Does DCS Support Cross-VPC Access?¶
Cross-VPC means the client and the instance are not in the same VPC.
Generally, VPCs are isolated from each other and ECSs cannot access DCS instances that belong to a different VPC from these ECSs.
However, by establishing VPC peering connections between VPCs, ECSs can access single-node and master/standby DCS instances across VPCs.
When using VPC peering connections to access DCS instances across VPCs, adhere to the rules listed in the following table.
CIDR Blocks of DCS Instances | CIDR Blocks Not Allowed for Clients |
|---|---|
172.16.0.0/12 to 172.16.0.0/24 | 192.168.1.0/24 192.168.2.0/24 192.168.3.0/24 |
192.168.0.0/16 to 192.168.0.0/24 10.0.0.0/8 to 10.0.0.0/24 | 172.31.1.0/24 172.31.2.0/24 172.31.3.0/24 |
For more information about VPC peering connection, see "VPC Peering Connection" in the Virtual Private Cloud User Guide.
Important
Cluster DCS Redis instances do not support cross-VPC access. ECSs in a VPC cannot access cluster DCS instances in another VPC by using VPC peering connections.