MongoDB for Developers with Python Transcripts
Chapter: Deploying MongoDB in production (and playing it safe)
Lecture: Installing MongoDB for production use

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0:01 It's time to install MongoDB on our cloud server.
0:04 One thing I'd like to point out is you don't have to necessarily go down this path
0:07 to run your own MongoDB server, you maybe don't want to deal with it,
0:10 maybe you don't have enough experience with it things like that,
0:13 so a couple of options just that I want to point out,
0:16 but I definitely want to show you how to run your own MongoDB server,
0:19 how to do it safely so that you can because in a lot of cases it really is the best.
0:22 So MongoDB has this thing called MongoDB Atlas
0:26 which is database as a service,
0:28 and basically what you do, I haven't used this really,
0:31 but I have looked at it, is you create a AWS account
0:33 it was on web service, EC2 account,
0:35 you give them access to make machines and manage those machines on your behalf
0:40 and they can create a replica sets and things like that that are cure for you,
0:44 this is like a service that will manage more or less
0:48 your EC2 machines upon your behalf, so this is decent.
0:52 Another one is you can go to something like mlab over here
0:55 and you can check out the plans on pricing,
0:58 they have a free, sandbox free half a gig,
1:01 just cool when you do a shared one with light production work
1:06 for up to eight gigs of data, but it isn't a replica set with fail over and things like that,
1:12 so this is a pretty nice service, it's really expensive in my opinion
1:15 but it is pretty much turnkey, push the button
1:19 you get what you want, you get what you need.
1:22 I found it to be decent, but also it seems like it's added a lot of latency
1:28 to some of the apps that we moved off of our own servers on to mlab,
1:32 so I guess it probably depends, one on how much you pay,
1:36 and two, how close your machine is to their machine,
1:39 but they do claim to do a lot for half a million MongoDB deployments,
1:43 on the major cloud providers.
1:46 I just want to put it that like you can go and just get MongoDb as a service.
1:49 Now, if you're still with me, I'm assuming that you want to install
1:53 understand how to create your own MongoDB servers,
1:56 so let's go over here to download,
1:59 and we're going to go through a few interesting steps,
2:01 so I would like to do the Linux download, I know I'm on MacOS,
2:05 but I'm configuring this over here, now notice, I could hit the tarball
2:10 and this would do a thing, I could install this, I could run it,
2:14 but it wouldn't give me the ability to say automatically upgrade my server.
2:18 Right now it says instructions for installing with yum,
2:23 but I want to do this on this x64 version of Linux of Ubuntu,
2:30 16.04 that's the one I got, I think you can just take the same instructions
2:36 and apply them for 17.04 as well.
2:39 Now here's what we really want to go, we could click this,
2:41 we could get the binary, but this is better,
2:44 so we're going to come down here, and there's just going to be some copy paste action,
2:49 now look, it says what we can do is
2:52 you can just use aptitude to install this, so let's try that.
2:56 Before we actually go over here, tell me, which one of these is a MongoDB server,
3:03 I don't know, I don't remember either, so let's take just a moment
3:06 and step back and give these names, and I want to give them
3:09 the exact same name as they believe their machine names are,
3:12 so this one, the web server, it refers to itself as a web server,
3:17 this one its local machine name is this, themongoserver
3:22 so let me open this one up, now we should probably
3:25 enable floating ips for real production,
3:28 but this is not real production this is me playing around
3:32 so I'm not going to mess with that.
3:35 We could also enable what are called cloud firewalls,
3:38 but again, this is the Digital Ocean specific thing,
3:41 you do this in EC2 differently, you do this in Azure differently and so on,
3:43 so I didn't want to show you how to just use the Linux tools to do that
3:46 but it may be better actually to do this,
3:49 here you can see some of the monitoring kicking in
3:52 so I'd like to be able to say ssh root@ themongoserver, right
3:55 and sadly, it doesn't work, so let's tell this machine,
4:00 let's do a sudo, and I'll run visual studio code again, it's /etc/host
4:08 here you can see I have hacked a few things together already,
4:12 and we're going to go and put this, the Mongo server in here
4:16 and what is its ip address, of course like I said,
4:19 give it a floating ip and use that one possibly
4:22 but we're going to go like this, if you want to give it a real domain name
4:27 feel free to go ahead and do so, but this will work for,
4:30 there's probably no reason to give your MongoDB like a public dns name
4:35 so I'm going to suggest that maybe you don't do that.
4:38 Let's go here and get the web server,
4:50 okay, so I save that, now let's try that again,
4:54 we've never connected to a machine called themongoserver with this key
4:58 so it's fine, and now we're back,
5:02 so now we can say connect to root@themongoserver,
5:06 and at thewebserver, that's what I called it right, thewebserver.
5:10 This will make things easier and you can see even on that machine,
5:14 it believes it's called this, for some of the tricks we do later with tunneling ssl,
5:18 it turns out that makes our life a little bit easier.
5:22 Okay, so we're on the mongo server, that was our goal
5:25 maybe a little bit long to get here but that was our goal.
5:28 The next thing to do is we're going to go down this list that they gave us here,
5:33 so we are going to do is ssh in here and play this,
5:36 so it says what you can do is to install MongoDB
5:42 is you can install this aptitude package
5:45 and then you can actually install smaller pieces,
5:47 like we could install say just the server, right
5:50 or maybe just the sharding deamon things like that,
5:53 but if you install this you kind of get all of it,
5:55 and it's going to be amazing except for that it's not,
5:58 it's not amazing it all, it's not there,
6:00 because this comes from one of mongoDB's own app update servers,
6:04 so we got to go down here and go through the steps,
6:07 so the first thing we have to trust, trust MongoDB
6:10 we're going to stall the software as root,
6:13 I guess we're going to have to trust it anyway aren't we.
6:16 Then all seem to come out alright,
6:19 be careful here, I always screw this up,
6:22 even though I clicked on install for 16.04, it gives me all the options here
6:28 so don't do that, that's 12, 14, 16, that's done.
6:35 Now the next thing to do is run apt update,
6:39 I'm already in root, so I don't need sudo
6:43 so we needed to do that basically to pull from that list we just added there,
6:50 so now let's see what it's asking about, it's all good.
6:58 Alright, so now we can go do that apt install mongodb.org,
7:04 and what happens— magic is going to happen, that's what.
7:09 Notice when I said this one, it's like a metapackage,
7:12 it's really installing those four, it just said
7:15 hey here's an empty package with these four dependencies.
7:18 Alright, that was quite quick, and notice we have 3.4.5
7:25 so that is quite a recent one here,
7:28 and it's even created a mongodbuser for us
7:31 that is the one I believe that runs the deamon process
7:33 so it is not running his route, that's pretty awesome,
7:36 it's another thing you'd have to do
7:38 if you just downloaded the tarball and tried to set it up.
7:40 Very cool, and now next time I come over here
7:42 and I run apt update and then upgrade
7:45 that could potentially install 3.4.6 or whatever is next.
7:51 Do we have MongoDB— I could type Mongo and something happens
7:54 except fail, no you cannot connect; why— because it's not running,
7:59 it will run though if we just say service mongod start
8:04 then we can ask status, and notice, it's running this process,
8:13 it's running the server in quiet mode, especially important using this configuration file
8:19 so we're going to be able to use that basically to configure or to adjust to the server
8:24 all the changes we need to make to MongoDB
8:26 we're just going to edit that file and it'll be golden,
8:29 but for now, let's just try to see if we can connect it.
8:31 Wow, we can, we get a few warnings
8:34 like you really should not put this on the open internet, you really shouldn't do that
8:38 and some other stuff that we might consider about changing our file system around
8:43 so we can say things like show db's and it just has the local stuff
8:49 but we're connected and it's all good.
8:52 So, that's installing MongoDB on our cloud server.
8:56 However, you want to be extremely careful about changing this
9:04 we're not ready to open this up, not even close,
9:07 we can see here's the log file if we want to go and get the log
9:12 here's where the data is stored,
9:15 you generally don't need to go in there and mess with the data
9:18 you don't need to mess with the files directly,
9:20 we'll use the tools or replication or something to back up and configure the data
9:24 but that's where it lives and you can change where it is if you need to, right
9:28 so those two things are interesting, we're going to go change this stuff
9:31 but we need to make a few configuration changes before we go and do that.