‫So let's have a look
‫at the EBS volumes attached to our instance.
‫So if you click on instance
‫and then you go to the storage tab in here,
‫you find that there is a root device
‫and there's a block device on it.
‫As you can see, we got one volume
‫of eight gigabytes currently attached
‫into our EC2 instance.
‫So what I can do is I can click on this volume
‫and it will take me into the volumes interface of AWS.
‫And we can see that, yes, indeed,
‫our volume exists and it's there.
‫It's in use as shown here
‫and it's attached to an instance right here.
‫So we have a different kind of console here
‫and to access it, you can just go on the left hand side
‫and click on volumes.
‫So as we can see, now we have one EBS of eight gigabytes
‫and what I can do is I can create a second volume.
‫So let me create a volume
‫and I will have many options to choose from,
‫GP2, GP3 and so on
‫but I will just use GP2 of type of size two gigabytes.
‫And then for availability zone,
‫I can choose the same one where my EC2 instance is.
‫So for this, I'm gonna go into my EC2 instance, in here
‫and I will find which availability zone it is on.
‫So I scroll down,
‫and it is going to be in the networking one.
‫So I scroll down in the networking
‫and here, availability zone, it says eu-west-1b.
‫Therefore, the volume I will create
‫is going to be in eu-west-1b
‫because the EBS volumes are bound by specific AZ.
‫So that's good.
‫I will have it done and create this volume.
‫And now my volume is created.
‫And what I can do is if I can click on it,
‫this one is currently not attached.
‫Okay, so it's been creating
‫so let me refresh this to see if it's created.
‫Okay, it's available and it's not attached yet.
‫So therefore, because it's available,
‫what I can do is action
‫and then I can attach the volume
‫and we need to find an instance.
‫So we have one running right here.
‫And so we're going to attach this volume to my instance,
‫click on attach volume and voila,
‫our instance now has two EBS volumes attached to it.
‫How do we know?
‫Well, I can refresh this page,
‫go to storage on my EC2 console, scroll down.
‫As you can see now for block devices,
‫I have two block devices.
‫I have the one of eight gigabytes
‫and the one of two gigabytes.
‫To actually use this new block device,
‫it's a bit more complicated
‫and out of scope for this course,
‫but you can go to format EBS volume attach EC2,
‫and you should find something like, yes,
‫make an Amazon EBS volume available to use on Linux
‫and this gives you instructions on how to do it
‫but again, this is out of scope for this.
‫So now if I go into my volumes and I create a volume,
‫I can create a volume of two gigabytes of GP2
‫but this time the AZ is going to be eu-west-1a
‫and not eu-west-1b.
‫So it's gonna be a different AZ
‫than the one of my EC2 instance.
‫And the reason I do so is to show you
‫that right now, we have three GP2 volumes.
‫So let me refresh this.
‫So the last one is available and it's a different AZ,
‫so eu-west-1a.
‫And if I do actions and then attach volume,
‫as you can see, I cannot attach it to my EC2 instance
‫because my EC2 instance is in eu-west-1b.
‫And so therefore, we can see that the EBS volumes
‫indeed are bound by a specific availability zone.
‫Lastly, what I can do is that I can take this volume,
‫do action, delete volume, and it's gone.
‫And that really shows you the power of the cloud.
‫I can just request volumes, delete volumes
‫right on the go in the matters of seconds.
‫Okay, so we have our two EBS volumes in here
‫and what I wanna show you now is a cool behavior.
‫So what happens if I terminate my instance?
‫Well remember, and I will show you again,
‫this one root volume of eight gigabytes
‫has the delete on termination attribute.
‫So how do we know?
‫Well, if I go into my storage
‫and then go to my block devices, into this table right here,
‫and scroll all the way right,
‫you see the first one has delete on termination yes
‫and the second one no.
‫So why this one is yes?
‫Well, I don't know if you remember,
‫but when you go through the process
‫of launching an instance, okay?
‫And then you scroll down to the storage,
‫in here, if you click on advanced,
‫you can see the fact
‫that it is your roots of eight gigabytes
‫and by default, this delete on termination attribute is yes,
‫which makes sense, but you could set it to no
‫if you wanted to keep the root
‫after terminating your instance.
‫So this explains why we see from before,
‫the yes in this table.
‫And so therefore, if I go ahead and terminate my instance
‫which I will, so it says successfully terminated
‫so it's going to really remove it from here.
‫I can go back into my EBS volumes.
‫I can refresh them.
‫And what's going to happen is that this one
‫soon is going to be available
‫so because it's going to be detached from my EC2 instance
‫and then it's going to be terminated.
‫So I'm going to pause until this is done.
‫And here we go.
‫So my eight gigabyte volume has now disappeared.
‫Only my two gigabyte volume is left
‫and if I go to my EC2 console,
‫well, it says that my first instance has been terminated.
‫So that's it for this lecture.
‫I hope you liked it
‫and I will see you in the next lecture.