mirror of https://github.com/minio/minio.git
538 lines
22 KiB
Markdown
538 lines
22 KiB
Markdown
# Golang Admin Client API Reference [](https://slack.min.io)
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The MinIO Admin Golang Client SDK provides APIs to manage MinIO services.
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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.
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This document assumes that you have a working [Golang setup](https://golang.org/doc/install).
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## Initialize MinIO Admin Client object.
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## MinIO
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```go
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package main
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import (
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"fmt"
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"github.com/minio/minio/pkg/madmin"
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)
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func main() {
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// Use a secure connection.
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ssl := true
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// Initialize minio client object.
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mdmClnt, err := madmin.New("your-minio.example.com:9000", "YOUR-ACCESSKEYID", "YOUR-SECRETKEY", ssl)
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if err != nil {
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fmt.Println(err)
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return
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}
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// Fetch service status.
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st, err := mdmClnt.ServerInfo()
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if err != nil {
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fmt.Println(err)
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return
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}
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for _, peerInfo := range serversInfo {
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log.Printf("Node: %s, Info: %v\n", peerInfo.Addr, peerInfo.Data)
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}
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}
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```
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| Service operations | Info operations | Healing operations | Config operations |
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|:------------------------------------|:------------------------------|:-------------------|:--------------------------|
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| [`ServiceTrace`](#ServiceTrace) | [`ServerInfo`](#ServerInfo) | [`Heal`](#Heal) | [`GetConfig`](#GetConfig) |
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| [`ServiceStop`](#ServiceStop) | [`StorageInfo`](#StorageInfo) | | [`SetConfig`](#SetConfig) |
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| [`ServiceRestart`](#ServiceRestart) | | | |
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| Top operations | IAM operations | Misc | KMS |
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|:------------------------|:--------------------------------------|:--------------------------------------------------|:--------------------------------|
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| [`TopLocks`](#TopLocks) | [`AddUser`](#AddUser) | [`StartProfiling`](#StartProfiling) | [`GetKeyStatus`](#GetKeyStatus) |
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| | [`SetUserPolicy`](#SetUserPolicy) | [`DownloadProfilingData`](#DownloadProfilingData) | |
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| | [`ListUsers`](#ListUsers) | [`ServerUpdate`](#ServerUpdate) | |
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| | [`AddCannedPolicy`](#AddCannedPolicy) | | |
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## 1. Constructor
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<a name="MinIO"></a>
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### New(endpoint string, accessKeyID string, secretAccessKey string, ssl bool) (*AdminClient, error)
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Initializes a new admin client object.
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__Parameters__
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| Param | Type | Description |
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|:------------------|:---------|:----------------------------------------------------------|
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| `endpoint` | _string_ | MinIO endpoint. |
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| `accessKeyID` | _string_ | Access key for the object storage endpoint. |
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| `secretAccessKey` | _string_ | Secret key for the object storage endpoint. |
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| `ssl` | _bool_ | Set this value to 'true' to enable secure (HTTPS) access. |
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## 2. Service operations
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<a name="ServiceStatus"></a>
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### ServiceStatus(ctx context.Context) (ServiceStatusMetadata, error)
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Fetch service status, replies disk space used, backend type and total disks offline/online (applicable in distributed mode).
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| Param | Type | Description |
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|-----------------|-------------------------|------------------------------------------------------------|
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| `serviceStatus` | _ServiceStatusMetadata_ | Represents current server status info in following format: |
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| Param | Type | Description |
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|-----------------------------|-----------------|------------------------------------|
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| `st.ServerVersion.Version` | _string_ | Server version. |
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| `st.ServerVersion.CommitID` | _string_ | Server commit id. |
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| `st.Uptime` | _time.Duration_ | Server uptime duration in seconds. |
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__Example__
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```go
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st, err := madmClnt.ServiceStatus(context.Background())
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if err != nil {
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log.Fatalln(err)
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}
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log.Printf("%#v\n", st)
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```
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<a name="ServiceRestart"></a>
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### ServiceRestart(ctx context.Context) error
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Sends a service action restart command to MinIO server.
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__Example__
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```go
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// To restart the service, restarts all servers in the cluster.
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err := madmClnt.ServiceRestart(context.Background())
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if err != nil {
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log.Fatalln(err)
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}
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log.Println("Success")
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```
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<a name="ServiceStop"></a>
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### ServiceStop(ctx context.Context) error
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Sends a service action stop command to MinIO server.
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__Example__
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```go
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// To stop the service, stops all servers in the cluster.
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err := madmClnt.ServiceStop(context.Background())
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if err != nil {
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log.Fatalln(err)
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}
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log.Println("Success")
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```
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<a name="ServiceTrace"></a>
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### ServiceTrace(ctx context.Context, allTrace bool, doneCh <-chan struct{}) <-chan TraceInfo
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Enable HTTP request tracing on all nodes in a MinIO cluster
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__Example__
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``` go
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doneCh := make(chan struct{})
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defer close(doneCh)
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// listen to all trace including internal API calls
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allTrace := true
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// Start listening on all trace activity.
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traceCh := madmClnt.ServiceTrace(context.Background(), allTrace, doneCh)
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for traceInfo := range traceCh {
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fmt.Println(traceInfo.String())
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}
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```
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## 3. Info operations
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<a name="ServerInfo"></a>
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### ServerInfo(ctx context.Context) ([]ServerInfo, error)
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Fetches information for all cluster nodes, such as server properties, storage information, network statistics, etc.
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| Param | Type | Description |
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|----------------------------------|--------------------|--------------------------------------------------------------------|
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| `si.Addr` | _string_ | Address of the server the following information is retrieved from. |
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| `si.ConnStats` | _ServerConnStats_ | Connection statistics from the given server. |
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| `si.HTTPStats` | _ServerHTTPStats_ | HTTP connection statistics from the given server. |
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| `si.Properties` | _ServerProperties_ | Server properties such as region, notification targets. |
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| Param | Type | Description |
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|-----------------------------|-----------------|----------------------------------------------------|
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| `ServerProperties.Uptime` | _time.Duration_ | Total duration in seconds since server is running. |
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| `ServerProperties.Version` | _string_ | Current server version. |
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| `ServerProperties.CommitID` | _string_ | Current server commitID. |
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| `ServerProperties.Region` | _string_ | Configured server region. |
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| `ServerProperties.SQSARN` | _[]string_ | List of notification target ARNs. |
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| Param | Type | Description |
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|------------------------------------|----------|-------------------------------------|
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| `ServerConnStats.TotalInputBytes` | _uint64_ | Total bytes received by the server. |
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| `ServerConnStats.TotalOutputBytes` | _uint64_ | Total bytes sent by the server. |
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| Param | Type | Description |
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|--------------------------------------|-------------------------|---------------------------------------------------------|
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| `ServerHTTPStats.TotalHEADStats` | _ServerHTTPMethodStats_ | Total statistics regarding HEAD operations |
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| `ServerHTTPStats.SuccessHEADStats` | _ServerHTTPMethodStats_ | Total statistics regarding successful HEAD operations |
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| `ServerHTTPStats.TotalGETStats` | _ServerHTTPMethodStats_ | Total statistics regarding GET operations |
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| `ServerHTTPStats.SuccessGETStats` | _ServerHTTPMethodStats_ | Total statistics regarding successful GET operations |
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| `ServerHTTPStats.TotalPUTStats` | _ServerHTTPMethodStats_ | Total statistics regarding PUT operations |
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| `ServerHTTPStats.SuccessPUTStats` | _ServerHTTPMethodStats_ | Total statistics regarding successful PUT operations |
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| `ServerHTTPStats.TotalPOSTStats` | _ServerHTTPMethodStats_ | Total statistics regarding POST operations |
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| `ServerHTTPStats.SuccessPOSTStats` | _ServerHTTPMethodStats_ | Total statistics regarding successful POST operations |
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| `ServerHTTPStats.TotalDELETEStats` | _ServerHTTPMethodStats_ | Total statistics regarding DELETE operations |
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| `ServerHTTPStats.SuccessDELETEStats` | _ServerHTTPMethodStats_ | Total statistics regarding successful DELETE operations |
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| Param | Type | Description |
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|-------------------------------------|----------|-------------------------------------------------|
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| `ServerHTTPMethodStats.Count` | _uint64_ | Total number of operations. |
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| `ServerHTTPMethodStats.AvgDuration` | _string_ | Average duration of Count number of operations. |
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| Param | Type | Description |
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|----------------------|----------|-------------------------------------------------------|
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| `DriveInfo.UUID` | _string_ | Unique ID for each disk provisioned by server format. |
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| `DriveInfo.Endpoint` | _string_ | Endpoint location of the remote/local disk. |
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| `DriveInfo.State` | _string_ | Current state of the disk at endpoint. |
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__Example__
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```go
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serversInfo, err := madmClnt.ServerInfo(context.Background())
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if err != nil {
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log.Fatalln(err)
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}
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for _, peerInfo := range serversInfo {
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log.Printf("Node: %s, Info: %v\n", peerInfo.Addr, peerInfo.Data)
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}
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```
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<a name="StorageInfo"></a>
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### StorageInfo(ctx context.Context) (StorageInfo, error)
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Fetches Storage information for all cluster nodes.
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| Param | Type | Description |
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|-------------------------|------------|---------------------------------------------|
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| `storageInfo.Used` | _[]int64_ | Used disk spaces. |
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| `storageInfo.Total` | _[]int64_ | Total disk spaces. |
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| `storageInfo.Available` | _[]int64_ | Available disk spaces. |
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| `StorageInfo.Backend` | _struct{}_ | Represents backend type embedded structure. |
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| Param | Type | Description |
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|----------------------------|-----------------|--------------------------------------------------------------------------------------------------------------------------|
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| `Backend.Type` | _BackendType_ | Type of backend used by the server currently only FS or Erasure. |
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| `Backend.OnlineDisks` | _BackendDisks_ | Total number of disks online per node (only applies to Erasure backend) represented in map[string]int, is empty for FS. |
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| `Backend.OfflineDisks` | _BackendDisks_ | Total number of disks offline per node (only applies to Erasure backend) represented in map[string]int, is empty for FS. |
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| `Backend.StandardSCData` | _int_ | Data disks set for standard storage class, is empty for FS. |
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| `Backend.StandardSCParity` | _int_ | Parity disks set for standard storage class, is empty for FS. |
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| `Backend.RRSCData` | _int_ | Data disks set for reduced redundancy storage class, is empty for FS. |
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| `Backend.RRSCParity` | _int_ | Parity disks set for reduced redundancy storage class, is empty for FS. |
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| `Backend.Sets` | _[][]DriveInfo_ | Represents topology of drives in erasure coded sets. |
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__Example__
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```go
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storageInfo, err := madmClnt.StorageInfo(context.Background())
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if err != nil {
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log.Fatalln(err)
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}
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log.Println(storageInfo)
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```
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## 5. Heal operations
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<a name="Heal"></a>
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### Heal(ctx context.Context, bucket, prefix string, healOpts HealOpts, clientToken string, forceStart bool, forceStop bool) (start HealStartSuccess, status HealTaskStatus, err error)
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Start a heal sequence that scans data under given (possible empty)
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`bucket` and `prefix`. The `recursive` bool turns on recursive
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traversal under the given path. `dryRun` does not mutate on-disk data,
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but performs data validation.
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Two heal sequences on overlapping paths may not be initiated.
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The progress of a heal should be followed using the same API `Heal`
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by providing the `clientToken` previously obtained from a `Heal`
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API. The server accumulates results of the heal traversal and waits
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for the client to receive and acknowledge them using the status
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request by providing `clientToken`.
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__Example__
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``` go
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opts := madmin.HealOpts{
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Recursive: true,
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DryRun: false,
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}
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forceStart := false
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forceStop := false
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healPath, err := madmClnt.Heal(context.Background(), "", "", opts, "", forceStart, forceStop)
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if err != nil {
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log.Fatalln(err)
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}
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log.Printf("Heal sequence started at %s", healPath)
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```
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#### HealStartSuccess structure
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| Param | Type | Description |
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|-------------------|-------------|----------------------------------------------------------------------------------------------------------------------------------|
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| `s.ClientToken` | _string_ | A unique token for a successfully started heal operation, this token is used to request realtime progress of the heal operation. |
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| `s.ClientAddress` | _string_ | Address of the client which initiated the heal operation, the client address has the form "host:port". |
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| `s.StartTime` | _time.Time_ | Time when heal was initially started. |
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#### HealTaskStatus structure
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| Param | Type | Description |
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|-------------------|--------------------|---------------------------------------------------|
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| `s.Summary` | _string_ | Short status of heal sequence |
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| `s.FailureDetail` | _string_ | Error message in case of heal sequence failure |
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| `s.HealSettings` | _HealOpts_ | Contains the booleans set in the `HealStart` call |
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| `s.Items` | _[]HealResultItem_ | Heal records for actions performed by server |
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#### HealResultItem structure
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| Param | Type | Description |
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|------------------------|----------------|-----------------------------------------------------------------|
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| `ResultIndex` | _int64_ | Index of the heal-result record |
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| `Type` | _HealItemType_ | Represents kind of heal operation in the heal record |
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| `Bucket` | _string_ | Bucket name |
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| `Object` | _string_ | Object name |
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| `Detail` | _string_ | Details about heal operation |
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| `DiskInfo.AvailableOn` | _[]int_ | List of disks on which the healed entity is present and healthy |
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| `DiskInfo.HealedOn` | _[]int_ | List of disks on which the healed entity was restored |
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## 6. Config operations
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<a name="GetConfig"></a>
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### GetConfig(ctx context.Context) ([]byte, error)
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Get current `config.json` of a MinIO server.
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__Example__
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``` go
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configBytes, err := madmClnt.GetConfig(context.Background())
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if err != nil {
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log.Fatalf("failed due to: %v", err)
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}
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// Pretty-print config received as json.
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var buf bytes.Buffer
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err = json.Indent(buf, configBytes, "", "\t")
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if err != nil {
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log.Fatalf("failed due to: %v", err)
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}
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log.Println("config received successfully: ", string(buf.Bytes()))
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```
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<a name="SetConfig"></a>
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### SetConfig(ctx context.Context, config io.Reader) error
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Set a new `config.json` for a MinIO server.
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__Example__
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``` go
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config := bytes.NewReader([]byte(`config.json contents go here`))
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if err := madmClnt.SetConfig(context.Background(), config); err != nil {
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log.Fatalf("failed due to: %v", err)
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}
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log.Println("SetConfig was successful")
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```
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## 7. Top operations
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<a name="TopLocks"></a>
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### TopLocks(ctx context.Context) (LockEntries, error)
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Get the oldest locks from MinIO server.
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__Example__
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``` go
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locks, err := madmClnt.TopLocks(context.Background())
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if err != nil {
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log.Fatalf("failed due to: %v", err)
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}
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out, err := json.Marshal(locks)
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if err != nil {
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log.Fatalf("Marshal failed due to: %v", err)
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}
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log.Println("TopLocks received successfully: ", string(out))
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```
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## 8. IAM operations
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<a name="AddCannedPolicy"></a>
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### AddCannedPolicy(ctx context.Context, policyName string, policy *iampolicy.Policy) error
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Create a new canned policy on MinIO server.
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__Example__
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```
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policy, err := iampolicy.ParseConfig(strings.NewReader(`{"Version": "2012-10-17","Statement": [{"Action": ["s3:GetObject"],"Effect": "Allow","Resource": ["arn:aws:s3:::my-bucketname/*"],"Sid": ""}]}`))
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if err != nil {
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log.Fatalln(err)
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}
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if err = madmClnt.AddCannedPolicy(context.Background(), "get-only", policy); err != nil {
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log.Fatalln(err)
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}
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```
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<a name="AddUser"></a>
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### AddUser(ctx context.Context, user string, secret string) error
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Add a new user on a MinIO server.
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__Example__
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``` go
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if err = madmClnt.AddUser(context.Background(), "newuser", "newstrongpassword"); err != nil {
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log.Fatalln(err)
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}
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```
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<a name="SetUserPolicy"></a>
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### SetUserPolicy(ctx context.Context, user string, policyName string) error
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Enable a canned policy `get-only` for a given user on MinIO server.
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__Example__
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``` go
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if err = madmClnt.SetUserPolicy(context.Background(), "newuser", "get-only"); err != nil {
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log.Fatalln(err)
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}
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```
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<a name="ListUsers"></a>
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### ListUsers(ctx context.Context) (map[string]UserInfo, error)
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Lists all users on MinIO server.
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__Example__
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``` go
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users, err := madmClnt.ListUsers(context.Background());
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if err != nil {
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log.Fatalln(err)
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}
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for k, v := range users {
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fmt.Printf("User %s Status %s\n", k, v.Status)
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}
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```
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## 9. Misc operations
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<a name="ServerUpdate"></a>
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### ServerUpdate(ctx context.Context, updateURL string) (ServerUpdateStatus, error)
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Sends a update command to MinIO server, to update MinIO server to latest release. In distributed setup it updates all servers atomically.
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__Example__
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```go
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// Updates all servers and restarts all the servers in the cluster.
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// optionally takes an updateURL, which is used to update the binary.
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us, err := madmClnt.ServerUpdate(context.Background(), updateURL)
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if err != nil {
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log.Fatalln(err)
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}
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if us.CurrentVersion != us.UpdatedVersion {
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log.Printf("Updated server version from %s to %s successfully", us.CurrentVersion, us.UpdatedVersion)
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}
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```
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<a name="StartProfiling"></a>
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### StartProfiling(ctx context.Context, profiler string) error
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Ask all nodes to start profiling using the specified profiler mode
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__Example__
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``` go
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startProfilingResults, err = madmClnt.StartProfiling(context.Background(), "cpu")
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if err != nil {
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log.Fatalln(err)
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}
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for _, result := range startProfilingResults {
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if !result.Success {
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log.Printf("Unable to start profiling on node `%s`, reason = `%s`\n", result.NodeName, result.Error)
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} else {
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log.Printf("Profiling successfully started on node `%s`\n", result.NodeName)
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}
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}
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```
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<a name="DownloadProfilingData"></a>
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### DownloadProfilingData(ctx context.Context) ([]byte, error)
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Download profiling data of all nodes in a zip format.
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__Example__
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``` go
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profilingData, err := madmClnt.DownloadProfilingData(context.Background())
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if err != nil {
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log.Fatalln(err)
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}
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profilingFile, err := os.Create("/tmp/profiling-data.zip")
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if err != nil {
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log.Fatal(err)
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}
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|
|
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
|
|
|
|
<a name="GetKeyStatus"></a>
|
|
### 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__
|
|
|
|
``` go
|
|
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)
|
|
}
|
|
```
|