Thanks to Operators the deployment and lifecycle management (ie. If you remember from Part I, OpenShift Service Mesh comprehends multiple pieces, including ISITO, Jaeger, Kiali, Prometheus and Grafana. In this article, we’ll use the Web Console, but if you want to review some CLI tips&tricks I would recommend you take a look at the “Security Zones in OpenShift worker nodes” blog series. You have two different ways to install OpenShift Service Mesh: using the Web Console or using the CLI. How do I install Service Mesh in OpenShift? It also does not support to include external elements (ie. Not supported features (OpenShift 4.5): OpenShift Service Mesh does not support QUIC-based services and the usage of Secret Discovery Service (SDS) functionality.The usage of this CNI plug-in has also implications when secondary interfaces with Multus are configured as we will see in the “Data Plane” section of this blog series. The CNI plug-in replaces the init-container network configuration eliminating the need to grant service accounts and projects access to Security Context Constraints (SCCs) with elevated privileges. Network configuration: Red Hat OpenShift Service Mesh includes CNI plug-in, which provides you with an alternate way to configure application pod networking.SSL libraries: OpenShift Service Mesh replaces BoringSSL with OpenSSL.Istio RBAC: OpenShift Service Mesh provides all upstream RBAC possibility but also extends the ability to match request headers by using a regular expression, we will see it when start playing with OpenShift Service Mesh features.That makes it possible to fine select which services will be included in the Mesh. Sidecar injection: Upstream Istio default installation automatically injects the sidecar into pods within the projects you have labeled, but OpenShift Service Mesh requires you to specify an annotation.In contrast, when you deploy Service Mesh in OpenShift, you will get by default a multitenant setup of ISTIO as we’ll see below. Multitenancy: Upstream ISTIO deployments are, by default, not multitenant, although you can deploy it following some steps to gain some soft-multitenancy.This is the mode that OpenShift uses to deploy Service Mesh too, but in ISTIO upstream you use the istioctl client and in OpenShift you will be using the Operator Lifecycle Manager and Operator Hub to install and manage the operator. Installation: Upstream ISTIO has multiple ways of being installed, one of them is the Operator based installation which simplify the lifecycle management of the ISTIO deployment.Well there are differences in some aspects if you compare OpenShift Service Mesh with default ISTIO upstream deployment ( here you find more details): Now you might be wondering if there is any customization that makes different either the installation or the usage. In part I of this series of articles you have seen how OpenShift Service Mesh is using upstream ISTIO project as the main component. Is OpenShift Service Mesh installation and usage different from upstream ISTIO?
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