mirror of
https://github.com/k3s-io/kubernetes.git
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175 lines
7.9 KiB
Go
175 lines
7.9 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package app
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import (
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// This file exists to force the desired plugin implementations to be linked.
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// This should probably be part of some configuration fed into the build for a
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// given binary target.
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"fmt"
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// Cloud providers
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"k8s.io/kubernetes/pkg/apis/componentconfig"
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_ "k8s.io/kubernetes/pkg/cloudprovider/providers"
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// Volume plugins
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"github.com/golang/glog"
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"k8s.io/kubernetes/pkg/cloudprovider"
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"k8s.io/kubernetes/pkg/cloudprovider/providers/aws"
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"k8s.io/kubernetes/pkg/cloudprovider/providers/gce"
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"k8s.io/kubernetes/pkg/cloudprovider/providers/openstack"
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"k8s.io/kubernetes/pkg/cloudprovider/providers/vsphere"
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utilconfig "k8s.io/kubernetes/pkg/util/config"
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"k8s.io/kubernetes/pkg/util/io"
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"k8s.io/kubernetes/pkg/volume"
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"k8s.io/kubernetes/pkg/volume/aws_ebs"
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"k8s.io/kubernetes/pkg/volume/azure_dd"
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"k8s.io/kubernetes/pkg/volume/cinder"
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"k8s.io/kubernetes/pkg/volume/flexvolume"
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"k8s.io/kubernetes/pkg/volume/gce_pd"
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"k8s.io/kubernetes/pkg/volume/glusterfs"
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"k8s.io/kubernetes/pkg/volume/host_path"
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"k8s.io/kubernetes/pkg/volume/nfs"
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"k8s.io/kubernetes/pkg/volume/quobyte"
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"k8s.io/kubernetes/pkg/volume/rbd"
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"k8s.io/kubernetes/pkg/volume/vsphere_volume"
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)
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// ProbeAttachableVolumePlugins collects all volume plugins for the attach/
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// detach controller. VolumeConfiguration is used ot get FlexVolumePluginDir
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// which specifies the directory to search for additional third party volume
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// plugins.
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// The list of plugins is manually compiled. This code and the plugin
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// initialization code for kubelet really, really need a through refactor.
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func ProbeAttachableVolumePlugins(config componentconfig.VolumeConfiguration) []volume.VolumePlugin {
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allPlugins := []volume.VolumePlugin{}
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allPlugins = append(allPlugins, aws_ebs.ProbeVolumePlugins()...)
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allPlugins = append(allPlugins, gce_pd.ProbeVolumePlugins()...)
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allPlugins = append(allPlugins, cinder.ProbeVolumePlugins()...)
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allPlugins = append(allPlugins, flexvolume.ProbeVolumePlugins(config.FlexVolumePluginDir)...)
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allPlugins = append(allPlugins, vsphere_volume.ProbeVolumePlugins()...)
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allPlugins = append(allPlugins, azure_dd.ProbeVolumePlugins()...)
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return allPlugins
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}
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// ProbeControllerVolumePlugins collects all persistent volume plugins into an
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// easy to use list. Only volume plugins that implement any of
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// provisioner/recycler/deleter interface should be returned.
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func ProbeControllerVolumePlugins(cloud cloudprovider.Interface, config componentconfig.VolumeConfiguration) []volume.VolumePlugin {
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allPlugins := []volume.VolumePlugin{}
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// The list of plugins to probe is decided by this binary, not
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// by dynamic linking or other "magic". Plugins will be analyzed and
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// initialized later.
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// Each plugin can make use of VolumeConfig. The single arg to this func contains *all* enumerated
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// options meant to configure volume plugins. From that single config, create an instance of volume.VolumeConfig
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// for a specific plugin and pass that instance to the plugin's ProbeVolumePlugins(config) func.
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// HostPath recycling is for testing and development purposes only!
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hostPathConfig := volume.VolumeConfig{
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RecyclerMinimumTimeout: int(config.PersistentVolumeRecyclerConfiguration.MinimumTimeoutHostPath),
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RecyclerTimeoutIncrement: int(config.PersistentVolumeRecyclerConfiguration.IncrementTimeoutHostPath),
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RecyclerPodTemplate: volume.NewPersistentVolumeRecyclerPodTemplate(),
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ProvisioningEnabled: config.EnableHostPathProvisioning,
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}
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if err := AttemptToLoadRecycler(config.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathHostPath, &hostPathConfig); err != nil {
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glog.Fatalf("Could not create hostpath recycler pod from file %s: %+v", config.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathHostPath, err)
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}
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allPlugins = append(allPlugins, host_path.ProbeVolumePlugins(hostPathConfig)...)
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nfsConfig := volume.VolumeConfig{
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RecyclerMinimumTimeout: int(config.PersistentVolumeRecyclerConfiguration.MinimumTimeoutNFS),
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RecyclerTimeoutIncrement: int(config.PersistentVolumeRecyclerConfiguration.IncrementTimeoutNFS),
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RecyclerPodTemplate: volume.NewPersistentVolumeRecyclerPodTemplate(),
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}
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if err := AttemptToLoadRecycler(config.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathNFS, &nfsConfig); err != nil {
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glog.Fatalf("Could not create NFS recycler pod from file %s: %+v", config.PersistentVolumeRecyclerConfiguration.PodTemplateFilePathNFS, err)
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}
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allPlugins = append(allPlugins, nfs.ProbeVolumePlugins(nfsConfig)...)
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allPlugins = append(allPlugins, glusterfs.ProbeVolumePlugins()...)
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// add rbd provisioner
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allPlugins = append(allPlugins, rbd.ProbeVolumePlugins()...)
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allPlugins = append(allPlugins, quobyte.ProbeVolumePlugins()...)
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if cloud != nil {
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switch {
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case aws.ProviderName == cloud.ProviderName():
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allPlugins = append(allPlugins, aws_ebs.ProbeVolumePlugins()...)
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case gce.ProviderName == cloud.ProviderName():
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allPlugins = append(allPlugins, gce_pd.ProbeVolumePlugins()...)
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case openstack.ProviderName == cloud.ProviderName():
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allPlugins = append(allPlugins, cinder.ProbeVolumePlugins()...)
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case vsphere.ProviderName == cloud.ProviderName():
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allPlugins = append(allPlugins, vsphere_volume.ProbeVolumePlugins()...)
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}
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}
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return allPlugins
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}
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// NewAlphaVolumeProvisioner returns a volume provisioner to use when running in
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// a cloud or development environment. The alpha implementation of provisioning
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// allows 1 implied provisioner per cloud and is here only for compatibility
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// with Kubernetes 1.3
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// TODO: remove in Kubernetes 1.5
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func NewAlphaVolumeProvisioner(cloud cloudprovider.Interface, config componentconfig.VolumeConfiguration) (volume.ProvisionableVolumePlugin, error) {
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switch {
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case !utilconfig.DefaultFeatureGate.DynamicVolumeProvisioning():
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return nil, nil
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case cloud == nil && config.EnableHostPathProvisioning:
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return getProvisionablePluginFromVolumePlugins(host_path.ProbeVolumePlugins(
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volume.VolumeConfig{
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ProvisioningEnabled: true,
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}))
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case cloud != nil && aws.ProviderName == cloud.ProviderName():
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return getProvisionablePluginFromVolumePlugins(aws_ebs.ProbeVolumePlugins())
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case cloud != nil && gce.ProviderName == cloud.ProviderName():
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return getProvisionablePluginFromVolumePlugins(gce_pd.ProbeVolumePlugins())
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case cloud != nil && openstack.ProviderName == cloud.ProviderName():
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return getProvisionablePluginFromVolumePlugins(cinder.ProbeVolumePlugins())
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case cloud != nil && vsphere.ProviderName == cloud.ProviderName():
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return getProvisionablePluginFromVolumePlugins(vsphere_volume.ProbeVolumePlugins())
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}
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return nil, nil
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}
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func getProvisionablePluginFromVolumePlugins(plugins []volume.VolumePlugin) (volume.ProvisionableVolumePlugin, error) {
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for _, plugin := range plugins {
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if provisonablePlugin, ok := plugin.(volume.ProvisionableVolumePlugin); ok {
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return provisonablePlugin, nil
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}
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}
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return nil, fmt.Errorf("ProvisionablePlugin expected but not found in %#v: ", plugins)
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}
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// AttemptToLoadRecycler tries decoding a pod from a filepath for use as a recycler for a volume.
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// If successful, this method will set the recycler on the config.
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// If unsuccessful, an error is returned. Function is exported for reuse downstream.
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func AttemptToLoadRecycler(path string, config *volume.VolumeConfig) error {
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if path != "" {
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recyclerPod, err := io.LoadPodFromFile(path)
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if err != nil {
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return err
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}
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config.RecyclerPodTemplate = recyclerPod
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}
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return nil
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}
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