Terratest uses the Go testing framework. The easiest way to get started with Terratest is to copy one of the examples and its corresponding tests from this repo. This quick start section uses a Terraform example, but check out the Examples section for other types of infrastructure code you can test (eg, Packer, Kubernetes, etc). 1. Create an examples and test folder. 2. Copy all the files from the basic terraform example into the examples folder. 3. Copy the basic terraform example test into the test folder. 3. Use the tools built into Terratest to validate that the infrastructure works correctly in that environment by making HTTP requests, API calls, SSH connections, etc. 4. Undeploy everything at the end of the test. To make this sort of testing easier, Terratest provides a variety of helper functions and patterns for common infrastructure testing tasks, such as testing Terraform code, testing Packer templates, testing Docker images, executing commands on servers over SSH, making HTTP requests, working with AWS APIs, and so on. How can you test this code to be confident it works correctly?
1. Run terraform init and terraform apply to execute the code. 2. When apply finishes, check that the output variable says, "Hello, World". 3. When you're done testing, run terraform destroy to clean everything up. Using Terratest, you can write an automated test that performs the exact same steps! This code does all the steps we mentioned above, including running terraform init, terraform apply, reading the output variable using terraform output, checking its value is what we expect, and running terraform destroy (using defer to run it at the end of the test, whether the test succeeds or fails). Let's now try out a more realistic Terraform example. The code above deploys an EC2 Instance that is running an Ubuntu Amazon Machine Image (AMI). How can you test this code to be confident it works correctly? 1. Run terraform init and terraform apply to deploy the web server into your AWS account.
39;re done testing, run terraform destroy to clean everything up.
3. Open the IP in your web browser with port 8080 and make sure it says "Hello, World". Note that it can take 1-2 minutes for the server to boot up, so you may have to retry a few times. 4. When you're done testing, run terraform destroy to clean everything up. This test code runs terraform init and terraform apply, reads the server IP using terraform output, makes HTTP requests to the web server (including plenty of retries to account for the server taking time to boot), checks the HTTP response is what we expect, and then runs terraform destroy at the end. Success! Now, every time you make a change to this Terraform code, the test code can run and make sure your web server works as expected. Note that in the go test command above, we set -timeout 30m. This is because Go sets a default test time out of 10 minutes, and if your test take longer than that to run, Go will panic, and kill the test code part way through. This is not only annoying, but also prevents the clean up code from running (the terraform destroy), leaving you with lots of resources hanging in your AWS account. 3 minutes), but we give lots of extra buffer to be extra sure that the test always has a chance to finish cleanly.
You can use Terratest for testing a variety of infrastructure code, not just Terraform. The Dockerfile above creates a simple Docker image that uses Ubuntu 18.04 as a base and writes the text "Hello, World!" to a text file. At this point, you should already know the drill. 1. Run docker build to build the Docker image. 2. Run the image via docker run. 3. Check that the running Docker container has a text file with the text "Hello, World! Instead of using Terraform helpers, this test code uses Terratest's Docker helpers to run docker build, docker run, and check the contents of the text file. As before, you can run this test using go test! Terratest also provides helpers for testing your Kubernetes code. This manifest deploys the Docker training webapp, a simple app that responds with the text "Hello, World! ", as a Kubernetes Deployment and exposes it to the outside world on port 5000 using a LoadBalancer. 1. Run kubectl apply to deploy the Docker training webapp. 2. Use the Kubernetes APIs to figure out the endpoint to hit for the load balancer. 3. Open the endpoint in your web browser on port 5000 and make sure it says "Hello, World". Note that, depending on your Kubernetes cluster, it could take a minute or two for the Docker container to come up, so you may have to retry a few times. 4. When you're done testing, run kubectl delete to clean everything up. The test code above uses Kuberenetes helpers built into Terratest to run kubectl apply, wait for the service to come up, get the service endpoint, make HTTP requests to the service (with plenty of retries), check the response is what we expect, and runs kubectl delete at the end. You run this test with go test as well!
Finding The Best Manga
Moon Breathing (月 (つき) (こ) (きゅう), Tsuki no kokyū?) is a Breathing Style derived from the Sun Breathing used by Upper Rank One, Kokushibō, who was one of the first Demon Slayers who utilized breathing techniques. The techique allows the user to create many "chaotic blades" when slashing that varies in length and size. It is known that Kokushibō continued to develop and add techniques to the Breathing Style over the centuries as an immortal Demon. At this point in the story, it is the only known Breathing Style to possess at least 20 different techniques, easily surpassing the other Breathing Styles. It has been revealed that, like all of the other original breathing styles, the Moon Breathing also branched out of the Sun Breathing. When its creator, Michikatsu Tsugikuni, attempted to learn the Sun Breathing from his twin brother, Yoriichi Tsugikuni, he discovered he was unable to master the breathing style and so was instead trained in an alternate Breathing Style. Yoriichi created it fit and cover his individual strengths and weaknesses, and Michikatsu then continued to train and develop this breathing until it eventually evolved into its own unique Breathing Style, which he named the Moon Breathing.
First Form: Dark Moon, Evening Palace (壹 (いち) (かた) (やみ) (づき) (よい) (みや), Ichi no kata: Yamidzuki - Yoi no Miya? ) - Kokushibō draws his sword and slashes swiftly in a single motion; like with all Moon Breathing techniques, numerous chaotic blades originate from the slash. This technique resembles Iaijutsu. Second Form: Pearl Flower Moongazing (貳 (に) (かた) (しゅ) (か) (ろう) (げつ), Ni no kata: Shuka no Rōgetsu?) - Kokushibō performs several slashes while sending a barrage of chaotic blades forward. Third Form: Loathsome Moon, Chains (參 (さん) (かた) (えん) (き) (づき) (つが), San no kata: Enkizuki - Tsugari?) - Kokushibō swings his sword rapidly in two gigantic crescents slashes, from which a storm of smaller crescents spread.
This technique causes huge destruction in a small area. Fourth Form: Solar Rings, Frostmoon (肆 (し) (かた) (たい) (よう) (りん) (しも) (づき), Shi no kata: Taiyōrin - Shimodzuki? ) - Kokushibō performs a circular small cyclone slashes of chaotic blades straight towards his opponent. Fourth Form: Improved, Red Sun over Paradise (肆 (し) (かた) (かい) (あっき) (よう) (らく) (えん), Shi no kata kai: Akk' yō Rakuen?) - Kokushibō spins his blade slicing through the ground and ripping it out. Causing multiple 180 slashes across the area to be sented towards his opponents as chaotic blades appear when near the enemy slicing into their body. As the circular slashes spin grinding into the enemys skin.
Fifth Form: Moon Spirit Calamitous Eddy (伍 (ご) (かた) (げっ) (ぱく) (さい) (か), Go no kata: Geppaku Saika?) - Kokushibō makes multiple curved slashes layered over one another, resembling a rising vortex. Numerous chaotic blades originate from these slashes. Kokushibō performed this attack without swinging his blade. Sixth Form: Perpetual Night, Lonely Moon - Incessant (陸 (ろく) (かた) (とこ) (よ) (こ) (げつ) (む) (けん), Roku no kata: Tokoyo Kogetsu - Muken?) - Kokushib releases a wild storm of slashes in multiple directions. This technique was powerful enough to not only slice up multiple Hashira around him but also overwhelm the Wind Hashira Sanemi Shinazugawa.