mirror of
https://github.com/siderolabs/talos.git
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d2fd7c2170
The gist is that `kubelet` service code only manages the container lifecycle, while `kubelet` configuration is managed now in the controllers and resources. New resources: * `secrets.Kubelet` contains Kubelet PKI derived directly from the machine configuration * `k8s.KubeletConfig` contains Kubelet non-secret config derived directly from the machine configuration * `k8s.NodeIPConfig` contains configuration on picking up Node IP for the kubelet (from machine configuration) * `k8s.NodeIP` contains actual Node IPs picked from the node addresses based on `NodeIPConfig` * `k8s.KubeletSpec` contains final `kubelet` container configuration, including merged arguments, KubeletConfig, etc. It is derived from `KubeletConfig`, `Nodename` and `NodeIP`. Final controller `KubeletServiceController` writes down configuration and PKI to disk, and manages restart/start of the `kubelet` service which is a pure wrapper around container lifecycle. Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
109 lines
3.1 KiB
Go
109 lines
3.1 KiB
Go
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package k8s
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import (
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"context"
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"fmt"
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"net"
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"github.com/AlekSi/pointer"
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"github.com/cosi-project/runtime/pkg/controller"
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"github.com/cosi-project/runtime/pkg/resource"
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"github.com/cosi-project/runtime/pkg/state"
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"go.uber.org/zap"
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"github.com/talos-systems/talos/pkg/machinery/resources/config"
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"github.com/talos-systems/talos/pkg/machinery/resources/k8s"
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)
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// KubeletConfigController renders manifests based on templates and config/secrets.
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type KubeletConfigController struct{}
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// Name implements controller.Controller interface.
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func (ctrl *KubeletConfigController) Name() string {
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return "k8s.KubeletConfigController"
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}
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// Inputs implements controller.Controller interface.
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func (ctrl *KubeletConfigController) Inputs() []controller.Input {
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return []controller.Input{
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{
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Namespace: config.NamespaceName,
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Type: config.MachineConfigType,
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ID: pointer.ToString(config.V1Alpha1ID),
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Kind: controller.InputWeak,
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},
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}
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}
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// Outputs implements controller.Controller interface.
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func (ctrl *KubeletConfigController) Outputs() []controller.Output {
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return []controller.Output{
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{
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Type: k8s.KubeletConfigType,
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Kind: controller.OutputExclusive,
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},
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}
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}
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// Run implements controller.Controller interface.
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func (ctrl *KubeletConfigController) Run(ctx context.Context, r controller.Runtime, logger *zap.Logger) error {
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for {
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select {
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case <-ctx.Done():
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return nil
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case <-r.EventCh():
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}
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cfg, err := r.Get(ctx, resource.NewMetadata(config.NamespaceName, config.MachineConfigType, config.V1Alpha1ID, resource.VersionUndefined))
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if err != nil {
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if state.IsNotFoundError(err) {
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continue
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}
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return fmt.Errorf("error getting config: %w", err)
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}
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cfgProvider := cfg.(*config.MachineConfig).Config()
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if err = r.Modify(
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ctx,
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k8s.NewKubeletConfig(k8s.NamespaceName, k8s.KubeletID),
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func(r resource.Resource) error {
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kubeletConfig := r.(*k8s.KubeletConfig).TypedSpec()
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kubeletConfig.Image = cfgProvider.Machine().Kubelet().Image()
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kubeletConfig.ClusterDNS = cfgProvider.Machine().Kubelet().ClusterDNS()
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if len(kubeletConfig.ClusterDNS) == 0 {
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var addrs []net.IP
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addrs, err = cfgProvider.Cluster().Network().DNSServiceIPs()
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if err != nil {
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return fmt.Errorf("error building DNS service IPs: %w", err)
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}
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kubeletConfig.ClusterDNS = make([]string, 0, len(addrs))
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for _, addr := range addrs {
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kubeletConfig.ClusterDNS = append(kubeletConfig.ClusterDNS, addr.String())
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}
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}
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kubeletConfig.ClusterDomain = cfgProvider.Cluster().Network().DNSDomain()
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kubeletConfig.ExtraArgs = cfgProvider.Machine().Kubelet().ExtraArgs()
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kubeletConfig.ExtraMounts = cfgProvider.Machine().Kubelet().ExtraMounts()
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kubeletConfig.CloudProviderExternal = cfgProvider.Cluster().ExternalCloudProvider().Enabled()
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return nil
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},
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); err != nil {
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return fmt.Errorf("error modifying KubeletConfig resource: %w", err)
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}
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}
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}
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