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1 Free ECS ECS0 ECS 1 ECS 2 Private domain name: api.ecs.com Associated VPC: VPC_001 ECS1: public service node Private IP address: 192.168.2.8 ECS2: backup service node Private IP address: 192.168.3.8 3 ECS Product Pricing Details RDS RDS1 RDS2 Private domain name: db.com Associated
Viewing the DNS Server Addresses for an ECS Go to the ECS list page. In the ECS list, click the name of the target ECS. On the Summary tab of the ECS details page, click the VPC name. The Virtual Private Cloud page is displayed.
How Do I Change Default DNS Servers of an ECS to Huawei Cloud Private DNS Servers? How Can I Access an ECS Using Its Host Name? How Can I Map the Private IP Address of an ECS to a Domain Name? How Can I Use a Private Domain Name to Route Internet Traffic?
Go to the ECS list page. In the ECS list, click the name of the target ECS. On the Summary tab of the ECS details page, click the name of the VPC subnet associated with the ECS NIC. In the Gateway and DNS Information area, view the DNS server addresses used by the ECS.
To make your ECS accessible within the private network, change the default DNS servers of the ECS to private DNS servers, see How Do I Change Default DNS Servers of an ECS to Huawei Cloud Private DNS Servers?
Reverse Resolution Process In the following figure, an ECS serves as an email server, and a PTR record is configured to map the EIP of the ECS to the domain name configured for accessing the email server.
To make your ECS accessible within the private network, change the default DNS servers of the ECS to private DNS servers. For detailed operations, see How Do I Change Default DNS Servers of an ECS to Private DNS Servers Provided by the DNS Service?
How Can I Map the Private IP Address of an ECS to a Domain Name? You can configure PTR records to allow end users to query domain names based on IP addresses.
Total number of requests for all ECSs in a VPC No limit - Maximum number of recursive resolution requests for a single ECS in a VPC 600 per second For a single ECS in a VPC, the maximum number of external recursive requests is 600 per second.
Checking the Impact of NSCD Caching Performing a dialing test when NSCD is stopped Run the following command on the ECS to capture UDP packets on port 53: tcpdump -i any udp and port 53 When NSCD is stopped, run the following command on the ECS for three consecutive times. ping -c
If you set the name of an ECS to ecs01, you can create a private zone for ecs01 and add an A record to map ecs01 to the private IP address of the ECS so that the ECS can be accessed using its host name. Procedure Go to the Private Zones page. Click Create Private Zone.
Application Scenarios of Serve Stale As shown in the following figure, a container or an ECS uses the self-built DNS server for domain name resolution.
Best Practices for Private Domain Name Resolution Scenario Example Cloud Services Description Active/standby switchover Configuring Private Domain Names for ECSs for Smooth ECS Switchover DNS ECS RDS VPC If the ECS running your website becomes faulty and you need to use the backup
IP Addresses: 192.168.2.2 and 192.168.3.3 ECS ECS 1 In the CN East-Shanghai1 region, purchase ECS 1 and associate it with VPC 1 and the outbound endpoint for accessing a specific Internet domain name. Private IP address: 192.168.100.10 2 For details, see ECS Pricing Details.
Table 1 DNS and other services Related Service Description Reference Elastic Cloud Server (ECS) DNS can resolve the domain names to IP addresses of ECSs where a website or application is deployed so that end users can use domain name to access the website or application.
Best Practices for Private Domain Name Resolution Configuring Private Domain Names for ECSs for Smooth ECS Switchover Migrating an Enterprise Service Database to the Cloud Using DNS Resolver to Enable Communication Between On-premises Servers and the Cloud Using DNS Resolver to Access
ECS ECS An ECS in the same VPC as the private zone is used for testing domain name resolution. 1 For details, see ECS Pricing Details.
If ECS 2 in VPC A accesses ecs3.example.com, the private DNS server returns 192.168.2.3, which is the IP address of ECS 3 in VPC B. There is no VPC peering connection between VPC A and VPC B. ECS 2 cannot access ECS 3 in VPC B using this IP address. Parent Topic: Private Zones
Set the DNS server addresses of the VPC subnet where the ECS resides to the private DNS server addresses used in each region. For details, see How Do I Change Default DNS Servers of an ECS to Huawei Cloud Private DNS Servers?
If you use an ECS as an email server, configure a PTR record to map the EIP of the ECS to the domain name. This following are operations for you to add a PTR record for a cloud resource, such as ECS.
