红帽全球峰会2.3.4. Upgrading the control plane
You must manually update the control plane for minor and major releases. The community Istio project recommends canary upgrades, Red Hat OpenShift Service Mesh only supports in-place upgrades. Red Hat OpenShift Service Mesh requires that you upgrade from each minor release to the next minor release in sequence. For example, you must upgrade from version 2.0 to version 2.1, and then upgrade to version 2.2. You cannot update from Red Hat OpenShift Service Mesh 2.0 to 2.2 directly.
When you upgrade the service mesh control plane, all Operator managed resources, for example gateways, are also upgraded.
Although you can deploy multiple versions of the control plane in the same cluster, Red Hat OpenShift Service Mesh does not support canary upgrades of the service mesh. That is, you can have different SCMP resources with different values for spec.version, but they cannot be managing the same mesh.
For more information about migrating your extensions, refer to Migrating from ServiceMeshExtension to WasmPlugin resources.
2.3.4.1. Upgrade changes from version 2.5 to version 2.6
This release disables Red Hat OpenShift Distributed Tracing Platform (Jaeger) by default for new instances of the ServiceMeshControlPlane resource.
When updating existing instances of the ServiceMeshControlPlane resource to Red Hat OpenShift Service Mesh version 2.6, Distributed Tracing Platform (Jaeger) remains enabled by default.
Red Hat OpenShift Service Mesh 2.6 is the last release that includes support for Red Hat OpenShift Distributed Tracing Platform (Jaeger) and OpenShift Elasticsearch Operator. Both Distributed Tracing Platform (Jaeger) and OpenShift Elasticsearch Operator will be removed in the next release. If you are currently using Distributed Tracing Platform (Jaeger) and OpenShift Elasticsearch Operator, you must migrate to Red Hat OpenShift Distributed Tracing Platform and Red Hat build of OpenTelemetry.
To enhance pod startup times, Istio now includes a startupProbe in sidecar containers by default. The pod’s readiness probes do not start until the Envoy sidecar has started.
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