High Availability Vs Fault Tolerance: Zero Down Time

Hello again. So after enabling the fault tolerance in this virtual machine and you see that it still work without any problem. Now we need to know where is it? The second virtual machine that we created through the fault tolerance. If you check this one exists in the esxi one and we don't see any secondary virtual machine right here. And that's logically the secondary virtual machine. We're not going to show up right here because it is already exists as a primary virtual machine. So how we see the secondary virtual machine, we go to the ESXi one in this situation, A-6e one have the Windows XP. Number four, we go to the ESXi one and in the virtual machine we check right here. We see that this virtual machine, Windows XP four, call it primary. This is the virtual machine that we use right now. If we click on it, it will take us to the virtual machine. And this is as a primary. So the secondary virtual machine that we configured when we enable the fault tolerance is in the ESXi two. So we go to the sky two and here we see that we have another virtual machine exists between XP four secondary let's mean this is the secondary virtual machine of the primary one. So if we click on it to check the option of this one, it will take us to the same virtual machine. So no, it's the same virtual machine exists in double host running in the esxi one and in the esxi two at the same time. Also, if we try to check the data store, for example, this one. The lawn. Number two, if you remember, we create the virtual machine for into lot number two here is it so it exists in the line number two. And if we check line number one, we see that we have Win XP number four. It's exists in double learn the hard driver and data exists in this one and the same exists in the line number two. But mean in a situation that we have a other file in the LAN. Number one, he keep connected to the LAN number two without any problem here is it The data and the vmdk file exists in this one. So the same in LAN number two. So we have a new height of ability of the virtual machine that exists in two shared storage. If something wrong happened to one of the storage, we have another one available in the second storage and also exist in two esxi host. If something wrong happened to the esxi one, it will keep working from the esxi number two. So this virtual machine running in the esxi host number one in the environment it's running right now and in the esxi host number one, because this is the primary one that we work on this. So we're going to try to make this virtual machine out of service and see what will happen to the virtual machine, like what we did in the height availability When we power off a host that have a virtual machine, we see that the virtual machine disconnected. Then it start rebooted again. But now as we want to have zero downtime, let's check the fault tolerance what we're going to do. So for that we're going to use the ping to check the availability of the virtual machine, Windows XP number four. So you see this is the IP address of this virtual machine. So we're going to send a ping to this IP 115 and we'll make it ultimately to check the availability of this virtual machine. So you see it is available right now. So if we check the Windows XP number four here is it it's work perfectly. Let's try to make some editing. This is a test of fault to relaunch. Like that. Let's mean this virtual machine is work without any problem and exist in the sky. One and will. See, that's if something wrong happened to the one, what will happen to this virtual machine? So I will go and try to power off the esxi one to create a problem right here. So this is the one I try to. Power off. Of course, it will take a little time to power off. And we check that the virtual machine still available without any problem. So here is it. You see, the sky one is out of service and you see it's a little time. Then it's back to the work without any problem. If we check the virtual machine, of course we need to refresh. But the console right here still available. The console that connects directly to the virtual machine still available. Only the browser that have that issue. So the virtual machine still work, the file still open and the a-6e one is out of service, the connectivity still available without any problem. So let's check what's happened right here. The fault tolerance migrate the connection from the Windows XP number four that exists in the ESXi one to the Windows XP four that exists in the esxi number two. So now when we click on this Windows machine, it shows us ESXi two. If we try to check the ESXi two that have a secondary virtual machine, no, it's become a primary virtual machine. Then if we check this one that was before. It is not show any tank inside it because it is disconnected. So now you see that the Windows XP number four, that was secondary became a primary. And you see right here an alert message. Of course, we can check this alert message from the monitoring virtual machine for on state change it. That means something wrong happened to this virtual machine. You need to check your environment to know what's happening. So this is an example of the fault tolerance in a real environment. So next, we'll try to power on the esxi host and see what will happen again with the fault tolerance. So see you in the next video.