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The AWS Trial and an Alias IP Address

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[系统(linux) 所属分类 系统(linux) | 发布者 店小二05 | 时间 2017 | 作者 红领巾 ] 0人收藏点击收藏

Now, for most of us, we’re living in a mobile world, which means as our laptop travels, our office moves and our IP address changes. This can be a bit troubling for those that are working in the cloud and our configuration to our cloud relies on locating us via our IP Address being the same as it was in our previous location.


The AWS Trial and an Alias IP Address

What happens if you’re IP Address changes from what you have in your configuration file, (inTerraform’s case, your terraform.tfvars file)? I set my IP Address incorrectly in my file to demonstrate what would happen after I run the terraform apply command:


The AWS Trial and an Alias IP Address

It’s not the most descriptive error, but that I/O timeout should tell you right away that terraform can’t connect back to your machine.

Addressing the IP Address Issue

There are two ways to address this. You can set a static IP Address for your laptop OR just alias your laptop with the IP Address you wish to have. The first is an option, but the alias is easier and is something you can simply do when you need to work with your cloud environment, just aliasing each time to the IP address you have in your configuration file(s).

Static IP Address

You can go to System Preferences or Control Panel, (depending on which OS you’re on) and click on Network and configure your TCP/IP setting to manual and type in an IP Address there. The preference is commonly to choose a non-competitive IP address, (often the one that was dynamically set will do as your manual one to retain) and choose to save the settings. Restart the PC and you can then add that to your configuration files.

Alias IP Address

The second wayto do this is to create an Alias IP address to deter from the challenge of each location/WiFimove having it automatically assigned.

Just as above, we often will use the IP address that was given dynamically and just choose to keep this as the one you’ll keep each time. If you’re unsure of what your IP is, there are a couple ways to collect this information:

Open up a browser and type in “ What is my IP Address ” or from a command prompt:

ipconfig -allor ifconfig , depending on which OS you’re on. Using that IP Address, set it with the following command:

$ sudo ifconfig en0 alias <IP Address> 255.255.255.0
Password: <admin password for workstation>

If you need to unset it later on:

sudo ifconfig en0 -alias <IP Address>

That’s all there is to it. Now add this to your configuration file, (for the AWS Trial, that means setting it in our terraform.tfvars in the YOUR_IP parameter.)

Now you can go wherever you darn well please, set an alias and run whatever terraform commands you wish. All communication will just complete without any error due toa challenging new IP address.

Ain’t that just jiffy?

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