deploying and managing a Kubernetes-native application. A Kubernetes-native application is an application that is both deployed on Kubernetes and managed using the Kubernetes APIs and kubectl tooling.
A controller is a core concept in Kubernetes and is implemented as a software loop that runs continuously on the Kubernetes master nodes comparing, and if necessary, reconciling the expressed desired state and the current state of an object. Operators apply this model at the level of entire applications and are, in effect, application-specific controllers. It introduces new object types through Custom Resource Definitions, an extension mechanism in Kubernetes.
These custom objects are the primary interface for a user; consistent with the resource-based interaction model on the Kubernetes cluster. An Operator watches for these custom resource types and is notified about their presence or modification.
Get the e-book. The Operator Framework is an open source project that provides developers and cluster administrators tooling to accelerate development and deployment of an Operator. Enables developers to build Operators based on their expertise without requiring knowledge of Kubernetes API complexities. Oversees installation, configuration, and updates, during the lifecycle of all Operators and their associated services running across a Kubernetes cluster.
Usage reporting for Operators that provide specialized services. Follow the code-to-cluster walkthrough. With access to community Operators, developers and cluster admins can try out Operators at various maturity levels that work with any Kubernetes. Check out the community Operators on OperatorHub. It also provides a useable scaffolding so developers can focus on adding business logic for example, how to scale, upgrade, or backup the application it manages.
Leading practices and code patterns shared across Operators are included in the SDK to help prevent duplicating efforts.Build, deploy and manage your applications across cloud- and on-premise infrastructure. Single-tenant, high-availability Kubernetes clusters in the public cloud.
The fastest way for developers to build, host and scale applications in the public cloud. Toggle nav. In OpenShift Container Platform 4.
It is part of the Operator Frameworkan open source toolkit designed to manage Kubernetes native applications Operators in an effective, automated, and scalable way.
The OpenShift Container Platform web console provides management screens for cluster administrators to install Operators, as well as grant specific projects access to use the catalog of Operators available on the cluster. For developers, a self-service experience allows provisioning and configuring instances of databases, monitoring, and big data services without having to be subject matter experts, because the Operator has that knowledge baked into it.
It is the metadata that accompanies an Operator container image, used to populate user interfaces with information like its logo, description, and version. Configures all Operators deployed in the same namespace as the OperatorGroup object to watch for their Custom Resource CR in a list of namespaces or cluster-wide. The OLM Operator is not concerned with the creation of the required resources; users can choose to manually create these resources using the CLI, or users can choose to create these resources using the Catalog Operator.
This separation of concern enables users incremental buy-in in terms of how much of the OLM framework they choose to leverage for their application. While the OLM Operator is often configured to watch all namespaces, it can also be operated alongside other OLM Operators so long as they all manage separate namespaces.
If so, runs the install strategy for the CSV. The Catalog Operator is responsible for resolving and installing CSVs and the required resources they specify. It is also responsible for watching CatalogSources for updates to packages in channels and upgrading them optionally automatically to the latest available versions.
A user that wishes to track a package in a channel creates a Subscription resource configuring the desired package, channel, and the CatalogSource from which to pull updates. When updates are found, an appropriate InstallPlan is written into the namespace on behalf of the user.
Users can also create an InstallPlan resource directly, containing the names of the desired CSV and an approval strategy, and the Catalog Operator creates an execution plan for the creation of all of the required resources. Watches for resolved InstallPlans and creates all of the discovered resources for it if approved by a user or automatically.
A package manifest is an entry in the Catalog Registry that associates a package identity with sets of CSVs. Within a package, channels point to a particular CSV. Because CSVs explicitly reference the CSV that they replace, a package manifest provides the Catalog Operator all of the information that is required to update a CSV to the latest version in a channel stepping through each intermediate version.
An Operator is considered a member of an OperatorGroup if the following conditions are true:. The Operator can be a member of an OperatorGroup that selects its own namespace.
The Operator can be a member of an OperatorGroup that selects more than one namespace. The Operator can be a member of an OperatorGroup that selects all namespaces target namespace set is the empty string "". If more than one OperatorGroup exists in a single namespace, any CSV created in that namespace will transition to a failure state with the reason TooManyOperatorGroups.
CSVs in a failed state for this reason will transition to pending once the number of OperatorGroups in their namespaces reaches one. Specify the set of namespaces for the OperatorGroup using a label selector with the spec.Single-tenant, high-availability Kubernetes clusters in the public cloud. Fast and secure way to containerize and deploy enterprise workloads in Kubernetes clusters.
Build, deploy and manage your applications across cloud- and on-premise infrastructure. Back to blog. December 3, by Alex Handy.
This is a guest post from Redis Labs. During the last few releases of Kubernetes, the Kubernetes community has managed to optimize the running of stateful applications by releasing new core primitives. For instance, the general availability of StatefulSet allows users to run stateful applications like databases on a Kubernetes and or Red Hat OpenShift cluster.
The introduction of the new core primitives allows OpenShift users to bring different application workloads onto a single OpenShift cluster. However, running complex use cases and or stateful applications via the built-in Kubernetes primitives continues to be a challenge. This is where the Kubernetes Operators come into the picture. Operators allow users to extend the Kubernetes primitives using custom resources and custom controllers. The Operator Framework essentially focuses on deploying and managing a stateful application by extending the Kubernetes application programming interfaces APIs.
The Operator SDK allows an application developer, such as a database vendor, to embed the domain-specific logic into the operator and extend the Kubernetes API. Red Hat has also included a few custom resources and operators in OpenShift release 3.
Operators are becoming a standard way of deploying complex stateful applications in Kubernetes. Redis Labs adopted the Operator Framework to enable our users to more efficiently deploy and manage the lifecycle of their Redis Enterprise clusters. The custom controller, which is a Redis Enterprise operator written in the Go programming language, allows us to embed application-specific lifecycle management logic into the operator.
Using the operator, we are able to validate the state of the Redis Enterprise cluster.OpenShift 4 Red Hat Operators
We take advantage of the multi-tenancy features offered by projects in the OpenShift platform and use the security context constraint it provides. We have published our sample security context constraint SCC deployment files for the OpenShift platform.
Since adopting the Operator Framework, we continued to work with Red Hat to continually improve and enhance solutions like an ingress controller, which we currently plan to integrate with the OpenShift router.
Operator FrameworkOperators. Why an Operator? OpenShift Specific Features We take advantage of the multi-tenancy features offered by projects in the OpenShift platform and use the security context constraint it provides. Figure 1: Redis Enterprise on the OpenShift container platform.
Keep reading. March 24, Fully Automated Management of Egress IPs with the egressip-ipam-operator Introduction Egress IPs is an OpenShift feature that allows for the assignment of an IP to a namespace the egress IP so that all outbound traffic from that namespace appears as if it is originating March 9, What makes a good Operator?
InCoreOS coined the term, Operator. They started a movement about a whole new type of managed application that achieves automated Day-2 operations with a user-experience that feels native toBuild, deploy and manage your applications across cloud- and on-premise infrastructure. Single-tenant, high-availability Kubernetes clusters in the public cloud. The fastest way for developers to build, host and scale applications in the public cloud.
Installing the Operator Framework (Technology Preview)
This guide walks cluster administrators through installing Operators to an OpenShift Container Platform cluster. You can then subscribe the Operator to one or more namespaces to make it available for developers on your cluster. Choose All namespaces on the cluster default to have the Operator installed on all namespaces or choose individual namespaces, if available, to only install the Operator on selected namespaces.
If an Operator is available through multiple channels, you can choose which channel you want to subscribe to. For example, to deploy from the stable channel, if available, select it from the list. You can choose Automatic or Manual updates. If you choose Automatic updates for an installed Operator, when a new version of that Operator is available, the Operator Lifecycle Manager OLM automatically upgrades the running instance of your Operator without human intervention.
If you select Manual updates, when a newer version of an Operator is available, the OLM creates an update request. As a cluster administrator, you must then manually approve that update request to have the Operator updated to the new version. This procedure uses the Couchbase Operator as an example to install and subscribe to an Operator from the OperatorHub using the OpenShift Container Platform web console. Access to an OpenShift Container Platform cluster using an account with cluster-admin permissions.
Scroll or type a keyword into the Filter by keyword box in this case, Couchbase to find the Operator you want. Select the Operator. You must acknowledge that warning before continuing. Information about the Operator is displayed.
All namespaces on the cluster default installs the Operator in the default openshift-operators namespace to watch and be made available to all namespaces in the cluster. This option is not always available. A specific namespace on the cluster allows you to choose a specific, single namespace in which to install the Operator.
Understanding the Operator Lifecycle Manager
The Operator will only watch and be made available for use in this single namespace. Select Automatic or Manual approval strategy, as described earlier. Click Subscribe to make the Operator available to the selected namespaces on this OpenShift Container Platform cluster. After approving on the Install Plan page, the Subscription upgrade status moves to Up to date.Build, deploy and manage your applications across cloud- and on-premise infrastructure.
Single-tenant, high-availability Kubernetes clusters in the public cloud. The fastest way for developers to build, host and scale applications in the public cloud. Toggle nav. Conceptually, Operators take human operational knowledge and encode it into software that is more easily shared with consumers.
Operators are pieces of software that ease the operational complexity of running another piece of software. Advanced Operators are designed to handle upgrades seamlessly, react to failures automatically, and not take shortcuts, like skipping a software backup process to save time.
More technically, Operators are a method of packaging, deploying, and managing a Kubernetes application. A Kubernetes application is an app that is both deployed on Kubernetes and managed using the Kubernetes APIs and kubectl or oc tooling. To be able to make the most of Kubernetes, you require a set of cohesive APIs to extend in order to service and manage your apps that run on Kubernetes. Think of Operators as the runtime that manages this type of app on Kubernetes.
A place to encapsulate knowledge from field engineers and spread it to all users, not just one or two. Kubernetes and by extension, OpenShift Container Platform contains all of the primitives needed to build complex distributed systems — secret handling, load balancing, service discovery, autoscaling — that work across on-premise and cloud providers.
A Service Broker is a step towards programmatic discovery and deployment of an app. However, because it is not a long running process, it cannot execute Day 2 operations like upgrade, failover, or scaling. Off-cluster services continue to be a good match for a Service Broker, although Operators exist for these as well.
The Operator Framework is a family of tools and capabilities to deliver on the customer experience described above. It is not just about writing code; testing, delivering, and updating Operators is just as important. The Operator Framework components consist of open source tools to tackle these problems:.
The Operator SDK assists Operator authors in bootstrapping, building, testing, and packaging their own Operator based on their expertise without requiring knowledge of Kubernetes API complexities.
Deployed by default in OpenShift Container Platform 4. The OperatorHub is a web console for cluster administrators to discover and select Operators to install on their cluster. It is deployed by default in OpenShift Container Platform. Operator Metering collects operational metrics about Operators on the cluster for Day 2 management and aggregating usage metrics.Build, deploy and manage your applications across cloud- and on-premise infrastructure.
Single-tenant, high-availability Kubernetes clusters in the public cloud. The fastest way for developers to build, host and scale applications in the public cloud. Toggle nav. When developing microservices-based applications to run on cloud native platforms, there are many ways to provision different resources and share their coordinates, credentials, and configuration, depending on the service provider and the platform.
This allows users to connect any of their applications deployed in OpenShift Container Platform to a wide variety of service brokers. The service catalog allows cluster administrators to integrate multiple platforms using a single API specification.
Understanding the Operator Lifecycle Manager
The OpenShift Container Platform web console displays the cluster service classes offered by service brokers in the service catalog, allowing users to discover and instantiate those services for use with their applications. As a result, service users benefit from ease and consistency of use across different types of services from different providers, while service providers benefit from having one integration point that gives them access to multiple platforms.
New terms in the following are defined further in Concepts and Terminology. When a user makes a request to provision or deprovision a resource, the request is made to the service catalog, which then sends a request to the appropriate cluster service broker. With some services, some operations such as provisiondeprovisionand update are expected to take some time to fulfill. If the cluster service broker is unavailable, the service catalog will continue to retry the operation.
This infrastructure allows a loose coupling between applications running in OpenShift Container Platform and the services they use. This allows the application that uses those services to focus on its own business logic while leaving the management of these services to the provider.
When a user is done with a service or perhaps no longer wishes to be billedthe service instance can be deleted. In order to delete the service instance, the service bindings must be removed first. Deleting the service bindings is known as unbinding. Part of the deletion process includes deleting the secret that references the service binding being deleted.
Once all the service bindings are removed, the service instance may be deleted.
Deleting the service instance is known as deprovisioning. If a project or namespace containing service bindings and service instances is deleted, the service catalog must first request the cluster service broker to delete the associated instances and bindings.
This is expected to delay the actual deletion of the project or namespace since the service catalog must communicate with cluster service brokers and wait for them to perform their deprovisioning work. In normal circumstances, this may take several minutes or longer depending on the service.
If you delete a service binding used by a deployment, you must also remove any references to the binding secret from the deployment. Otherwise, the next rollout will fail.
A cluster service broker is a server that conforms to the OSB API specification and manages a set of one or more services. The software could be hosted within your own OpenShift Container Platform cluster or elsewhere. This allows cluster administrators to make new types of managed services using that cluster service broker available within their cluster.
A ClusterServiceBroker resource specifies connection details for a cluster service broker and the set of services and variations of those services to OpenShift Container Platform that should then be made available to users. Of special note is the authInfo section, which contains the data used to authenticate with the cluster service broker. Also synonymous with "service" in the context of the service catalog, a cluster service class is a type of managed service offered by a particular cluster service broker.
Each time a new cluster service broker resource is added to the cluster, the service catalog controller connects to the corresponding cluster service broker to obtain a list of service offerings.
A new ClusterServiceClass resource is automatically created for each. OpenShift Container Platform also has a core concept called serviceswhich are separate Kubernetes resources related to internal load balancing. A cluster service plan is represents tiers of a cluster service class.Build, deploy and manage your applications across cloud- and on-premise infrastructure. Single-tenant, high-availability Kubernetes clusters in the public cloud.
The fastest way for developers to build, host and scale applications in the public cloud. Toggle nav. Red Hat has announced the Operator Frameworkan open source toolkit designed to manage Kubernetes native applications, called Operatorsin a more effective, automated, and scalable way. The Operator Framework is a Technology Preview feature. Technology Preview features are not supported with Red Hat production service level agreements SLAsmight not be functionally complete, and Red Hat does not recommend to use them for production.
These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process. The OpenShift Container Platform web console is also updated with new management screens for cluster administrators to install Operators, as well as grant specific projects access to use the catalog of Operators available on the cluster.
For developers, a self-service experience allows provisioning and configuring instances of databases, monitoring, and big data services without having to be subject matter experts, because the Operator has that knowledge baked into it. In the screenshot, you can see the pre-loaded catalog sources of partner Operators from leading software vendors:. Couchbase offers a NoSQL database that provides a mechanism for storage and retrieval of data which is modeled in means other than the tabular relations used in relational databases.
Available on OpenShift Container Platform 3. It installs and can more effectively failover your NoSQL clusters.
Dynatrace application monitoring provides performance metrics in real time and can help detect and diagnose problems automatically. The Operator will more easily install the container-focused monitoring stack and connect it back to the Dynatrace monitoring cloud, watching custom resources and monitoring desired states constantly.
It works in conjunction with MongoDB Ops Manager, ensuring all clusters are deployed according to operational best practices.
Red Hat AMQ Streams is a massively scalable, distributed, and high performance data streaming platform based on the Apache Kafka project. It offers a distributed backbone that allows microservices and other applications to share data with extremely high throughput and extremely low latency. This Operator enables users to configure and manage the complexities of etcd using a simple declarative configuration that creates, configures, and manages etcd clusters.
To install the Technology Preview Operator Framework, you can use the included playbook with the OpenShift Container Platform openshift-ansible installer after installing your cluster.