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fix #51135 make CFS quota period configurable, adds a cli flag and config option to kubelet to be able to set cpu.cfs_period and defaults to 100ms as before.

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It requires to enable feature gate CustomCPUCFSQuotaPeriod.

Signed-off-by: Sandor Szücs <sandor.szuecs@zalando.de>
This commit is contained in:
Sandor Szücs
2018-05-04 17:25:22 +02:00
parent 380931aca7
commit 588d2808b7
32 changed files with 627 additions and 32 deletions
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1
cmd/kubelet/app/options/options.go
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@@ -530,6 +530,7 @@ func AddKubeletConfigFlags(mainfs *pflag.FlagSet, c *kubeletconfig.KubeletConfig
fs.StringVar(&c.ResolverConfig, "resolv-conf", c.ResolverConfig, "Resolver configuration file used as the basis for the container DNS resolution configuration.")
fs.BoolVar(&c.CPUCFSQuota, "cpu-cfs-quota", c.CPUCFSQuota, "Enable CPU CFS quota enforcement for containers that specify CPU limits")
fs.DurationVar(&c.CPUCFSQuotaPeriod.Duration, "cpu-cfs-quota-period", c.CPUCFSQuotaPeriod.Duration, "Sets CPU CFS quota period value, cpu.cfs_period_us, defaults to Linux Kernel default")
fs.BoolVar(&c.EnableControllerAttachDetach, "enable-controller-attach-detach", c.EnableControllerAttachDetach, "Enables the Attach/Detach controller to manage attachment/detachment of volumes scheduled to this node, and disables kubelet from executing any attach/detach operations")
fs.BoolVar(&c.MakeIPTablesUtilChains, "make-iptables-util-chains", c.MakeIPTablesUtilChains, "If true, kubelet will ensure iptables utility rules are present on host.")
fs.Int32Var(&c.IPTablesMasqueradeBit, "iptables-masquerade-bit", c.IPTablesMasqueradeBit, "The bit of the fwmark space to mark packets for SNAT. Must be within the range [0, 31]. Please match this parameter with corresponding parameter in kube-proxy.")

1
cmd/kubelet/app/server.go
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@@ -708,6 +708,7 @@ func run(s *options.KubeletServer, kubeDeps *kubelet.Dependencies, stopCh <-chan
ExperimentalCPUManagerReconcilePeriod: s.CPUManagerReconcilePeriod.Duration,
ExperimentalPodPidsLimit: s.PodPidsLimit,
EnforceCPULimits: s.CPUCFSQuota,
CPUCFSQuotaPeriod: s.CPUCFSQuotaPeriod.Duration,
},
s.FailSwapOn,
devicePluginEnabled,