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takuma-saito/change-ip-by-eip.sh

Last active November 16, 2015 02:48
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change-ip-by-eip.sh
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change-ip-by-eip.sh
#!/bin/zsh
InstanceId="$1"
# allocation id of current ip
OldAllocationId=$(aws ec2 describe-addresses |
jq -r '.Addresses[] | select(.InstanceId == "'$InstanceId'") | .AllocationId')
# create address
NewAllocationId=$(aws ec2 allocate-address | jq -r '.AllocationId')
echo new:$NewAllocationId old:$OldAllocationId
aws ec2 associate-address --instance-id $InstanceId --allocation-id $NewAllocationId
aws ec2 release-address --allocation-id $OldAllocationId
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