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Golang Admin Client API Reference

The MinIO Admin Golang Client SDK provides APIs to manage MinIO services.

This quickstart guide will show you how to install the MinIO Admin client SDK, connect to MinIO admin service, and provide a walkthrough of a simple file uploader.

This document assumes that you have a working Golang setup.

Initialize MinIO Admin Client object.

MinIO


package main

import (
    "fmt"

    "github.com/minio/minio/pkg/madmin"
)

func main() {
    // Use a secure connection.
    ssl := true

    // Initialize minio client object.
    mdmClnt, err := madmin.New("your-minio.example.com:9000", "YOUR-ACCESSKEYID", "YOUR-SECRETKEY", ssl)
    if err != nil {
        fmt.Println(err)
        return
    }

    // Fetch service status.
    st, err := mdmClnt.ServerInfo()
    if err != nil {
        fmt.Println(err)
        return
    }
	for _, peerInfo := range serversInfo {
		log.Printf("Node: %s, Info: %v\n", peerInfo.Addr, peerInfo.Data)
	}
}

Service operations	Info operations	Healing operations	Config operations
`ServiceTrace`	`ServerInfo`	`Heal`	`GetConfig`
`ServiceStop`	`StorageInfo`		`SetConfig`
`ServiceRestart`	`AccountInfo`

Top operations	IAM operations	Misc	KMS
`TopLocks`	`AddUser`	`StartProfiling`	`GetKeyStatus`
	`SetUserPolicy`	`DownloadProfilingData`
	`ListUsers`	`ServerUpdate`
	`AddCannedPolicy`

1. Constructor

New(endpoint string, accessKeyID string, secretAccessKey string, ssl bool) (*AdminClient, error)

Initializes a new admin client object.

Parameters

Param	Type	Description
`endpoint`	string	MinIO endpoint.
`accessKeyID`	string	Access key for the object storage endpoint.
`secretAccessKey`	string	Secret key for the object storage endpoint.
`ssl`	bool	Set this value to 'true' to enable secure (HTTPS) access.

2. Service operations

ServiceStatus(ctx context.Context) (ServiceStatusMetadata, error)

Fetch service status, replies disk space used, backend type and total disks offline/online (applicable in distributed mode).

Param	Type	Description
`serviceStatus`	ServiceStatusMetadata	Represents current server status info in following format:

Param	Type	Description
`st.ServerVersion.Version`	string	Server version.
`st.ServerVersion.CommitID`	string	Server commit id.
`st.Uptime`	time.Duration	Server uptime duration in seconds.

Example


   st, err := madmClnt.ServiceStatus(context.Background())
   if err != nil {
   	log.Fatalln(err)
   }
   log.Printf("%#v\n", st)

ServiceRestart(ctx context.Context) error

Sends a service action restart command to MinIO server.

Example

   // To restart the service, restarts all servers in the cluster.
   err := madmClnt.ServiceRestart(context.Background())
   if err != nil {
       log.Fatalln(err)
   }
   log.Println("Success")

ServiceStop(ctx context.Context) error

Sends a service action stop command to MinIO server.

Example

   // To stop the service, stops all servers in the cluster.
   err := madmClnt.ServiceStop(context.Background())
   if err != nil {
       log.Fatalln(err)
   }
   log.Println("Success")

ServiceTrace(ctx context.Context, allTrace bool, doneCh <-chan struct{}) <-chan TraceInfo

Enable HTTP request tracing on all nodes in a MinIO cluster

Example

    doneCh := make(chan struct{})
    defer close(doneCh)
    // listen to all trace including internal API calls
    allTrace := true
    // Start listening on all trace activity.
    traceCh := madmClnt.ServiceTrace(context.Background(), allTrace, doneCh)
    for traceInfo := range traceCh {
        fmt.Println(traceInfo.String())
    }

3. Info operations

ServerInfo(ctx context.Context) ([]ServerInfo, error)

Fetches information for all cluster nodes, such as server properties, storage information, network statistics, etc.

Param	Type	Description
`si.Addr`	string	Address of the server the following information is retrieved from.
`si.ConnStats`	ServerConnStats	Connection statistics from the given server.
`si.HTTPStats`	ServerHTTPStats	HTTP connection statistics from the given server.
`si.Properties`	ServerProperties	Server properties such as region, notification targets.

Param	Type	Description
`ServerProperties.Uptime`	time.Duration	Total duration in seconds since server is running.
`ServerProperties.Version`	string	Current server version.
`ServerProperties.CommitID`	string	Current server commitID.
`ServerProperties.Region`	string	Configured server region.
`ServerProperties.SQSARN`	[]string	List of notification target ARNs.

Param	Type	Description
`ServerConnStats.TotalInputBytes`	uint64	Total bytes received by the server.
`ServerConnStats.TotalOutputBytes`	uint64	Total bytes sent by the server.

Param	Type	Description
`ServerHTTPStats.TotalHEADStats`	ServerHTTPMethodStats	Total statistics regarding HEAD operations
`ServerHTTPStats.SuccessHEADStats`	ServerHTTPMethodStats	Total statistics regarding successful HEAD operations
`ServerHTTPStats.TotalGETStats`	ServerHTTPMethodStats	Total statistics regarding GET operations
`ServerHTTPStats.SuccessGETStats`	ServerHTTPMethodStats	Total statistics regarding successful GET operations
`ServerHTTPStats.TotalPUTStats`	ServerHTTPMethodStats	Total statistics regarding PUT operations
`ServerHTTPStats.SuccessPUTStats`	ServerHTTPMethodStats	Total statistics regarding successful PUT operations
`ServerHTTPStats.TotalPOSTStats`	ServerHTTPMethodStats	Total statistics regarding POST operations
`ServerHTTPStats.SuccessPOSTStats`	ServerHTTPMethodStats	Total statistics regarding successful POST operations
`ServerHTTPStats.TotalDELETEStats`	ServerHTTPMethodStats	Total statistics regarding DELETE operations
`ServerHTTPStats.SuccessDELETEStats`	ServerHTTPMethodStats	Total statistics regarding successful DELETE operations

Param	Type	Description
`ServerHTTPMethodStats.Count`	uint64	Total number of operations.
`ServerHTTPMethodStats.AvgDuration`	string	Average duration of Count number of operations.

Param	Type	Description
`DriveInfo.UUID`	string	Unique ID for each disk provisioned by server format.
`DriveInfo.Endpoint`	string	Endpoint location of the remote/local disk.
`DriveInfo.State`	string	Current state of the disk at endpoint.

Example


   serversInfo, err := madmClnt.ServerInfo(context.Background())
   if err != nil {
   	log.Fatalln(err)
   }

   for _, peerInfo := range serversInfo {
   	log.Printf("Node: %s, Info: %v\n", peerInfo.Addr, peerInfo.Data)
   }

StorageInfo(ctx context.Context) (StorageInfo, error)

Fetches Storage information for all cluster nodes.

Param	Type	Description
`storageInfo.Used`	[]int64	Used disk spaces.
`storageInfo.Total`	[]int64	Total disk spaces.
`storageInfo.Available`	[]int64	Available disk spaces.
`StorageInfo.Backend`	struct{}	Represents backend type embedded structure.

Param	Type	Description
`Backend.Type`	BackendType	Type of backend used by the server currently only FS or Erasure.
`Backend.OnlineDisks`	BackendDisks	Total number of disks online per node (only applies to Erasure backend) represented in map[string]int, is empty for FS.
`Backend.OfflineDisks`	BackendDisks	Total number of disks offline per node (only applies to Erasure backend) represented in map[string]int, is empty for FS.
`Backend.StandardSCParity`	int	Parity disks set for standard storage class, is empty for FS.
`Backend.RRSCParity`	int	Parity disks set for reduced redundancy storage class, is empty for FS.
`Backend.Sets`	[][]DriveInfo	Represents topology of drives in erasure coded sets.

Example


   storageInfo, err := madmClnt.StorageInfo(context.Background())
   if err != nil {
   	log.Fatalln(err)
   }

   log.Println(storageInfo)

AccountInfo(ctx context.Context) (AccountInfo, error)

Fetches accounting usage information for the current authenticated user

Param	Type	Description
`AccountInfo.AccountName`	string	Account name.
`AccountInfo.Buckets`	[]BucketUsageInfo	Bucket usage info.

Param	Type	Description
`BucketUsageInfo.Name`	string	The name of the current bucket
`BucketUsageInfo.Size`	uint64	The total size of the current bucket
`BucketUsageInfo.Created`	time.Time	Bucket creation time
`BucketUsageInfo.Access`	AccountAccess	Type of access of the current account

Param	Type	Description
`AccountAccess.Read`	bool	Indicate if the bucket is readable by the current account name.
`AccountAccess.Write`	bool	Indocate if the bucket is writable by the current account name.

Example


   accountInfo, err := madmClnt.AccountInfo(context.Background())
   if err != nil {
	log.Fatalln(err)
   }

   log.Println(accountInfo)

5. Heal operations

Heal(ctx context.Context, bucket, prefix string, healOpts HealOpts, clientToken string, forceStart bool, forceStop bool) (start HealStartSuccess, status HealTaskStatus, err error)

Start a heal sequence that scans data under given (possible empty) bucket and prefix. The recursive bool turns on recursive traversal under the given path. dryRun does not mutate on-disk data, but performs data validation.

Two heal sequences on overlapping paths may not be initiated.

The progress of a heal should be followed using the same API Heal by providing the clientToken previously obtained from a Heal API. The server accumulates results of the heal traversal and waits for the client to receive and acknowledge them using the status request by providing clientToken.

Example


    opts := madmin.HealOpts{
            Recursive: true,
            DryRun:    false,
    }
    forceStart := false
    forceStop := false
    healPath, err := madmClnt.Heal(context.Background(), "", "", opts, "", forceStart, forceStop)
    if err != nil {
        log.Fatalln(err)
    }
    log.Printf("Heal sequence started at %s", healPath)

HealStartSuccess structure

Param	Type	Description
`s.ClientToken`	string	A unique token for a successfully started heal operation, this token is used to request realtime progress of the heal operation.
`s.ClientAddress`	string	Address of the client which initiated the heal operation, the client address has the form "host:port".
`s.StartTime`	time.Time	Time when heal was initially started.

HealTaskStatus structure

Param	Type	Description
`s.Summary`	string	Short status of heal sequence
`s.FailureDetail`	string	Error message in case of heal sequence failure
`s.HealSettings`	HealOpts	Contains the booleans set in the `HealStart` call
`s.Items`	[]HealResultItem	Heal records for actions performed by server

HealResultItem structure

Param	Type	Description
`ResultIndex`	int64	Index of the heal-result record
`Type`	HealItemType	Represents kind of heal operation in the heal record
`Bucket`	string	Bucket name
`Object`	string	Object name
`Detail`	string	Details about heal operation
`DiskInfo.AvailableOn`	[]int	List of disks on which the healed entity is present and healthy
`DiskInfo.HealedOn`	[]int	List of disks on which the healed entity was restored

6. Config operations

GetConfig(ctx context.Context) ([]byte, error)

Get current config.json of a MinIO server.

Example

    configBytes, err := madmClnt.GetConfig(context.Background())
    if err != nil {
        log.Fatalf("failed due to: %v", err)
    }

    // Pretty-print config received as json.
    var buf bytes.Buffer
    err = json.Indent(buf, configBytes, "", "\t")
    if err != nil {
        log.Fatalf("failed due to: %v", err)
    }

    log.Println("config received successfully: ", string(buf.Bytes()))

SetConfig(ctx context.Context, config io.Reader) error

Set a new config.json for a MinIO server.

Example

    config := bytes.NewReader([]byte(`config.json contents go here`))
    if err := madmClnt.SetConfig(context.Background(), config); err != nil {
        log.Fatalf("failed due to: %v", err)
    }
    log.Println("SetConfig was successful")

7. Top operations

TopLocks(ctx context.Context) (LockEntries, error)

Get the oldest locks from MinIO server.

Example

    locks, err := madmClnt.TopLocks(context.Background())
    if err != nil {
        log.Fatalf("failed due to: %v", err)
    }

    out, err := json.Marshal(locks)
    if err != nil {
        log.Fatalf("Marshal failed due to: %v", err)
    }

    log.Println("TopLocks received successfully: ", string(out))

8. IAM operations

AddCannedPolicy(ctx context.Context, policyName string, policy *iampolicy.Policy) error

Create a new canned policy on MinIO server.

Example

	policy, err := iampolicy.ParseConfig(strings.NewReader(`{"Version": "2012-10-17","Statement": [{"Action": ["s3:GetObject"],"Effect": "Allow","Resource": ["arn:aws:s3:::my-bucketname/*"],"Sid": ""}]}`))
    if err != nil {
        log.Fatalln(err)
    }

    if err = madmClnt.AddCannedPolicy(context.Background(), "get-only", policy); err != nil {
		log.Fatalln(err)
	}

AddUser(ctx context.Context, user string, secret string) error

Add a new user on a MinIO server.

Example

	if err = madmClnt.AddUser(context.Background(), "newuser", "newstrongpassword"); err != nil {
		log.Fatalln(err)
	}

SetUserPolicy(ctx context.Context, user string, policyName string) error

Enable a canned policy get-only for a given user on MinIO server.

Example

	if err = madmClnt.SetUserPolicy(context.Background(), "newuser", "get-only"); err != nil {
		log.Fatalln(err)
	}

ListUsers(ctx context.Context) (map[string]UserInfo, error)

Lists all users on MinIO server.

Example

	users, err := madmClnt.ListUsers(context.Background());
    if err != nil {
		log.Fatalln(err)
	}
    for k, v := range users {
        fmt.Printf("User %s Status %s\n", k, v.Status)
    }

9. Misc operations

ServerUpdate(ctx context.Context, updateURL string) (ServerUpdateStatus, error)

Sends a update command to MinIO server, to update MinIO server to latest release. In distributed setup it updates all servers atomically.

Example

   // Updates all servers and restarts all the servers in the cluster.
   // optionally takes an updateURL, which is used to update the binary.
   us, err := madmClnt.ServerUpdate(context.Background(), updateURL)
   if err != nil {
       log.Fatalln(err)
   }
   if us.CurrentVersion != us.UpdatedVersion {
       log.Printf("Updated server version from %s to %s successfully", us.CurrentVersion, us.UpdatedVersion)
   }

StartProfiling(ctx context.Context, profiler string) error

Ask all nodes to start profiling using the specified profiler mode

Example

    startProfilingResults, err = madmClnt.StartProfiling(context.Background(), "cpu")
    if err != nil {
            log.Fatalln(err)
    }
    for _, result := range startProfilingResults {
        if !result.Success {
            log.Printf("Unable to start profiling on node `%s`, reason = `%s`\n", result.NodeName, result.Error)
        } else {
            log.Printf("Profiling successfully started on node `%s`\n", result.NodeName)
        }
    }

DownloadProfilingData(ctx context.Context) ([]byte, error)

Download profiling data of all nodes in a zip format.

Example

    profilingData, err := madmClnt.DownloadProfilingData(context.Background())
    if err != nil {
            log.Fatalln(err)
    }

    profilingFile, err := os.Create("/tmp/profiling-data.zip")
    if err != nil {
            log.Fatal(err)
    }

    if _, err := io.Copy(profilingFile, profilingData); err != nil {
            log.Fatal(err)
    }

    if err := profilingFile.Close(); err != nil {
            log.Fatal(err)
    }

    if err := profilingData.Close(); err != nil {
            log.Fatal(err)
    }

    log.Println("Profiling data successfully downloaded.")

11. KMS

GetKeyStatus(ctx context.Context, keyID string) (*KMSKeyStatus, error)

Requests status information about one particular KMS master key from a MinIO server. The keyID is optional and the server will use the default master key (configured via MINIO_KMS_VAULT_KEY_NAME or MINIO_KMS_MASTER_KEY) if the keyID is empty.

Example

    keyInfo, err := madmClnt.GetKeyStatus(context.Background(), "my-minio-key")
    if err != nil {
       log.Fatalln(err)
    }
    if keyInfo.EncryptionErr != "" {
       log.Fatalf("Failed to perform encryption operation using '%s': %v\n", keyInfo.KeyID, keyInfo.EncryptionErr)
    }
    if keyInfo.UpdateErr != "" {
       log.Fatalf("Failed to perform key re-wrap operation using '%s': %v\n", keyInfo.KeyID, keyInfo.UpdateErr)
    }
    if keyInfo.DecryptionErr != "" {
       log.Fatalf("Failed to perform decryption operation using '%s': %v\n", keyInfo.KeyID, keyInfo.DecryptionErr)
    }

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Golang Admin Client API Reference

Initialize MinIO Admin Client object.

MinIO

1. Constructor

New(endpoint string, accessKeyID string, secretAccessKey string, ssl bool) (*AdminClient, error)

2. Service operations

ServiceStatus(ctx context.Context) (ServiceStatusMetadata, error)

ServiceRestart(ctx context.Context) error

ServiceStop(ctx context.Context) error

ServiceTrace(ctx context.Context, allTrace bool, doneCh <-chan struct{}) <-chan TraceInfo

3. Info operations

ServerInfo(ctx context.Context) ([]ServerInfo, error)

StorageInfo(ctx context.Context) (StorageInfo, error)

AccountInfo(ctx context.Context) (AccountInfo, error)

5. Heal operations

Heal(ctx context.Context, bucket, prefix string, healOpts HealOpts, clientToken string, forceStart bool, forceStop bool) (start HealStartSuccess, status HealTaskStatus, err error)

HealStartSuccess structure

HealTaskStatus structure

HealResultItem structure

6. Config operations

GetConfig(ctx context.Context) ([]byte, error)

SetConfig(ctx context.Context, config io.Reader) error

7. Top operations

TopLocks(ctx context.Context) (LockEntries, error)

8. IAM operations

AddCannedPolicy(ctx context.Context, policyName string, policy *iampolicy.Policy) error

AddUser(ctx context.Context, user string, secret string) error

SetUserPolicy(ctx context.Context, user string, policyName string) error

ListUsers(ctx context.Context) (map[string]UserInfo, error)

9. Misc operations

ServerUpdate(ctx context.Context, updateURL string) (ServerUpdateStatus, error)

StartProfiling(ctx context.Context, profiler string) error

DownloadProfilingData(ctx context.Context) ([]byte, error)

11. KMS

GetKeyStatus(ctx context.Context, keyID string) (*KMSKeyStatus, error)

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