How do I configure logging by using OSS SDK for Go? - Object Storage Service

Object Storage Service (OSS) generates access logs to record access to resources stored in OSS buckets. After you enable and configure logging for a bucket, OSS generates access logs every hour based on predefined naming rules and then stores the logs in a specific bucket.

Usage notes

In this topic, the public endpoint of the China (Hangzhou) region is used. If you want to access OSS from other Alibaba Cloud services in the same region as OSS, use an internal endpoint. For more information about OSS regions and endpoints, see Regions, endpoints and open ports.
In this topic, access credentials are obtained from environment variables. For more information about how to configure access credentials, see Configure access credentials.
In this topic, an OSSClient instance is created by using an OSS endpoint. If you want to create an OSSClient instance by using custom domain names or Security Token Service (STS), see Initialization.
To enable logging, you must have the oss:PutBucketLogging permission. To query logging configurations, you must have the oss:GetBucketLogging permission. To disable logging, you must have the oss:DeleteBucketLogging permission. For more information, see Common examples of RAM policies.

Enable logging for a bucket

The following sample code provides an example on how to enable logging for a bucket:

package main

import (
	"fmt"
	"os"

	"github.com/aliyun/aliyun-oss-go-sdk/oss"
)

func main() {
	// Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
	provider, err := oss.NewEnvironmentVariableCredentialsProvider()
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}

	// Create an OSSClient instance. 
        // Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. Specify your actual endpoint. 
	// Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. Specify the actual region.
	clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
	clientOptions = append(clientOptions, oss.Region("yourRegion"))
	// Specify the version of the signature algorithm.
	clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
	client, err := oss.New("yourEndpoint", "", "", clientOptions...)
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
	// Specify the name of the source bucket for which you want to enable logging. Example: examplebucket. 
	bucketName := "examplebucket"
	// Specify the name of the destination bucket in which you want to store the log objects. The source and destination buckets can be the same bucket or different buckets, but they must be located in the same region. 
	targetBucketName := "destbucket"
	// Set the directory in which you want to store the log objects to log/. If you specify this parameter, the log objects are stored in the specified directory of the destination bucket. If you do not specify this parameter, the log objects are stored in the root directory of the destination bucket. 
	targetPrefix := "log/"

	// Enable logging for the bucket. 
	err = client.SetBucketLogging(bucketName, targetBucketName, targetPrefix, true)
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
}

Query the logging configurations of a bucket

The following sample code provides an example on how to query the logging configurations of a bucket:

package main

import (
	"fmt"
	"os"

	"github.com/aliyun/aliyun-oss-go-sdk/oss"
)

func main() {
	// Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
	provider, err := oss.NewEnvironmentVariableCredentialsProvider()
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}

	// Create an OSSClient instance. 
        // Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. Specify your actual endpoint. 
	// Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. Specify the actual region.
	clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
	clientOptions = append(clientOptions, oss.Region("yourRegion"))
	// Specify the version of the signature algorithm.
	clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
	client, err := oss.New("yourEndpoint", "", "", clientOptions...)
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
	// Specify the name of the bucket. Example: examplebucket. 
	bucketName := "examplebucket"

	// View the logging configurations of the bucket. 
	logRes, err := client.GetBucketLogging(bucketName)
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
	fmt.Println("Target Bucket: ", logRes.LoggingEnabled.TargetBucket)
	fmt.Println("Target Prefix: ", logRes.LoggingEnabled.TargetPrefix)
}

Disable logging for a bucket

The following sample code provides an example on how to disable logging for a bucket:

package main

import (
	"fmt"
	"os"

	"github.com/aliyun/aliyun-oss-go-sdk/oss"
)

func main() {
	// Obtain access credentials from environment variables. Before you run the sample code, make sure that the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are configured. 
	provider, err := oss.NewEnvironmentVariableCredentialsProvider()
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}

	// Create an OSSClient instance. 
        // Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com. Specify your actual endpoint. 
	// Specify the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the region to cn-hangzhou. Specify the actual region.
	clientOptions := []oss.ClientOption{oss.SetCredentialsProvider(&provider)}
	clientOptions = append(clientOptions, oss.Region("yourRegion"))
	// Specify the version of the signature algorithm.
	clientOptions = append(clientOptions, oss.AuthVersion(oss.AuthV4))
	client, err := oss.New("yourEndpoint", "", "", clientOptions...)
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
	// Specify the name of the bucket. Example: examplebucket. 
	bucketName := "examplebucket"

	// Disable logging for the bucket. 
	err = client.DeleteBucketLogging(bucketName)
	if err != nil {
		fmt.Println("Error:", err)
		os.Exit(-1)
	}
}

References

For the complete sample code that is used to configure logging, visit GitHub.
For more information about the API operation that you can call to enable logging for a bucket, see PutBucketLogging.
For more information about the API operation that you can call to query the logging configurations of a bucket, see GetBucketLogging.
For more information about the API operation that you can call to disable logging for a bucket, see DeleteBucketLogging.