Common Issues And Solutions For Small And Medium-Sized Enterprises Migrating To Tencent Cloud’s Servers In Vietnam

1. Preparation and Evaluation

1. Inventory existing assets: List websites/apps, database size, peak bandwidth, SSL certificates, third-party dependencies. Evaluate target delays and compliance (Vietnamese local regulations). Determine whether a public IP, load balancing, and cross-domain CDN nodes are needed.

2. Select the Vietnam region in the Tencent Cloud console and purchase resources

2. Log in to the Tencent Cloud console → Products & Services → CVM → Select “Vietnam (if available)” or the nearest Southeast Asian node for region. Select the image (Ubuntu/CentOS), specifications, system disk, and data disk. Check Automatic Backup (Snapshot) and Monitoring.

3. Network and security group, VPC configuration

3. Create a new VPC and subnets, and assign an Elastic IP (EIP). Open the necessary ports (80/443/22, and application ports) in the security group. Example: Unblock 0.0.0.0/0 TCP 80/443, with port 22 restricted to administrative IPs. If using Cloud Load Balancing (CLB), enable it on the CLB and bind the backend CVM.

4. System and Environment Preparation (Using Ubuntu as an Example)

4. SSH login: ssh root@EIP. Update system: sudo apt update && sudo apt upgrade -y. Install common software: nginx, mysql-client, php-fpm, etc. (sudo apt install nginx mysql-client -y). Configure time zone and clock synchronization (timedatectl set-timezone Asia/Ho_Who_Minh or Asia/Ho_Who_Minh depends on the specific city).

5. Database Migration (MySQL Example)

5. Backup source database: mysqldump -u root -p --single-transaction --routines --events --databases dbname > dbname.sql . Transfer backup: scp dbname.sql root@EIP:/root/ or use rsync -avz. Target Import: mysql -u root -p < dbname.sql。若数据量大，考虑使用物理备份或二进制日志+增量复制。

6. Migrating Files and Static Resources

6. Use rsync to preserve file permissions and make incremental transfers: rsync -avzP /path/to/www/ root@EIP:/var/www/. Check and correct file permissions (chown -R www-data:www-data /var/www). After deployment, restart the services on the target server (sudo systemctl restart nginx php7.4-fpm).

7. Steps for switching SSL, domain names, and DNS

7. Install the certificate on the target server: You can use Let’s Encrypt certbot (sudo apt install certbot), certbot --nginx -d example.com . Switch DNS: Shorten the domain name TTL in advance to 300 seconds ； Have the DNS resolution service (such as Tencent Cloud DNSPod or others) point the A record to the new EIP and observe it taking effect ； If using a CDN, first create an accelerated domain name on the CDN and set the origin server to the new EIP.

8. CDN, Load Balancing, and Performance Optimization

8. If using Tencent Cloud CDN, add the domain name and select Vietnam/Southeast Asia acceleration nodes, then configure the origin-pull protocol and caching rules. Load balancing configuration health check (HTTP/HTTPS, path such as /health). Performance tuning includes enabling gzip, caching static resources, configuring KeepAlive, and adjusting the database connection pool.

9. Testing, Rolling Back, and Monitoring

9. First, modify local resolution testing on Hosts: 127.0.0.1 example.com Point to the new EIP, and verify functionality, performance, and logging. Stress testing (ab/jmeter) to check the error rate. Preparing to rollback: Retain the old server and maintain data synchronization (double write or delayed synchronization). Configure monitoring alarms (Cloud Monitor CPU/bandwidth/disk).

10. Frequently Asked Questions: Is it necessary to register with China’s ICP after migration?

10. Question: After migrating the website to Vietnamese servers, is it still necessary to register it with ICP in China?

10. Answer: It’s generally not necessary. ICP registration is only applicable to servers within China (data centers on the Chinese mainland). Migrating to overseas servers in Vietnam and other countries is generally not subject to ICP registration requirements. However, if you target Chinese users, it’s advisable to pay attention to cross-border access speeds and compliance with relevant Chinese laws (such as content censorship and privacy protection).

11. Frequently Asked Questions: How to complete the migration with minimal downtime?

11. Question: How to minimize downtime?

11. Answer: Use incremental synchronization with final switchover: First, synchronize all files and data completely (using rsync + mysqldump). Enable binlogs for the database and perform incremental replication during migration. Temporarily stop writing during the switch, then apply the final binlog entries. Finally, update DNS or switch the load balancing back to the original source. Reducing DNS TTL and configuring CDN in advance can further minimize perceived downtime.

12. Frequently Asked Questions: What are the common risks and cost considerations for moving to Vietnam?

12. Question: What are the risks and costs to consider when migrating to Vietnamese servers?

12. Answer: Risks include network latency, unfamiliarity with local operations and maintenance, legal compliance issues, and cross-border bandwidth costs ； The cost items include EIP, bandwidth packages, cloud server specifications, GOIP/load balancing, CDN traffic fees, and operational time costs. It is recommended to start with a small-scale pilot and estimate bandwidth and peak costs, while keeping a rollback option.