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Node feature discovery for Kubernetes
8ad6210d5c
Sharing the same client between updater threads virtually serializes access, in practice making the effective parallelism close to 1. With this patch, in my bench cluster of 300 nodes, the time taken by updating all nodes drops from ~2 minutes to ~12 seconds (with the default parallelism of 10 node updater threads). This demonstrates the 10-fold increased parallelism from ~1 to 10. There might be other solutions that could be explored, e.g. caching nodes with an indexer/lister but otoh nfd doesn't necessarily need/want to watch every little change in each node. We only need to get the node when something in our own CRDs change (we don't react to any changes in the node object itself). Using multiple clients was the most obvious choice to solve the problem for now. |
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Node Feature Discovery
Welcome to Node Feature Discovery – a Kubernetes add-on for detecting hardware features and system configuration!
See our Documentation for detailed instructions and reference
Quick-start – the short-short version
$ kubectl apply -k https://github.com/kubernetes-sigs/node-feature-discovery/deployment/overlays/default?ref=v0.15.4
namespace/node-feature-discovery created
customresourcedefinition.apiextensions.k8s.io/nodefeaturerules.nfd.k8s-sigs.io created
customresourcedefinition.apiextensions.k8s.io/nodefeatures.nfd.k8s-sigs.io created
serviceaccount/nfd-gc created
serviceaccount/nfd-master created
serviceaccount/nfd-worker created
role.rbac.authorization.k8s.io/nfd-worker created
clusterrole.rbac.authorization.k8s.io/nfd-gc created
clusterrole.rbac.authorization.k8s.io/nfd-master created
rolebinding.rbac.authorization.k8s.io/nfd-worker created
clusterrolebinding.rbac.authorization.k8s.io/nfd-gc created
clusterrolebinding.rbac.authorization.k8s.io/nfd-master created
configmap/nfd-master-conf created
configmap/nfd-worker-conf created
deployment.apps/nfd-gc created
deployment.apps/nfd-master created
daemonset.apps/nfd-worker created
$ kubectl -n node-feature-discovery get all
NAME READY STATUS RESTARTS AGE
pod/nfd-gc-565fc85d9b-94jpj 1/1 Running 0 18s
pod/nfd-master-6796d89d7b-qccrq 1/1 Running 0 18s
pod/nfd-worker-nwdp6 1/1 Running 0 18s
...
$ kubectl get no -o json | jq '.items[].metadata.labels'
{
"kubernetes.io/arch": "amd64",
"kubernetes.io/os": "linux",
"feature.node.kubernetes.io/cpu-cpuid.ADX": "true",
"feature.node.kubernetes.io/cpu-cpuid.AESNI": "true",
...