WEBVTT 00:00.750 --> 00:02.160 -: At this point, we have the ability to create 00:02.160 --> 00:05.670 a new custom image out of our Dockerfile, 00:05.670 --> 00:08.277 and we can do so by running docker build., 00:09.300 --> 00:11.700 the output from all that is this very last line 00:11.700 --> 00:12.533 right here that says, 00:12.533 --> 00:14.940 "Successfully built, blah, blah, blah." 00:14.940 --> 00:17.730 This is the idea of the image that was just created. 00:17.730 --> 00:20.250 So we can now create a container out of this image 00:20.250 --> 00:23.248 by copying the ID and running docker run, 00:23.248 --> 00:25.830 and then placing the ID in there. 00:25.830 --> 00:27.349 Now, when we run this command, 00:27.349 --> 00:30.150 an instance of our image we created 00:30.150 --> 00:32.190 will get a new container and inside that, 00:32.190 --> 00:35.760 we're going to be running an instance of Redis Server. 00:35.760 --> 00:37.830 So I'll hit enter and there we go, 00:37.830 --> 00:39.030 we've got our copy of Redis. 00:39.030 --> 00:41.630 And again, all the warnings, you can totally ignore. 00:42.480 --> 00:43.710 Now, one thing I wanna point out here 00:43.710 --> 00:45.750 is that having to execute docker run, 00:45.750 --> 00:47.340 and then paste in that ID, 00:47.340 --> 00:48.173 well, I don't have anymore, 00:48.173 --> 00:50.040 but having to paste in that ID is kind of a pain. 00:50.040 --> 00:52.087 And it sure was a lot nicer earlier in the course 00:52.087 --> 00:53.610 when we were able to do stuff 00:53.610 --> 00:58.230 like just simply docker run redis or docker run hello world. 00:58.230 --> 01:01.770 In those cases, we didn't have to memorize an ID to use. 01:01.770 --> 01:04.350 So we can actually do the same by slightly changing 01:04.350 --> 01:07.170 the form of the docker build command. 01:07.170 --> 01:09.300 Here's what we're gonna do. 01:09.300 --> 01:11.670 We are going to run docker build, 01:11.670 --> 01:14.160 and then we're gonna add on this little argument right here 01:14.160 --> 01:16.950 that is going to tag the image that is created, 01:16.950 --> 01:19.230 and make it a lot easier to refer to it 01:19.230 --> 01:22.140 by a name that you and I can customize. 01:22.140 --> 01:27.140 The convention for this is your Docker ID, a slash, 01:28.080 --> 01:30.390 the name of the project that you're working on, 01:30.390 --> 01:32.370 a colon and then the version, 01:32.370 --> 01:34.230 which traditionally is going to be latest 01:34.230 --> 01:37.020 whenever you are building the newest version of an image. 01:37.020 --> 01:39.750 But in general, that is supposed to actually be a version. 01:39.750 --> 01:42.600 So traditionally, a number or for the latest version 01:42.600 --> 01:45.300 of your image, you simply say, "Latest." 01:45.300 --> 01:46.920 Now, this is a convention right here. 01:46.920 --> 01:49.018 You're gonna see all projects in Docker 01:49.018 --> 01:52.590 trying to follow this convention as much as possible. 01:52.590 --> 01:54.780 You might be wondering why some other images 01:54.780 --> 01:57.480 that we've been able to use have more simplified names 01:57.480 --> 02:02.480 like simply Redis or Hello-World or Busy Box. 02:03.210 --> 02:05.610 Well, all those are community images. 02:05.610 --> 02:08.040 They are images that have been created by people 02:08.040 --> 02:09.870 in the community and kind of open-source 02:09.870 --> 02:12.030 for very popular use. 02:12.030 --> 02:15.090 Anytime that you are creating an image of your own, 02:15.090 --> 02:17.943 you're always going to prefix it with your Docker ID. 02:18.780 --> 02:21.600 All right, so let's give this a shot and see how it works. 02:21.600 --> 02:23.940 So I'm gonna flip back over my terminal, 02:23.940 --> 02:28.233 and we are going to execute docker build-t, 02:29.610 --> 02:30.780 your Docker ID, 02:30.780 --> 02:31.920 so for me it's Steven Grider, 02:31.920 --> 02:34.950 for you, it's probably gonna be something else, 02:34.950 --> 02:38.280 slash, whatever you want the name of the project to be. 02:38.280 --> 02:39.750 So I'm gonna use Redis. 02:39.750 --> 02:41.760 You can do Redis, you can do Redis Server. 02:41.760 --> 02:43.739 Really anything goes here. 02:43.739 --> 02:47.730 A colon and I'll say specifically, "Latest." 02:47.730 --> 02:49.650 And then don't forget, after all that stuff, 02:49.650 --> 02:52.680 we still have to put in that dot at the very end. 02:52.680 --> 02:55.680 Still need to specify that build context, 02:55.680 --> 02:57.600 which, again, is the source of all the files, 02:57.600 --> 02:59.190 and folders that are to going to used 02:59.190 --> 03:01.290 to build your container out. 03:01.290 --> 03:03.510 One quick reminder, we're not really doing a lot 03:03.510 --> 03:04.650 with this build context yet, 03:04.650 --> 03:07.905 but we will use it for something later on in the course. 03:07.905 --> 03:10.470 All right, so once you got all that in there, 03:10.470 --> 03:12.967 we'll run that and then the output down here says, 03:12.967 --> 03:13.980 "Successfully built." 03:13.980 --> 03:17.640 The image ID, but then it tagged it as, "This name." 03:17.640 --> 03:19.770 And so now we can start up a container 03:19.770 --> 03:22.560 outta this image by running docker run, 03:22.560 --> 03:24.630 and then using the name that we just provided 03:24.630 --> 03:28.833 of Steven Grider or whatever your tag is, slash Redis. 03:29.670 --> 03:31.830 And then you do not have to actually specify 03:31.830 --> 03:33.120 the version on the end. 03:33.120 --> 03:36.420 You can simply leave it as your Docker ID slash Redis. 03:36.420 --> 03:38.430 If you don't put on the version on the end 03:38.430 --> 03:40.290 then the latest version of the container, 03:40.290 --> 03:43.353 or the latest version of the image will be used by default. 03:44.460 --> 03:45.840 So I'll run that and sure enough, 03:45.840 --> 03:48.063 we get our Docker image running. 03:48.990 --> 03:51.753 All right, so one last quick kind of nitpick thing 03:51.753 --> 03:53.010 that I want to throw out here, 03:53.010 --> 03:55.470 just because you might see some documentation 03:55.470 --> 03:56.940 that looks a little bit confusing. 03:56.940 --> 03:59.760 Technically, the version number on the very end here, 03:59.760 --> 04:01.980 this is technically the tag. 04:01.980 --> 04:04.110 Now, the entire process of what we just did 04:04.110 --> 04:06.120 is known as tagging the image, 04:06.120 --> 04:08.820 and even the argument we used was -T right here. 04:08.820 --> 04:11.490 So we call this process tagging the image, 04:11.490 --> 04:14.550 but technically just the version on the end is the tag. 04:14.550 --> 04:16.260 Everything else on here is actually 04:16.260 --> 04:18.480 like the repository or the project name. 04:18.480 --> 04:20.250 So just a little bit of a nitpick. 04:20.250 --> 04:22.125 I just want you to be aware of that. 04:22.125 --> 04:23.730 All right, so that's pretty much it. 04:23.730 --> 04:24.660 Let's take a quick break, 04:24.660 --> 04:26.610 and we'll continue in the next section.