1 00:00:04,330 --> 00:00:04,800 All right. 2 00:00:04,990 --> 00:00:10,480 We just successfully built a Docker image for our API service, and there was a corresponding image 3 00:00:10,480 --> 00:00:16,239 available for use here with this note, please ensure that you are not running API service somewhere 4 00:00:16,239 --> 00:00:16,540 else. 5 00:00:16,720 --> 00:00:21,670 For instance, in Visual Studio Code here, see that there are no protests and there is just single 6 00:00:21,670 --> 00:00:22,510 tap opened. 7 00:00:22,870 --> 00:00:25,810 Also, I am not running API service here. 8 00:00:26,050 --> 00:00:30,970 In this step, I am running on the front end application and I could basically verify that it is not 9 00:00:30,970 --> 00:00:31,810 running here. 10 00:00:32,020 --> 00:00:36,910 Let me open up a new tap and enter local host and report for you. 11 00:00:36,970 --> 00:00:40,900 If you do like that and I see that this site can be reached. 12 00:00:41,620 --> 00:00:47,830 Let's create a new container based on this image, and for that you need to use command Docker run. 13 00:00:48,310 --> 00:00:55,710 Let's run a new container and live export brought using this option and the list by here folding 50. 14 00:00:55,720 --> 00:01:02,080 If you have to own 50 50 in the moment, I'll explain to you what happens here and afterwards will specify 15 00:01:02,080 --> 00:01:05,230 which image we want to use for this particular container. 16 00:01:05,590 --> 00:01:09,670 And you could use either image ID or repository name. 17 00:01:09,910 --> 00:01:15,310 Let's use a repository name, images, gallery API like that, and let's press enter. 18 00:01:18,070 --> 00:01:21,370 And I see that Flask Web server started successfully. 19 00:01:21,610 --> 00:01:23,980 And it is running at broad 50 50. 20 00:01:24,190 --> 00:01:30,040 And I even see such a request that came from the web browser, and it seems that the web browser attempted 21 00:01:30,040 --> 00:01:31,990 to out or refresh this page. 22 00:01:32,290 --> 00:01:37,780 And of course, now when it attempts to access a root URL, I see a response not found. 23 00:01:38,020 --> 00:01:43,780 And the reason why we get here, not found, is that in our flask application, we didn't add any handler 24 00:01:43,900 --> 00:01:46,290 for root, the URL for what's less. 25 00:01:46,750 --> 00:01:50,830 That's why it automatically wrote Don't ask respawn scored four or four. 26 00:01:50,830 --> 00:01:52,390 Not found no. 27 00:01:52,400 --> 00:01:58,150 Let's test our eBay service, and there was only a single API endpoint that we able to test and add 28 00:01:58,150 --> 00:01:59,560 the so-called new image. 29 00:01:59,770 --> 00:02:06,880 Let me go here to when you are a file and here with this end point, so up to throw out a new image. 30 00:02:07,450 --> 00:02:09,699 Let's test it and let's go to web browser. 31 00:02:09,699 --> 00:02:11,770 And here, let's add for what's less. 32 00:02:12,040 --> 00:02:15,790 Basically, I have it here in the dropdown, and let's keep query, Karl. 33 00:02:16,270 --> 00:02:17,700 Let's check whether it works or not. 34 00:02:17,710 --> 00:02:20,280 And yes, I got response from the US place. 35 00:02:20,860 --> 00:02:28,510 It means that now our API service works as before, but now it works inside of the Docker container. 36 00:02:29,410 --> 00:02:35,530 But what is the difference between running this eBay service locally, as we did before and inside is 37 00:02:35,530 --> 00:02:36,400 a Docker container? 38 00:02:37,270 --> 00:02:38,380 Let me demonstrate to you. 39 00:02:38,650 --> 00:02:45,690 Let me open up a new tab here like that and let me again list Docker images, Docker images, and no, 40 00:02:45,700 --> 00:02:49,510 let's create one more container from the same Docker image. 41 00:02:49,600 --> 00:02:58,830 This one image gallery API and belittled and fallen way Docker Run DSP also lets export abroad and heal 42 00:02:58,840 --> 00:03:03,500 this Typekit 50 50 again, same as we did in this example. 43 00:03:03,730 --> 00:03:08,230 50 50 and afterwards article let's type 55 do. 44 00:03:08,650 --> 00:03:12,580 And here let's use same image image gallery API. 45 00:03:13,120 --> 00:03:15,300 Let's press, enter and see what will happen. 46 00:03:15,940 --> 00:03:21,690 And I see error from Docker error response from Daemon Driver or failed programming. 47 00:03:21,700 --> 00:03:29,620 External connectivity on end point by point four four zero 50 50 failed port is already allocated, 48 00:03:30,400 --> 00:03:34,150 and the reason for that is that we are already running one Docker container. 49 00:03:34,660 --> 00:03:43,000 didThe occupies external port 50 50 and difference between those two ports is following this. 50 00:03:43,000 --> 00:03:50,260 Broad is broad that is open inside of the container, and on this broad we run flask API service inside 51 00:03:50,260 --> 00:03:51,370 of the container here. 52 00:03:52,770 --> 00:04:00,060 And now, if you want to access any services inside of the container, you want to bind local port to 53 00:04:00,060 --> 00:04:01,710 external brought on your computer. 54 00:04:02,310 --> 00:04:09,840 And this way we used such option as this be the stealth for published here with specifically local port 55 00:04:09,840 --> 00:04:10,840 on our computer. 56 00:04:11,610 --> 00:04:12,900 And here with bits. 57 00:04:12,900 --> 00:04:20,010 If I brought inside of the container and Docker maps, this external brought on your computer to internal 58 00:04:20,010 --> 00:04:21,480 port of the container. 59 00:04:21,959 --> 00:04:26,240 And this way we were able to access this web page using brought a 50. 60 00:04:26,820 --> 00:04:33,420 This request to our local computer and Docker has brought such a request to this container. 61 00:04:34,080 --> 00:04:40,320 But now, of course, we are not able to reuse same local port on our computers because now it is occupied 62 00:04:40,320 --> 00:04:41,200 by this container. 63 00:04:41,730 --> 00:04:46,980 And this way, now if we want to create one more container from the same image, we need to use another 64 00:04:46,980 --> 00:04:47,490 support. 65 00:04:47,790 --> 00:04:53,640 And let's do that and let's modify probably support from 50 50 dollar, say, 50 51. 66 00:04:53,970 --> 00:04:59,460 You could add here any port you like, but of course, this broad that is brought inside of the container 67 00:04:59,580 --> 00:05:03,840 must remain 50-50 because it is that brought where we start. 68 00:05:03,960 --> 00:05:05,100 Flask Web server. 69 00:05:05,670 --> 00:05:06,090 All right. 70 00:05:06,270 --> 00:05:10,140 Let's now try to run this container run. 71 00:05:11,500 --> 00:05:14,110 And I see that the Flask Web server started. 72 00:05:14,620 --> 00:05:22,660 And here I see exactly the same log as in this output because internally inside of the Container Flask 73 00:05:22,660 --> 00:05:26,110 web server is running at the same port brought 50 50. 74 00:05:26,740 --> 00:05:34,630 But now we expose those flask web servers to different external boards on our computers, and we could 75 00:05:34,630 --> 00:05:36,460 now test it in a web browser. 76 00:05:36,730 --> 00:05:44,830 Let me copy this URL Gordon UTEP wasted here, but no, I will change this port 55 to two Port 5:51 77 00:05:44,830 --> 00:05:45,490 Like this? 78 00:05:46,210 --> 00:05:50,200 Let's now see what we'll get, and I get response from the bliss. 79 00:05:50,680 --> 00:05:54,910 And now this request was processed by this second container. 80 00:05:55,150 --> 00:05:56,920 Here you see two different requests. 81 00:05:57,310 --> 00:06:03,310 One request to the new image and point and another one for federal by the cone, of course, was not 82 00:06:03,310 --> 00:06:09,340 found and the server returned code four or four because we didn't add the Vatican in the flask web. 83 00:06:09,340 --> 00:06:11,860 Cetera, but you got an idea. 84 00:06:12,430 --> 00:06:18,940 Now we are able to process a request in both containers and you could create as many containers as you 85 00:06:18,940 --> 00:06:19,300 like. 86 00:06:19,570 --> 00:06:25,990 All of them will perform same operations because all of them are running exactly the same code base. 87 00:06:26,650 --> 00:06:33,250 And now, in order to run API service, we basically don't require those files in our images gallery 88 00:06:33,250 --> 00:06:33,910 folder. 89 00:06:33,940 --> 00:06:40,090 I mean, API subfolder and others, you could simply delete them and use only Docker images. 90 00:06:40,240 --> 00:06:41,200 This how it works. 91 00:06:41,710 --> 00:06:48,760 All those files, including, for instance, may end up by a file e needed local file, even all located 92 00:06:48,910 --> 00:06:49,420 inside. 93 00:06:49,420 --> 00:06:56,740 There was a Docker image because here on this line, we actually corbet all application files to the 94 00:06:56,740 --> 00:07:02,050 image, and now you're able to reuse it multiple times and create different containers. 95 00:07:02,920 --> 00:07:03,310 All right. 96 00:07:03,580 --> 00:07:05,840 Let's no stop this second container. 97 00:07:05,860 --> 00:07:07,120 We don't need it anymore. 98 00:07:07,690 --> 00:07:12,010 And no, if I anti-Europeans repeals, I'll see only one container does running. 99 00:07:12,640 --> 00:07:14,910 And here was binding of the ports. 100 00:07:14,920 --> 00:07:20,860 We bind a local a port on our computers 550 to port, 50:50 inside of the container. 101 00:07:21,830 --> 00:07:28,970 He was command that was executed by the man to try this container was created 13 minutes ago. 102 00:07:29,720 --> 00:07:35,390 He was container idea and he was image that was used for running of this container. 103 00:07:36,080 --> 00:07:41,330 Of course, if I try to access this, you're now using 40, 50 51. 104 00:07:41,630 --> 00:07:47,630 I'll get this side can be reached because no second container is stopped and we are not able to access 105 00:07:47,630 --> 00:07:48,290 it anymore. 106 00:07:48,830 --> 00:07:55,850 But we are still able to access this URL at brought 50 50, and here was another response on Splish. 107 00:07:56,360 --> 00:08:01,340 And this response was settled again by this container here with this request. 108 00:08:02,030 --> 00:08:02,450 All right. 109 00:08:02,670 --> 00:08:06,710 Let's know of the small pause explore contents of this container. 110 00:08:07,100 --> 00:08:13,580 And for that, we will open best session to the container and analyze structure of the file system inside 111 00:08:13,580 --> 00:08:14,390 of that container. 112 00:08:14,810 --> 00:08:16,310 I'll see you guys just in a bit.