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Diffstat (limited to 'libpod/kube.go')
-rw-r--r--libpod/kube.go147
1 files changed, 104 insertions, 43 deletions
diff --git a/libpod/kube.go b/libpod/kube.go
index 1622246d5..08ab7a4a4 100644
--- a/libpod/kube.go
+++ b/libpod/kube.go
@@ -3,6 +3,7 @@ package libpod
import (
"fmt"
"math/rand"
+ "os"
"strconv"
"strings"
"time"
@@ -132,32 +133,43 @@ func (p *Pod) podWithContainers(containers []*Container, ports []v1.ContainerPor
var (
podContainers []v1.Container
)
+ deDupPodVolumes := make(map[string]*v1.Volume)
first := true
for _, ctr := range containers {
if !ctr.IsInfra() {
- result, err := containerToV1Container(ctr)
+ ctr, volumes, err := containerToV1Container(ctr)
if err != nil {
return nil, err
}
// Since port bindings for the pod are handled by the
// infra container, wipe them here.
- result.Ports = nil
+ ctr.Ports = nil
// We add the original port declarations from the libpod infra container
// to the first kubernetes container description because otherwise we loose
// the original container/port bindings.
if first && len(ports) > 0 {
- result.Ports = ports
+ ctr.Ports = ports
first = false
}
- podContainers = append(podContainers, result)
+ podContainers = append(podContainers, ctr)
+ // Deduplicate volumes, so if containers in the pod share a volume, it's only
+ // listed in the volumes section once
+ for _, vol := range volumes {
+ deDupPodVolumes[vol.Name] = &vol
+ }
}
}
- return addContainersToPodObject(podContainers, p.Name()), nil
+ podVolumes := make([]v1.Volume, 0, len(deDupPodVolumes))
+ for _, vol := range deDupPodVolumes {
+ podVolumes = append(podVolumes, *vol)
+ }
+
+ return addContainersAndVolumesToPodObject(podContainers, podVolumes, p.Name()), nil
}
-func addContainersToPodObject(containers []v1.Container, podName string) *v1.Pod {
+func addContainersAndVolumesToPodObject(containers []v1.Container, volumes []v1.Volume, podName string) *v1.Pod {
tm := v12.TypeMeta{
Kind: "Pod",
APIVersion: "v1",
@@ -177,6 +189,7 @@ func addContainersToPodObject(containers []v1.Container, podName string) *v1.Pod
}
ps := v1.PodSpec{
Containers: containers,
+ Volumes: volumes,
}
p := v1.Pod{
TypeMeta: tm,
@@ -190,56 +203,58 @@ func addContainersToPodObject(containers []v1.Container, podName string) *v1.Pod
// for a single container. we "insert" that container description in a pod.
func simplePodWithV1Container(ctr *Container) (*v1.Pod, error) {
var containers []v1.Container
- result, err := containerToV1Container(ctr)
+ kubeCtr, kubeVols, err := containerToV1Container(ctr)
if err != nil {
return nil, err
}
- containers = append(containers, result)
- return addContainersToPodObject(containers, ctr.Name()), nil
+ containers = append(containers, kubeCtr)
+ return addContainersAndVolumesToPodObject(containers, kubeVols, ctr.Name()), nil
}
// containerToV1Container converts information we know about a libpod container
// to a V1.Container specification.
-func containerToV1Container(c *Container) (v1.Container, error) {
+func containerToV1Container(c *Container) (v1.Container, []v1.Volume, error) {
kubeContainer := v1.Container{}
+ kubeVolumes := []v1.Volume{}
kubeSec, err := generateKubeSecurityContext(c)
if err != nil {
- return kubeContainer, err
+ return kubeContainer, kubeVolumes, err
}
if len(c.config.Spec.Linux.Devices) > 0 {
// TODO Enable when we can support devices and their names
devices, err := generateKubeVolumeDeviceFromLinuxDevice(c.Spec().Linux.Devices)
if err != nil {
- return kubeContainer, err
+ return kubeContainer, kubeVolumes, err
}
kubeContainer.VolumeDevices = devices
- return kubeContainer, errors.Wrapf(define.ErrNotImplemented, "linux devices")
+ return kubeContainer, kubeVolumes, errors.Wrapf(define.ErrNotImplemented, "linux devices")
}
if len(c.config.UserVolumes) > 0 {
// TODO When we until we can resolve what the volume name should be, this is disabled
// Volume names need to be coordinated "globally" in the kube files.
- volumes, err := libpodMountsToKubeVolumeMounts(c)
+ volumeMounts, volumes, err := libpodMountsToKubeVolumeMounts(c)
if err != nil {
- return kubeContainer, err
+ return kubeContainer, kubeVolumes, err
}
- kubeContainer.VolumeMounts = volumes
+ kubeContainer.VolumeMounts = volumeMounts
+ kubeVolumes = append(kubeVolumes, volumes...)
}
envVariables, err := libpodEnvVarsToKubeEnvVars(c.config.Spec.Process.Env)
if err != nil {
- return kubeContainer, err
+ return kubeContainer, kubeVolumes, err
}
portmappings, err := c.PortMappings()
if err != nil {
- return kubeContainer, err
+ return kubeContainer, kubeVolumes, err
}
ports, err := ocicniPortMappingToContainerPort(portmappings)
if err != nil {
- return kubeContainer, err
+ return kubeContainer, kubeVolumes, err
}
containerCommands := c.Command()
@@ -263,7 +278,7 @@ func containerToV1Container(c *Container) (v1.Container, error) {
kubeContainer.StdinOnce = false
kubeContainer.TTY = c.config.Spec.Process.Terminal
- return kubeContainer, nil
+ return kubeContainer, kubeVolumes, nil
}
// ocicniPortMappingToContainerPort takes an ocicni portmapping and converts
@@ -325,36 +340,82 @@ func libpodMaxAndMinToResourceList(c *Container) (v1.ResourceList, v1.ResourceLi
return maxResources, minResources
}
-func generateKubeVolumeMount(hostSourcePath string, mounts []specs.Mount) (v1.VolumeMount, error) {
- vm := v1.VolumeMount{}
+// libpodMountsToKubeVolumeMounts converts the containers mounts to a struct kube understands
+func libpodMountsToKubeVolumeMounts(c *Container) ([]v1.VolumeMount, []v1.Volume, error) {
+ var vms []v1.VolumeMount
+ var vos []v1.Volume
+
+ // TjDO when named volumes are supported in play kube, also parse named volumes here
+ _, mounts := c.sortUserVolumes(c.config.Spec)
for _, m := range mounts {
- if m.Source == hostSourcePath {
- // TODO Name is not provided and is required by Kube; therefore, this is disabled earlier
- //vm.Name =
- vm.MountPath = m.Source
- vm.SubPath = m.Destination
- if util.StringInSlice("ro", m.Options) {
- vm.ReadOnly = true
- }
- return vm, nil
+ vm, vo, err := generateKubeVolumeMount(m)
+ if err != nil {
+ return vms, vos, err
}
+ vms = append(vms, vm)
+ vos = append(vos, vo)
}
- return vm, errors.New("unable to find mount source")
+ return vms, vos, nil
}
-// libpodMountsToKubeVolumeMounts converts the containers mounts to a struct kube understands
-func libpodMountsToKubeVolumeMounts(c *Container) ([]v1.VolumeMount, error) {
- // At this point, I dont think we can distinguish between the default
- // volume mounts and user added ones. For now, we pass them all.
- var vms []v1.VolumeMount
- for _, hostSourcePath := range c.config.UserVolumes {
- vm, err := generateKubeVolumeMount(hostSourcePath, c.config.Spec.Mounts)
- if err != nil {
- continue
+// generateKubeVolumeMount takes a user specfied mount and returns
+// a kubernetes VolumeMount (to be added to the container) and a kubernetes Volume
+// (to be added to the pod)
+func generateKubeVolumeMount(m specs.Mount) (v1.VolumeMount, v1.Volume, error) {
+ vm := v1.VolumeMount{}
+ vo := v1.Volume{}
+
+ name, err := convertVolumePathToName(m.Source)
+ if err != nil {
+ return vm, vo, err
+ }
+ vm.Name = name
+ vm.MountPath = m.Destination
+ if util.StringInSlice("ro", m.Options) {
+ vm.ReadOnly = true
+ }
+
+ vo.Name = name
+ vo.HostPath = &v1.HostPathVolumeSource{}
+ vo.HostPath.Path = m.Source
+ isDir, err := isHostPathDirectory(m.Source)
+ // neither a directory or a file lives here, default to creating a directory
+ // TODO should this be an error instead?
+ var hostPathType v1.HostPathType
+ if err != nil {
+ hostPathType = v1.HostPathDirectoryOrCreate
+ } else if isDir {
+ hostPathType = v1.HostPathDirectory
+ } else {
+ hostPathType = v1.HostPathFile
+ }
+ vo.HostPath.Type = &hostPathType
+
+ return vm, vo, nil
+}
+
+func isHostPathDirectory(hostPathSource string) (bool, error) {
+ info, err := os.Stat(hostPathSource)
+ if err != nil {
+ return false, err
+ }
+ return info.Mode().IsDir(), nil
+}
+
+func convertVolumePathToName(hostSourcePath string) (string, error) {
+ if len(hostSourcePath) == 0 {
+ return "", errors.Errorf("hostSourcePath must be specified to generate volume name")
+ }
+ if len(hostSourcePath) == 1 {
+ if hostSourcePath != "/" {
+ return "", errors.Errorf("hostSourcePath malformatted: %s", hostSourcePath)
}
- vms = append(vms, vm)
+ // add special case name
+ return "root", nil
}
- return vms, nil
+ // First, trim trailing slashes, then replace slashes with dashes.
+ // Thus, /mnt/data/ will become mnt-data
+ return strings.Replace(strings.Trim(hostSourcePath, "/"), "/", "-", -1), nil
}
func determineCapAddDropFromCapabilities(defaultCaps, containerCaps []string) *v1.Capabilities {
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-15 10:07:54 +0000