diff --git a/README.md b/README.md index c0706b5..6779ad2 100644 --- a/README.md +++ b/README.md @@ -1,2 +1,49 @@ -# velero-plugin-swift -Swift plugin to velero backup. +# Swift plugin for Velero + +Openstack Swift plugin for velero backups. + +## Configure + +Configure velero container with swift authentication environment variables: + +```bash +export OS_AUTH_URL= +export OS_USERNAME= +export OS_PASSWORD= +export OS_REGION_NAME= + +# If you want to test with unsecure certificates +export OS_VERIFY="false" +``` + +Add plugin to velero: + +```bash +velero plugin add lirt/velero-plugin-swift:v0.1 +``` + +Change configuration of `backupstoragelocations.velero.io`: + +```yaml + spec: + objectStorage: + bucket: + provider: swift +``` + +## Test + +```bash +go test -v ./... +``` + +## Build + +```bash +# Build code +go mod tidy +go build + +# Build image +docker build --file docker/Dockerfile velero-swift:my-test-tag . +``` diff --git a/docker/Dockerfile b/docker/Dockerfile new file mode 100644 index 0000000..0e0206d --- /dev/null +++ b/docker/Dockerfile @@ -0,0 +1,17 @@ +# --- First stage +FROM golang:1.14-alpine AS build + +ARG REPOSITORY=Lirt +ARG PLUGIN=velero-plugin-swift +ENV GOPROXY=https://proxy.golang.org + +WORKDIR /go/src/github.com/${REPOSITORY}/${PLUGIN} +COPY . . +RUN CGO_ENABLED=0 go build -o /go/bin/${PLUGIN} . + +# --- Second stage +FROM alpine:3 +RUN mkdir /plugins +COPY --from=build /go/bin/${PLUGIN} /plugins/ +USER nobody:nogroup +ENTRYPOINT ["cp", "-rT", "/plugins/", "/target/"] diff --git a/docker/README.md b/docker/README.md new file mode 100644 index 0000000..f5a49a6 --- /dev/null +++ b/docker/README.md @@ -0,0 +1,42 @@ +# Supported tags and respective `Dockerfile` links + +* [`latest` (Dockerfile)](https://github.com/Lirt/velero-plugin-swift/blob/master/docker/Dockerfile) +* [`v0.1` (Dockerfile)](https://github.com/Lirt/velero-plugin-swift/blob/v0.1/docker/Dockerfile) + +# Swift plugin for Velero + +Openstack Swift plugin for velero backups. + +This image should be used as plugin for [Velero Kubernetes backup solution](https://velero.io/). + +Currently it does only backups of Kubernetes resources. Module for volume backups was not implemented yet. + +## Configure + +Configure velero container with swift authentication environment variables: + +```bash +export OS_AUTH_URL= +export OS_USERNAME= +export OS_PASSWORD= +export OS_REGION_NAME= + +# If you want to test with unsecure certificates +export OS_VERIFY="false" +``` + +Add plugin to velero: + +```bash +velero plugin add lirt/velero-plugin-swift:v0.1 +``` + +Change configuration of `backupstoragelocations.velero.io`: + +```yaml + spec: + objectStorage: + # Bucket must exist beforehand + bucket: + provider: swift +``` diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..30c2cf1 --- /dev/null +++ b/go.mod @@ -0,0 +1,12 @@ +module github.com/Lirt/velero-plugin-swift + +go 1.14 + +require ( + github.com/gophercloud/gophercloud v0.12.2 + github.com/sirupsen/logrus v1.6.0 + github.com/stretchr/testify v1.4.0 + github.com/vmware-tanzu/velero v1.4.2 +) + +replace github.com/gophercloud/gophercloud => 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v0.0.0-20190525122527-15d366b2352e/go.mod h1:wWxsB5ozmmv/SG7nM11ayaAW51xMvak/t1r0CSlcokI= +sigs.k8s.io/structured-merge-diff v1.0.1-0.20191108220359-b1b620dd3f06/go.mod h1:/ULNhyfzRopfcjskuui0cTITekDduZ7ycKN3oUT9R18= +sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o= diff --git a/main.go b/main.go new file mode 100644 index 0000000..b186f6c --- /dev/null +++ b/main.go @@ -0,0 +1,17 @@ +package main + +import ( + swift "github.com/Lirt/velero-plugin-swift/src" + "github.com/sirupsen/logrus" + veleroplugin "github.com/vmware-tanzu/velero/pkg/plugin/framework" +) + +func main() { + veleroplugin.NewServer(). + RegisterObjectStore("velero.io/swift", newSwiftObjectStore). + Serve() +} + +func newSwiftObjectStore(logger logrus.FieldLogger) (interface{}, error) { + return swift.NewObjectStore(logger), nil +} diff --git a/src/helpers.go b/src/helpers.go new file mode 100644 index 0000000..556c9e5 --- /dev/null +++ b/src/helpers.go @@ -0,0 +1,14 @@ +package swift + +import ( + "os" +) + +// GetEnv gets value from environment variable or fallbacks to default value +// This snippet is from https://stackoverflow.com/a/40326580/3323419 +func GetEnv(key, fallback string) string { + if value, ok := os.LookupEnv(key); ok { + return value + } + return fallback +} diff --git a/src/object_store.go b/src/object_store.go new file mode 100644 index 0000000..3cd5781 --- /dev/null +++ b/src/object_store.go @@ -0,0 +1,217 @@ +package swift + +import ( + "crypto/tls" + "fmt" + "io" + "net/http" + "strconv" + "time" + + "github.com/gophercloud/gophercloud" + "github.com/gophercloud/gophercloud/openstack" + "github.com/gophercloud/gophercloud/openstack/objectstorage/v1/objects" + "github.com/sirupsen/logrus" +) + +// ObjectStore is swift type that holds client and log +type ObjectStore struct { + client *gophercloud.ServiceClient + log logrus.FieldLogger +} + +// NewObjectStore instantiates a Swift ObjectStore. +func NewObjectStore(log logrus.FieldLogger) *ObjectStore { + return &ObjectStore{log: log} +} + +// Authenticate to Swift +func authenticate() (*gophercloud.ProviderClient, error) { + authOpts, err := openstack.AuthOptionsFromEnv() + if err != nil { + return nil, err + } + + pc, err := openstack.NewClient(authOpts.IdentityEndpoint) + if err != nil { + return nil, err + } + + tlsVerify, err := strconv.ParseBool(GetEnv("OS_VERIFY", "true")) + if err != nil { + return nil, fmt.Errorf("Cannot parse boolean from OS_VERIFY environment variable: %v", err) + } + + tlsconfig := &tls.Config{} + tlsconfig.InsecureSkipVerify = tlsVerify + transport := &http.Transport{TLSClientConfig: tlsconfig} + pc.HTTPClient = http.Client{ + Transport: transport, + } + + if err := openstack.Authenticate(pc, authOpts); err != nil { + return nil, err + } + + return pc, nil +} + +// Init initializes the plugin. After v0.10.0, this can be called multiple times. +func (o *ObjectStore) Init(config map[string]string) error { + o.log.Infof("ObjectStore.Init called") + + provider, err := authenticate() + if err != nil { + return fmt.Errorf("Failed to authenticate against Swift: %v", err) + } + + region := GetEnv("OS_REGION_NAME", "") + o.client, err = openstack.NewObjectStorageV1(provider, gophercloud.EndpointOpts{ + Region: region, + }) + if err != nil { + return fmt.Errorf("Failed to create Go Swift storage object: %v", err) + } + + return nil +} + +// GetObject returns body of Swift object defined by bucket name and key +func (o *ObjectStore) GetObject(bucket, key string) (io.ReadCloser, error) { + log := o.log.WithFields(logrus.Fields{ + "bucket": bucket, + "key": key, + }) + log.Infof("GetObject") + + object := objects.Download(o.client, bucket, key, nil) + if object.Err != nil { + return nil, fmt.Errorf("Failed to download contents of key %v from bucket %v: %v", key, bucket, object.Err) + } + + return object.Body, nil +} + +// PutObject uploads new object into bucket +func (o *ObjectStore) PutObject(bucket string, key string, body io.Reader) error { + log := o.log.WithFields(logrus.Fields{ + "bucket": bucket, + "key": key, + }) + log.Infof("PutObject") + + createOpts := objects.CreateOpts{ + Content: body, + } + + if _, err := objects.Create(o.client, bucket, key, createOpts).Extract(); err != nil { + return fmt.Errorf("Failed to create new object in bucket %v with key %v: %v", bucket, key, err) + } + + return nil +} + +// ObjectExists does Get operation and validates result or error to find out if object exists +func (o *ObjectStore) ObjectExists(bucket, key string) (bool, error) { + log := o.log.WithFields(logrus.Fields{ + "bucket": bucket, + "key": key, + }) + log.Infof("ObjectExists") + + result := objects.Get(o.client, bucket, key, nil) + + if result.Err != nil { + if result.Err.Error() == "Resource not found" { + log.Infof("Key %v in bucket %v doesn't exist yet.", key, bucket) + return false, nil + } + return false, fmt.Errorf("Cannot Get key %v in bucket %v: %v", key, bucket, result.Err) + } + + return true, nil +} + +// ListCommonPrefixes returns list of objects in bucket, that match specified prefix +func (o *ObjectStore) ListCommonPrefixes(bucket, prefix, delimiter string) ([]string, error) { + log := o.log.WithFields(logrus.Fields{ + "bucket": bucket, + "delimiter": delimiter, + "prefix": prefix, + }) + log.Infof("ListCommonPrefixes") + + opts := objects.ListOpts{ + Prefix: prefix, + Delimiter: delimiter, + Full: true, + } + + allPages, err := objects.List(o.client, bucket, opts).AllPages() + if err != nil { + return nil, fmt.Errorf("Failed to list objects in bucket %v: %v", bucket, err) + } + + allObjects, err := objects.ExtractInfo(allPages) + if err != nil { + return nil, fmt.Errorf("Failed to extract info from objects in bucket %v: %v", bucket, err) + } + + var objNames []string + for _, object := range allObjects { + objNames = append(objNames, object.Subdir+object.Name) + } + + return objNames, nil +} + +// ListObjects lists objects with prefix in all containers +func (o *ObjectStore) ListObjects(bucket, prefix string) ([]string, error) { + log := o.log.WithFields(logrus.Fields{ + "bucket": bucket, + "prefix": prefix, + }) + log.Infof("ListObjects") + + objects, err := o.ListCommonPrefixes(bucket, prefix, "/") + if err != nil { + return nil, fmt.Errorf("Failed to list objects from bucket %v with prefix %v: %v", bucket, prefix, err) + } + + return objects, nil +} + +// DeleteObject deletes object specified by key from bucket +func (o *ObjectStore) DeleteObject(bucket, key string) error { + log := o.log.WithFields(logrus.Fields{ + "bucket": bucket, + "key": key, + }) + log.Infof("DeleteObject") + + _, err := objects.Delete(o.client, bucket, key, nil).Extract() + if err != nil { + return fmt.Errorf("Failed to delete object with key %v in bucket %v: %v", key, bucket, err) + } + + return nil +} + +// CreateSignedURL creates temporary URL for key in bucket +func (o *ObjectStore) CreateSignedURL(bucket, key string, ttl time.Duration) (string, error) { + log := o.log.WithFields(logrus.Fields{ + "bucket": bucket, + "key": key, + }) + log.Infof("CreateSignedURL") + + url, err := objects.CreateTempURL(o.client, bucket, key, objects.CreateTempURLOpts{ + Method: http.MethodGet, + TTL: int(ttl.Seconds()), + }) + if err != nil { + return "", fmt.Errorf("Failed to create temporary URL for bucket %v with key %v: %v", bucket, key, err) + } + + return url, nil +} diff --git a/src/object_store_test.go b/src/object_store_test.go new file mode 100644 index 0000000..1ac0aa1 --- /dev/null +++ b/src/object_store_test.go @@ -0,0 +1,116 @@ +package swift + +import ( + "crypto/md5" + "fmt" + "net/http" + "strings" + "testing" + + th "github.com/gophercloud/gophercloud/testhelper" + fakeClient "github.com/gophercloud/gophercloud/testhelper/client" + "github.com/sirupsen/logrus" + "github.com/stretchr/testify/assert" +) + +func handleGetObject(t *testing.T, bucket, key string, data []byte) { + th.Mux.HandleFunc(fmt.Sprintf("/%s/%s", bucket, key), + func(w http.ResponseWriter, r *http.Request) { + th.TestMethod(t, r, http.MethodGet) + th.TestHeader(t, r, "X-Auth-Token", fakeClient.TokenID) + th.TestHeader(t, r, "Accept", "application/json") + + hash := md5.New() + hash.Write(data) + localChecksum := hash.Sum(nil) + + w.Header().Set("ETag", fmt.Sprintf("%x", localChecksum)) + w.WriteHeader(http.StatusOK) + w.Write([]byte(data)) + }) +} + +func handlePutObject(t *testing.T, bucket, key string, data []byte) { + th.Mux.HandleFunc(fmt.Sprintf("/%s/%s", bucket, key), + func(w http.ResponseWriter, r *http.Request) { + th.TestMethod(t, r, http.MethodPut) + th.TestHeader(t, r, "X-Auth-Token", fakeClient.TokenID) + th.TestHeader(t, r, "Accept", "application/json") + + hash := md5.New() + hash.Write(data) + localChecksum := hash.Sum(nil) + + w.Header().Set("ETag", fmt.Sprintf("%x", localChecksum)) + w.WriteHeader(http.StatusCreated) + }) +} + +func handleObjectExists(t *testing.T, bucket, key string) { + th.Mux.HandleFunc(fmt.Sprintf("/%s/%s", bucket, key), + func(w http.ResponseWriter, r *http.Request) { + th.TestMethod(t, r, http.MethodHead) + th.TestHeader(t, r, "X-Auth-Token", fakeClient.TokenID) + th.TestHeader(t, r, "Accept", "application/json") + + w.WriteHeader(http.StatusOK) + }) +} + +func TestPutObject(t *testing.T) { + th.SetupHTTP() + defer th.TeardownHTTP() + + bucket := "testBucket" + key := "testKey" + content := "All code is guilty until proven innocent" + handlePutObject(t, bucket, key, []byte(content)) + + store := ObjectStore{ + client: fakeClient.ServiceClient(), + log: logrus.New(), + } + err := store.PutObject(bucket, key, strings.NewReader(content)) + assert.Nil(t, err) +} + +func TestGetObject(t *testing.T) { + th.SetupHTTP() + defer th.TeardownHTTP() + + bucket := "testBucket" + key := "testKey" + content := "All code is guilty until proven innocent" + handleGetObject(t, bucket, key, []byte(content)) + + store := ObjectStore{ + client: fakeClient.ServiceClient(), + log: logrus.New(), + } + readCloser, err := store.GetObject(bucket, key) + + if !assert.Nil(t, err) { + t.FailNow() + } + defer readCloser.Close() +} + +func TestObjectExists(t *testing.T) { + th.SetupHTTP() + defer th.TeardownHTTP() + + bucket := "testBucket" + key := "testKey" + handleObjectExists(t, bucket, key) + + store := ObjectStore{ + client: fakeClient.ServiceClient(), + log: logrus.New(), + } + + _, err := store.ObjectExists(bucket, key) + + if !assert.Nil(t, err) { + t.FailNow() + } +}