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pvsetup.go
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pvsetup.go
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package openshift
import (
"fmt"
kerrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apiserver/pkg/authentication/serviceaccount"
kapi "k8s.io/kubernetes/pkg/api"
kbatch "k8s.io/kubernetes/pkg/apis/batch"
kclientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
"github.com/openshift/origin/pkg/client"
"github.com/openshift/origin/pkg/oc/bootstrap/docker/errors"
)
const (
pvCount = 100
pvSetupJobName = "persistent-volume-setup"
pvInstallerSA = "pvinstaller"
pvSetupNamespace = "default"
)
const createPVScript = `#/bin/bash
set -e
function generate_pv() {
local basedir="${1}"
local name="${2}"
cat <<EOF
apiVersion: v1
kind: PersistentVolume
metadata:
name: ${name}
labels:
volume: ${name}
spec:
capacity:
storage: 100Gi
accessModes:
- ReadWriteOnce
- ReadWriteMany
- ReadOnlyMany
hostPath:
path: ${basedir}/${name}
persistentVolumeReclaimPolicy: Recycle
EOF
}
function setup_pv_dir() {
local dir="${1}"
if [[ ! -d "${dir}" ]]; then
mkdir -p "${dir}"
fi
if ! chcon -t svirt_sandbox_file_t "${dir}" &> /dev/null; then
echo "Not setting SELinux content for ${dir}"
fi
chmod 770 "${dir}"
}
function create_pv() {
local basedir="${1}"
local name="${2}"
setup_pv_dir "${basedir}/${name}"
if ! oc get pv "${name}" &> /dev/null; then
generate_pv "${basedir}" "${name}" | oc create -f -
else
echo "persistentvolume ${name} already exists"
fi
}
basedir="%[2]s"
setup_pv_dir "${basedir}/registry"
for i in $(seq -f "%%04g" 1 %[1]d); do
create_pv "${basedir}" "pv${i}"
done
`
func (h *Helper) SetupPersistentStorage(osclient client.Interface, kclient kclientset.Interface, dir string) error {
err := h.ensurePVInstallerSA(osclient, kclient)
if err != nil {
return err
}
_, err = kclient.Batch().Jobs(pvSetupNamespace).Get(pvSetupJobName, metav1.GetOptions{})
if err == nil {
// Job exists, it should run to completion
return nil
}
if !kerrors.IsNotFound(err) {
return errors.NewError("error retrieving job to setup persistent volumes (%s/%s)", pvSetupNamespace, pvSetupJobName).WithCause(err).WithDetails(h.OriginLog())
}
setupJob := persistentStorageSetupJob(pvSetupJobName, dir, h.image)
if _, err = kclient.Batch().Jobs(pvSetupNamespace).Create(setupJob); err != nil {
return errors.NewError("cannot create job to setup persistent volumes (%s/%s)", pvSetupNamespace, pvSetupJobName).WithCause(err).WithDetails(h.OriginLog())
}
return nil
}
func (h *Helper) ensurePVInstallerSA(osclient client.Interface, kclient kclientset.Interface) error {
createSA := false
sa, err := kclient.Core().ServiceAccounts(pvSetupNamespace).Get(pvInstallerSA, metav1.GetOptions{})
if err != nil {
if !kerrors.IsNotFound(err) {
return errors.NewError("error retrieving installer service account (%s/%s)", pvSetupNamespace, pvInstallerSA).WithCause(err).WithDetails(h.OriginLog())
}
createSA = true
}
// Create installer SA
if createSA {
sa = &kapi.ServiceAccount{}
sa.Name = pvInstallerSA
_, err = kclient.Core().ServiceAccounts(pvSetupNamespace).Create(sa)
if err != nil {
return errors.NewError("cannot create pvinstaller service account").WithCause(err).WithDetails(h.OriginLog())
}
}
err = AddSCCToServiceAccount(kclient, "privileged", "pvinstaller", "default")
if err != nil {
return errors.NewError("cannot add privileged SCC to pvinstaller service account").WithCause(err).WithDetails(h.OriginLog())
}
saUser := serviceaccount.MakeUsername(pvSetupNamespace, pvInstallerSA)
err = AddClusterRole(osclient, "cluster-admin", saUser)
if err != nil {
return errors.NewError("cannot add cluster role to service account (%s/%s)", pvSetupNamespace, pvInstallerSA).WithCause(err).WithDetails(h.OriginLog())
}
return nil
}
func persistentStorageSetupJob(name, dir, image string) *kbatch.Job {
// Job volume
volume := kapi.Volume{}
volume.Name = "pvdir"
volume.HostPath = &kapi.HostPathVolumeSource{Path: dir}
// Volume mount
mount := kapi.VolumeMount{}
mount.Name = "pvdir"
mount.MountPath = dir
// Job container
container := kapi.Container{}
container.Name = "storage-setup-job"
container.Image = image
container.Command = []string{"/bin/bash", "-c", fmt.Sprintf(createPVScript, pvCount, dir)}
privileged := true
container.SecurityContext = &kapi.SecurityContext{
Privileged: &privileged,
}
container.VolumeMounts = []kapi.VolumeMount{mount}
// Job
completions := int32(1)
deadline := int64(60 * 20)
job := &kbatch.Job{}
job.Name = name
job.Spec.Completions = &completions
job.Spec.ActiveDeadlineSeconds = &deadline
job.Spec.Template.Spec.Volumes = []kapi.Volume{volume}
job.Spec.Template.Spec.RestartPolicy = kapi.RestartPolicyNever
job.Spec.Template.Spec.ServiceAccountName = "pvinstaller"
job.Spec.Template.Spec.Containers = []kapi.Container{container}
return job
}