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Add missing pvname #250

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b48ecac
Add missing pvname
robkooper Nov 19, 2022
7a1baca
fix typo and space
robkooper Nov 24, 2022
b47ac8e
fix tyopos
robkooper Nov 25, 2022
faed42f
Update README.md
robkooper Mar 17, 2023
92d3dd7
Merge remote-tracking branch 'upstream/master' into add-volume-parame…
robkooper Aug 11, 2023
a398074
updates
robkooper Aug 11, 2023
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12 changes: 6 additions & 6 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -186,7 +186,7 @@ $ oc adm policy add-scc-to-user hostmount-anyuid system:serviceaccount:$NAMESPAC

If you would like to use a custom built nfs-subdir-external-provisioner image, you must edit the provisioner's deployment file to specify the correct location of your `nfs-client-provisioner` container image.

Next you must edit the provisioner's deployment file to add connection information for your NFS server. Edit `deploy/deployment.yaml` and replace the two occurences of <YOUR NFS SERVER HOSTNAME> with your server's hostname.
Next you must edit the provisioner's deployment file to add connection information for your NFS server. Edit `deploy/deployment.yaml` and replace the two occurrences of <YOUR NFS SERVER HOSTNAME> with your server's hostname.

```yaml
kind: Deployment
Expand Down Expand Up @@ -234,11 +234,11 @@ To disable leader election, define an env variable named ENABLE_LEADER_ELECTION

**_Parameters:_**

| Name | Description | Default |
| --------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :--------------------------------------------------------------: |
| onDelete | If it exists and has a delete value, delete the directory, if it exists and has a retain value, save the directory. | will be archived with name on the share: `archived-<volume.Name>` |
| archiveOnDelete | If it exists and has a false value, delete the directory. if `onDelete` exists, `archiveOnDelete` will be ignored. | will be archived with name on the share: `archived-<volume.Name>` |
| pathPattern | Specifies a template for creating a directory path via PVC metadata's such as labels, annotations, name or namespace. To specify metadata use `${.PVC.<metadata>}`. Example: If folder should be named like `<pvc-namespace>-<pvc-name>`, use `${.PVC.namespace}-${.PVC.name}` as pathPattern. | n/a |
| Name | Description | Default |
| --------------- | ------------------------------------------------------------ | :----------------------------------------------------------: |
| onDelete | If it exists and has a delete value, delete the directory, if it exists and has a retain value, save the directory. | will be archived with name on the share: `archived-<volume.Name>` |
| archiveOnDelete | If it exists and has a false value, delete the directory. if `onDelete` exists, `archiveOnDelete` will be ignored. | will be archived with name on the share: `archived-<volume.Name>` |
| pathPattern | Specifies a template for creating a directory path via PVC metadata's such as labels, annotations, name or namespace. To specify metadata use `${.PVC.<metadata>}`. Example: If folder should be named like `<pvc-namespace>-<pvc-name>`, use `${.PVC.namespace}-${.PVC.name}` as pathPattern. The default pattern will add the pvname to folder, which will result in a unique folder name, combining namespace, name and an unique id. | `${.PVC.namespace}-${.PVC.name}-${.PVC.pvname}` |
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This is `deploy/class.yaml` which defines the NFS subdir external provisioner's Kubernetes Storage Class:

Expand Down
34 changes: 14 additions & 20 deletions cmd/nfs-subdir-external-provisioner/provisioner.go
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Expand Up @@ -41,6 +41,8 @@ import (

const (
provisionerNameKey = "PROVISIONER_NAME"
defaultPathPattern = "${.PVC.namespace}-${.PVC.name}-${.PVC.pvname}"
mountPath = "/persistentvolumes"
)

type nfsProvisioner struct {
Expand Down Expand Up @@ -73,10 +75,6 @@ func (meta *pvcMetadata) stringParser(str string) string {
return str
}

const (
mountPath = "/persistentvolumes"
)

var _ controller.Provisioner = &nfsProvisioner{}

func (p *nfsProvisioner) Provision(ctx context.Context, options controller.ProvisionOptions) (*v1.PersistentVolume, controller.ProvisioningState, error) {
Expand All @@ -85,31 +83,27 @@ func (p *nfsProvisioner) Provision(ctx context.Context, options controller.Provi
}
glog.V(4).Infof("nfs provisioner: VolumeOptions %v", options)

pvcNamespace := options.PVC.Namespace
pvcName := options.PVC.Name

pvName := strings.Join([]string{pvcNamespace, pvcName, options.PVName}, "-")

metadata := &pvcMetadata{
data: map[string]string{
"name": pvcName,
"namespace": pvcNamespace,
"name": options.PVC.Name,
"namespace": options.PVC.Namespace,
"pvname": options.PVName,
},
labels: options.PVC.Labels,
annotations: options.PVC.Annotations,
}

fullPath := filepath.Join(mountPath, pvName)
path := filepath.Join(p.path, pvName)

pathPattern, exists := options.StorageClass.Parameters["pathPattern"]
if exists {
customPath := metadata.stringParser(pathPattern)
if customPath != "" {
path = filepath.Join(p.path, customPath)
fullPath = filepath.Join(mountPath, customPath)
}
if !exists {
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pathPattern = defaultPathPattern
}

parsedPath := metadata.stringParser(pathPattern)
if parsedPath == "" {
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empty parsedPath means that the stringParser() necessarily failed? or pathPattern may exist but empty as well?
and what can cause stringParser to fail, pathPattern such as foo-${.nonexistingvar}? in such case stringParser() will return empty string?

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the stringParser() will return "" only if none of the patterns match. The tricky part is that if the pattern is ${.nonexisting1}-${.nonexisting1} the parsedPath will be -, and will not be captured by the error and all nfs paths will be mapped to just -

return nil, controller.ProvisioningFinished, errors.New("unable to parse pathPattern: " + pathPattern)
}
path := filepath.Join(p.path, parsedPath)
fullPath := filepath.Join(mountPath, parsedPath)

glog.V(4).Infof("creating path %s", fullPath)
if err := os.MkdirAll(fullPath, 0o777); err != nil {
Expand Down