Bump the required Kubernetes version to v1.24. In practice this is the
minimum Kubernetes version as our deployment (both kustomize and Helm)
depend on the gRPC container probes feature of Kubernetes.
The "combined" overlay, deploying nfd-master and nfd-worker in the same
pod (with a daemonset) doesn't make sense anymore as we have enabled
NodeFeature API. There is no direct communication between nfd-master and
nfd-worker anymore, Moreover, the combined deployment can be seen as
broken as there is one NodeFeature controller (i.e. nfd-master) on each
node, causing them to race against each other, all processing all
NodeFeature objects.
Expose metrics via prometheus.monitoring.coreos.com/v1
The exposed metrics are
| Metric | Type | Meaning |
| --------------- | ---------------- | ---------------- |
| `nfd_master_build_info` | Gauge | Version from which nfd-master was built. |
| `nfd_worker_build_info` | Gauge | Version from which nfd-worker was built. |
| `nfd_updated_nodes` | Counter | Time taken to label a node |
| `nfd_crd_processing_time` | Gauge | Time taken to process a NodeFeatureRule CRD |
| `nfd_feature_discovery_duration_seconds` | HistogramVec | Time taken to discover features on a node |
Signed-off-by: Carlos Eduardo Arango Gutierrez <eduardoa@nvidia.com>
Co-authored-by: Markus Lehtonen <markus.lehtonen@intel.com>
Commit bfbc47f55e added a lot of those and
this patch tries to cover all that we missed there. Having .md suffixes
in references to internal files makes it convenient to browse the
document locally, just as text files as the references work correctly.
Drop the gRPC communication to nfd-master and connect to the Kubernetes
API server directly when updating NodeResourceTopology objects.
Topology-updater already has connection to the API server for listing
Pods so this is not that dramatic change. It also simplifies the code
a lot as there is no need for the NFD gRPC client and no need for
managing TLS certs/keys.
This change aligns nfd-topology-updater with the future direction of
nfd-worker where the gRPC API is being dropped and replaced by a
CRD-based API.
This patch also update deployment files and documentation to reflect
this change.
Introduce two main sections "Deployment" and "Usage" and move "Developer
guide" to the top level, too. In particular, split the huge
deployment-and-usage file into multiple parts under the new main
sections. Move customization guide from "Advanced" to "Usage".
This patch also renames "Advanced" to "Reference" as only that is left
there is reference documentation.
