AWS 查看 VPC 剩余可分配 IP 地址数量

场景

在CDK初始化ALB时报错，提示IP地址不够。ALB创建时每个子网需要8个IP地址。

命令

vpc-id替换为需要查询的VPC标识符即可。

aws ec2 describe-subnets --region us-east-1 --filters Name=vpc-id,Values=vpc-0012345678998000e --query "Subnets[].[SubnetId,AvailabilityZone,CidrBlock,AvailableIpAddressCount,MapPublicIpOnLaunch,Tags[?Key=='Name'].Value|[0]]" --output table

输出

$ aws ec2 describe-subnets --region us-east-1 --filters Name=vpc-id,Values=vpc-0012345678998000e --query "Subnets[].[SubnetId,AvailabilityZone,CidrBlock,AvailableIpAddressCount,MapPublicIpOnLaunch,Tags[?Key=='Name'].Value|[0]]" --output table
----------------------------------------------------------------------------------------------------------------------------
|                                                      DescribeSubnets                                                     |
+--------------------------+-------------+------------------+-----+--------+-----------------------------------------------+
|  subnet-01234567890123456|  us-east-1a |  10.10.100.0/27  |  10 |  False |  hhh-test1-test1-subnet-private1-us-east-1a   |
|  subnet-01234567890123457|  us-east-1b |  10.10.100.32/27 |  13 |  False |  hhh-test1-test1-subnet-private2-us-east-1b   |
+--------------------------+-------------+------------------+-----+--------+-----------------------------------------------+