![]() OpenShift provides security context constraints (SCC) that control the actions that a pod can perform and what it has the ability to access. It is available as an add-on for OpenShift or as a standalone component. Redhat Quay container and application registry provides secure storage, distribution, and deployment of containers on any infrastructure. Also you have built-in CI/CD tools to create your pipelines and workflows. Using Source to Image (S2I) technology, you can deploy an application from your source code without telling about the container details OpenShift will detect the source code language, then choose a builder image to build the container image and then deploy the application using the created container image. Eg: there are pre-created templates available in OpenShift and you can use those for spinning up an application very quickly. On the other hand, OpeShift has inbuilt features and tools to support end to end application deployment and lifecycle management. Most of these operations are manual in Kubernetes or you need to deploy and integrate additional tools for such automated tasks. We need to build the container images, integrate with testing workflows, deploy to dev or production, then monitor and feedback the application lifecycle. We all know that we will have complex workflows to deploy containerized applications in Kubernetes platforms. This creates difficulty for the users to work with the inflexible templates of the former. But Helm cannot find support on OpenShift. The Automation Broker or Service Catalog available on the OpenShift can be easily installed on Kubernetes. ![]() The usage of state-of-the-art templates and packages in the Helm chart is hard to deploy on OpenShift. In terms of flexibility, Helm Charts of Kubernetes are more flexible than the templates of OpenShift. Though deploying the Kubernetes requires some special skills and efforts, it is made possible with the latest cloud computing. Kubernetes doesn’t demand any specific requirements in terms of the operating system. The installation of OpenShift is also possible in CentOS as well as Fedora. But the installation of OpenShift has its limits Red Hat Enterprise Linux Atomic Host (RHELAH) and Red Hat Enterprise Linux (RHEL). Users can find better flexibility of the Operating System with the Kubernetes. The running environment of Kubernetes and OpenShift differs. OpenShift Route has more capabilities as it can cover additional scenarios such as TLS re-encryption for improved security, TLS passthrough for improved security, Multiple weighted backends (split traffic), Generated pattern-based hostnames and Wildcard domains. It’s worth mentioning that although OpenShift provides this HAProxy-based built-in load-balancer, it has a pluggable architecture that allows admins to replace it with NGINX (and NGINX Plus) or external load-balancers like F5 BIG-IP. When a Route object is created on OpenShift, it gets picked up by the built-in HAProxy load balancer in order to expose the requested service and make it externally available with the given configuration. On the OpenShift side, it is possible to use Routes for this purpose. In order to allow accessing your pod and services from outsides, Kubernetes can use the Ingress object in Kubernetes to signal the Kubernetes platform that a certain service needs to be accessible to the outside world and it contains the configuration needed such as an externally-reachable URL, SSL, and more. ![]() Although pods and services have their own IP addresses on Kubernetes, these IP addresses are only reachable within the Kubernetes cluster and not accessible to the outside clients.
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