openstack: include support to metadata service

go.mod

@@ -10,6 +10,7 @@ require (
 	github.com/fsnotify/fsnotify v1.4.9
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
 	github.com/google/go-cmp v0.5.2
+	github.com/hashicorp/go-retryablehttp v0.7.0
 	github.com/intel/sriov-network-device-plugin v0.0.0-20200924101303-b7f6d3e06797
 	github.com/jaypipes/ghw v0.6.1
 	github.com/k8snetworkplumbingwg/network-attachment-definition-client v0.0.0-20200626054723-37f83d1996bc
@@ -82,6 +83,7 @@ require (
 	github.com/google/uuid v1.1.2 // indirect
 	github.com/googleapis/gnostic v0.5.1 // indirect
 	github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7 // indirect
+	github.com/hashicorp/go-cleanhttp v0.5.1 // indirect
 	github.com/hashicorp/golang-lru v0.5.4 // indirect
 	github.com/huandu/xstrings v1.3.2 // indirect
 	github.com/imdario/mergo v0.3.11 // indirect

go.sum

@@ -435,10 +435,15 @@ github.com/grpc-ecosystem/grpc-gateway v1.9.5/go.mod h1:vNeuVxBJEsws4ogUvrchl83t
 github.com/hashicorp/consul/api v1.1.0/go.mod h1:VmuI/Lkw1nC05EYQWNKwWGbkg+FbDBtguAZLlVdkD9Q=
 github.com/hashicorp/consul/sdk v0.1.1/go.mod h1:VKf9jXwCTEY1QZP2MOLRhb5i/I/ssyNV1vwHyQBF0x8=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
+github.com/hashicorp/go-cleanhttp v0.5.1 h1:dH3aiDG9Jvb5r5+bYHsikaOUIpcM0xvgMXVoDkXMzJM=
 github.com/hashicorp/go-cleanhttp v0.5.1/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
+github.com/hashicorp/go-hclog v0.9.2 h1:CG6TE5H9/JXsFWJCfoIVpKFIkFe6ysEuHirp4DxCsHI=
+github.com/hashicorp/go-hclog v0.9.2/go.mod h1:5CU+agLiy3J7N7QjHK5d05KxGsuXiQLrjA0H7acj2lQ=
 github.com/hashicorp/go-immutable-radix v1.0.0/go.mod h1:0y9vanUI8NX6FsYoO3zeMjhV/C5i9g4Q3DwcSNZ4P60=
 github.com/hashicorp/go-msgpack v0.5.3/go.mod h1:ahLV/dePpqEmjfWmKiqvPkv/twdG7iPBM1vqhUKIvfM=
 github.com/hashicorp/go-multierror v1.0.0/go.mod h1:dHtQlpGsu+cZNNAkkCN/P3hoUDHhCYQXV3UM06sGGrk=
+github.com/hashicorp/go-retryablehttp v0.7.0 h1:eu1EI/mbirUgP5C8hVsTNaGZreBDlYiwC1FZWkvQPQ4=
+github.com/hashicorp/go-retryablehttp v0.7.0/go.mod h1:vAew36LZh98gCBJNLH42IQ1ER/9wtLZZ8meHqQvEYWY=
 github.com/hashicorp/go-rootcerts v1.0.0/go.mod h1:K6zTfqpRlCUIjkwsN4Z+hiSfzSTQa6eBIzfwKfwNnHU=
 github.com/hashicorp/go-sockaddr v1.0.0/go.mod h1:7Xibr9yA9JjQq1JpNB2Vw7kxv8xerXegt+ozgdvDeDU=
 github.com/hashicorp/go-syslog v1.0.0/go.mod h1:qPfqrKkXGihmCqbJM2mZgkZGvKG1dFdvsLplgctolz4=

pkg/daemon/writer.go

@@ -49,13 +49,9 @@ func (writer *NodeStateStatusWriter) Run(stop <-chan struct{}, refresh <-chan Me
 	var err error
 
 	if platformType == utils.VirtualOpenStack {
-		writer.metaData, err = utils.ReadOpenstackMetaData()
+		writer.metaData, writer.networkData, err = utils.GetOpenstackData()
 		if err != nil {
-			glog.Errorf("Run(): failed to read OpenStack meta_data: %v", err)
-		}
-		writer.networkData, err = utils.ReadOpenstackNetworkData()
-		if err != nil {
-			glog.Errorf("Run(): failed to read OpenStack network_data: %v", err)
+			glog.Errorf("Run(): failed to get OpenStack data: %v", err)
 		}
 	}
 

pkg/utils/utils_virtual.go

@@ -4,10 +4,12 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
 	"os"
 	"strconv"
 
 	"github.com/golang/glog"
+	"github.com/hashicorp/go-retryablehttp"
 	dputils "github.com/intel/sriov-network-device-plugin/pkg/utils"
 	"github.com/jaypipes/ghw"
 	sriovnetworkv1 "github.com/k8snetworkplumbingwg/sriov-network-operator/api/v1"
@@ -42,9 +44,12 @@ var (
 )
 
 const (
-	ospMetaDataDir = "/host/var/config/openstack/2018-08-27"
-	ospNetworkData = ospMetaDataDir + "/network_data.json"
-	ospMetaData    = ospMetaDataDir + "/meta_data.json"
+	ospMetaDataDir     = "/host/var/config/openstack/2018-08-27"
+	ospMetaDataBaseUrl = "http://169.254.169.254/openstack/2018-08-27"
+	ospNetworkDataFile = ospMetaDataDir + "/network_data.json"
+	ospMetaDataFile    = ospMetaDataDir + "/meta_data.json"
+	ospNetworkDataUrl  = ospMetaDataBaseUrl + "/network_data.json"
+	ospMetaDataUrl     = ospMetaDataBaseUrl + "/meta_data.json"
 )
 
 // OSPMetaDataDevice -- Device structure within meta_data.json
@@ -93,43 +98,89 @@ type OSPNetworkData struct {
 	// Omit Services
 }
 
-// ReadOpenstackMetaData reads the meta data from the openstack metadata file
-func ReadOpenstackMetaData() (metaData *OSPMetaData, err error) {
-	glog.Infof("ReadOpenstackMetaData(): read OpenStack meta_data")
-	var f *os.File
-	f, err = os.Open(ospMetaData)
+// GetOpenstackData gets the metadata and network_data
+func GetOpenstackData() (metaData *OSPMetaData, networkData *OSPNetworkData, err error) {
+	metaData, networkData, err = getOpenstackDataFromConfigDrive()
 	if err != nil {
-		err = fmt.Errorf("error opening file %s: %w", ospMetaData, err)
+		metaData, networkData, err = getOpenstackDataFromMetadataService()
+	}
+	return metaData, networkData, err
+}
+
+// getOpenstackDataFromConfigDrive reads the meta_data and network_data files
+func getOpenstackDataFromConfigDrive() (metaData *OSPMetaData, networkData *OSPNetworkData, err error) {
+	metaData = &OSPMetaData{}
+	networkData = &OSPNetworkData{}
+	glog.Infof("reading OpenStack meta_data from config-drive")
+	var metadataf *os.File
+	metadataf, err = os.Open(ospMetaDataFile)
+	if err != nil {
+		return metaData, networkData, fmt.Errorf("error opening file %s: %w", ospMetaDataFile, err)
 	}
 	defer func() {
-		if e := f.Close(); err == nil && e != nil {
-			err = fmt.Errorf("error closing file %s: %w", ospMetaData, e)
+		if e := metadataf.Close(); err == nil && e != nil {
+			err = fmt.Errorf("error closing file %s: %w", ospMetaDataFile, e)
 		}
 	}()
-	if err = json.NewDecoder(f).Decode(&metaData); err != nil {
-		err = fmt.Errorf("error unmarshalling metadata from file %s: %w", ospMetaData, err)
+	if err = json.NewDecoder(metadataf).Decode(&metaData); err != nil {
+		return metaData, networkData, fmt.Errorf("error unmarshalling metadata from file %s: %w", ospMetaDataFile, err)
 	}
-	return metaData, err
-}
 
-// ReadOpenstackNetworkData reads the network data from the openstack metadata file
-func ReadOpenstackNetworkData() (networkData *OSPNetworkData, err error) {
-	glog.Infof("ReadOpenstackNetworkData(): read OpenStack network_data")
-	var f *os.File
-	f, err = os.Open(ospNetworkData)
+	glog.Infof("reading OpenStack network_data from config-drive")
+	var networkDataf *os.File
+	networkDataf, err = os.Open(ospNetworkDataFile)
 	if err != nil {
-		err = fmt.Errorf("error opening file %s: %w", ospNetworkData, err)
-		return
+		return metaData, networkData, fmt.Errorf("error opening file %s: %w", ospNetworkDataFile, err)
 	}
 	defer func() {
-		if e := f.Close(); err == nil && e != nil {
-			err = fmt.Errorf("error closing file %s: %w", ospNetworkData, e)
+		if e := networkDataf.Close(); err == nil && e != nil {
+			err = fmt.Errorf("error closing file %s: %w", ospNetworkDataFile, e)
 		}
 	}()
-	if err = json.NewDecoder(f).Decode(&networkData); err != nil {
-		err = fmt.Errorf("error unmarshalling metadata from file %s: %w", ospNetworkData, err)
+	if err = json.NewDecoder(networkDataf).Decode(&networkData); err != nil {
+		return metaData, networkData, fmt.Errorf("error unmarshalling metadata from file %s: %w", ospNetworkDataFile, err)
+	}
+	return metaData, networkData, err
+}
+
+func getBodyFromUrl(url string) ([]byte, error) {
+	glog.V(2).Infof("Getting body from %s", url)
+	resp, err := retryablehttp.Get(url)
+	if err != nil {
+		return nil, err
+	}
+	rawBytes, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+	return rawBytes, nil
+}
+
+// getOpenstackDataFromMetadataService fetchs the metadata and network_data from the metadata service
+func getOpenstackDataFromMetadataService() (metaData *OSPMetaData, networkData *OSPNetworkData, err error) {
+	metaData = &OSPMetaData{}
+	networkData = &OSPNetworkData{}
+	glog.Infof("getting OpenStack meta_data from metadata server")
+	metaDataRawBytes, err := getBodyFromUrl(ospMetaDataUrl)
+	if err != nil {
+		return metaData, networkData, fmt.Errorf("error getting OpenStack meta_data from %s: %v", ospMetaDataUrl, err)
+	}
+	err = json.Unmarshal(metaDataRawBytes, metaData)
+	if err != nil {
+		return metaData, networkData, fmt.Errorf("error unmarshalling raw bytes %v from %s", err, ospMetaDataUrl)
+	}
+
+	glog.Infof("getting OpenStack network_data from metadata server")
+	networkDataRawBytes, err := getBodyFromUrl(ospNetworkDataUrl)
+	if err != nil {
+		return metaData, networkData, fmt.Errorf("error getting OpenStack network_data from %s: %v", ospNetworkDataUrl, err)
+	}
+	err = json.Unmarshal(networkDataRawBytes, networkData)
+	if err != nil {
+		return metaData, networkData, fmt.Errorf("error unmarshalling raw bytes %v from %s", err, ospNetworkDataUrl)
 	}
-	return networkData, err
+	return metaData, networkData, nil
 }
 
 func parseOpenstackMetaData(pciAddr string, metaData *OSPMetaData, networkData *OSPNetworkData) (networkID string, macAddress string) {