Dedicated Cloud in the spotlight
On June 27th, the first live chat took place covering Dedicated Cloud, the OVH cloud infrastructure solution. François Loiseau (<fluatovh>), SysAdmin and cloud computing specialist answered users' questions for one hour. Here's a summary of the questions and answers by topic.
<fluatovh>: Dedicated Cloud is a hypervisor as a service. OVH provides and maintains a preinstalled and fully functional hypervisor (Hyper-V for Microsoft/ESXi for VMware) as well as a management centre (Virtual Machine Manager, Azure/vCenter or vCloud). OVH has enhanced Dedicated Cloud with a number of services enabling you to focus on your business and manage your virtual machines - all on hardware which is totally dedicated and isolated from other servers.
Dedicated Cloud vs Dedicated Servers
<fluatovh>: With Dedicated Cloud, you get a Service Level Agreement (SLA) of nearly 100%, even 100% on some parts of the infrastructure. With this number of visits to your website, I imagine you're particularly looking for high availability for your infrastructure. Dedicated Cloud comes not only with highly available hardware, but also with many features that enable you to guarantee a maximum level of availability. For example, with VMware, you get HA (High Availability), FT (Fault Tolerance) and even affinity rules which enable you to spread your virtual machines across your hosts. By maintaining a high level of availability, you can rest assured that your 10,000 visitors won’t miss a single thing.
<fluatovh>: The advantage of Dedicated Cloud is the fact that you can consolidate your infrastructure. For example, you could potentially move from five physical machines to two by optimising the resources used by the virtual machines.
Choosing your range and hypervisor
<fluatovh>: Hi. Can you tell me more about the isolation preferences of the customers using your CRM?
<fluatovh>: The best way to choose between the Infrastructure and Enterprise ranges, aside from choosing the processor, is by deciding whether you want a VXLAN (based on Nexus 1000v) or a VLAN. You isolate your customers using either a VXLAN or a VLAN. Keep in mind that if you build a firewall in front of the LANs, you can trunk your firewall if you use a VLAN. You should deploy a network interface via VXLAN when using this technology.
<fluatovh>: These days, you can create up to 4000 VLANs per virtual datacentre by yourself, with no restrictions. You can even call them what you like. You can add as many VMs as you want to the VLAN trunk directly on the virtual VMware switch. In terms of VXLANs, you're actually limited by the Nexus 1000v to a maximum of 2048 VXLANs, and you add and remove them via an interface.
<fluatovh>: The ability to support your users depends mainly on the traffic. But don’t worry – if host M isn't enough, you can always get a host L - or even two - in less than five minutes!
Retaining IPs when migrating to Dedicated Cloud
<fluatovh>: It's now possible to move failover IPs from a dedicated server to Dedicated Cloud in one click. However, each IP is attached to its dedicated server. You always have the option to use API v6 in a small loop to resolve your issue with the number of domain names.
Differences between hosts M and L in shared storage access
<fluatovh>: Yes, there is no denying that there's a difference between a 1 Gbps card and a 10 Gbps card, but the question to ask yourself is “will my VM I/O reach 10 Gbps?"
<fluatovh>: Opting for hosts L and removing hosts M will enable you to benefit from pack L. Our billing robots will automatically recognise that you have hosts from the same category, so you'll continue to receive benefits of the pack.
<fluatovh>: That’s exactly right. And if you want to handle temporary loads, you can even add on an XL for an hour and remove it afterwards - you will be charged by the hour.
<fluatovh>: The licence is actually attached to an IP, not a VM. You can add a licence to the IP of your choice in the Web Control Panel. This means that you only need to make sure that you can add an IP to the VM in question.
<fluatovh>: I’d recommend that you get one licence per IP. In fact, you can easily move an IP from one VM to another in Dedicated Cloud. As the IP is routed to the VLAN of the VMs (VM Network), it doesn’t matter which VM supports the IP.
<fluatovh>: No, not yet. We're working on a more powerful panel of preconfigured VMs. For now, we have a handful of ready-to-use VMs so that customers can quickly get to work when their Dedicated Cloud is set up. Plesk is on our to-do list.
<fluatovh>: So far, the OVH Academyevents have taken place in Paris and Lille. Please let Hélène Caraux know about your needs for these training days. We are working on making them available in other regions.