1 00:00:00,000 --> 00:00:02,701 So we have our API right here and 2 00:00:02,701 --> 00:00:07,701 for now it has two GETs and there is one little resource 3 00:00:07,899 --> 00:00:09,583 right here and so what we want to do 4 00:00:09,583 --> 00:00:12,250 is deploy this API to my stages. 5 00:00:13,257 --> 00:00:17,588 So let's go back to resources and will do Action deploy API. 6 00:00:17,588 --> 00:00:19,856 Now when we deploy an API, we have to choose a stage 7 00:00:19,856 --> 00:00:21,314 and currently we don't have any stages 8 00:00:21,314 --> 00:00:23,111 so we'll choose a new stage. 9 00:00:23,111 --> 00:00:26,032 This stage name is going to be, for example DEV, 10 00:00:26,032 --> 00:00:29,006 and stage description dev stage. 11 00:00:29,006 --> 00:00:30,631 I'll just have it lower case. 12 00:00:30,631 --> 00:00:33,047 Okay, and deployment description will say: 13 00:00:33,047 --> 00:00:35,047 first deployment to dev. 14 00:00:36,881 --> 00:00:38,994 Here we go, we deploy our code. 15 00:00:38,994 --> 00:00:43,755 So now our code is now in stage and so our whole API 16 00:00:43,755 --> 00:00:47,721 is under this DEV little boat right here; and so we can see 17 00:00:47,721 --> 00:00:50,362 the exact same resources as we had from before, 18 00:00:50,362 --> 00:00:52,585 except this time we have an URL 19 00:00:52,585 --> 00:00:55,746 that we can use to invoke our stage. 20 00:00:55,746 --> 00:00:58,554 So let's click on it and as we can see now, 21 00:00:58,554 --> 00:01:03,129 using this URL /DEV because we are in the DEV stage, 22 00:01:03,129 --> 00:01:05,825 we have a response from a Lambdai function, 23 00:01:05,825 --> 00:01:09,515 statusCode 200, body Hello from Lambdai. 24 00:01:09,515 --> 00:01:13,104 Amazing but what if we go to /houses, 25 00:01:13,104 --> 00:01:15,096 then we get a different response 26 00:01:15,096 --> 00:01:18,015 status 200, body we have beautiful houses. 27 00:01:18,015 --> 00:01:21,989 So we have built and deployed a API already, a rest API. 28 00:01:21,989 --> 00:01:25,484 That doesn't seem like much but we actually did a lot 29 00:01:25,484 --> 00:01:27,305 and all of this is server-less. 30 00:01:27,305 --> 00:01:28,896 My Lambdai functions are being invoked 31 00:01:28,896 --> 00:01:31,531 as I go to different path. 32 00:01:31,531 --> 00:01:34,799 Now in this deployment stage, as you can see, 33 00:01:34,799 --> 00:01:37,288 we have a lot of different options. 34 00:01:37,288 --> 00:01:39,640 So we will not go over all of them, 35 00:01:39,640 --> 00:01:43,049 but you can have a cache, you can throttle some methods, 36 00:01:43,049 --> 00:01:44,260 we'll see this later on. 37 00:01:44,260 --> 00:01:46,374 We can enable logs and tracing, 38 00:01:46,374 --> 00:01:48,479 so we can have CloudWatch logs, etc. 39 00:01:48,479 --> 00:01:51,278 Stage variables is what I have been hammering you with, 40 00:01:51,278 --> 00:01:53,119 so here we can say add a stage variable. 41 00:01:53,119 --> 00:01:56,490 Alias for example, and add the value being dev. 42 00:01:56,490 --> 00:01:58,861 So we know that if we use this alias variable 43 00:01:58,861 --> 00:02:02,560 in our resources now we'll be able to have 44 00:02:02,560 --> 00:02:05,130 like decisions and point it to the right lender function 45 00:02:05,130 --> 00:02:06,997 and this is just an example to illustrate. 46 00:02:06,997 --> 00:02:11,900 We could generate an SDK for Android, JavaScript, IOS, etc. 47 00:02:11,900 --> 00:02:16,428 We could export our API as Swagger and so on, 48 00:02:16,428 --> 00:02:18,914 or Postman Extension, or API Gateway Extension, 49 00:02:18,914 --> 00:02:20,269 so we have a lot of different options 50 00:02:20,269 --> 00:02:22,358 and we can use Swagger Open API3. 51 00:02:22,358 --> 00:02:24,062 We can get a history of the deployments, 52 00:02:24,062 --> 00:02:27,731 so as we change the resources back there 53 00:02:27,731 --> 00:02:30,779 and re-devoid to the stage dev then we'll get an idea 54 00:02:30,779 --> 00:02:32,259 of all the deployments that happen 55 00:02:32,259 --> 00:02:34,330 and we can roll back at any time 56 00:02:34,330 --> 00:02:36,274 to an earlier deployment if something went wrong. 57 00:02:36,274 --> 00:02:38,220 Documentation history if we wanted to provide 58 00:02:38,220 --> 00:02:40,597 documentation for API and Canary 59 00:02:40,597 --> 00:02:43,541 to do this testing I told you about. 60 00:02:43,541 --> 00:02:46,139 When we have, for example, 95% of our traffic 61 00:02:46,139 --> 00:02:48,744 going to one API version and the other one 62 00:02:48,744 --> 00:02:52,880 5% to go to the other API version and you can control this. 63 00:02:52,880 --> 00:02:54,401 Obviously, if you go to your resources 64 00:02:54,401 --> 00:02:57,089 you could deploy your API one more time 65 00:02:57,089 --> 00:02:58,638 and we could create a new stage 66 00:02:58,638 --> 00:03:02,830 and call this stage prod and this is prod API 67 00:03:02,830 --> 00:03:07,098 and here deployment to prod whatever I want to say it 68 00:03:07,098 --> 00:03:09,434 and I deploy and now we have two stages 69 00:03:09,434 --> 00:03:12,359 and our production API can be invoked using this URL. 70 00:03:12,359 --> 00:03:15,185 As we can see can get the same results as before 71 00:03:15,185 --> 00:03:16,810 because we deployed the exact same API 72 00:03:16,810 --> 00:03:18,984 but now we have the /prod, so we can go 73 00:03:18,984 --> 00:03:23,139 to /prod/houses and get another response. 74 00:03:23,139 --> 00:03:25,827 So this is it for our API, here we have deployed two stages 75 00:03:25,827 --> 00:03:29,500 and we could really expand with Stage Variables 76 00:03:29,500 --> 00:03:32,857 if we wanted to but for now we'll just have conceptually 77 00:03:32,857 --> 00:03:34,013 the understanding that Stage Variables will allow us 78 00:03:34,013 --> 00:03:37,486 to marginalize our deployment and customize 79 00:03:37,486 --> 00:03:39,714 what our API gateway does. 80 00:03:39,714 --> 00:03:43,005 So that's it for this lecture, I hope you liked it, 81 00:03:43,005 --> 00:03:45,349 I hope that stages make sense now 82 00:03:45,349 --> 00:03:47,503 and I will see you in the next lecture.