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Create volumeMount and hostPath for cloud config file

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We have a way to specify the cloudProvider in kubeadm.conf. We also
add `--cloud-config /etc/kubernetes/cloud-config` to both the
kubernetes api server and controller manager yaml files if one exists
on the box. However we fail to make that file available to the
process running in the container. We need to make this `cloud-config`
file available to both processes similar to how controller-manager.conf
is passed to controller manager.
This commit is contained in:
Davanum Srinivas 2017-11-28 21:31:28 -05:00
parent 2aeace402a
commit a11f984356
2 changed files with 11 additions and 1 deletions
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8
cmd/kubeadm/app/phases/controlplane/volumes.go
View File

@ -34,6 +34,7 @@ const (
caCertsVolumePath = "/etc/ssl/certs"
caCertsPkiVolumeName = "ca-certs-etc-pki"
flexvolumeDirVolumeName = "flexvolume-dir"
cloudConfigVolumeName = "cloud-config"
flexvolumeDirVolumePath = "/usr/libexec/kubernetes/kubelet-plugins/volume/exec"
)
@ -70,6 +71,13 @@ func getHostPathVolumesForTheControlPlane(cfg *kubeadmapi.MasterConfiguration) c
// Read-only mount for the controller manager kubeconfig file
controllerManagerKubeConfigFile := filepath.Join(kubeadmconstants.KubernetesDir, kubeadmconstants.ControllerManagerKubeConfigFileName)
mounts.NewHostPathMount(kubeadmconstants.KubeControllerManager, kubeadmconstants.KubeConfigVolumeName, controllerManagerKubeConfigFile, controllerManagerKubeConfigFile, true, &hostPathFileOrCreate)
// Read-only mount of the cloud config file if present
if cfg.CloudProvider != "" {
if _, err := os.Stat(DefaultCloudConfigPath); err == nil {
mounts.NewHostPathMount(kubeadmconstants.KubeAPIServer, cloudConfigVolumeName, DefaultCloudConfigPath, DefaultCloudConfigPath, true, &hostPathFileOrCreate)
mounts.NewHostPathMount(kubeadmconstants.KubeControllerManager, cloudConfigVolumeName, DefaultCloudConfigPath, DefaultCloudConfigPath, true, &hostPathFileOrCreate)
}
}
// Mount for the flexvolume directory (/usr/libexec/kubernetes/kubelet-plugins/volume/exec) directory
// Flexvolume dir must NOT be readonly as it is used for third-party plugins to integrate with their storage backends via unix domain socket.
if stat, err := os.Stat(flexvolumeDirVolumePath); err == nil && stat.IsDir() {

4
cmd/kubeadm/app/phases/controlplane/volumes_test.go
View File

@ -521,7 +521,9 @@ func TestGetHostPathVolumesForTheControlPlane(t *testing.T) {
if _, ok := mounts.volumeMounts[kubeadmconstants.KubeControllerManager][flexvolumeDirVolumeName]; ok {
delete(mounts.volumeMounts[kubeadmconstants.KubeControllerManager], flexvolumeDirVolumeName)
}
if _, ok := mounts.volumeMounts[kubeadmconstants.KubeControllerManager][cloudConfigVolumeName]; ok {
delete(mounts.volumeMounts[kubeadmconstants.KubeControllerManager], cloudConfigVolumeName)
}
if !reflect.DeepEqual(mounts.volumes, rt.vol) {
t.Errorf(
"failed getHostPathVolumesForTheControlPlane:\n\texpected: %v\n\t actual: %v",