Beginners use Minio

Recently, companies have the need to store unstructured data , So you need a file storage server ,fastdfs Is an old-fashioned distributed file system , This file system is usually selected , however fastdfs Deployment is cumbersome , And maintenance is troublesome , So I found another one , Find out Minio The profile also looks good , Then the deployment is also very simple .

This article is my first learning test MinIo The record of , So it's a beginner's perspective to use Minio, After in-depth use, we will continue to update MinIO The real experience of .

start-up MinIO service

I prefer to use docker, So use Docker start-up Minio service

docker run -p 9000:9000 -p 9001:9001 --name minio \
 -d --restart=always \
 -e "MINIO_ROOT_USER=admin" \
 -e "MINIO_ROOT_PASSWORD=12345678" \
 -v /data/minio/data:/data \
 -v /data/minio/config:/root/.minio \
 minio/minio server --console-address ":9001" /data

There is a problem here

• MINIO_ROOT_USER： user name , Minimum length is 5 Characters
• MINIO_ROOT_PASSWORD： password , Password cannot be set too simply , Otherwise minio Will fail to start , Minimum length is 8 Characters

Because of this problem , I couldn't start it at first , I thought there was something wrong with my startup . All the way around , Later used docker Look at the log , Problems found , embarrassed .

docker logs  Containers ID

Java The service call

Introduce related Jar package

<dependency>
	<groupId>io.minio</groupId>
	<artifactId>minio</artifactId>
	<version>8.3.3</version>
</dependency>

<dependency>
	<groupId>com.squareup.okhttp3</groupId>
	<artifactId>okhttp</artifactId>
	<version>4.9.1</version>
</dependency>

Code

import io.minio.*;

/**
 * @author panlf
 * @date 2021/12/6
 */
public class MinioFileUpload {
    public static void main(String[] args) {
        try{
            MinioClient minioClient = MinioClient
                    .builder().endpoint("http://192.168.164.130:9000")
                    .credentials("admin","12345678").build();
            /*
             The naming and definition rule of storage bucket is ：
            1. Bucket name must be between  3  To  63  Between characters 
            2. Bucket names can only be lowercase 、 Numbers 、 Period  (.)  And hyphens  (-)  form 
            3. Bucket names must start and end with letters or numbers 
            4. The bucket name must not be  IP  Address format 
            */
            String bucketName = "pdf-file";
            boolean found = minioClient
                    .bucketExists(BucketExistsArgs.builder().bucket(bucketName).build());
            if(!found){
                // If it doesn't exist, create it 
                minioClient.makeBucket(MakeBucketArgs.builder().bucket(bucketName).build());
            }

            // Upload files 
            minioClient.uploadObject(UploadObjectArgs.builder()
                    .bucket(bucketName)
                    .object(" Alibaba Java Development Manual 1.4.0.pdf")
                    .filename("C:\\Users\\panlf\\Desktop\\ Alibaba Java Development Manual 1.4.0.pdf")
                    .build());

            // Download the file 
            minioClient.downloadObject(DownloadObjectArgs.builder()
                    .bucket(bucketName)
                    .object(" Alibaba Java Development Manual 1.4.0.pdf")
                    .filename(" Alibaba Java Development Manual 1.4.0.pdf").build());

        }catch (Exception e){
            e.printStackTrace();
        }
    }
}

Call service above , All of a sudden, an error was reported

The difference between the request time and the current time is too large

Mainly because the server time difference is too large , Then the server needs to resynchronize the time

1.  install ntp ntpdate
yum -y install ntp ntpdate

2.  Synchronize time with the time server 
ntpdate cn.pool.ntp.org

Then it can be used normally .

summary

For beginners ,Minio Service deployment is simple , The calling code is also very simple , Be friendly to novices , Let's look at the actual experience later .