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/
volume_factory.go
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/
volume_factory.go
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package bpmconverter
import (
"fmt"
"path"
"path/filepath"
"regexp"
"strings"
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"code.cloudfoundry.org/quarks-operator/pkg/bosh/bpm"
bdm "code.cloudfoundry.org/quarks-operator/pkg/bosh/manifest"
bdv1 "code.cloudfoundry.org/quarks-operator/pkg/kube/apis/boshdeployment/v1alpha1"
boshnames "code.cloudfoundry.org/quarks-operator/pkg/kube/util/names"
"code.cloudfoundry.org/quarks-utils/pkg/names"
)
const (
// VolumeRenderingDataName is the volume name for the rendering data.
VolumeRenderingDataName = "rendering-data"
// VolumeRenderingDataMountPath is the mount path for the rendering data.
VolumeRenderingDataMountPath = "/var/vcap/all-releases"
// VolumeJobsDirName is the volume name for the jobs directory.
VolumeJobsDirName = "jobs-dir"
// VolumeJobsDirMountPath is the mount path for the jobs directory.
VolumeJobsDirMountPath = "/var/vcap/jobs"
// VolumeJobsSrcDirName is the volume name for the jobs-src directory.
VolumeJobsSrcDirName = "jobs-src-dir"
// VolumeJobsSrcDirMountPath is the mount path for the jobs-src directory.
VolumeJobsSrcDirMountPath = "/var/vcap/jobs-src"
// VolumeDataDirMountPath is the mount path for the ephemeral (data) directory.
VolumeDataDirMountPath = bdm.DataDir
// VolumeSysDirName is the volume name for the sys directory.
VolumeSysDirName = "sys-dir"
// VolumeSysDirMountPath is the mount path for the sys directory.
VolumeSysDirMountPath = bdm.SysDir
// VolumeDrainStampsName is the volume name for the drain-stamps directory.
VolumeDrainStampsName = "drain-stamps"
// VolumeDrainStampsMountPath is the mount path for the drain-stamps directory.
VolumeDrainStampsMountPath = "/mnt/drain-stamps"
// VolumeStoreDirMountPath is the mount path for the store directory.
VolumeStoreDirMountPath = "/var/vcap/store"
// AdditionalVolumeBaseName helps in building an additional volume name together with
// the index under the additional_volumes bpm list inside the bpm process schema.
AdditionalVolumeBaseName = "bpm-additional-volume"
// AdditionalVolumesRegex ensures only a valid path is defined
// under the additional_volumes bpm list inside the bpm process schema.
AdditionalVolumesRegex = "((/var/vcap/data/.+)|(/var/vcap/store/.+)|(/var/vcap/sys/run/.+))"
// AdditionalVolumesVcapStoreRegex ensures that the path is of the form
// /var/vcap/store.
AdditionalVolumesVcapStoreRegex = "(/var/vcap/store/.+)"
// UnrestrictedVolumeBaseName is the volume name for the unrestricted ones.
UnrestrictedVolumeBaseName = "bpm-unrestricted-volume"
// resolvedPropertiesFormat describes where to mount the BOSH manifest
resolvedPropertiesFormat = "/var/run/secrets/resolved-properties/%s"
// defaultEphemeralVolumeSize is the default size for a PVC used for an ephemeral disk (10GB).
// This value is used if the ephemeral disk size and the persistent disk sizes are not set.
defaultEphemeralVolumeSize = 10240
)
// VolumeFactoryImpl is a concrete implementation of VolumeFactory
type VolumeFactoryImpl struct {
}
// NewVolumeFactory returns a concrete implementation of VolumeFactory
func NewVolumeFactory() *VolumeFactoryImpl {
return &VolumeFactoryImpl{}
}
// GenerateDefaultDisks defines default disks. This looks for:
// - the rendering data volume
// - the the jobs volume
// - the ephemeral (data) volume
// - the sys volume
// - the "not interpolated" manifest volume
// - resolved properties data volume
// - shared empty dir for drain-stamps files
func (f *VolumeFactoryImpl) GenerateDefaultDisks(instanceGroup *bdm.InstanceGroup, igResolvedSecretVersion string, namespace string) bdm.Disks {
resolvedPropertiesSecretName := boshnames.InstanceGroupSecretName(
instanceGroup.Name,
igResolvedSecretVersion,
)
var pvc *corev1.PersistentVolumeClaim
ephemeralAsPVC := instanceGroup.Env.AgentEnvBoshConfig.Agent.Settings.EphemeralAsPVC
if ephemeralAsPVC {
pvc = ephemeralPVC(instanceGroup, namespace)
}
return bdm.Disks{
{
Volume: renderingVolume(),
VolumeMount: renderingVolumeMount(),
},
{
Volume: jobsDirVolume(),
VolumeMount: jobsDirVolumeMount(),
},
{
// For ephemeral job data.
// https://bosh.io/docs/vm-config/#jobs-and-packages
Volume: &corev1.Volume{
Name: volumeDataDirName(instanceGroup.Name),
VolumeSource: corev1.VolumeSource{EmptyDir: &corev1.EmptyDirVolumeSource{}},
},
VolumeMount: &corev1.VolumeMount{
Name: volumeDataDirName(instanceGroup.Name),
MountPath: VolumeDataDirMountPath,
},
PersistentVolumeClaim: pvc,
},
{
Volume: sysDirVolume(),
VolumeMount: sysDirVolumeMount(),
},
{
Volume: resolvedPropertiesVolume(resolvedPropertiesSecretName),
},
{
Volume: &corev1.Volume{
Name: VolumeDrainStampsName,
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{Medium: corev1.StorageMediumMemory},
},
},
VolumeMount: &corev1.VolumeMount{
Name: VolumeDrainStampsName,
MountPath: VolumeDrainStampsMountPath,
},
},
}
}
// GenerateBPMDisks defines any other volumes required to be mounted,
// based on the bpm process schema definition. This looks for:
// - ephemeral_disk (boolean)
// - persistent_disk (boolean)
// - additional_volumes (list of volumes)
// - unrestricted_volumes (list of volumes)
func (f *VolumeFactoryImpl) GenerateBPMDisks(instanceGroup *bdm.InstanceGroup, bpmConfigs bpm.Configs, namespace string) (bdm.Disks, error) {
bpmDisks := make(bdm.Disks, 0)
rAdditionalVolumes := regexp.MustCompile(AdditionalVolumesRegex)
for _, job := range instanceGroup.Jobs {
bpmConfig := bpmConfigs[job.Name]
hasEphemeralDisk := false
hasPersistentDisk := false
for _, process := range bpmConfig.Processes {
processEphemeralDisk := false
if process.EphemeralDisk != nil {
processEphemeralDisk = *process.EphemeralDisk
}
processPersistentDisk := false
if process.PersistentDisk != nil {
processPersistentDisk = *process.PersistentDisk
}
if !hasEphemeralDisk && processEphemeralDisk {
hasEphemeralDisk = true
}
if !hasPersistentDisk && processPersistentDisk {
hasPersistentDisk = true
}
// Because we use subpaths for data, store or sys mounts, we want to
// treat unrestricted volumes as additional volumes.
filteredUnrestrictedVolumes := []bpm.Volume{}
for _, unrestrictedVolume := range process.Unsafe.UnrestrictedVolumes {
// /var/vcap/jobs is already mounted everywhere for quarks, so we ignore anything in there.
if strings.HasPrefix(unrestrictedVolume.Path, VolumeJobsDirMountPath) {
continue
}
// To consider an unrestricted volume to be an additional volume, the prefix must match, but
// the volume shouldn't be equal to the known
// - /var/vcap/data
// - /var/vcap/store
// - /var/vcap
if (strings.HasPrefix(unrestrictedVolume.Path, VolumeDataDirMountPath) && unrestrictedVolume.Path != VolumeDataDirMountPath) ||
(strings.HasPrefix(unrestrictedVolume.Path, VolumeStoreDirMountPath) && unrestrictedVolume.Path != VolumeStoreDirMountPath) ||
(strings.HasPrefix(unrestrictedVolume.Path, VolumeSysDirMountPath) && unrestrictedVolume.Path != VolumeSysDirMountPath) {
process.AdditionalVolumes = append(process.AdditionalVolumes, unrestrictedVolume)
continue
}
filteredUnrestrictedVolumes = append(filteredUnrestrictedVolumes, unrestrictedVolume)
}
process.Unsafe.UnrestrictedVolumes = filteredUnrestrictedVolumes
for _, additionalVolume := range process.AdditionalVolumes {
match := rAdditionalVolumes.MatchString(additionalVolume.Path)
if !match {
return nil, errors.Errorf("the '%s' path, must be a path inside"+
" '/var/vcap/data', '/var/vcap/store' or '/var/vcap/sys/run', for a path outside these,"+
" you must use the unrestricted_volumes key", additionalVolume.Path)
}
var (
err error
volumeName string
subPath string
)
if strings.HasPrefix(additionalVolume.Path, VolumeDataDirMountPath) {
volumeName = volumeDataDirName(
instanceGroup.Name)
subPath, err = filepath.Rel(VolumeDataDirMountPath, additionalVolume.Path)
}
if strings.HasPrefix(additionalVolume.Path, VolumeStoreDirMountPath) {
volumeName = generatePersistentVolumeClaimName(instanceGroup.Name)
subPath, err = filepath.Rel(VolumeStoreDirMountPath, additionalVolume.Path)
}
if strings.HasPrefix(additionalVolume.Path, VolumeSysDirMountPath) {
volumeName = VolumeSysDirName
subPath, err = filepath.Rel(VolumeSysDirMountPath, additionalVolume.Path)
}
if err != nil {
return nil, errors.Wrapf(err, "failed to calculate subpath for additional volume mount '%s'", additionalVolume.Path)
}
additionalDisk := bdm.Disk{
VolumeMount: &corev1.VolumeMount{
Name: volumeName,
ReadOnly: !additionalVolume.Writable,
MountPath: additionalVolume.Path,
SubPath: subPath,
},
Filters: map[string]string{
"job_name": job.Name,
"process_name": process.Name,
},
}
bpmDisks = append(bpmDisks, additionalDisk)
}
for i, unrestrictedVolume := range process.Unsafe.UnrestrictedVolumes {
volumeName := names.Sanitize(fmt.Sprintf("%s-%s-%s-%b", UnrestrictedVolumeBaseName, job.Name, process.Name, i))
unrestrictedDisk := bdm.Disk{
Volume: &corev1.Volume{
Name: volumeName,
VolumeSource: corev1.VolumeSource{EmptyDir: &corev1.EmptyDirVolumeSource{}},
},
VolumeMount: &corev1.VolumeMount{
Name: volumeName,
ReadOnly: !unrestrictedVolume.Writable,
MountPath: unrestrictedVolume.Path,
},
Filters: map[string]string{
"job_name": job.Name,
"process_name": process.Name,
},
}
bpmDisks = append(bpmDisks, unrestrictedDisk)
}
}
if hasEphemeralDisk {
disk := ephemeralDisk(
namespace,
instanceGroup,
job,
)
bpmDisks = append(bpmDisks, disk)
}
if hasPersistentDisk {
if instanceGroup.PersistentDisk == nil || *instanceGroup.PersistentDisk <= 0 {
return bpmDisks, errors.Errorf("job '%s' wants to use persistent disk"+
" but instance group '%s' doesn't have any persistent disk declaration", job.Name, instanceGroup.Name)
}
disk := persistentDisk(
namespace,
instanceGroup,
job,
)
bpmDisks = append(bpmDisks, disk)
}
}
return bpmDisks, nil
}
func persistentDisk(namespace string, instanceGroup *bdm.InstanceGroup, job bdm.Job) bdm.Disk {
persistentVolumeClaim := generatePersistentVolumeClaim(instanceGroup, namespace)
// Specify the job sub-path inside of the instance group PV
bpmPersistentDisk := bdm.Disk{
PersistentVolumeClaim: &persistentVolumeClaim,
Volume: &corev1.Volume{
Name: persistentVolumeClaim.Name,
VolumeSource: corev1.VolumeSource{
PersistentVolumeClaim: &corev1.PersistentVolumeClaimVolumeSource{
ClaimName: persistentVolumeClaim.Name,
},
},
},
VolumeMount: &corev1.VolumeMount{
Name: persistentVolumeClaim.Name,
MountPath: path.Join(VolumeStoreDirMountPath, job.Name),
SubPath: job.Name,
},
Filters: map[string]string{
"job_name": job.Name,
"persistent": "true",
},
}
return bpmPersistentDisk
}
func ephemeralDisk(namespace string, instanceGroup *bdm.InstanceGroup, job bdm.Job) bdm.Disk {
persistent := instanceGroup.Env.AgentEnvBoshConfig.Agent.Settings.EphemeralAsPVC
ephemeralDisk := bdm.Disk{
VolumeMount: &corev1.VolumeMount{
Name: volumeDataDirName(instanceGroup.Name),
MountPath: path.Join(VolumeDataDirMountPath, job.Name),
SubPath: job.Name,
},
Filters: map[string]string{
"job_name": job.Name,
"ephemeral": "true",
},
}
if persistent {
persistentVolumeClaim := ephemeralPVC(instanceGroup, namespace)
ephemeralDisk = bdm.Disk{
PersistentVolumeClaim: persistentVolumeClaim,
Volume: &corev1.Volume{
Name: persistentVolumeClaim.Name,
VolumeSource: corev1.VolumeSource{
PersistentVolumeClaim: &corev1.PersistentVolumeClaimVolumeSource{
ClaimName: persistentVolumeClaim.Name,
},
},
},
VolumeMount: &corev1.VolumeMount{
Name: persistentVolumeClaim.Name,
MountPath: path.Join(VolumeDataDirMountPath, job.Name),
SubPath: job.Name,
},
Filters: map[string]string{
"job_name": job.Name,
"ephemeral": "true",
},
}
}
return ephemeralDisk
}
func ephemeralPVCSize(instanceGroup *bdm.InstanceGroup) int {
diskSize := defaultEphemeralVolumeSize
if instanceGroup.PersistentDisk != nil {
diskSize = *instanceGroup.PersistentDisk
}
if instanceGroup.VMResources != nil && instanceGroup.VMResources.EphemeralDiskSize > 0 {
diskSize = instanceGroup.VMResources.EphemeralDiskSize
}
return diskSize
}
// ephemeralPVC returns a PVC to be used for ephemeral disks
func ephemeralPVC(instanceGroup *bdm.InstanceGroup, namespace string) *corev1.PersistentVolumeClaim {
diskSize := ephemeralPVCSize(instanceGroup)
if instanceGroup.PersistentDisk != nil {
diskSize = *instanceGroup.PersistentDisk
}
if instanceGroup.VMResources != nil && instanceGroup.VMResources.EphemeralDiskSize > 0 {
diskSize = instanceGroup.VMResources.EphemeralDiskSize
}
persistentVolumeClaim := corev1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
Name: ephemeralPVCName(instanceGroup.Name),
Namespace: namespace,
},
Spec: corev1.PersistentVolumeClaimSpec{
AccessModes: []corev1.PersistentVolumeAccessMode{corev1.ReadWriteOnce},
Resources: corev1.ResourceRequirements{
Requests: corev1.ResourceList{
corev1.ResourceName(corev1.ResourceStorage): resource.MustParse(fmt.Sprintf("%d%s", diskSize, "Mi")),
},
},
},
}
// add storage class if specified
if instanceGroup.PersistentDiskType != "" {
persistentVolumeClaim.Spec.StorageClassName = &instanceGroup.PersistentDiskType
}
return &persistentVolumeClaim
}
func generatePersistentVolumeClaim(instanceGroup *bdm.InstanceGroup, namespace string) corev1.PersistentVolumeClaim {
// Spec of a persistentVolumeClaim
persistentVolumeClaim := corev1.PersistentVolumeClaim{
ObjectMeta: metav1.ObjectMeta{
Name: generatePersistentVolumeClaimName(instanceGroup.Name),
Namespace: namespace,
},
Spec: corev1.PersistentVolumeClaimSpec{
AccessModes: []corev1.PersistentVolumeAccessMode{corev1.ReadWriteOnce},
Resources: corev1.ResourceRequirements{
Requests: corev1.ResourceList{
corev1.ResourceName(corev1.ResourceStorage): resource.MustParse(fmt.Sprintf("%d%s", *instanceGroup.PersistentDisk, "Mi")),
},
},
},
}
// add storage class if specified
if instanceGroup.PersistentDiskType != "" {
persistentVolumeClaim.Spec.StorageClassName = &instanceGroup.PersistentDiskType
}
return persistentVolumeClaim
}
func ephemeralPVCName(instanceGroupName string) string {
return names.Sanitize(fmt.Sprintf("%s-%s", instanceGroupName, "ephemeral"))
}
func generatePersistentVolumeClaimName(instanceGroupName string) string {
return names.Sanitize(fmt.Sprintf("%s-%s", instanceGroupName, "pvc"))
}
func renderingVolume() *corev1.Volume {
return &corev1.Volume{
Name: VolumeRenderingDataName,
VolumeSource: corev1.VolumeSource{EmptyDir: &corev1.EmptyDirVolumeSource{}},
}
}
func renderingVolumeMount() *corev1.VolumeMount {
return &corev1.VolumeMount{
Name: VolumeRenderingDataName,
MountPath: VolumeRenderingDataMountPath,
}
}
func jobsDirVolume() *corev1.Volume {
return &corev1.Volume{
Name: VolumeJobsDirName,
VolumeSource: corev1.VolumeSource{EmptyDir: &corev1.EmptyDirVolumeSource{}},
}
}
func jobsDirVolumeMount() *corev1.VolumeMount {
return &corev1.VolumeMount{
Name: VolumeJobsDirName,
MountPath: VolumeJobsDirMountPath,
}
}
func resolvedPropertiesVolume(name string) *corev1.Volume {
return &corev1.Volume{
Name: bdv1.DeploymentSecretTypeInstanceGroupResolvedProperties.String(),
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: name,
},
},
}
}
func resolvedPropertiesVolumeMount(instanceGroupName string) corev1.VolumeMount {
return corev1.VolumeMount{
Name: "ig-resolved",
MountPath: fmt.Sprintf(resolvedPropertiesFormat, instanceGroupName),
ReadOnly: true,
}
}
func sysDirVolume() *corev1.Volume {
return &corev1.Volume{
Name: VolumeSysDirName,
VolumeSource: corev1.VolumeSource{EmptyDir: &corev1.EmptyDirVolumeSource{}},
}
}
// volumeDataDirName is the volume name for the data directory.
func volumeDataDirName(instanceGroupName string) string {
return ephemeralPVCName(instanceGroupName)
}
func sysDirVolumeMount() *corev1.VolumeMount {
return &corev1.VolumeMount{
Name: VolumeSysDirName,
MountPath: VolumeSysDirMountPath,
}
}
func deduplicateVolumeMounts(volumeMounts []corev1.VolumeMount) []corev1.VolumeMount {
result := []corev1.VolumeMount{}
uniqueMounts := map[string]struct{}{}
for _, volumeMount := range volumeMounts {
if _, ok := uniqueMounts[volumeMount.MountPath]; ok {
continue
}
uniqueMounts[volumeMount.MountPath] = struct{}{}
result = append(result, volumeMount)
}
return result
}