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update kubeadm to use hostpath type

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This commit is contained in:
Di Xu 2017-08-24 21:11:52 +08:00
parent 7c72594c85
commit 01e4b960d8
7 changed files with 136 additions and 38 deletions
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25
cmd/kubeadm/app/phases/controlplane/volumes.go
View File

@ -42,14 +42,16 @@ var caCertsPkiVolumePath = "/etc/pki"
// getHostPathVolumesForTheControlPlane gets the required hostPath volumes and mounts for the control plane
func getHostPathVolumesForTheControlPlane(cfg *kubeadmapi.MasterConfiguration) controlPlaneHostPathMounts {
hostPathDirectoryOrCreate := v1.HostPathDirectoryOrCreate
hostPathFileOrCreate := v1.HostPathFileOrCreate
mounts := newControlPlaneHostPathMounts()
// HostPath volumes for the API Server
// Read-only mount for the certificates directory
// TODO: Always mount the K8s Certificates directory to a static path inside of the container
mounts.NewHostPathMount(kubeadmconstants.KubeAPIServer, kubeadmconstants.KubeCertificatesVolumeName, cfg.CertificatesDir, cfg.CertificatesDir, true)
mounts.NewHostPathMount(kubeadmconstants.KubeAPIServer, kubeadmconstants.KubeCertificatesVolumeName, cfg.CertificatesDir, cfg.CertificatesDir, true, &hostPathDirectoryOrCreate)
// Read-only mount for the ca certs (/etc/ssl/certs) directory
mounts.NewHostPathMount(kubeadmconstants.KubeAPIServer, caCertsVolumeName, caCertsVolumePath, caCertsVolumePath, true)
mounts.NewHostPathMount(kubeadmconstants.KubeAPIServer, caCertsVolumeName, caCertsVolumePath, caCertsVolumePath, true, &hostPathDirectoryOrCreate)
// If external etcd is specified, mount the directories needed for accessing the CA/serving certs and the private key
if len(cfg.Etcd.Endpoints) != 0 {
@ -60,23 +62,23 @@ func getHostPathVolumesForTheControlPlane(cfg *kubeadmapi.MasterConfiguration) c
// HostPath volumes for the controller manager
// Read-only mount for the certificates directory
// TODO: Always mount the K8s Certificates directory to a static path inside of the container
mounts.NewHostPathMount(kubeadmconstants.KubeControllerManager, kubeadmconstants.KubeCertificatesVolumeName, cfg.CertificatesDir, cfg.CertificatesDir, true)
mounts.NewHostPathMount(kubeadmconstants.KubeControllerManager, kubeadmconstants.KubeCertificatesVolumeName, cfg.CertificatesDir, cfg.CertificatesDir, true, &hostPathDirectoryOrCreate)
// Read-only mount for the ca certs (/etc/ssl/certs) directory
mounts.NewHostPathMount(kubeadmconstants.KubeControllerManager, caCertsVolumeName, caCertsVolumePath, caCertsVolumePath, true)
mounts.NewHostPathMount(kubeadmconstants.KubeControllerManager, caCertsVolumeName, caCertsVolumePath, caCertsVolumePath, true, &hostPathDirectoryOrCreate)
// 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)
mounts.NewHostPathMount(kubeadmconstants.KubeControllerManager, kubeadmconstants.KubeConfigVolumeName, controllerManagerKubeConfigFile, controllerManagerKubeConfigFile, true, &hostPathFileOrCreate)
// HostPath volumes for the scheduler
// Read-only mount for the scheduler kubeconfig file
schedulerKubeConfigFile := filepath.Join(kubeadmconstants.KubernetesDir, kubeadmconstants.SchedulerKubeConfigFileName)
mounts.NewHostPathMount(kubeadmconstants.KubeScheduler, kubeadmconstants.KubeConfigVolumeName, schedulerKubeConfigFile, schedulerKubeConfigFile, true)
mounts.NewHostPathMount(kubeadmconstants.KubeScheduler, kubeadmconstants.KubeConfigVolumeName, schedulerKubeConfigFile, schedulerKubeConfigFile, true, &hostPathFileOrCreate)
// On some systems were we host-mount /etc/ssl/certs, it is also required to mount /etc/pki. This is needed
// due to symlinks pointing from files in /etc/ssl/certs into /etc/pki/
if isPkiVolumeMountNeeded() {
mounts.NewHostPathMount(kubeadmconstants.KubeAPIServer, caCertsPkiVolumeName, caCertsPkiVolumePath, caCertsPkiVolumePath, true)
mounts.NewHostPathMount(kubeadmconstants.KubeControllerManager, caCertsPkiVolumeName, caCertsPkiVolumePath, caCertsPkiVolumePath, true)
mounts.NewHostPathMount(kubeadmconstants.KubeAPIServer, caCertsPkiVolumeName, caCertsPkiVolumePath, caCertsPkiVolumePath, true, &hostPathDirectoryOrCreate)
mounts.NewHostPathMount(kubeadmconstants.KubeControllerManager, caCertsPkiVolumeName, caCertsPkiVolumePath, caCertsPkiVolumePath, true, &hostPathDirectoryOrCreate)
}
return mounts
@ -95,8 +97,8 @@ func newControlPlaneHostPathMounts() controlPlaneHostPathMounts {
}
}
func (c *controlPlaneHostPathMounts) NewHostPathMount(component, mountName, hostPath, containerPath string, readOnly bool) {
c.volumes[component] = append(c.volumes[component], staticpodutil.NewVolume(mountName, hostPath))
func (c *controlPlaneHostPathMounts) NewHostPathMount(component, mountName, hostPath, containerPath string, readOnly bool, hostPathType *v1.HostPathType) {
c.volumes[component] = append(c.volumes[component], staticpodutil.NewVolume(mountName, hostPath, hostPathType))
c.volumeMounts[component] = append(c.volumeMounts[component], staticpodutil.NewVolumeMount(mountName, containerPath, readOnly))
}
@ -143,9 +145,10 @@ func getEtcdCertVolumes(etcdCfg kubeadmapi.Etcd) ([]v1.Volume, []v1.VolumeMount)
volumes := []v1.Volume{}
volumeMounts := []v1.VolumeMount{}
pathType := v1.HostPathDirectoryOrCreate
for i, certDir := range certDirs.List() {
name := fmt.Sprintf("etcd-certs-%d", i)
volumes = append(volumes, staticpodutil.NewVolume(name, certDir))
volumes = append(volumes, staticpodutil.NewVolume(name, certDir, &pathType))
volumeMounts = append(volumeMounts, staticpodutil.NewVolumeMount(name, certDir, true))
}
return volumes, volumeMounts

113
cmd/kubeadm/app/phases/controlplane/volumes_test.go
View File

@ -29,6 +29,7 @@ import (
)
func TestGetEtcdCertVolumes(t *testing.T) {
hostPathDirectoryOrCreate := v1.HostPathDirectoryOrCreate
var tests = []struct {
ca, cert, key string
vol []v1.Volume
@ -67,7 +68,10 @@ func TestGetEtcdCertVolumes(t *testing.T) {
{
Name: "etcd-certs-0",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/var/lib/certs/etcd"},
HostPath: &v1.HostPathVolumeSource{
Path: "/var/lib/certs/etcd",
Type: &hostPathDirectoryOrCreate,
},
},
},
},
@ -88,13 +92,19 @@ func TestGetEtcdCertVolumes(t *testing.T) {
{
Name: "etcd-certs-0",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/certs/etcd"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/certs/etcd",
Type: &hostPathDirectoryOrCreate,
},
},
},
{
Name: "etcd-certs-1",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/var/lib/certs/etcd"},
HostPath: &v1.HostPathVolumeSource{
Path: "/var/lib/certs/etcd",
Type: &hostPathDirectoryOrCreate,
},
},
},
},
@ -120,19 +130,28 @@ func TestGetEtcdCertVolumes(t *testing.T) {
{
Name: "etcd-certs-0",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/certs/etcd"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/certs/etcd",
Type: &hostPathDirectoryOrCreate,
},
},
},
{
Name: "etcd-certs-1",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/var/lib/certs/etcd"},
HostPath: &v1.HostPathVolumeSource{
Path: "/var/lib/certs/etcd",
Type: &hostPathDirectoryOrCreate,
},
},
},
{
Name: "etcd-certs-2",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/var/lib/certs/private"},
HostPath: &v1.HostPathVolumeSource{
Path: "/var/lib/certs/private",
Type: &hostPathDirectoryOrCreate,
},
},
},
},
@ -163,7 +182,10 @@ func TestGetEtcdCertVolumes(t *testing.T) {
{
Name: "etcd-certs-0",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/certs/etcd"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/certs/etcd",
Type: &hostPathDirectoryOrCreate,
},
},
},
},
@ -184,7 +206,10 @@ func TestGetEtcdCertVolumes(t *testing.T) {
{
Name: "etcd-certs-0",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/certs/etcd"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/certs/etcd",
Type: &hostPathDirectoryOrCreate,
},
},
},
},
@ -222,6 +247,8 @@ func TestGetEtcdCertVolumes(t *testing.T) {
}
func TestGetHostPathVolumesForTheControlPlane(t *testing.T) {
hostPathDirectoryOrCreate := v1.HostPathDirectoryOrCreate
hostPathFileOrCreate := v1.HostPathFileOrCreate
var tests = []struct {
cfg *kubeadmapi.MasterConfiguration
vol map[string][]v1.Volume
@ -238,13 +265,19 @@ func TestGetHostPathVolumesForTheControlPlane(t *testing.T) {
{
Name: "k8s-certs",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: testCertsDir},
HostPath: &v1.HostPathVolumeSource{
Path: testCertsDir,
Type: &hostPathDirectoryOrCreate,
},
},
},
{
Name: "ca-certs",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/ssl/certs"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/ssl/certs",
Type: &hostPathDirectoryOrCreate,
},
},
},
},
@ -252,19 +285,28 @@ func TestGetHostPathVolumesForTheControlPlane(t *testing.T) {
{
Name: "k8s-certs",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: testCertsDir},
HostPath: &v1.HostPathVolumeSource{
Path: testCertsDir,
Type: &hostPathDirectoryOrCreate,
},
},
},
{
Name: "ca-certs",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/ssl/certs"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/ssl/certs",
Type: &hostPathDirectoryOrCreate,
},
},
},
{
Name: "kubeconfig",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/kubernetes/controller-manager.conf"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/kubernetes/controller-manager.conf",
Type: &hostPathFileOrCreate,
},
},
},
},
@ -272,7 +314,10 @@ func TestGetHostPathVolumesForTheControlPlane(t *testing.T) {
{
Name: "kubeconfig",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/kubernetes/scheduler.conf"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/kubernetes/scheduler.conf",
Type: &hostPathFileOrCreate,
},
},
},
},
@ -332,25 +377,37 @@ func TestGetHostPathVolumesForTheControlPlane(t *testing.T) {
{
Name: "k8s-certs",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: testCertsDir},
HostPath: &v1.HostPathVolumeSource{
Path: testCertsDir,
Type: &hostPathDirectoryOrCreate,
},
},
},
{
Name: "ca-certs",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/ssl/certs"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/ssl/certs",
Type: &hostPathDirectoryOrCreate,
},
},
},
{
Name: "etcd-certs-0",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/certs/etcd"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/certs/etcd",
Type: &hostPathDirectoryOrCreate,
},
},
},
{
Name: "etcd-certs-1",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/var/lib/certs/etcd"},
HostPath: &v1.HostPathVolumeSource{
Path: "/var/lib/certs/etcd",
Type: &hostPathDirectoryOrCreate,
},
},
},
},
@ -358,19 +415,28 @@ func TestGetHostPathVolumesForTheControlPlane(t *testing.T) {
{
Name: "k8s-certs",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: testCertsDir},
HostPath: &v1.HostPathVolumeSource{
Path: testCertsDir,
Type: &hostPathDirectoryOrCreate,
},
},
},
{
Name: "ca-certs",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/ssl/certs"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/ssl/certs",
Type: &hostPathDirectoryOrCreate,
},
},
},
{
Name: "kubeconfig",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/kubernetes/controller-manager.conf"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/kubernetes/controller-manager.conf",
Type: &hostPathFileOrCreate,
},
},
},
},
@ -378,7 +444,10 @@ func TestGetHostPathVolumesForTheControlPlane(t *testing.T) {
{
Name: "kubeconfig",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/kubernetes/scheduler.conf"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/kubernetes/scheduler.conf",
Type: &hostPathFileOrCreate,
},
},
},
},

3
cmd/kubeadm/app/phases/etcd/local.go
View File

@ -49,6 +49,7 @@ func CreateLocalEtcdStaticPodManifestFile(manifestDir string, cfg *kubeadmapi.Ma
// GetEtcdPodSpec returns the etcd static Pod actualized to the context of the current MasterConfiguration
// NB. GetEtcdPodSpec methods holds the information about how kubeadm creates etcd static pod mainfests.
func GetEtcdPodSpec(cfg *kubeadmapi.MasterConfiguration) v1.Pod {
pathType := v1.HostPathDirectoryOrCreate
return staticpodutil.ComponentPod(v1.Container{
Name: kubeadmconstants.Etcd,
Command: getEtcdCommand(cfg),
@ -56,7 +57,7 @@ func GetEtcdPodSpec(cfg *kubeadmapi.MasterConfiguration) v1.Pod {
// Mount the etcd datadir path read-write so etcd can store data in a more persistent manner
VolumeMounts: []v1.VolumeMount{staticpodutil.NewVolumeMount(etcdVolumeName, cfg.Etcd.DataDir, false)},
LivenessProbe: staticpodutil.ComponentProbe(2379, "/health", v1.URISchemeHTTP),
}, []v1.Volume{staticpodutil.NewVolume(etcdVolumeName, cfg.Etcd.DataDir)})
}, []v1.Volume{staticpodutil.NewVolume(etcdVolumeName, cfg.Etcd.DataDir, &pathType)})
}
// getEtcdCommand builds the right etcd command from the given config object

12
cmd/kubeadm/app/phases/selfhosting/podspec_mutation_test.go
View File

@ -186,6 +186,7 @@ func TestSetRightDNSPolicyOnPodSpec(t *testing.T) {
}
func TestSetSelfHostedVolumesForAPIServer(t *testing.T) {
hostPathDirectoryOrCreate := v1.HostPathDirectoryOrCreate
var tests = []struct {
podSpec *v1.PodSpec
expected v1.PodSpec
@ -215,6 +216,7 @@ func TestSetSelfHostedVolumesForAPIServer(t *testing.T) {
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/ssl/certs",
Type: &hostPathDirectoryOrCreate,
},
},
},
@ -223,6 +225,7 @@ func TestSetSelfHostedVolumesForAPIServer(t *testing.T) {
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/kubernetes/pki",
Type: &hostPathDirectoryOrCreate,
},
},
},
@ -252,6 +255,7 @@ func TestSetSelfHostedVolumesForAPIServer(t *testing.T) {
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/ssl/certs",
Type: &hostPathDirectoryOrCreate,
},
},
},
@ -276,6 +280,8 @@ func TestSetSelfHostedVolumesForAPIServer(t *testing.T) {
}
func TestSetSelfHostedVolumesForControllerManager(t *testing.T) {
hostPathFileOrCreate := v1.HostPathFileOrCreate
hostPathDirectoryOrCreate := v1.HostPathDirectoryOrCreate
var tests = []struct {
podSpec *v1.PodSpec
expected v1.PodSpec
@ -310,6 +316,7 @@ func TestSetSelfHostedVolumesForControllerManager(t *testing.T) {
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/ssl/certs",
Type: &hostPathDirectoryOrCreate,
},
},
},
@ -318,6 +325,7 @@ func TestSetSelfHostedVolumesForControllerManager(t *testing.T) {
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/kubernetes/pki",
Type: &hostPathDirectoryOrCreate,
},
},
},
@ -326,6 +334,7 @@ func TestSetSelfHostedVolumesForControllerManager(t *testing.T) {
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/kubernetes/controller-manager.conf",
Type: &hostPathFileOrCreate,
},
},
},
@ -360,6 +369,7 @@ func TestSetSelfHostedVolumesForControllerManager(t *testing.T) {
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/ssl/certs",
Type: &hostPathDirectoryOrCreate,
},
},
},
@ -388,6 +398,7 @@ func TestSetSelfHostedVolumesForControllerManager(t *testing.T) {
}
func TestSetSelfHostedVolumesForScheduler(t *testing.T) {
hostPathFileOrCreate := v1.HostPathFileOrCreate
var tests = []struct {
podSpec *v1.PodSpec
expected v1.PodSpec
@ -414,6 +425,7 @@ func TestSetSelfHostedVolumesForScheduler(t *testing.T) {
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/kubernetes/scheduler.conf",
Type: &hostPathFileOrCreate,
},
},
},

4
cmd/kubeadm/app/phases/selfhosting/selfhosting_test.go
View File

@ -249,6 +249,7 @@ spec:
name: ca-certs
- hostPath:
path: /etc/kubernetes/controller-manager.conf
type: FileOrCreate
name: kubeconfig
- hostPath:
path: /etc/pki
@ -324,6 +325,7 @@ spec:
name: ca-certs
- hostPath:
path: /etc/kubernetes/controller-manager.conf
type: FileOrCreate
name: kubeconfig
- hostPath:
path: /etc/pki
@ -374,6 +376,7 @@ spec:
volumes:
- hostPath:
path: /etc/kubernetes/scheduler.conf
type: FileOrCreate
name: kubeconfig
status: {}
`
@ -425,6 +428,7 @@ spec:
volumes:
- hostPath:
path: /etc/kubernetes/scheduler.conf
type: FileOrCreate
name: kubeconfig
updateStrategy: {}
status:

7
cmd/kubeadm/app/util/staticpod/utils.go
View File

@ -82,11 +82,14 @@ func ComponentProbe(port int, path string, scheme v1.URIScheme) *v1.Probe {
}
// NewVolume creates a v1.Volume with a hostPath mount to the specified location
func NewVolume(name, path string) v1.Volume {
func NewVolume(name, path string, pathType *v1.HostPathType) v1.Volume {
return v1.Volume{
Name: name,
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: path},
HostPath: &v1.HostPathVolumeSource{
Path: path,
Type: pathType,
},
},
}
}

10
cmd/kubeadm/app/util/staticpod/utils_test.go
View File

@ -123,10 +123,12 @@ func TestComponentPod(t *testing.T) {
}
func TestNewVolume(t *testing.T) {
hostPathDirectoryOrCreate := v1.HostPathDirectoryOrCreate
var tests = []struct {
name string
path string
expected v1.Volume
pathType *v1.HostPathType
}{
{
name: "foo",
@ -134,14 +136,18 @@ func TestNewVolume(t *testing.T) {
expected: v1.Volume{
Name: "foo",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{Path: "/etc/foo"},
HostPath: &v1.HostPathVolumeSource{
Path: "/etc/foo",
Type: &hostPathDirectoryOrCreate,
},
},
},
pathType: &hostPathDirectoryOrCreate,
},
}
for _, rt := range tests {
actual := NewVolume(rt.name, rt.path)
actual := NewVolume(rt.name, rt.path, rt.pathType)
if !reflect.DeepEqual(actual, rt.expected) {
t.Errorf(
"failed newVolume:\n\texpected: %v\n\t actual: %v",