Terraform output

[Harish Kalyanaraman]

I have launched multiple instances and I am getting outputs in a comma separated manner using the following output module .

output "instance_ips" {

 value = ["${aws_instance.docker.*.public_ip}"]

}

I would need to assign these IP's in a variable array and reference it elsewhere . How do I approach this as looping is not available in terraform asaik .

[Lowe Schmidt]

It's easier to help you if you can show where and how you want to use it.

In general you would use it like "${module.mymodule.instance_ips}" to get the values somewhere else. 

--

Lowe Schmidt | +46 723 867 157

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[Harish Kalyanaraman]

Let me elaborate it a little more . I am writing a  bash script to store the ips in a particular way . Something of this format given below .

for((i=1;i<=$count;i++))

do

 echo "http://$(/home/ec2-user/terraform output instance_ips)" >> output.txt

done

Now terraform output instance_ips gives multiple values stored in the list . So for me to complete the loop correctly i need to reference the individual values stored in the list and I am not sure how to reference it in terraform .

On Tuesday, January 3, 2017 at 3:39:49 PM UTC+5:30, Lowe Schmidt wrote:

It's easier to help you if you can show where and how you want to use it.

In general you would use it like "${module.mymodule.instance_ips}" to get the values somewhere else. 

--

Lowe Schmidt | +46 723 867 157

On 3 January 2017 at 10:13, Harish Kalyanaraman <harish.ka...@gmail.com> wrote:

I have launched multiple instances and I am getting outputs in a comma separated manner using the following output module .

output "instance_ips" {

 value = ["${aws_instance.docker.*.public_ip}"]

}

I would need to assign these IP's in a variable array and reference it elsewhere . How do I approach this as looping is not available in terraform asaik .

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[Lowe Schmidt]

Is you're problem with the bash script or with terraform? 

For storing all the IP's in a text file, 

terraform output instance_ips >> outputs.txt 

will suffice, you may want to strip commas with sed or something like that.

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[Harish Kalyanaraman]

I want to reference the individual ip's out of this which would be called in the bash script as I have mentioned . I want my output like this

http://instance1_ip

http://instance2_ip

[Lowe Schmidt]

Something like this ? 

for i in $(tf output "Private IPs"); do echo http://${i//,}; done 

http://10.19.64.173

http://10.19.64.48

http://10.19.65.101

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[Harish Kalyanaraman]

It is working . I didn't think of using this approach .Thanks a lot for your help Lowe :) . 

[Lowe Schmidt]

I also found this now; for future reference

https://www.terraform.io/docs/configuration/interpolation.html#formatlist_format_args_ 

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