WEBVTT 00:00.813 --> 00:01.740 Presenter: In this section, we're going 00:01.740 --> 00:03.990 to get through our last set of boring config 00:03.990 --> 00:05.400 for the Postgres deployment 00:05.400 --> 00:08.010 and its associated cluster IP service. 00:08.010 --> 00:09.840 So I'm sure you don't need any clever 00:09.840 --> 00:11.850 or witty comments from me at this point. 00:11.850 --> 00:13.320 I'm sure you just wanna get this stuff done. 00:13.320 --> 00:14.850 So let's get to it. 00:14.850 --> 00:16.890 I'm gonna flip on over to my code editor 00:16.890 --> 00:18.930 inside of my K8s directory. 00:18.930 --> 00:23.930 We'll do our Postgres deployment .yaml file. 00:24.120 --> 00:25.500 Now again this is gonna be a file 00:25.500 --> 00:27.090 that's very much identical 00:27.090 --> 00:28.920 to the Redis stuff that we just put together 00:28.920 --> 00:31.230 and even the other different objects 00:31.230 --> 00:32.580 we had put together before that. 00:32.580 --> 00:35.790 I still do not recommend that you ever do a copy paste 00:35.790 --> 00:37.380 of these config files just because it's 00:37.380 --> 00:39.960 so incredibly easy to forget to update 00:39.960 --> 00:41.250 some specific property. 00:41.250 --> 00:43.020 Far safer to just rewrite it. 00:43.020 --> 00:45.120 But that's just my personal opinion. 00:45.120 --> 00:46.980 All right, so we'll do our API version 00:46.980 --> 00:49.413 of apps V1 for our deployment. 00:50.520 --> 00:54.210 This is going to be an object with a type of deployment. 00:54.210 --> 00:57.040 We'll set up our metadata if I can spell it correctly 00:58.200 --> 01:02.130 with a name of Postgres deployment, and then we'll set up 01:02.130 --> 01:05.670 our spec that's going to configure the deployment itself. 01:05.670 --> 01:08.610 So I again want to only have one replica running 01:08.610 --> 01:12.363 of my Postgres container inside of its given pod. 01:12.363 --> 01:15.660 Just very much like our Redis deployment 01:15.660 --> 01:16.493 that we just put together. 01:16.493 --> 01:18.240 We technically can create Postgres 01:18.240 --> 01:20.280 in a sort of cluster of different instances 01:20.280 --> 01:21.930 that are going to all work together 01:21.930 --> 01:25.147 to increase the availability and bandwidth of our database. 01:25.147 --> 01:26.850 However, again, that's something 01:26.850 --> 01:28.020 that's kind of outside the realm 01:28.020 --> 01:30.240 of Kubernetes that we're talking about right now. 01:30.240 --> 01:31.200 So we're just gonna focus 01:31.200 --> 01:33.573 on running a single replica as it stands. 01:34.410 --> 01:36.603 After that, we'll put down our selector. 01:37.950 --> 01:40.110 We're gonna say look for a label 01:40.110 --> 01:44.133 that is matching component Postgres. 01:46.380 --> 01:48.330 We'll then set up our pod template. 01:48.330 --> 01:50.389 So we'll give it a metadata property 01:50.389 --> 01:55.203 with labels of component Postgres. 01:56.610 --> 01:58.350 And then again, I'm going to make sure 01:58.350 --> 02:00.090 that I un-indent back to be on the same 02:00.090 --> 02:02.163 indentation level as metadata. 02:03.120 --> 02:05.220 We'll define our spec for all the different pods 02:05.220 --> 02:07.560 that get created by this deployment. 02:07.560 --> 02:10.230 I'll say here's our list of containers. 02:10.230 --> 02:13.170 I want it to have a name of Postgres. 02:13.170 --> 02:15.840 I want to use the image Postgres. 02:15.840 --> 02:17.010 And then finally, we're going to set up 02:17.010 --> 02:18.330 the ports here as well. 02:18.330 --> 02:21.030 So the default port with Postgres, which we are using 02:21.030 --> 02:23.520 we're not going to reconfigure or anything like that 02:23.520 --> 02:26.460 will set up a container port of 5 4 3 2. 02:26.460 --> 02:28.803 Again, default port for Postgres. 02:29.880 --> 02:31.020 All right, so that looks good. 02:31.020 --> 02:34.200 Now remember, very similarly to all the Redis 02:34.200 --> 02:36.840 and Express API stuff that we had done previously 02:36.840 --> 02:40.500 to get our express and our worker pods 02:40.500 --> 02:41.430 up and working correctly 02:41.430 --> 02:43.466 or more specifically the containers inside there, 02:43.466 --> 02:46.170 they need to have that set of environment variables 02:46.170 --> 02:47.003 that are going to make sure 02:47.003 --> 02:49.683 that they can successfully connect to this copy of Postgres. 02:49.683 --> 02:51.360 So we do have to set up a little bit 02:51.360 --> 02:52.710 of environment variables, 02:52.710 --> 02:54.450 not only inside of this file 02:54.450 --> 02:57.750 but inside of the worker and server deployments as well. 02:57.750 --> 02:59.490 We're gonna take care of that in just second. 02:59.490 --> 03:02.040 But for right now, I wanna first put together 03:02.040 --> 03:04.082 the cluster IP service, and then we'll come back 03:04.082 --> 03:06.810 and talk about all these environment variables 03:06.810 --> 03:09.390 and this PVC thing and all that stuff. 03:09.390 --> 03:11.578 Essentially, I just wanted to get the boring parts 03:11.578 --> 03:13.500 out of the way here at the very start 03:13.500 --> 03:15.660 of these repetitive config files. 03:15.660 --> 03:17.640 And then go over to the more interesting stuff 03:17.640 --> 03:19.020 like the environment variables 03:19.020 --> 03:21.213 and the Postgres persistent volume claim. 03:22.800 --> 03:24.630 All right, so that's our deployment. 03:24.630 --> 03:27.270 We're going to also make inside of our K8s directory 03:27.270 --> 03:32.270 the Postgres cluster IP service .yaml file. 03:36.090 --> 03:37.920 And inside of here, completely identical 03:37.920 --> 03:39.360 to the Postgres one we just, 03:39.360 --> 03:41.850 or excuse me, the Redis one we just put together 03:41.850 --> 03:44.310 I'll do an API version of v1. 03:44.310 --> 03:45.993 We are making a service. 03:47.010 --> 03:51.753 It'll have a metadata name of Postgres cluster IP service 03:55.320 --> 03:59.760 and we'll give it a spec with the type of cluster IP. 03:59.760 --> 04:00.950 And then finally, to make sure that we're, 04:00.950 --> 04:02.700 or not finally, we have two other properties 04:02.700 --> 04:04.290 to do here, but one of the two is going to be 04:04.290 --> 04:06.690 this selector where we'll tell this thing 04:06.690 --> 04:08.670 what set of pods it's going to look for 04:08.670 --> 04:12.360 and as usual, we'll give it component along with the name 04:12.360 --> 04:15.180 or the label that we had applied to it, which was Postgres 04:15.180 --> 04:17.417 as we can verify back inside of our template section 04:17.417 --> 04:19.533 over here inside the deployment. 04:20.790 --> 04:22.890 All right, so now the real last step, 04:22.890 --> 04:24.030 for real this time around, 04:24.030 --> 04:25.920 we're gonna set up our ports. 04:25.920 --> 04:27.260 We're gonna say the default port 04:27.260 --> 04:29.760 of 5 4 3 2 to connect to Redis. 04:29.760 --> 04:31.320 And we're not gonna do any type 04:31.320 --> 04:34.170 of remapping this time around as well. 04:34.170 --> 04:35.823 Up target port. There we go. 04:37.890 --> 04:39.690 All right, so that looks like it's just about it. 04:39.690 --> 04:42.510 Now let's take these two new configuration files 04:42.510 --> 04:45.300 and we're going to apply them to Cube CTL as well. 04:45.300 --> 04:47.640 And then we'll check out our different sets of pods 04:47.640 --> 04:49.519 and make sure that everything is running successfully 04:49.519 --> 04:50.970 before we start to come back 04:50.970 --> 04:54.570 and take care of the Postgres persistent volume claim thing 04:54.570 --> 04:57.150 and some environment variables as well. 04:57.150 --> 05:00.810 So at my terminal, still inside of my complex directory 05:00.810 --> 05:05.130 we'll do our Cube CTL apply, K8s. 05:05.130 --> 05:07.403 Now we should see that we have the Postgres IP service 05:07.403 --> 05:10.320 and the Postgres deployment as well. 05:10.320 --> 05:14.040 So just as before, we'll do our get pods. 05:14.040 --> 05:15.780 And now one of these names is really long 05:15.780 --> 05:18.783 so it wants to kind of wrap the levels with me. 05:20.400 --> 05:22.500 So I can see my Postgres deployment right here. 05:22.500 --> 05:24.870 The container is being created. 05:24.870 --> 05:28.470 I'll do get pods again, and I can now see that it is 05:28.470 --> 05:31.740 in fact up and running for the Postgres deployment. 05:31.740 --> 05:34.780 And I'll make sure that I do my get services as well 05:35.880 --> 05:39.180 and somewhere inside of here, Postgres cluster IP service. 05:39.180 --> 05:40.013 Very good. 05:40.013 --> 05:43.140 And I got pop port 5 4 3 2. 05:43.140 --> 05:45.870 All right, so I think that we are pretty much all set. 05:45.870 --> 05:48.420 So that's just about it on our very basic, 05:48.420 --> 05:50.010 very simplistic config files 05:50.010 --> 05:53.730 for all the different deployments and associated services. 05:53.730 --> 05:54.840 So let's take a pause right here. 05:54.840 --> 05:56.730 When we come back to the next section, we're gonna talk 05:56.730 --> 05:58.590 about some additional work that we need to do 05:58.590 --> 06:00.600 to make sure that the server can connect 06:00.600 --> 06:03.360 to Redis and Postgres, and to make sure 06:03.360 --> 06:06.570 that the worker can connect to Redis as well. 06:06.570 --> 06:08.040 And also let's not forget this 06:08.040 --> 06:10.230 little PVC thing down here. 06:10.230 --> 06:12.980 Okay so, quick pause and I'll see you in just a minute.