mirror of https://github.com/kubernetes/kops.git
98 lines
3.0 KiB
Go
98 lines
3.0 KiB
Go
/*
|
|
Copyright 2019 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package components
|
|
|
|
import (
|
|
"k8s.io/apimachinery/pkg/api/resource"
|
|
|
|
"k8s.io/kops/pkg/apis/kops"
|
|
"k8s.io/kops/upup/pkg/fi"
|
|
"k8s.io/kops/upup/pkg/fi/loader"
|
|
)
|
|
|
|
// KubeProxyOptionsBuilder adds options for kube-proxy to the model
|
|
type KubeProxyOptionsBuilder struct {
|
|
Context *OptionsContext
|
|
}
|
|
|
|
var _ loader.OptionsBuilder = &KubeProxyOptionsBuilder{}
|
|
|
|
func (b *KubeProxyOptionsBuilder) BuildOptions(o interface{}) error {
|
|
clusterSpec := o.(*kops.ClusterSpec)
|
|
if clusterSpec.KubeProxy == nil {
|
|
clusterSpec.KubeProxy = &kops.KubeProxyConfig{}
|
|
}
|
|
|
|
config := clusterSpec.KubeProxy
|
|
|
|
if config.LogLevel == 0 {
|
|
// TODO: No way to set to 0?
|
|
config.LogLevel = 2
|
|
}
|
|
|
|
// Any change here should be accompanied by a proportional change in CPU
|
|
// requests of other per-node add-ons (e.g. fluentd).
|
|
if config.CPURequest == nil {
|
|
config.CPURequest = resource.NewScaledQuantity(100, resource.Milli)
|
|
}
|
|
|
|
image, err := Image("kube-proxy", clusterSpec, b.Context.AssetBuilder)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
config.Image = image
|
|
|
|
// We set the master URL during node configuration, because if we use the internal dns name,
|
|
// then we get a circular dependency:
|
|
// * kube-proxy uses DNS for resolution
|
|
// * dns is set up by dns-controller
|
|
// * dns-controller talks to the API using the kube-proxy configured kubernetes service
|
|
|
|
if config.ClusterCIDR == nil {
|
|
if b.needsClusterCIDR(clusterSpec) {
|
|
config.ClusterCIDR = fi.String(clusterSpec.KubeControllerManager.ClusterCIDR)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (*KubeProxyOptionsBuilder) needsClusterCIDR(clusterSpec *kops.ClusterSpec) bool {
|
|
// If we use podCIDR from cloud, we should not set cluster cidr.
|
|
if clusterSpec.IsKopsControllerIPAM() {
|
|
return false
|
|
}
|
|
|
|
// If we're using the AmazonVPC networking, we should omit the ClusterCIDR
|
|
// because pod IPs are real, routable IPs in the VPC, and they are not in a specific
|
|
// CIDR range that allows us to distinguish them from other IPs. Omitting the ClusterCIDR
|
|
// causes kube-proxy never to SNAT when proxying clusterIPs, which is the behavior
|
|
// we want for pods.
|
|
// If we're not using the AmazonVPC networking, and the KubeControllerMananger has
|
|
// a ClusterCIDR, use that because most networking plug ins draw pod IPs from this range.
|
|
if clusterSpec.Networking.AmazonVPC != nil {
|
|
return false
|
|
}
|
|
|
|
// If KCM doesn't have a ClusterCIDR, KubeProxy should not either.
|
|
if clusterSpec.KubeControllerManager == nil || clusterSpec.KubeControllerManager.ClusterCIDR == "" {
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|