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Fix serialization of EnforceNodeAllocatable

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EnforceNodeAllocatable being `nil` and `[]` are treated in different
ways by kubelet. Namely, `nil` is replaced with `[]string{"pods"}` by
the defaulting mechanism.

E.g. if you run kubelet in Docker-in-Docker environment
you may need to run it with the following options:
`--cgroups-per-qos=false --enforce-node-allocatable=`
(this corresponds to EnforceNodeAllocatable being empty array and not
null) If you then grab kubelet configuration via /configz and try to
reuse it for dynamic kubelet config, kubelet will think that
EnforceNodeAllocatable is null, failing to run in the
Docker-in-Docker environment.

Encountered this while updating Virtlet for Kubernetes 1.6
(the dev environment is based on kubeadm-dind-cluster)
This commit is contained in:
Ivan Shvedunov 2017-04-18 14:39:46 +03:00
parent ff3a847d08
commit ef85747e14
2 changed files with 6 additions and 2 deletions
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2
pkg/apis/componentconfig/v1alpha1/types.go
View File

@ -601,7 +601,7 @@ type KubeletConfiguration struct {
// This flag specifies the various Node Allocatable enforcements that Kubelet needs to perform.
// This flag accepts a list of options. Acceptible options are `pods`, `system-reserved` & `kube-reserved`.
// Refer to [Node Allocatable](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/node-allocatable.md) doc for more information.
EnforceNodeAllocatable []string `json:"enforceNodeAllocatable,omitempty"`
EnforceNodeAllocatable []string `json:"enforceNodeAllocatable"`
// This flag, if set, will avoid including `EvictionHard` limits while computing Node Allocatable.
// Refer to [Node Allocatable](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/node-allocatable.md) doc for more information.
ExperimentalNodeAllocatableIgnoreEvictionThreshold bool `json:"experimentalNodeAllocatableIgnoreEvictionThreshold,omitempty"`

6
pkg/apis/componentconfig/v1alpha1/zz_generated.conversion.go
View File

@ -729,7 +729,11 @@ func autoConvert_componentconfig_KubeletConfiguration_To_v1alpha1_KubeletConfigu
out.KubeReserved = *(*map[string]string)(unsafe.Pointer(&in.KubeReserved))
out.SystemReservedCgroup = in.SystemReservedCgroup
out.KubeReservedCgroup = in.KubeReservedCgroup
out.EnforceNodeAllocatable = *(*[]string)(unsafe.Pointer(&in.EnforceNodeAllocatable))
if in.EnforceNodeAllocatable == nil {
out.EnforceNodeAllocatable = make([]string, 0)
} else {
out.EnforceNodeAllocatable = *(*[]string)(unsafe.Pointer(&in.EnforceNodeAllocatable))
}
out.ExperimentalNodeAllocatableIgnoreEvictionThreshold = in.ExperimentalNodeAllocatableIgnoreEvictionThreshold
return nil
}