WEBVTT 00:00.750 --> 00:01.583 -: In the last section, 00:01.583 --> 00:05.760 we spoke about how we make a Dockerrun.aws.json file 00:05.760 --> 00:07.230 to tell Elastic Beanstalk 00:07.230 --> 00:10.200 how to work with our multiple containers. 00:10.200 --> 00:11.640 Now, before we start working on this file, 00:11.640 --> 00:14.400 I wanna show you a little piece of documentation 00:14.400 --> 00:15.840 that's going to be very valuable 00:15.840 --> 00:17.940 when you start making use of Elastic Beanstalk 00:17.940 --> 00:19.620 on your own projects. 00:19.620 --> 00:22.500 First, a little bit of behind the scenes action. 00:22.500 --> 00:26.160 So Elastic Beanstalk doesn't actually know 00:26.160 --> 00:27.960 how to work with containers, 00:27.960 --> 00:30.660 especially a multi-container environment. 00:30.660 --> 00:31.530 Behind the scenes, 00:31.530 --> 00:35.670 when you tell Elastic Beanstalk to host a set of containers, 00:35.670 --> 00:37.920 it's actually delegating that hosting 00:37.920 --> 00:41.100 off to another service that is provided in Amazon, 00:41.100 --> 00:43.683 called the Elastic Container Service, 00:44.610 --> 00:47.673 which is abbreviated very frequently as ECS. 00:49.440 --> 00:51.930 You work with Amazon ECS by creating files 00:51.930 --> 00:54.120 that are called task definitions, 00:54.120 --> 00:56.580 and a task definition is essentially a file 00:56.580 --> 01:00.810 that tells ECS how to run one single container. 01:00.810 --> 01:03.960 Each of these task definition files are very similar, 01:03.960 --> 01:07.020 almost identical to the container definitions 01:07.020 --> 01:08.310 that you and I are going to write 01:08.310 --> 01:11.850 inside of our Dockerrun.aws.json file. 01:11.850 --> 01:14.070 And so, the piece of documentation that I wanna show you 01:14.070 --> 01:17.700 is the documentation around these task definitions. 01:17.700 --> 01:19.860 Essentially, it's a really confusing thing 01:19.860 --> 01:20.693 to understand here, 01:20.693 --> 01:22.530 or to figure out I should say. 01:22.530 --> 01:24.390 But, if you look at the documentation 01:24.390 --> 01:25.800 for the docker run file, 01:25.800 --> 01:27.300 it's not gonna tell you a lot 01:27.300 --> 01:29.520 about the different options that you can pass 01:29.520 --> 01:31.200 to these container definitions, 01:31.200 --> 01:33.510 because it actually kind of wants you to go 01:33.510 --> 01:34.860 and look at the documentation 01:34.860 --> 01:39.360 for a task definition as defined by Amazon ECS. 01:39.360 --> 01:41.340 So, that's why I'm showing this documentation, 01:41.340 --> 01:42.870 'cause it's not immediately clear, 01:42.870 --> 01:44.220 when you start reading the stuff, 01:44.220 --> 01:46.170 that you need to go and read about this 01:46.170 --> 01:49.350 completely different service that AWS is running, 01:49.350 --> 01:50.220 if you want to figure out 01:50.220 --> 01:52.563 how to customize your docker run file. 01:53.520 --> 01:56.430 So, long story short, let's pop open a new tab. 01:56.430 --> 01:58.260 We're going to pull up the documentation 01:58.260 --> 01:59.760 for a task definition, 01:59.760 --> 02:01.890 which is essentially what you and I are writing 02:01.890 --> 02:04.260 inside of that docker run file. 02:04.260 --> 02:09.260 So, I'm going to do a search for Amazon ECS task definition, 02:11.340 --> 02:13.680 and then one of the first results you'll see here 02:13.680 --> 02:16.443 is @docs.aws.amazon.com. 02:17.370 --> 02:20.523 You're looking for Amazon ECS task definitions. 02:22.350 --> 02:23.460 So, hopefully you'll see a page 02:23.460 --> 02:25.620 that looks something like this right here. 02:25.620 --> 02:27.360 If you scroll down just a little bit, 02:27.360 --> 02:31.680 you'll see a topic of task definition parameters. 02:31.680 --> 02:33.000 You'll come to this page, 02:33.000 --> 02:34.140 and then on the right hand side, 02:34.140 --> 02:37.170 you're gonna look for container definitions. 02:37.170 --> 02:39.210 And so what you and I are going to write inside 02:39.210 --> 02:42.330 of our Dockerrun.aws.json file 02:42.330 --> 02:44.220 is essentially gonna follow the format 02:44.220 --> 02:45.600 that you see right here. 02:45.600 --> 02:48.870 So, this is the documentation that you can refer to 02:48.870 --> 02:50.430 if you want to get a better understanding 02:50.430 --> 02:53.280 of what we are writing inside that file. 02:53.280 --> 02:56.820 So we're gonna add in properties like name, image, memory, 02:56.820 --> 02:59.103 all this other stuff, to that file. 03:00.660 --> 03:03.000 Okay, so now that you know where to look, 03:03.000 --> 03:05.100 if you want to get some documentation around this stuff, 03:05.100 --> 03:06.390 let's take a quick pause right here, 03:06.390 --> 03:09.390 and then we'll get started on that file in the next section.