Device Plugins that wish to leverage the Topology Manager can send back a populated
TopologyInfo struct as part of the device registration, along with the device IDs
and the health of the device. TopologyInfo is converted to TopologyHints and
used by TopologyManager to find the optimal/desired resource allocation for a Pod.
If a plugin sends an empty but non-nil instance of TopologyInfo for a resource,
devicemanager passes it on as an empty instance of TopologyHint which is
currently interpreted as "Hint Provider has no possible NUMA affinities
for resource" which further means that pods requesting that resource will fail.
To not block device resources that pass TopologyInfo{Nodes:[]*NUMANode{}} from being
used, interprete that as nil set of hints and not a []TopologyHint{}.
Signed-off-by: Mikko Ylinen <mikko.ylinen@intel.com>
cpu.cfs_period_us is measured in microseconds in the kernel but
provided in time.Duration by the user, that change clarifies the code
to make this evident to the reader.
Also, the minimum value for that feature is 1ms and not 1μs, and this
change alters the validation to reject values smaller than 1ms.
Track how long it takes for pod updates to propagate from detection
to successful change on API server. Will guide future improvements
in pod start and shutdown latency.
Metric is `kubelet_pod_status_sync_duration_seconds` and is ALPHA
stability. Histogram buckets are chosen based on distribution of
observed status delays in practice.
* Adapt https://github.com/kubernetes/kubernetes/pull/109441 but
ensures that `search .` does not get propagated into containers'
/etc/resolv.conf. There is no reason to put `.` in a container's
search field and it causes issues for musl
drop bitArray implementation and use the bitmap implementation from
k8s.io/kubernetes/pkg/registry/core/service/allocator.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
and by doing so, fix a bug where the stats providers report a directory is not found after a pod's storage is removed
Signed-off-by: Peter Hunt <pehunt@redhat.com>
cpu.cfs_period_us is 100μs by default despite having an "ms" unit
for some unfortunate reason. Documentation:
https://www.kernel.org/doc/html/latest/scheduler/sched-bwc.html#management
The desired effect of that change is to match
k8s default `CPUCFSQuotaPeriod` value (100ms before that change)
with one used in k8s without the `CustomCPUCFSQuotaPeriod` flag enabled
and Linux CFS (100us, 1000x smaller than 100ms).
github.com/opencontainers/selinux/go-selinux needs OS that supports SELinux
and SELinux enabled in it to return useful data, therefore add an interface
in front of it, so we can mock its behavior in unit tests.
