Created
June 27, 2017 18:27
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Using EC2 metadata determine resolver IP as VPC base + 2.
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| #!/bin/bash | |
| MAC=$( curl -fs http://169.254.169.254/2016-09-02/meta-data/network/interfaces/macs/ ) | |
| VPC_CIDR=$( curl -fs http://169.254.169.254/2016-09-02/meta-data/network/interfaces/macs/${MAC%/}/vpc-ipv4-cidr-block/ ) | |
| BASE_IP=${VPC_CIDR%/*} | |
| ABC_IP=${BASE_IP%.*} | |
| D_IP=${BASE_IP##*.} | |
| D_IP=$(( D_IP + 2 )) | |
| RESOLVER_IP=${ABC_IP}.${D_IP} | |
| echo $RESOLVER_IP |
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