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Add a separate flags struct for Kubelet flags

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Kubelet flags are not necessarily appropriate for the KubeletConfiguration
object. For example, this PR also removes HostnameOverride and NodeIP
from KubeletConfiguration. This is a preleminary step to enabling Nodes
to share configurations, as part of the dynamic Kubelet configuration
feature (#29459). Fields that must be unique for each node inhibit
sharing, because their values, by definition, cannot be shared.
This commit is contained in:
Michael Taufen
2017-01-18 11:34:49 -08:00
parent 05c046f6d3
commit f5eed7e91d
9 changed files with 224 additions and 194 deletions
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13
pkg/apis/componentconfig/types.go
View File

@@ -120,6 +120,12 @@ const (
HairpinNone = "none"
)
// A configuration field should go in KubeletFlags instead of KubeletConfiguration if any of these are true:
// - its value will never, or cannot safely be changed during the lifetime of a node
// - its value cannot be safely shared between nodes at the same time (e.g. a hostname)
// KubeletConfiguration is intended to be shared between nodes
// In general, please try to avoid adding flags or configuration fields,
// we already have a confusingly large amount of them.
// TODO: curate the ordering and structure of this config object
type KubeletConfiguration struct {
metav1.TypeMeta
@@ -167,9 +173,6 @@ type KubeletConfiguration struct {
Authentication KubeletAuthentication
// authorization specifies how requests to the Kubelet's server are authorized
Authorization KubeletAuthorization
// hostnameOverride is the hostname used to identify the kubelet instead
// of the actual hostname.
HostnameOverride string
// podInfraContainerImage is the image whose network/ipc namespaces
// containers in each pod will use.
PodInfraContainerImage string
@@ -405,10 +408,6 @@ type KubeletConfiguration struct {
// wait before transitioning out of out-of-disk node condition status.
// +optional
OutOfDiskTransitionFrequency metav1.Duration
// nodeIP is IP address of the node. If set, kubelet will use this IP
// address for the node.
// +optional
NodeIP string
// nodeLabels to add when registering the node in the cluster.
NodeLabels map[string]string
// nonMasqueradeCIDR configures masquerading: traffic to IPs outside this range will use IP masquerade.

12
pkg/apis/componentconfig/v1alpha1/types.go
View File

@@ -175,6 +175,12 @@ type LeaderElectionConfiguration struct {
RetryPeriod metav1.Duration `json:"retryPeriod"`
}
// A configuration field should go in KubeletFlags instead of KubeletConfiguration if any of these are true:
// - its value will never, or cannot safely be changed during the lifetime of a node
// - its value cannot be safely shared between nodes at the same time (e.g. a hostname)
// KubeletConfiguration is intended to be shared between nodes
// In general, please try to avoid adding flags or configuration fields,
// we already have a confusingly large amount of them.
type KubeletConfiguration struct {
metav1.TypeMeta `json:",inline"`
@@ -221,9 +227,6 @@ type KubeletConfiguration struct {
Authentication KubeletAuthentication `json:"authentication"`
// authorization specifies how requests to the Kubelet's server are authorized
Authorization KubeletAuthorization `json:"authorization"`
// hostnameOverride is the hostname used to identify the kubelet instead
// of the actual hostname.
HostnameOverride string `json:"hostnameOverride"`
// podInfraContainerImage is the image whose network/ipc namespaces
// containers in each pod will use.
PodInfraContainerImage string `json:"podInfraContainerImage"`
@@ -449,9 +452,6 @@ type KubeletConfiguration struct {
// outOfDiskTransitionFrequency is duration for which the kubelet has to
// wait before transitioning out of out-of-disk node condition status.
OutOfDiskTransitionFrequency metav1.Duration `json:"outOfDiskTransitionFrequency"`
// nodeIP is IP address of the node. If set, kubelet will use this IP
// address for the node.
NodeIP string `json:"nodeIP"`
// nodeLabels to add when registering the node in the cluster.
NodeLabels map[string]string `json:"nodeLabels"`
// nonMasqueradeCIDR configures masquerading: traffic to IPs outside this range will use IP masquerade.

4
pkg/apis/componentconfig/v1alpha1/zz_generated.conversion.go
View File

@@ -271,7 +271,6 @@ func autoConvert_v1alpha1_KubeletConfiguration_To_componentconfig_KubeletConfigu
if err := Convert_v1alpha1_KubeletAuthorization_To_componentconfig_KubeletAuthorization(&in.Authorization, &out.Authorization, s); err != nil {
return err
}
out.HostnameOverride = in.HostnameOverride
out.PodInfraContainerImage = in.PodInfraContainerImage
out.DockerEndpoint = in.DockerEndpoint
out.RootDirectory = in.RootDirectory
@@ -377,7 +376,6 @@ func autoConvert_v1alpha1_KubeletConfiguration_To_componentconfig_KubeletConfigu
return err
}
out.OutOfDiskTransitionFrequency = in.OutOfDiskTransitionFrequency
out.NodeIP = in.NodeIP
out.NodeLabels = *(*map[string]string)(unsafe.Pointer(&in.NodeLabels))
out.NonMasqueradeCIDR = in.NonMasqueradeCIDR
out.EnableCustomMetrics = in.EnableCustomMetrics
@@ -450,7 +448,6 @@ func autoConvert_componentconfig_KubeletConfiguration_To_v1alpha1_KubeletConfigu
if err := Convert_componentconfig_KubeletAuthorization_To_v1alpha1_KubeletAuthorization(&in.Authorization, &out.Authorization, s); err != nil {
return err
}
out.HostnameOverride = in.HostnameOverride
out.PodInfraContainerImage = in.PodInfraContainerImage
out.DockerEndpoint = in.DockerEndpoint
out.RootDirectory = in.RootDirectory
@@ -576,7 +573,6 @@ func autoConvert_componentconfig_KubeletConfiguration_To_v1alpha1_KubeletConfigu
return err
}
out.OutOfDiskTransitionFrequency = in.OutOfDiskTransitionFrequency
out.NodeIP = in.NodeIP
out.NodeLabels = *(*map[string]string)(unsafe.Pointer(&in.NodeLabels))
out.NonMasqueradeCIDR = in.NonMasqueradeCIDR
out.EnableCustomMetrics = in.EnableCustomMetrics