Able to fetch details about VM from azure using object mentioned here: https://pkg.go.dev/github.com/Azure/azure-sdk-for-go/services/compute/mgmt/2021-03-01/compute#v55.0.0+incompatible#VirtualMachine
Not able to fetch the privateIPAddress for that VM or can't find way to do it. What would be the way to fetch private ip address for any given vm.
The IP address is associated with IP configurations of the network interface for the Azure VM, you could find the privateIPAddress for that VM from the network Package.
You may get reference from type InterfaceIPConfigurationsClientAPI or type IPConfigurationPropertiesFormat
Here is a good example that worked for me:
Ref: https://github.com/Azure/azure-sdk-for-go/issues/18705#issuecomment-1196930026
ctx := context.Background()
// assumes you authenicated on the command line with `az login`
cred, err := azidentity.NewDefaultAzureCredential(&azidentity.DefaultAzureCredentialOptions{})
if err != nil {
fmt.Println(err)
}
vmClient, err := armcompute.NewVirtualMachinesClient(subscriptionID, cred, nil)
if err != nil {
fmt.Println(err)
}
nicClient, err := armnetwork.NewInterfacesClient(subscriptionID, cred, nil)
if err != nil {
fmt.Println(err)
}
vm, err := vmClient.Get(ctx, "yourResourceGrp", "yourVmName", nil)
if err != nil {
fmt.Println(err)
}
for _, nicRef := range vm.Properties.NetworkProfile.NetworkInterfaces {
nicID, err := arm.ParseResourceID(*nicRef.ID)
if err != nil {
fmt.Println(err)
}
nic, err := nicClient.Get(ctx, nicID.ResourceGroupName, nicID.Name, nil)
if err != nil {
fmt.Println(err)
}
for _, ipCfg := range nic.Properties.IPConfigurations {
if ipCfg.Properties.PublicIPAddress != nil &&
ipCfg.Properties.PublicIPAddress.Properties != nil {
publicIP := *ipCfg.Properties.PublicIPAddress.Properties.IPAddress
fmt.Println("publicIP:", publicIP)
}
if ipCfg.Properties.PrivateIPAddress != nil {
privateIP := *ipCfg.Properties.PrivateIPAddress
log.Println("privateIP:", privateIP)
}
}
}
Related
I am using our go library (it could be changed if necessary) with a folder named "devops", which contains nested content.
in the library, I copy the devops folder with his content, to another folder.
this is the copy function:
func CopyDirectory(scrDir, dest string) error { // scrDir = devops
entries, err := ioutil.ReadDir(scrDir)
if err != nil {
return err
}
for _, entry := range entries {
sourcePath := filepath.Join(scrDir, entry.Name())
destPath := filepath.Join(dest, entry.Name())
fileInfo, err := os.Stat(sourcePath)
fmt.Println(fileInfo)
if err != nil {
return err
}
stat, ok := fileInfo.Sys().(*syscall.Stat_t)
if !ok {
return fmt.Errorf("failed to get raw syscall.Stat_t data for '%s'", sourcePath)
}
switch fileInfo.Mode() & os.ModeType {
case os.ModeDir:
if err := CreateIfNotExists(destPath, 0755); err != nil { // CreateIfNotExists is a internal function
return err
}
if err := CopyDirectory(sourcePath, destPath); err != nil { // CopyDirectory is a internal function
return err
}
case os.ModeSymlink:
if err := CopySymLink(sourcePath, destPath); err != nil { // CopySymLink is a internal function
return err
}
default:
if err := Copy(sourcePath, destPath); err != nil { // Copy is a internal function
return err
}
}
if err := os.Lchown(destPath, int(stat.Uid), int(stat.Gid)); err != nil {
return err
}
isSymlink := entry.Mode()&os.ModeSymlink != 0
if !isSymlink {
if err := os.Chmod(destPath, entry.Mode()); err != nil {
return err
}
}
}
return nil
}
the library runs well as self-running, but when I use it from another project, it tries to copy the devops folder from the project path, and of course, fails.
I tried doing it with embed pkg, but the code fails when calling
fileInfo.Sys().(*syscall.Stat_t)
with an error that doesn't give any details.
this is the my code:
//go:embed devops
var f embed.FS
...
dir, _ := f.ReadDir("devops")
for _, entry := range dir {
fileInfo, _ := entry.Info()
err, ok := fileInfo.Sys().(*syscall.Stat_t)
if !ok {
println(err) // prints 0x0
}
}
How to solve it?
P.S. the code runs in Linux OS.
i am trying to use the hyperledger go sdk by importing on
of the module
https://godoc.org/github.com/hyperledger/fabric-sdk-go/pkg/client/msp .
I want to create the CA client instance by using hyperledger fabric go-sdk, which module do i need to import and how to do it, could anyone please suggest?
I am using below cmd to generate the fabric server CA client config file.
./bin/fabric-ca-client enroll admin:adminpws localhost:7054
Below is the code, which create the fabric sdk context, using the fabric-ca-client.yaml file which is generated by using the above cmd. if i am doing anything wrong let me know.
package main
import (
"fmt"
"net"
"os"
"path/filepath"
"strings"
clientmsp "github.com/hyperledger/fabric-sdk-go/pkg/client/msp"
"github.com/hyperledger/fabric-sdk-go/pkg/common/providers/core"
mspid "github.com/hyperledger/fabric-sdk-go/pkg/common/providers/msp"
"github.com/hyperledger/fabric-sdk-go/pkg/core/config"
"github.com/hyperledger/fabric-sdk-go/pkg/core/cryptosuite"
"github.com/hyperledger/fabric-sdk-go/pkg/fabsdk"
"github.com/hyperledger/fabric-sdk-go/pkg/msp"
"github.com/hyperledger/fabric-sdk-go/pkg/msp/test/mockmsp"
)
var (DefaultHome = os.ExpandEnv("$PWD/CONFIG"))
var caServerURL string
var caServer = &mockmsp.MockFabricCAServer{}
const (
caServerURLListen = "http://localhost:7054"
configFile = "fabric-ca-server-config.yaml"
)
type nwConfig struct {
CertificateAuthorities map[string]msp.CAConfig
}
type clientFixture struct {
cryptoSuiteConfig core.CryptoSuiteConfig
identityConfig mspid.IdentityConfig
}
func main() {
// Initiate the sdk using the config file
client := clientFixture{}
sdk := client.setup()
//create the CA instance
c, err := clientmsp.New(sdk.Context())
if err != nil {
fmt.Println("failed to create msp client", err)
return
}
fmt.Println("New client instance created", c)
}
func (f *clientFixture) setup() *fabsdk.FabricSDK {
var lis net.Listener
var err error
if !caServer.Running() {
lis, err = net.Listen("tcp", strings.TrimPrefix(caServerURLListen,
"http://"))
if err != nil {
panic(fmt.Sprintf("Error starting CA Server %s", err))
}
caServerURL = "http://" + lis.Addr().String()
}
configPath := filepath.Join(DefaultHome, configFile)
backend, err := config.FromFile(configPath)()
if err != nil {
fmt.Println(err)
}
configProvider := func() ([]core.ConfigBackend, error) {
return backend, nil
}
// Instantiate the SDK
sdk, err := fabsdk.New(configProvider)
if err != nil {
fmt.Println(err)
}
configBackend, err := sdk.Config()
if err != nil {
panic(fmt.Sprintf("Failed to get config: %s", err))
}
f.cryptoSuiteConfig = cryptosuite.ConfigFromBackend(configBackend)
f.identityConfig, _ = msp.ConfigFromBackend(configBackend)
if err != nil {
fmt.Println(err)
}
ctxProvider := sdk.Context()
ctx, err := ctxProvider()
if err != nil {
fmt.Println(err)
}
// Start Http Server if it's not running
if !caServer.Running() {
caServer.Start(lis, ctx.CryptoSuite())
}
return sdk
}
import mspclient
mspclient "github.com/hyperledger/fabric-sdk-go/pkg/client/msp"
"github.com/hyperledger/fabric-sdk-go/pkg/fabsdk"
mspClient, err := mspclient.New(
*fabsdk.FabricSDK.Context(),
mspclient.WithOrg(OrgName),
)
if err != nil {
return mspClient, errors.WithMessage(err, "failed to create MSP client")
}
After that you can use below services
err = mspClient.Enroll("Admin#org1",
msp.WithSecret("Admin#org1"),
msp.WithProfile("tls"),
)
if err != nil {
return errors.WithMessage(err, "failed to register identity")
}
I am trying to upload a video to azure media services, but once i create the asset and then upload the video to blob with the SAS url, the asset does not contain the video.
main.go
func main() {
assetName := "sample1"
asset, err := azureMedia.CreateAsset(assetName)
if err != nil {
panic(err)
}
log.Println("Asset Name: ", *asset.Name)
sasURL, err := azureMedia.GetStorageURLForAsset(assetName)
if err != nil {
panic(err)
}
log.Println(sasURL)
err = storage.UploadToBlobFromSASUrl(sasURL)
if err != nil {
panic(err)
}
return
}
media_services.go
func CreateAsset(assetName string) (*media.Asset, error) {
asset, err := assetsClient.CreateOrUpdate(context.Background(), resourceGroupName, accountName, assetName, media.Asset{})
if err != nil {
panic(err)
}
return &asset, nil
}
func GetStorageURLForAsset(assetName string) (string, error) {
result, err := assetsClient.ListContainerSas(context.Background(), resourceGroupName, accountName, assetName, media.ListContainerSasInput{
ExpiryTime: &date.Time{Time: time.Now().Add(time.Hour * 4).UTC()},
Permissions: media.ReadWrite,
})
if err != nil {
panic(err)
}
return (*result.AssetContainerSasUrls)[0], nil
}
storage.go
func UploadToBlobFromSASUrl(sasUrl string) error {
// When someone receives the URL, they access the SAS-protected resource with code like this:
u, err := url.Parse(sasUrl)
if err != nil {
panic(err)
}
containerURL := azblob.NewContainerURL(*u, azblob.NewPipeline(azblob.NewAnonymousCredential(), azblob.PipelineOptions{}))
blockBlobUrl := containerURL.NewBlockBlobURL("sample.mp4")
video, err := os.Open("./sample_videos/sample1.mp4")
if err != nil {
panic(err)
}
resp, err := blockBlobUrl.Upload(context.Background(), video, azblob.BlobHTTPHeaders{}, azblob.Metadata{}, azblob.BlobAccessConditions{})
if err != nil {
panic(err)
}
buf := new(bytes.Buffer)
_, err = buf.ReadFrom(resp.Response().Body)
if err != nil {
panic(err)
}
newStr := buf.String()
log.Println(resp.Status(), resp.StatusCode(), newStr)
return nil
}
From what i understood from the docs, the asset should be present and be associated with the video blob, but when i tried to encode it, it says there is no file associated with the asset.
Is there something I'm missing? Any help is appreciated
I am trying to use sidecar mode in kubernetes to create a logs sidecar to expose specific container logs. And I am using kubernetes client to fetch logs from kubernetes api and send it out by websocket. The code shows below:
func serveWs(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Access-Control-Allow-Origin", "*")
conn, err := upgrader.Upgrade(w, r, nil)
if err != nil {
if _, ok := err.(websocket.HandshakeError); !ok {
log.Println(err)
}
return
}
defer conn.Close()
logsClient, err := InitKubeLogsClient(config.InCluster)
if err != nil {
log.Fatalln(err)
}
stream, err := logsClient.GetLogs(config.Namespace, config.PodName, config.ContainerName)
if err != nil {
log.Fatalln(err)
}
defer stream.Close()
reader := bufio.NewReader(stream)
for {
line, err := reader.ReadString('\n')
if err != nil {
log.Fatalln(err)
}
conn.WriteMessage(websocket.TextMessage, []byte(line))
}
}
I am using https://github.com/gorilla/websocket as the websocket lib. And on the browser
Is this the best way to do what I want? Is there some better way to just expose the logs api from k8s to websocket?
Put my final code here, thanks for the tips from #Peter:
func serveWs(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Access-Control-Allow-Origin", "*")
conn, err := upgrader.Upgrade(w, r, nil)
if err != nil {
if _, ok := err.(websocket.HandshakeError); !ok {
log.Println(err)
}
return
}
log.Println("create new connection")
defer func() {
conn.Close()
log.Println("connection close")
}()
logsClient, err := InitKubeLogsClient(config.InCluster)
if err != nil {
log.Println(err)
return
}
stream, err := logsClient.GetLogs(config.Namespace, config.PodName, config.ContainerName)
if err != nil {
log.Println(err)
return
}
defer stream.Close()
reader := bufio.NewReaderSize(stream, 16)
lastLine := ""
for {
data, isPrefix, err := reader.ReadLine()
if err != nil {
log.Println(err)
return
}
lines := strings.Split(string(data), "\r")
length := len(lines)
if len(lastLine) > 0 {
lines[0] = lastLine + lines[0]
lastLine = ""
}
if isPrefix {
lastLine = lines[length-1]
lines = lines[:(length - 1)]
}
for _, line := range lines {
if err := conn.WriteMessage(websocket.TextMessage, []byte(line)); err != nil {
log.Println(err)
return
}
}
}
}
I am trying to implement custom VSCC (Validation System Chaincode) to add some extra logic on the basis of FunctionName and and the payload data(ChaincodeProposalPayload) . Currently i am able to fetch ChaincodeProposalPayload from ChaincodeActionPayload but the data seems to be encoded.
Following is the code i am using.
// args[0] - function name (not used now)
// args[1] - serialized Envelope
// args[2] - serialized policy
args := stub.GetArgs()
// get the envelope...
env, err := utils.GetEnvelopeFromBlock(args[1])
if err != nil {
logger.Errorf("VSCC error: GetEnvelope failed, err %s", err)
return shim.Error(err.Error())
}
// ...and the payload...
payl, err := utils.GetPayload(env)
if err != nil {
logger.Errorf("VSCC error: GetPayload failed, err %s", err)
return shim.Error(err.Error())
}
// ...and the transaction...
tx, err := utils.GetTransaction(payl.Data)
if err != nil {
logger.Errorf("VSCC error: GetTransaction failed, err %s", err)
return shim.Error(err.Error())
}
// loop through each of the actions within
fmt.Println(len(tx.Actions))
for _, act := range tx.Actions {
cap, err := utils.GetChaincodeActionPayload(act.Payload)
if err != nil {
logger.Errorf("VSCC error: GetChaincodeActionPayload failed, err %s", err)
return shim.Error(err.Error())
}
fmt.Println("payload " + string(cap.ChaincodeProposalPayload))
}
In the console Payload is printed as encoded string like
mycc
invoke
a
b
10
How can i properly decode the payload into json?
Something like this should work:
// ChaincodeProposalPayload
cpp, err := utils.GetChaincodeProposalPayload(cap.ChaincodeProposalPayload)
if err != nil {
logger.Errorf("GetChaincodeProposalPayload failed: %s", err)
return shim.Error(err.Error())
}
// ChaincodeInvocationSpec
cis := &peer.ChaincodeInvocationSpec{}
err = proto.Unmarshal(cpp.Input, cis)
if err != nil {
logger.Errorf("GetChaincodeInvokeSpec failed: %s", err)
return shim.Error(err.Error())
}
spec := &peer.ChaincodeSpec
err = proto.Unmarshal(cis.GetChaincodeSpec(),spec)
if err != nil {
logger.Errorf("Unmarshal ChaincodeSpec failed: %s", err)
return shim.Error(err.Error())
}
ccName := spec.GetChaincodeId().GetName()
ccArgs := spec.GetInput().GetArgs()
fnName := ccArgs[0]
for _, arg := range ccArgs[1:] {
// do what you want with your args
}