Ali cloud classic network migration to VPC network

Foreword

  The entire document is taken from Ali cloud official documents, personal finishing just find useful information.

  

First, why should migrate to VPC?

1. Secure network environment

   • VPC secure network tunnel based technology, the data link layer isolation, for each tenant to provide a separate, isolated network between different proprietary network completely isolated.

2. Controlled network configuration

   • You can completely control their own virtual network, for example, to choose their own range of IP addresses, configure the routing table and gateways, which can easily achieve resource planning and route network routing tables in the network of choice.

3. Ali cloud itself is not recommended to use the classic network.

  

Second, the migration program

1. Unacceptable server restart. Please select mix mixed hung visit program.

   • Hanging mixed: refers to a load balancing may be added simultaneously ECS classic example of a network and receives a network request listening VPC forwarded as a backend server, and supports virtual servers set in the form of mixed hanging load balancing instance public and private networks can be opened mixed hang.
   • Mixed Interview: means the product can accept simultaneously classic cloud network and proprietary ECS network access, these products typically provide access to two domain names, a domain name is the classic network access, in addition to a proprietary network access domain. RDS , Redis , MongoDB and other products support mixed visit, also support other cloud product mix interviewed see Ali cloud .

2. You can accept the server restart. That single ECS migrate directly on the line, get away restart.

   • ECS migration process needs to be restarted.

   • Usable area of ​​migration target VPC ECS switch must be migrated and the unused area of ​​the same.

     • Examples of the east part of an ECS (Hangzhou) available local area network type C does not support the migration.
   • If before migration renewals with change orders or pay for your order is not in effect, the order will be canceled and can not be restored after the migration, we need to re-order.
   • After migration, public IP ECS instances are the same, but you can not view the public IP in the operating system ECS, if your applications are visible on the operating system instance ECS public IP has a dependency, the migration after the meeting influential, evaluate carefully.
   • The migration process instance ID and login information unchanged.

   • Annual subscription ECS instance migration process does not require an additional charge. From the new billing cycle begins, the price calculated in accordance with the specifications of proprietary networks. After migrating to the VPC, ECS usage charges will be reduced.

  

Third, the migration steps

  Production environment is not recommended to reboot the server, because there will be the possibility of the unknown, so the following is only a brief overview of hanging mix mixed visit migration scenarios.

1. First you have to migrate dependent components: RDS, Redis, MongoDB, etc., after migration to the VPC network, custom settings retention time classic network address.
2. Good VPC appropriate division according to the company network environment.
3. VPC purchased two new network of ECS (ECS network or the classic example would not directly converted into VPC), configured with the original project into a classic network availability (classic network within the VPC and network interoperability needs the ClassicLink function) to mix hanging mixed visit access dependent components.
4. Configuring slb first put a little traffic to the ECS instance VPC network, after confirming normal, in order to gradually replace the classic example of the type of network VPC instances out of the project, to be replaced classic example of network type and then directly into VPC instances (this time the project has been cut away, can restart), followed by reuse, conserve resources.
5. Another way is to directly buy the same number of VPC type ECS, mirroring the past all at once, after confirmation in advance out of the original release of the classic type of network ECS (monthly subscription package type). However, Ali cloud by day is the standard deductions, dissatisfied by day to day, so if an excessive number of ECS, there will still be a significant loss.
6. Migration architecture diagram can refer to Ali cloud migration example .