Red Hat Summit2.5. Service mesh deployment models
Red Hat OpenShift Service Mesh supports several different deployment models that can be combined in different ways to best suit your business requirements.
In Istio, a tenant is a group of users that share common access and privileges for a set of deployed workloads. You can use tenants to provide a level of isolation between different teams. You can segregate access to different tenants using NetworkPolicies, AuthorizationPolicies, and exportTo annotations on istio.io or service resources.
2.5.1. Cluster-Wide (Single Tenant) mesh deployment model
A cluster-wide deployment contains a Service Mesh Control Plane that monitors resources for an entire cluster. Monitoring resources for an entire cluster closely resembles Istio functionality in that the control plane uses a single query across all namespaces to monitor Istio and Kubernetes resources. As a result, cluster-wide deployments decrease the number of requests sent to the API server.
Similar to Istio, a cluster-wide mesh includes namespaces with the istio-injection=enabled namespace label by default. You can change this label by modifying the spec.memberSelectors field of the ServiceMeshMemberRoll resource.
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