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refact(csi): use common lib-csi imports (#263)

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Signed-off-by: shubham <shubham.bajpai@mayadata.io>
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Shubham Bajpai 2020-12-18 21:12:52 +05:30 • committed by GitHub
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/*
Copyright 2020 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package btrfs
import (
"os/exec"
"k8s.io/klog"
)
/*
* We have to generate a new UUID for the cloned volumes with btrfs filesystem
* otherwise system will mount the same volume if UUID is same. Here, since cloned
* volume refers to the same block because of the way ZFS clone works, it will
* also have the same UUID.
*/
// GenerateUUID generates a new btrfs UUID for the given device
func GenerateUUID(device string) error {
// for mounting the cloned volume for btrfs, a new UUID has to be generated
cmd := exec.Command("btrfstune", "-f", "-u", device)
out, err := cmd.CombinedOutput()
if err != nil {
klog.Errorf("btrfs: uuid generate failed for device %s error: %s", device, string(out))
return err
}
klog.Infof("btrfs: generated UUID for the device %s \n %v", device, string(out))
return nil
}

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vendor/github.com/openebs/lib-csi/pkg/client/k8s/clientset.go generated vendored Normal file
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/*
Copyright 2020 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package k8s
import (
"github.com/pkg/errors"
"k8s.io/client-go/kubernetes"
)
// ClientsetGetter abstracts fetching of kubernetes clientset
type ClientsetGetter interface {
Get() (*kubernetes.Clientset, error)
}
// ClientsetStruct is used to export a kuberneter Clientset
type ClientsetStruct struct{}
// Clientset returns a pointer to clientset struct
func Clientset() *ClientsetStruct {
return &ClientsetStruct{}
}
// Get returns a new instance of kubernetes clientset
func (c *ClientsetStruct) Get() (*kubernetes.Clientset, error) {
config, err := Config().Get()
if err != nil {
return nil, errors.Wrap(err, "failed to get kubernetes clientset")
}
return kubernetes.NewForConfig(config)
}

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/*
Copyright 2020 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package k8s
import (
"strings"
"github.com/openebs/lib-csi/pkg/common/env"
"github.com/pkg/errors"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
)
// ConfigGetter abstracts fetching of kubernetes client config
type ConfigGetter interface {
Get() (*rest.Config, error)
Name() string
}
// configFromENV is an implementation of ConfigGetter
type configFromENV struct{}
// Name returns the name of this config getter instance
func (c *configFromENV) Name() string {
return "k8s-config-from-env"
}
// Get returns kubernetes rest config based on kubernetes environment values
func (c *configFromENV) Get() (*rest.Config, error) {
k8sMaster := env.Get(env.KubeMaster)
kubeConfig := env.Get(env.KubeConfig)
if len(strings.TrimSpace(k8sMaster)) == 0 && len(strings.TrimSpace(kubeConfig)) == 0 {
return nil, errors.New("missing kubernetes master as well as kubeconfig: failed to get kubernetes client config")
}
return clientcmd.BuildConfigFromFlags(k8sMaster, kubeConfig)
}
// configFromREST is an implementation of ConfigGetter
type configFromREST struct{}
// Name returns the name of this config getter instance
func (c *configFromREST) Name() string {
return "k8s-config-from-rest"
}
// Get returns kubernetes rest config based on in-cluster config implementation
func (c *configFromREST) Get() (*rest.Config, error) {
return rest.InClusterConfig()
}
// ConfigGetters holds a list of ConfigGetter instances
//
// NOTE:
// This is an implementation of ConfigGetter
type ConfigGetters []ConfigGetter
// Name returns the name of this config getter instance
func (c ConfigGetters) Name() string {
return "list-of-k8s-config-getter"
}
// Get fetches the kubernetes client config that is used to make kubernetes API
// calls. It makes use of its list of getter instances to fetch kubernetes
// config.
func (c ConfigGetters) Get() (config *rest.Config, err error) {
var errs []error
for _, g := range c {
config, err = g.Get()
if err == nil {
return
}
errs = append(errs, errors.Wrapf(err, "failed to get kubernetes client config via %s", g.Name()))
}
// at this point; all getters have failed
err = errors.Errorf("%+v", errs)
err = errors.Wrap(err, "failed to get kubernetes client config")
return
}
// Config provides appropriate config getter instances that help in fetching
// kubernetes client config to invoke kubernetes API calls
func Config() ConfigGetter {
return ConfigGetters{&configFromENV{}, &configFromREST{}}
}

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/*
Copyright 2020 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package k8s
import (
"strings"
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
// ConfigMapGetter abstracts fetching of ConfigMap instance from kubernetes
// cluster
type ConfigMapGetter interface {
Get(options metav1.GetOptions) (*corev1.ConfigMap, error)
}
// Configmap is used to initialise a kubernetes Configmap struct
type Configmap struct {
namespace string // namespace where this configmap exists
name string // name of this configmap
}
// ConfigMap returns a new instance of configmap
func ConfigMap(namespace, name string) *Configmap {
return &Configmap{namespace: namespace, name: name}
}
// Get returns configmap instance from kubernetes cluster
func (c *Configmap) Get(options metav1.GetOptions) (cm *corev1.ConfigMap, err error) {
if len(strings.TrimSpace(c.name)) == 0 {
return nil, errors.Errorf("missing config map name: failed to get config map from namespace %s", c.namespace)
}
cs, err := Clientset().Get()
if err != nil {
return nil, errors.Wrapf(err, "failed to get config map %s %s", c.namespace, c.name)
}
return cs.CoreV1().ConfigMaps(c.namespace).Get(c.name, options)
}

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/*
Copyright 2020 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package k8s
import (
"github.com/pkg/errors"
k8sdynamic "k8s.io/client-go/dynamic"
)
// DynamicProvider abstracts providing kubernetes dynamic client interface
type DynamicProvider interface {
Provide() (k8sdynamic.Interface, error)
}
//DynamicStruct is used to initialise a kuberenets dynamic interface
type DynamicStruct struct{}
// Dynamic returns a new instance of dynamic
func Dynamic() *DynamicStruct {
return &DynamicStruct{}
}
// Provide provides a kubernetes dynamic client capable of invoking operations
// against kubernetes resources
func (d *DynamicStruct) Provide() (k8sdynamic.Interface, error) {
config, err := Config().Get()
if err != nil {
return nil, errors.Wrap(err, "failed to provide dynamic client")
}
return k8sdynamic.NewForConfig(config)
}

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vendor/github.com/openebs/lib-csi/pkg/client/k8s/k8s.go generated vendored Normal file
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/*
Copyright 2020 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package k8s
import (
"github.com/pkg/errors"
"k8s.io/apimachinery/pkg/version"
)
// GetServerVersion uses the client-go Discovery client to get the
// kubernetes version struct
func GetServerVersion() (*version.Info, error) {
cs, err := Clientset().Get()
if err != nil {
return nil, errors.Wrapf(err, "failed to get apiserver version")
}
return cs.Discovery().ServerVersion()
}

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vendor/github.com/openebs/lib-csi/pkg/client/k8s/namespace.go generated vendored Normal file
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/*
Copyright 2020 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package k8s
import (
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
// NamespaceGetter abstracts fetching of Namespace from kubernetes cluster
type NamespaceGetter interface {
Get(name string, options metav1.GetOptions) (*corev1.Namespace, error)
}
// NamespaceLister abstracts fetching of a list of namespaces from kubernetes cluster
type NamespaceLister interface {
List(options metav1.ListOptions) (*corev1.NamespaceList, error)
}
// NamespaceStruct is used to initialise kubernetes namespace instnaces
type NamespaceStruct struct{}
// Namespace returns a pointer to the namespace struct
func Namespace() *NamespaceStruct {
return &NamespaceStruct{}
}
// Get returns a namespace instance from kubernetes cluster
func (ns *NamespaceStruct) Get(name string, options metav1.GetOptions) (*corev1.Namespace, error) {
cs, err := Clientset().Get()
if err != nil {
return nil, errors.Wrapf(err, "failed to get namespace: %s", name)
}
return cs.CoreV1().Namespaces().Get(name, options)
}
// List returns a slice of namespaces defined in a Kubernetes cluster
func (ns *NamespaceStruct) List(options metav1.ListOptions) (*corev1.NamespaceList, error) {
cs, err := Clientset().Get()
if err != nil {
return nil, errors.Wrapf(err, "failed to get namespaces")
}
return cs.CoreV1().Namespaces().List(options)
}

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vendor/github.com/openebs/lib-csi/pkg/client/k8s/node.go generated vendored Normal file
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/*
Copyright 2020 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package k8s
import (
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
// NodeGetter abstracts fetching of Node details from kubernetes cluster
type NodeGetter interface {
Get(name string, options metav1.GetOptions) (*corev1.Node, error)
}
// NodeLister abstracts fetching of Nodes from kubernetes cluster
type NodeLister interface {
List(options metav1.ListOptions) (*corev1.NodeList, error)
}
//NodeStruct returns a struct used to instantiate a kubernetes Node
type NodeStruct struct{}
// Node returnd a pointer to the node struct
func Node() *NodeStruct {
return &NodeStruct{}
}
// Get returns a node instance from kubernetes cluster
func (n *NodeStruct) Get(name string, options metav1.GetOptions) (*corev1.Node, error) {
cs, err := Clientset().Get()
if err != nil {
return nil, errors.Wrapf(err, "failed to get node: %s", name)
}
return cs.CoreV1().Nodes().Get(name, options)
}
// List returns a slice of Nodes registered in a Kubernetes cluster
func (n *NodeStruct) List(options metav1.ListOptions) (*corev1.NodeList, error) {
cs, err := Clientset().Get()
if err != nil {
return nil, errors.Wrapf(err, "failed to get nodes")
}
return cs.CoreV1().Nodes().List(options)
}
// NumberOfNodes returns the number of nodes registered in a Kubernetes cluster
func NumberOfNodes() (int, error) {
n := Node()
nodes, err := n.List(metav1.ListOptions{})
if err != nil {
return 0, errors.Wrapf(err, "failed to get the number of nodes")
}
return len(nodes.Items), nil
}
// GetNode returns a node instance from kubernetes cluster
func GetNode(name string) (*corev1.Node, error) {
n := Node()
node, err := n.Get(name, metav1.GetOptions{})
if err != nil {
return nil, errors.Wrapf(err, "failed to get node")
}
return node, nil
}
// ListNodes returns list of node instance from kubernetes cluster
func ListNodes(options metav1.ListOptions) (*corev1.NodeList, error) {
n := Node()
nodelist, err := n.List(options)
if err != nil {
return nil, errors.Wrapf(err, "failed to list node")
}
return nodelist, nil
}
// GetOSAndKernelVersion gets us the OS,Kernel version
func GetOSAndKernelVersion() (string, error) {
nodes := Node()
// get a single node
firstNode, err := nodes.List(metav1.ListOptions{Limit: 1})
if err != nil {
return "unknown, unknown", errors.Wrapf(err, "failed to get the os kernel/arch")
}
nodedetails := firstNode.Items[0].Status.NodeInfo
return nodedetails.OSImage + ", " + nodedetails.KernelVersion, nil
}

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vendor/github.com/openebs/lib-csi/pkg/client/k8s/resource.go generated vendored Normal file
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/*
Copyright 2020 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// TODO
// Move this file to pkg/k8sresource/v1alpha1
package k8s
import (
"fmt"
"strings"
"github.com/pkg/errors"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/klog"
)
// ResourceCreator abstracts creating an unstructured instance in kubernetes
// cluster
type ResourceCreator interface {
Create(obj *unstructured.Unstructured, subresources ...string) (*unstructured.Unstructured, error)
}
// ResourceGetter abstracts fetching an unstructured instance from kubernetes
// cluster
type ResourceGetter interface {
Get(name string, options metav1.GetOptions, subresources ...string) (*unstructured.Unstructured, error)
}
// ResourceLister abstracts fetching an unstructured list of instance from kubernetes
// cluster
type ResourceLister interface {
List(options metav1.ListOptions) (*unstructured.UnstructuredList, error)
}
// ResourceUpdater abstracts updating an unstructured instance found in
// kubernetes cluster
type ResourceUpdater interface {
Update(oldobj, newobj *unstructured.Unstructured, subresources ...string) (u *unstructured.Unstructured, err error)
}
// ResourceApplier abstracts applying an unstructured instance that may or may
// not be available in kubernetes cluster
type ResourceApplier interface {
Apply(obj *unstructured.Unstructured, subresources ...string) (*unstructured.Unstructured, error)
}
// ResourceDeleter abstracts deletes an unstructured instance that is available in kubernetes cluster
type ResourceDeleter interface {
Delete(obj *unstructured.Unstructured, subresources ...string) error
}
// ResourceStruct is used to abstract a kubernetes struct
type ResourceStruct struct {
gvr schema.GroupVersionResource // identify a resource
namespace string // namespace where this resource is to be operated at
}
// String implements Stringer interface
func (r *ResourceStruct) String() string {
return r.gvr.String()
}
// Resource returns a new resource instance
func Resource(gvr schema.GroupVersionResource, namespace string) *ResourceStruct {
return &ResourceStruct{gvr: gvr, namespace: namespace}
}
// Create creates a new resource in kubernetes cluster
func (r *ResourceStruct) Create(obj *unstructured.Unstructured, subresources ...string) (u *unstructured.Unstructured, err error) {
if obj == nil {
err = errors.Errorf("nil resource instance: failed to create resource '%s' at '%s'", r.gvr, r.namespace)
return
}
dynamic, err := Dynamic().Provide()
if err != nil {
err = errors.Wrapf(err, "failed to create resource '%s' '%s' at '%s'", r.gvr, obj.GetName(), r.namespace)
return
}
u, err = dynamic.Resource(r.gvr).Namespace(r.namespace).Create(obj, metav1.CreateOptions{}, subresources...)
if err != nil {
err = errors.Wrapf(err, "failed to create resource '%s' '%s' at '%s'", r.gvr, obj.GetName(), r.namespace)
return
}
return
}
// Delete deletes a existing resource in kubernetes cluster
func (r *ResourceStruct) Delete(obj *unstructured.Unstructured, subresources ...string) error {
if obj == nil {
return errors.Errorf("nil resource instance: failed to delete resource '%s' at '%s'", r.gvr, r.namespace)
}
dynamic, err := Dynamic().Provide()
if err != nil {
return errors.Wrapf(err, "failed to delete resource '%s' '%s' at '%s'", r.gvr, obj.GetName(), r.namespace)
}
err = dynamic.Resource(r.gvr).Namespace(r.namespace).Delete(obj.GetName(), &metav1.DeleteOptions{})
if err != nil {
return errors.Wrapf(err, "failed to delete resource '%s' '%s' at '%s'", r.gvr, obj.GetName(), r.namespace)
}
return nil
}
// Get returns a specific resource from kubernetes cluster
func (r *ResourceStruct) Get(name string, opts metav1.GetOptions, subresources ...string) (u *unstructured.Unstructured, err error) {
if len(strings.TrimSpace(name)) == 0 {
err = errors.Errorf("missing resource name: failed to get resource '%s' at '%s'", r.gvr, r.namespace)
return
}
dynamic, err := Dynamic().Provide()
if err != nil {
err = errors.Wrapf(err, "failed to get resource '%s' '%s' at '%s'", r.gvr, name, r.namespace)
return
}
u, err = dynamic.Resource(r.gvr).Namespace(r.namespace).Get(name, opts, subresources...)
if err != nil {
err = errors.Wrapf(err, "failed to get resource '%s' '%s' at '%s'", r.gvr, name, r.namespace)
return
}
return
}
// Update updates the resource at kubernetes cluster
func (r *ResourceStruct) Update(oldobj, newobj *unstructured.Unstructured, subresources ...string) (u *unstructured.Unstructured, err error) {
if oldobj == nil {
err = errors.Errorf("nil old resource instance: failed to update resource '%s' at '%s'", r.gvr, r.namespace)
return
}
if newobj == nil {
err = errors.Errorf("nil new resource instance: failed to update resource '%s' at '%s'", r.gvr, r.namespace)
return
}
dynamic, err := Dynamic().Provide()
if err != nil {
err = errors.Wrapf(err, "failed to update resource '%s' '%s' at '%s'", r.gvr, oldobj.GetName(), r.namespace)
return
}
resourceVersion := oldobj.GetResourceVersion()
newobj.SetResourceVersion(resourceVersion)
u, err = dynamic.Resource(r.gvr).Namespace(r.namespace).Update(newobj, metav1.UpdateOptions{}, subresources...)
if err != nil {
err = errors.Wrapf(err, "failed to update resource '%s' '%s' at '%s'", r.gvr, oldobj.GetName(), r.namespace)
return
}
return
}
// List returns a list of specific resource at kubernetes cluster
func (r *ResourceStruct) List(opts metav1.ListOptions) (u *unstructured.UnstructuredList, err error) {
dynamic, err := Dynamic().Provide()
if err != nil {
err = errors.Wrapf(err, "failed to list resource '%s' at '%s'", r.gvr, r.namespace)
return
}
u, err = dynamic.Resource(r.gvr).Namespace(r.namespace).List(opts)
if err != nil {
err = errors.Wrapf(err, "failed to list resource '%s' at '%s'", r.gvr, r.namespace)
return
}
return
}
// ResourceCreateOrUpdater as the name suggests manages to either
// create or update a given resource. It does so by implementing
// ResourceApplier interface
type ResourceCreateOrUpdater struct {
*ResourceStruct
// Various executors required to perform Apply
// This is how this instance decouples its dependencies
Getter ResourceGetter
Creator ResourceCreator
Updater ResourceUpdater
// IsSkipUpdate will not update this resource if set to true.
// In other words, enabling this flag can only create the
// resource in the cluster if not created previously
IsSkipUpdate bool
}
// ResourceCreateOrUpdaterOption is a typed function used to
// build an instance of ResourceCreateOrUpdater
//
// NOTE:
// This follows the pattern known as "functional options". It
// is a function that operates on a given structure as a value
// to build (initialise, configure, sensible defaults, etc) this
// same structure.
type ResourceCreateOrUpdaterOption func(*ResourceCreateOrUpdater)
// ResourceCreateOrUpdaterSkipUpdate sets IsSkipUpdate based
// on the provided flag
func ResourceCreateOrUpdaterSkipUpdate(skip bool) ResourceCreateOrUpdaterOption {
return func(r *ResourceCreateOrUpdater) {
r.IsSkipUpdate = skip
}
}
// NewResourceCreateOrUpdater returns a new instance of
// ResourceCreateOrUpdater
func NewResourceCreateOrUpdater(
gvr schema.GroupVersionResource,
namespace string,
options ...ResourceCreateOrUpdaterOption,
) *ResourceCreateOrUpdater {
resource := Resource(gvr, namespace)
t := &ResourceCreateOrUpdater{
ResourceStruct: resource,
Getter: resource,
Creator: resource,
Updater: resource,
}
for _, o := range options {
o(t)
}
return t
}
// String implements Stringer interface
func (r *ResourceCreateOrUpdater) String() string {
if r.ResourceStruct == nil {
return "ResourceCreateOrUpdater"
}
return fmt.Sprintf("ResourceCreateOrUpdater %s", r.ResourceStruct)
}
// Apply applies a resource to the kubernetes cluster. In other words, it
// creates a new resource if it does not exist or updates the existing
// resource.
func (r *ResourceCreateOrUpdater) Apply(
obj *unstructured.Unstructured,
subresources ...string,
) (resource *unstructured.Unstructured, err error) {
if r.Getter == nil {
err = errors.Errorf("%s: Apply failed: Nil getter", r)
return
}
if r.Creator == nil {
err = errors.Errorf("%s: Apply failed: Nil creator", r)
return
}
if r.Updater == nil {
err = errors.Errorf("%s: Apply failed: Nil updater", r)
return
}
if obj == nil {
err = errors.Errorf("%s: Apply failed: Nil resource", r)
return
}
resource, err = r.Getter.Get(obj.GetName(), metav1.GetOptions{})
if err != nil {
if apierrors.IsNotFound(errors.Cause(err)) {
return r.Creator.Create(obj, subresources...)
}
return nil, err
}
if r.IsSkipUpdate {
klog.V(2).Infof("%s: Skipping update", r)
return resource, nil
}
return r.Updater.Update(resource, obj, subresources...)
}
// ResourceDeleteOptions is a utility instance used during the resource's delete operations
type ResourceDeleteOptions struct {
Deleter ResourceDeleter
}
// Delete is a resource that is suitable to be executed as a Delete operation
type Delete struct {
*ResourceStruct
options ResourceDeleteOptions
}
// DeleteResource returns a new instance of delete resource
func DeleteResource(gvr schema.GroupVersionResource, namespace string) *Delete {
resource := Resource(gvr, namespace)
options := ResourceDeleteOptions{Deleter: resource}
return &Delete{ResourceStruct: resource, options: options}
}
// Delete deletes a resource from a kubernetes cluster
func (d *Delete) Delete(obj *unstructured.Unstructured, subresources ...string) error {
if d.options.Deleter == nil {
return errors.New("nil resource deleter instance: failed to delete resource")
} else if obj == nil {
return errors.New("nil resource instance: failed to delete resource")
}
return d.options.Deleter.Delete(obj, subresources...)
}
// ResourceListOptions is a utility instance used during the resource's list operations
type ResourceListOptions struct {
Lister ResourceLister
}
// List is a resource resource that is suitable to be executed as a List operation
type List struct {
*ResourceStruct
options ResourceListOptions
}
// ListResource returns a new instance of list resource
func ListResource(gvr schema.GroupVersionResource, namespace string) *List {
resource := Resource(gvr, namespace)
options := ResourceListOptions{Lister: resource}
return &List{ResourceStruct: resource, options: options}
}
// List lists a resource from a kubernetes cluster
func (l *List) List(options metav1.ListOptions) (u *unstructured.UnstructuredList, err error) {
if l.options.Lister == nil {
err = errors.New("nil resource lister instance: failed to list resource")
return
}
return l.options.Lister.List(options)
}
// ResourceGetOptions is a utility instance used during the resource's get operations
type ResourceGetOptions struct {
Getter ResourceGetter
}
// Get is resource that is suitable to be executed as Get operation
type Get struct {
*ResourceStruct
options ResourceGetOptions
}
// GetResource returns a new instance of get resource
func GetResource(gvr schema.GroupVersionResource, namespace string) *Get {
resource := Resource(gvr, namespace)
options := ResourceGetOptions{Getter: resource}
return &Get{ResourceStruct: resource, options: options}
}
// Get gets a resource from a kubernetes cluster
func (g *Get) Get(name string, opts metav1.GetOptions, subresources ...string) (u *unstructured.Unstructured, err error) {
if g.options.Getter == nil {
err = errors.New("nil resource getter instance: failed to get resource")
return
}
return g.options.Getter.Get(name, opts, subresources...)
}

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/*
Copyright 2019 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package env
import (
"os"
"strconv"
"strings"
)
const (
// KubeConfig is the ENV variable to fetch kubernetes kubeconfig
KubeConfig = "OPENEBS_IO_KUBE_CONFIG"
// KubeMaster is the ENV variable to fetch kubernetes master's address
KubeMaster = "OPENEBS_IO_K8S_MASTER"
)
// EnvironmentSetter abstracts setting of environment variable
type EnvironmentSetter func(envKey string, value string) (err error)
// EnvironmentGetter abstracts fetching value from an environment variable
type EnvironmentGetter func(envKey string) (value string)
// EnvironmentLookup abstracts looking up an environment variable
type EnvironmentLookup func(envKey string) (value string, present bool)
// Set sets the provided environment variable
//
// NOTE:
// This is an implementation of EnvironmentSetter
func Set(envKey string, value string) (err error) {
return os.Setenv(string(envKey), value)
}
// Get fetches value from the provided environment variable
//
// NOTE:
// This is an implementation of EnvironmentGetter
func Get(envKey string) (value string) {
return getEnv(string(envKey))
}
// GetOrDefault fetches value from the provided environment variable
// which on empty returns the defaultValue
// NOTE: os.Getenv is used here instead of os.LookupEnv because it is
// not required to know if the environment variable is defined on the system
func GetOrDefault(e string, defaultValue string) (value string) {
envValue := Get(e)
if len(envValue) == 0 {
// ENV not defined or set to ""
return defaultValue
}
return envValue
}
// Lookup looks up an environment variable
//
// NOTE:
// This is an implementation of EnvironmentLookup
func Lookup(envKey string) (value string, present bool) {
return lookupEnv(string(envKey))
}
// Truthy returns boolean based on the environment variable's value
//
// The lookup value can be truthy (i.e. 1, t, TRUE, true) or falsy (0, false,
// etc) based on strconv.ParseBool logic
func Truthy(envKey string) (truth bool) {
v, found := Lookup(envKey)
if !found {
return
}
truth, _ = strconv.ParseBool(v)
return
}
// LookupOrFalse looks up an environment variable and returns a string "false"
// if environment variable is not present. It returns appropriate values for
// other cases.
func LookupOrFalse(envKey string) string {
val, present := Lookup(envKey)
if !present {
return "false"
}
return strings.TrimSpace(val)
}
// getEnv fetches the provided environment variable's value
func getEnv(envKey string) (value string) {
return strings.TrimSpace(os.Getenv(envKey))
}
// lookupEnv looks up the provided environment variable
func lookupEnv(envKey string) (value string, present bool) {
value, present = os.LookupEnv(envKey)
value = strings.TrimSpace(value)
return
}

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vendor/github.com/openebs/lib-csi/pkg/common/errors/errors.go generated vendored Normal file
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/*
Copyright 2019 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package errors
import (
"fmt"
)
// New returns an error with the supplied message.
// New also records the stack trace at the point it was called.
func New(message string) error {
return &err{
prefix: stackTraceMessagePrefix,
msg: message,
stack: callers(),
}
}
// Errorf formats according to a format specifier and returns the string
// as a value that satisfies error.
// Errorf also records the stack trace at the point it was called.
func Errorf(format string, args ...interface{}) error {
return &err{
prefix: stackTraceMessagePrefix,
msg: fmt.Sprintf(format, args...),
stack: callers(),
}
}
// Wrap annotates err with a new message.
// If err is nil, Wrap returns nil.
func Wrap(err error, message string) error {
if err == nil {
return nil
}
return &wrapper{wrapErrorMessagePrefix, message, err}
}
// Wrapf annotates err with the format specifier.
// If err is nil, Wrapf returns nil.
func Wrapf(err error, format string, args ...interface{}) error {
if err == nil {
return nil
}
return &wrapper{wrapErrorMessagePrefix, fmt.Sprintf(format, args...), err}
}
// WithStack annotates err with a stack trace at the
// point WithStack was called. If err is nil, WithStack returns nil.
func WithStack(err error) error {
if err == nil {
return nil
}
return &withStack{
stackTraceMessagePrefix,
err,
callers(),
}
}
// Cause returns the underlying cause of the error, if possible.
// An error value has a cause if it implements the following
// interface:
//
// type causer interface {
// Cause() error
// }
//
// If the error does not implement Cause, the original error will
// be returned. If the error is nil, nil will be returned without further
// investigation.
func Cause(err error) error {
type causer interface {
Cause() error
}
for err != nil {
cause, ok := err.(causer)
if !ok {
break
}
err = cause.Cause()
}
return err
}

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vendor/github.com/openebs/lib-csi/pkg/common/errors/types.go generated vendored Normal file
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/*
Copyright 2019 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package errors
import (
"fmt"
"runtime"
"github.com/pkg/errors"
)
const (
wrapErrorMessagePrefix string = " -- "
listErrorMessagePrefix string = " - "
stackTraceMessagePrefix string = " "
)
// stack represents a stack of program counters.
type stack []uintptr
// callers returns stack of caller function
func callers() *stack {
const depth = 32
var pcs [depth]uintptr
n := runtime.Callers(3, pcs[:])
var st stack = pcs[0:n]
return &st
}
// err implements error interface that has a message and stack
type err struct {
prefix string
msg string
*stack
}
// Error is implementation of error interface
func (e *err) Error() string { return e.msg }
// Format is implementation of Formater interface
func (e *err) Format(s fmt.State, verb rune) {
message := wrapErrorMessagePrefix + e.msg
switch verb {
case 'v':
if s.Flag('+') {
fmt.Fprint(s, message)
for i, pc := range *e.stack {
if i > 0 {
return
}
f := errors.Frame(pc)
fmt.Fprintf(s, "\n%s%+v", e.prefix, f)
}
return
}
fallthrough
case 's', 'q':
fmt.Fprint(s, message)
}
}
// wrapper implements error interface that has a message and error
type wrapper struct {
prefix string
msg string
error
}
// Error is implementation of error interface
func (w *wrapper) Error() string { return w.msg }
// Cause is implementation of causer interface
func (w *wrapper) Cause() error { return w.error }
// Format is implementation of Formater interface
func (w *wrapper) Format(s fmt.State, verb rune) {
switch verb {
case 'v':
if s.Flag('+') {
fmt.Fprintf(s, "%+v\n", w.error)
fmt.Fprint(s, w.prefix+w.msg)
return
}
fallthrough
case 's', 'q':
fmt.Fprintf(s, "%s\n", w.error)
fmt.Fprint(s, w.prefix+w.msg)
}
}
// withStack implements error interface that has a stack and error
type withStack struct {
prefix string
error
*stack
}
// Format is implementation of Formater interface
func (ws *withStack) Format(s fmt.State, verb rune) {
message := wrapErrorMessagePrefix + fmt.Sprintf("%s", ws.error)
switch verb {
case 'v':
if s.Flag('+') {
fmt.Fprint(s, message)
for i, pc := range *ws.stack {
if i > 0 {
return
}
f := errors.Frame(pc)
fmt.Fprintf(s, "\n%s%+v", ws.prefix, f)
}
return
}
fallthrough
case 's', 'q':
fmt.Fprint(s, message)
}
}
// Cause is implementation of causer interface
func (ws *withStack) Cause() error { return ws.error }
// ErrorList is a wrapper over list of errors
// It implements error interface
type ErrorList struct {
Errors []error
msg string
}
// Error is implementation of error interface
func (el *ErrorList) Error() string {
message := ""
for _, err := range el.Errors {
message += err.Error() + ":"
}
el.msg = message
return message
}
// Format is implementation of Formater interface
func (el *ErrorList) Format(s fmt.State, verb rune) {
message := ""
for _, err := range el.Errors {
message += "\n" + listErrorMessagePrefix + err.Error()
}
fmt.Fprint(s, message)
}
// WithStack annotates ErrorList with a new message and
// stack trace of caller.
func (el *ErrorList) WithStack(message string) error {
if el == nil {
return nil
}
return &withStack{
stackTraceMessagePrefix,
Wrap(el, message),
callers(),
}
}
// WithStackf annotates ErrorList with the format specifier
// and stack trace of caller.
func (el *ErrorList) WithStackf(format string, args ...interface{}) error {
if el == nil {
return nil
}
return &withStack{
stackTraceMessagePrefix,
Wrapf(el, format, args...),
callers(),
}
}

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vendor/github.com/openebs/lib-csi/pkg/common/helpers/helpers.go generated vendored Normal file
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/*
Copyright 2020 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package helpers
import (
"strings"
)
// GetCaseInsensitiveMap coercs the map's keys to lower case, which only works
// when unicode char is in ASCII subset. May overwrite key-value pairs on
// different permutations of key case as in Key and key. DON'T force values to the
// lower case unconditionally, because values for keys such as mountpoint or
// keylocation are case-sensitive.
// Note that although keys such as 'comPREssion' are accepted and processed,
// even if they are technically invalid, updates to rectify such typing will be
// prohibited as a forbidden update.
func GetCaseInsensitiveMap(dict *map[string]string) map[string]string {
insensitiveDict := map[string]string{}
for k, v := range *dict {
insensitiveDict[strings.ToLower(k)] = v
}
return insensitiveDict
}
// GetInsensitiveParameter handles special case ofGetCaseInsensitiveMap looking up one
// key-value pair only
func GetInsensitiveParameter(dict *map[string]string, key string) string {
insensitiveDict := GetCaseInsensitiveMap(dict)
return insensitiveDict[strings.ToLower(key)]
}

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vendor/github.com/openebs/lib-csi/pkg/common/kubernetes/client/client.go generated vendored Normal file
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/*
Copyright 2019 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package client
import (
"strings"
"sync"
env "github.com/openebs/lib-csi/pkg/common/env"
"github.com/pkg/errors"
"k8s.io/client-go/dynamic"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
)
// getInClusterConfigFunc abstracts the logic to get
// kubernetes incluster config
//
// NOTE:
// typed function makes it simple to mock
type getInClusterConfigFunc func() (*rest.Config, error)
// buildConfigFromFlagsFunc provides the abstraction to get
// kubernetes config from provided flags
//
// NOTE:
// typed function makes it simple to mock
type buildConfigFromFlagsFunc func(string, string) (*rest.Config, error)
// GetConfigFunc provides the abstraction to get
// kubernetes config from provided client instance
//
// NOTE:
// typed function makes it simple to mock
type GetConfigFunc func(*Client) (*rest.Config, error)
// GetConfig returns kubernetes config instance
//
// NOTE:
// This is an implementation of GetConfigFunc
func GetConfig(c *Client) (*rest.Config, error) {
if c == nil {
return nil, errors.New("failed to get kubernetes config: nil client was provided")
}
return c.GetConfigForPathOrDirect()
}
// getKubeMasterIPFunc provides the abstraction to get
// kubernetes master IP address
//
// NOTE:
// typed function makes it simple to mock
type getKubeMasterIPFunc func(string) string
// getKubeConfigPathFunc provides the abstraction to get
// kubernetes config path
//
// NOTE:
// typed function makes it simple to mock
type getKubeConfigPathFunc func(string) string
// getKubernetesDynamicClientFunc provides the abstraction to get
// dynamic kubernetes clientset
//
// NOTE:
// typed function makes it simple to mock
type getKubernetesDynamicClientFunc func(*rest.Config) (dynamic.Interface, error)
// getKubernetesClientsetFunc provides the abstraction to get
// kubernetes clientset
//
// NOTE:
// typed function makes it simple to mock
type getKubernetesClientsetFunc func(*rest.Config) (*kubernetes.Clientset, error)
// Client provides common kuberenetes client operations
type Client struct {
IsInCluster bool // flag to let client point to its own cluster
KubeConfigPath string // kubeconfig path to get kubernetes clientset
// Below functions are useful during mock
// handle to get in cluster config
getInClusterConfig getInClusterConfigFunc
// handle to get desired kubernetes config
buildConfigFromFlags buildConfigFromFlagsFunc
// handle to get kubernetes clienset
getKubernetesClientset getKubernetesClientsetFunc
// handle to get dynamic kubernetes clientset
getKubernetesDynamicClient getKubernetesDynamicClientFunc
// handle to get kubernetes master IP
getKubeMasterIP getKubeMasterIPFunc
// handle to get kubernetes config path
getKubeConfigPath getKubeConfigPathFunc
}
// OptionFunc is a typed function that abstracts any kind of operation
// against the provided client instance
//
// This is the basic building block to create functional operations
// against the client instance
type OptionFunc func(*Client)
// New returns a new instance of client
func New(opts ...OptionFunc) *Client {
c := &Client{}
for _, o := range opts {
o(c)
}
withDefaults(c)
return c
}
var (
instance *Client
once sync.Once
)
// Instance returns a singleton instance of
// this client
func Instance(opts ...OptionFunc) *Client {
once.Do(func() {
instance = New(opts...)
})
return instance
}
func withDefaults(c *Client) {
if c.getInClusterConfig == nil {
c.getInClusterConfig = rest.InClusterConfig
}
if c.buildConfigFromFlags == nil {
c.buildConfigFromFlags = clientcmd.BuildConfigFromFlags
}
if c.getKubernetesClientset == nil {
c.getKubernetesClientset = kubernetes.NewForConfig
}
if c.getKubernetesDynamicClient == nil {
c.getKubernetesDynamicClient = dynamic.NewForConfig
}
if c.getKubeMasterIP == nil {
c.getKubeMasterIP = env.Get
}
if c.getKubeConfigPath == nil {
c.getKubeConfigPath = env.Get
}
}
// InCluster enables IsInCluster flag
func InCluster() OptionFunc {
return func(c *Client) {
c.IsInCluster = true
}
}
// WithKubeConfigPath sets kubeconfig path
// against this client instance
func WithKubeConfigPath(kubeConfigPath string) OptionFunc {
return func(c *Client) {
c.KubeConfigPath = kubeConfigPath
}
}
// Clientset returns a new instance of kubernetes clientset
func (c *Client) Clientset() (*kubernetes.Clientset, error) {
config, err := c.GetConfigForPathOrDirect()
if err != nil {
return nil, errors.Wrapf(err,
"failed to get kubernetes clientset: failed to get kubernetes config: IsInCluster {%t}: KubeConfigPath {%s}",
c.IsInCluster,
c.KubeConfigPath,
)
}
return c.getKubernetesClientset(config)
}
// Config returns the kubernetes config instance based on available criteria
func (c *Client) Config() (config *rest.Config, err error) {
// IsInCluster flag holds the top most priority
if c.IsInCluster {
return c.getInClusterConfig()
}
// ENV holds second priority
if strings.TrimSpace(c.getKubeMasterIP(env.KubeMaster)) != "" ||
strings.TrimSpace(c.getKubeConfigPath(env.KubeConfig)) != "" {
return c.getConfigFromENV()
}
// Defaults to InClusterConfig
return c.getInClusterConfig()
}
// ConfigForPath returns the kubernetes config instance based on KubeConfig path
func (c *Client) ConfigForPath(kubeConfigPath string) (config *rest.Config, err error) {
return c.buildConfigFromFlags("", kubeConfigPath)
}
// GetConfigForPathOrDirect returns the kubernetes config instance based on direct KubeConfig
func (c *Client) GetConfigForPathOrDirect() (config *rest.Config, err error) {
if c.KubeConfigPath != "" {
return c.ConfigForPath(c.KubeConfigPath)
}
return c.Config()
}
func (c *Client) getConfigFromENV() (config *rest.Config, err error) {
k8sMaster := c.getKubeMasterIP(env.KubeMaster)
kubeConfig := c.getKubeConfigPath(env.KubeConfig)
if strings.TrimSpace(k8sMaster) == "" &&
strings.TrimSpace(kubeConfig) == "" {
return nil, errors.Errorf(
"failed to get kubernetes config: missing ENV: atleast one should be set: {%s} or {%s}",
env.KubeMaster,
env.KubeConfig,
)
}
return c.buildConfigFromFlags(k8sMaster, kubeConfig)
}
// Dynamic returns a kubernetes dynamic client capable of invoking operations
// against kubernetes resources
func (c *Client) Dynamic() (dynamic.Interface, error) {
config, err := c.GetConfigForPathOrDirect()
if err != nil {
return nil, errors.Wrap(err, "failed to get dynamic client")
}
return c.getKubernetesDynamicClient(config)
}

64
vendor/github.com/openebs/lib-csi/pkg/mount/mount_utils.go generated vendored Normal file
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/*
Copyright 2020 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package mount
import (
"k8s.io/kubernetes/pkg/util/mount"
)
// GetMounts gets mountpoints for the specified volume
func GetMounts(dev string) ([]string, error) {
var (
currentMounts []string
err error
mountList []mount.MountPoint
)
mounter := mount.New("")
// Get list of mounted paths present with the node
if mountList, err = mounter.List(); err != nil {
return nil, err
}
for _, mntInfo := range mountList {
if mntInfo.Device == dev {
currentMounts = append(currentMounts, mntInfo.Path)
}
}
return currentMounts, nil
}
// IsMountPath returns true if path is a mount path
func IsMountPath(path string) bool {
var (
err error
mountList []mount.MountPoint
)
mounter := mount.New("")
// Get list of mounted paths present with the node
if mountList, err = mounter.List(); err != nil {
return false
}
for _, mntInfo := range mountList {
if mntInfo.Path == path {
return true
}
}
return false
}

99
vendor/github.com/openebs/lib-csi/pkg/scheduler/scheduler.go generated vendored Normal file
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/*
Copyright © 2019 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package scheduler
import (
"math"
"github.com/container-storage-interface/spec/lib/go/csi"
k8sapi "github.com/openebs/lib-csi/pkg/client/k8s"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/klog"
)
// getNodeList gets the nodelist which satisfies the topology info
func getNodeList(topo *csi.TopologyRequirement) ([]string, error) {
var nodelist []string
list, err := k8sapi.ListNodes(metav1.ListOptions{})
if err != nil {
return nil, err
}
for _, node := range list.Items {
for _, prf := range topo.Preferred {
nodeFiltered := false
for key, value := range prf.Segments {
if node.Labels[key] != value {
nodeFiltered = true
break
}
}
if !nodeFiltered {
nodelist = append(nodelist, node.Name)
break
}
}
}
return nodelist, nil
}
// runScheduler goes through the node mapping
// in the topology and picks the node which is less weighted
func runScheduler(nodelist []string, nmap map[string]int64) string {
var selected string
var weight int64 = math.MaxInt64
// schedule it on the node which has less weight
for _, node := range nodelist {
if nmap[node] < weight {
selected = node
weight = nmap[node]
}
}
return selected
}
// Scheduler schedules the PV as per topology constraints for
// the given node weight.
func Scheduler(req *csi.CreateVolumeRequest, nmap map[string]int64) string {
topo := req.AccessibilityRequirements
if topo == nil ||
len(topo.Preferred) == 0 {
klog.Errorf("scheduler: topology information not provided")
return ""
}
nodelist, err := getNodeList(topo)
if err != nil {
klog.Errorf("scheduler: can not get the nodelist err : %v", err.Error())
return ""
} else if len(nodelist) == 0 {
klog.Errorf("scheduler: nodelist is empty")
return ""
}
// if there is a single node, schedule it on that
if len(nodelist) == 1 {
return nodelist[0]
}
return runScheduler(nodelist, nmap)
}

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vendor/github.com/openebs/lib-csi/pkg/xfs/xfs_util.go generated vendored Normal file
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/*
Copyright 2020 The OpenEBS Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package xfs
import (
"github.com/openebs/lib-csi/pkg/mount"
"os"
"os/exec"
"path/filepath"
"strings"
"k8s.io/klog"
)
func xfsTempMount(device string) error {
pvol := strings.Split(device, "/")
volname := pvol[len(pvol)-1]
// evaluate the symlink to get the dev path for volume
dev, err := filepath.EvalSymlinks(device)
if err != nil {
return err
}
// create a temporary directory to mount the xfs file system
tmpdir := "/tmp/" + volname
err = os.Mkdir(tmpdir, 0755)
if os.IsNotExist(err) {
klog.Errorf("xfs: failed to create tmpdir %s error: %s", tmpdir, err.Error())
return err
}
/*
* Device might have already mounted at the tmp path but umount might have failed
* in previous attempt. Checking here if device is not mounted then only attempt
* to mount it, otherwise proceed with the umount.
*/
curMounts, err := mount.GetMounts(dev)
if err != nil {
klog.Errorf("xfs: get mounts failed dev: %s err: %v", device, err.Error())
return err
} else if len(curMounts) == 0 {
// mount with nouuid, so that it can play the log
cmd := exec.Command("mount", "-o", "nouuid", device, tmpdir)
out, err := cmd.CombinedOutput()
if err != nil {
klog.Errorf("xfs: failed to mount device %s => %s error: %s", device, tmpdir, string(out))
return err
}
} else {
klog.Infof("xfs: device already mounted %s => [%v]", device, curMounts)
}
// log has been replayed, unmount the volume
cmd := exec.Command("umount", tmpdir)
out, err := cmd.CombinedOutput()
if err != nil {
klog.Errorf("xfs: failed to umount tmpdir %s error: %s", tmpdir, string(out))
return err
}
// remove the tmp directory
err = os.Remove(tmpdir)
if err != nil {
// don't return error, reconciliation is not needed as umount is done
klog.Errorf("xfs: failed to remove tmpdir %s error: %s", tmpdir, err.Error())
}
return nil
}
/*
* We have to generate a new UUID for the cloned volumes with xfs filesystem
* otherwise system won't let anyone mount it if UUID is same. Here, since cloned
* volume refers to the same block because of the way ZFS clone works, it will
* also have the same UUID.
* There might be something there in the xfs log, we have to clear them
* so that filesystem is clean and we can generate the UUID for it.
*/
// GenerateUUID generates a new UUID for the given device
func GenerateUUID(device string) error {
// temporary mount the volume with nouuid to replay the logs
err := xfsTempMount(device)
if err != nil {
return err
}
// for mounting the cloned volume for xfs, a new UUID has to be generated
cmd := exec.Command("xfs_admin", "-U", "generate", device)
out, err := cmd.CombinedOutput()
if err != nil {
klog.Errorf("xfs: uuid generate failed for device %s error: %s", device, string(out))
return err
}
klog.Infof("xfs: generated UUID for the device %s \n %v", device, string(out))
return nil
}