1 00:00:02,280 --> 00:00:04,440 And with that, that is really it 2 00:00:04,440 --> 00:00:08,253 for this module, this was a huge module. 3 00:00:09,560 --> 00:00:13,060 We started by understanding that Docker containers 4 00:00:13,060 --> 00:00:16,309 always work the same and can help us both locally 5 00:00:16,309 --> 00:00:20,310 on our machine during development, as well as in production. 6 00:00:20,310 --> 00:00:23,530 And throughout this module, you saw in great depth, 7 00:00:23,530 --> 00:00:26,670 how we can build images, and then launch containers 8 00:00:26,670 --> 00:00:29,990 based on these images locally on our machine. 9 00:00:29,990 --> 00:00:32,490 I guess you saw that through the entire course already, 10 00:00:32,490 --> 00:00:34,440 but also again in this module, 11 00:00:34,440 --> 00:00:36,220 but then especially in this module, 12 00:00:36,220 --> 00:00:39,350 you also saw how you can take these same containers 13 00:00:39,350 --> 00:00:42,690 and deploy them, for example to AWS, 14 00:00:42,690 --> 00:00:45,390 either by installing Docker on your own there, 15 00:00:45,390 --> 00:00:48,900 or by using a managed service like ECS, 16 00:00:48,900 --> 00:00:51,900 I highlighted a couple of important aspects 17 00:00:51,900 --> 00:00:53,390 you should keep in mind, 18 00:00:53,390 --> 00:00:57,380 like the fact that bind mounts are primarily a thing 19 00:00:57,380 --> 00:01:00,940 during development to mirror our life code 20 00:01:00,940 --> 00:01:02,350 into a running container. 21 00:01:02,350 --> 00:01:05,269 I showed you multistage builds and Docker files. 22 00:01:05,269 --> 00:01:08,500 For example, for applications that require a build step, 23 00:01:08,500 --> 00:01:12,000 like the React app, we had a look at in the last lectures. 24 00:01:12,000 --> 00:01:14,950 This is a powerful feature for ensuring 25 00:01:14,950 --> 00:01:18,280 that you can use Docker to not just to run code locally, 26 00:01:18,280 --> 00:01:20,550 but to also then deploy applications, 27 00:01:20,550 --> 00:01:23,300 which wouldn't work without an extra build step, 28 00:01:23,300 --> 00:01:25,980 we saw how we can deploy multiple containers 29 00:01:25,980 --> 00:01:28,950 within the same task, the same host, you could say, 30 00:01:28,950 --> 00:01:31,280 but also split across multiple hosts, 31 00:01:31,280 --> 00:01:34,470 and therefore running on different URLs. 32 00:01:34,470 --> 00:01:38,230 And I also talked about the trade-offs between having 33 00:01:38,230 --> 00:01:42,400 more control and responsibility and having less of both. 34 00:01:42,400 --> 00:01:44,200 And therefore throughout this module, 35 00:01:44,200 --> 00:01:47,520 you saw two main ways of deploying containers, 36 00:01:47,520 --> 00:01:50,570 you learned how you could connect to a remote machine, 37 00:01:50,570 --> 00:01:54,640 install Docker on it, and then use the Docker installation 38 00:01:54,640 --> 00:01:58,690 on that machine to pull images deployed to Docker Hub 39 00:01:58,690 --> 00:02:00,060 and run them on there. 40 00:02:00,060 --> 00:02:03,260 And you could also use Docker compose there, of course, 41 00:02:03,260 --> 00:02:05,670 it's your machine, you install the tools 42 00:02:05,670 --> 00:02:07,423 you can do whatever you want there. 43 00:02:08,320 --> 00:02:10,919 But because of that extra responsibility 44 00:02:10,919 --> 00:02:14,770 that comes with that, this might not be the best solution 45 00:02:14,770 --> 00:02:17,330 for all applications you might be building, 46 00:02:17,330 --> 00:02:20,030 because you can make errors there, 47 00:02:20,030 --> 00:02:22,760 you can build insecure setups. 48 00:02:22,760 --> 00:02:26,160 And therefore you might wanna go for a managed approach, 49 00:02:26,160 --> 00:02:29,030 for example, with AWS ECS. 50 00:02:29,030 --> 00:02:32,990 And hence, I also introduced you to that in great depth 51 00:02:32,990 --> 00:02:34,560 throughout this module. 52 00:02:34,560 --> 00:02:37,300 And you learned how ECS works 53 00:02:37,300 --> 00:02:39,100 that you work with tasks there, 54 00:02:39,100 --> 00:02:40,630 which contain your containers, 55 00:02:40,630 --> 00:02:44,500 and that you then start these tasks as services, 56 00:02:44,500 --> 00:02:47,880 you learned how you can have one or multiple containers 57 00:02:47,880 --> 00:02:50,720 in the same task or across multiple tasks. 58 00:02:50,720 --> 00:02:54,810 And we also had a look at our AWS resources, 59 00:02:54,810 --> 00:02:57,929 like the elastic file system service, 60 00:02:57,929 --> 00:03:00,760 to add a file system to our containers 61 00:03:00,760 --> 00:03:03,230 to then also add a volume to our containers 62 00:03:03,230 --> 00:03:05,800 to ensure that data is not lost 63 00:03:05,800 --> 00:03:09,563 if a container is redeployed or simply deleted. 64 00:03:10,400 --> 00:03:14,040 We also talked about the special role of databases. 65 00:03:14,040 --> 00:03:17,980 And that there, again, we have this trade-off, 66 00:03:17,980 --> 00:03:21,040 we can deploy our own database containers, 67 00:03:21,040 --> 00:03:23,240 but then we also have to manage them. 68 00:03:23,240 --> 00:03:26,620 And there are aspects like performance, scaling, 69 00:03:26,620 --> 00:03:30,170 availability, but also backups and security, 70 00:03:30,170 --> 00:03:32,140 which can be challenging. 71 00:03:32,140 --> 00:03:35,470 That's why I also recommended that you at least consider 72 00:03:35,470 --> 00:03:38,250 moving to a managed database service 73 00:03:38,250 --> 00:03:40,280 for this specific use case. 74 00:03:40,280 --> 00:03:43,650 And that therefore maybe don't use Docker for that, 75 00:03:43,650 --> 00:03:47,910 but instead, keep Docker focused on your application code 76 00:03:47,910 --> 00:03:50,500 on the node REST API in this example, 77 00:03:50,500 --> 00:03:53,050 on the React single page application, 78 00:03:53,050 --> 00:03:56,120 and move that database responsibility 79 00:03:56,120 --> 00:03:58,440 to some other hosting provider, 80 00:03:58,440 --> 00:04:02,180 which takes care of all the heavy lifting for you. 81 00:04:02,180 --> 00:04:04,230 And therefore, throughout this module, 82 00:04:04,230 --> 00:04:08,920 we did not just move from EC2, our own host machine 83 00:04:08,920 --> 00:04:10,720 with Docker installed on it. 84 00:04:10,720 --> 00:04:14,240 And this fully self managed approach to ECS. 85 00:04:14,240 --> 00:04:18,620 But we also managed from this ECS setup with node 86 00:04:18,620 --> 00:04:21,980 and MongoDB containers being deployed in one task 87 00:04:21,980 --> 00:04:26,260 to this set up where we also then added MongoDB Atlas, 88 00:04:26,260 --> 00:04:31,260 on to this setup, which turned out that it didn't work 89 00:04:31,310 --> 00:04:34,610 because we weren't able to launch two web servers 90 00:04:34,610 --> 00:04:36,250 in the same ECS task 91 00:04:36,250 --> 00:04:39,180 and therefore on the same machine in the end. 92 00:04:39,180 --> 00:04:42,910 So did we finally arrived at this setup 93 00:04:42,910 --> 00:04:46,580 where we had multiple containers running on different tasks, 94 00:04:46,580 --> 00:04:50,870 so different hosting machines, you could say on AWS. 95 00:04:50,870 --> 00:04:54,280 And we therefore had a setup where we finally were able 96 00:04:54,280 --> 00:04:56,800 to run everything the way we want it to run it 97 00:04:56,800 --> 00:04:59,863 now fully deployed to the cloud. 98 00:05:00,840 --> 00:05:02,960 Now there's always more you can learn, 99 00:05:02,960 --> 00:05:06,110 there are always things you could dive in deeper. 100 00:05:06,110 --> 00:05:08,580 Especially when it comes to AWS, 101 00:05:08,580 --> 00:05:11,260 we only scratched the surface here, 102 00:05:11,260 --> 00:05:14,560 because this is no AWS course. 103 00:05:14,560 --> 00:05:17,780 So there is some more you can configure here more settings 104 00:05:17,780 --> 00:05:21,220 you can find you and and there's way more you should learn 105 00:05:21,220 --> 00:05:24,630 about AWS and the services you're using there. 106 00:05:24,630 --> 00:05:28,710 If you plan on using this in your own apps in production, 107 00:05:28,710 --> 00:05:32,410 I really wanna emphasize that this was an example, 108 00:05:32,410 --> 00:05:36,040 I wanted to show you certain challenges you might be facing 109 00:05:36,040 --> 00:05:39,110 and how to think about managed services. 110 00:05:39,110 --> 00:05:42,050 Whereas this manual installation of Docker 111 00:05:42,050 --> 00:05:43,993 on a remote machine you own. 112 00:05:44,870 --> 00:05:49,070 The primary focus of this course was and is Docker, 113 00:05:49,070 --> 00:05:51,200 and you learned about many important features 114 00:05:51,200 --> 00:05:52,910 throughout this module. 115 00:05:52,910 --> 00:05:54,850 You again learned how containers 116 00:05:54,850 --> 00:05:57,350 really can run in different environments, 117 00:05:57,350 --> 00:06:00,180 and that they only need Docker for that. 118 00:06:00,180 --> 00:06:02,480 You learned about multistage builds, 119 00:06:02,480 --> 00:06:05,930 multistage Docker files a very useful feature, 120 00:06:05,930 --> 00:06:08,350 you saw environment variables in action. 121 00:06:08,350 --> 00:06:11,840 And in general, now, you should have a good understanding 122 00:06:11,840 --> 00:06:15,880 of Docker but also of how to use Docker locally 123 00:06:15,880 --> 00:06:18,080 with Docker compose for example, 124 00:06:18,080 --> 00:06:21,490 and what it means to deploy Docker to a remote host. 125 00:06:21,490 --> 00:06:24,740 And of course, if you decide to use Docker only locally 126 00:06:24,740 --> 00:06:26,560 on your machine during development, 127 00:06:26,560 --> 00:06:29,330 that would be totally fine as well. 128 00:06:29,330 --> 00:06:31,880 I just want to give you the big picture, 129 00:06:31,880 --> 00:06:34,100 I want to give you the full tool set 130 00:06:34,100 --> 00:06:37,940 so that you can use Docker containers wherever you want, 131 00:06:37,940 --> 00:06:41,453 on your machine, on a remote machine, everywhere.