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smtalign: add cpu-manager-policy-options flag in Kubelet

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In this patch we enhance the kubelet configuration to support
cpuManagerPolicyOptions.

In order to introduce SMT-awareness in CPU Manager, we introduce a
new flag in Kubelet to allow the user to specify an additional flag
called `cpumanager-policy-options` to allow the user to modify the
behaviour of static policy to strictly guarantee allocation of whole
core.

Co-authored-by: Francesco Romani <fromani@redhat.com>
Signed-off-by: Swati Sehgal <swsehgal@redhat.com>
This commit is contained in:
Swati Sehgal
2021-04-26 20:24:30 +01:00
committed by Francesco Romani
parent 4d78db54a5
commit cc76a756e4
5 changed files with 15 additions and 0 deletions
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1
cmd/kubelet/app/options/options.go
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@@ -492,6 +492,7 @@ func AddKubeletConfigFlags(mainfs *pflag.FlagSet, c *kubeletconfig.KubeletConfig
fs.StringVar(&c.CgroupDriver, "cgroup-driver", c.CgroupDriver, "Driver that the kubelet uses to manipulate cgroups on the host. Possible values: 'cgroupfs', 'systemd'")
fs.StringVar(&c.CgroupRoot, "cgroup-root", c.CgroupRoot, "Optional root cgroup to use for pods. This is handled by the container runtime on a best effort basis. Default: '', which means use the container runtime default.")
fs.StringVar(&c.CPUManagerPolicy, "cpu-manager-policy", c.CPUManagerPolicy, "CPU Manager policy to use. Possible values: 'none', 'static'.")
fs.Var(cliflag.NewMapStringStringNoSplit(&c.CPUManagerPolicyOptions), "cpu-manager-policy-options", "A set of key=value CPU Manager policy options to use, to fine tune their behaviour. If not supplied, keep the default behaviour.")
fs.DurationVar(&c.CPUManagerReconcilePeriod.Duration, "cpu-manager-reconcile-period", c.CPUManagerReconcilePeriod.Duration, "<Warning: Alpha feature> CPU Manager reconciliation period. Examples: '10s', or '1m'. If not supplied, defaults to 'NodeStatusUpdateFrequency'")
fs.Var(cliflag.NewMapStringString(&c.QOSReserved), "qos-reserved", "<Warning: Alpha feature> A set of ResourceName=Percentage (e.g. memory=50%) pairs that describe how pod resource requests are reserved at the QoS level. Currently only memory is supported. Requires the QOSReserved feature gate to be enabled.")
fs.StringVar(&c.TopologyManagerPolicy, "topology-manager-policy", c.TopologyManagerPolicy, "Topology Manager policy to use. Possible values: 'none', 'best-effort', 'restricted', 'single-numa-node'.")