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The following diagram shows the network architecture of this solution.
The following table describes the nodes in the architecture:
Node | Description |
KVM compute-only node: bond0 | This bond is configured with bridge networking for: Management and guest traffic |
KVM compute-only node: bond1 | This bond is for PowerFlex data networks. It is used for communication between PowerFlex compute and storage nodes. |
PowerFlex storage-only node: bond0 | This bond interface is for PowerFlex storage management and data network. |
PowerFlex storage-only node: bond1 | This bond interface is for the PowerFlex data network. |
At the physical layer, two supported Top of Rack (TOR) switches are used for redundancy and load-balancing purposes. A peer link is configured on both the TOR switches. VLANs are created to separate different traffic types on the network bonds.
CloudStack has two networking models, basic and advanced. This is decided based on the requirement. For this whitepaper, a basic networking model is used with the shared network concept.
In a Basic networking setup, the guest instances use the same IP range as the underlying CloudStack and hypervisor architecture.
For this whitepaper, CloudStack network bridges are used with KVM to connect the system VMs to the infrastructure, and guest instances to each other and the outside world.
The following figure shows an example of one of the KVM node network configurations:
Note: It is important to maintain a consistent configuration across all the hypervisor hosts.
For more information about networking details, see Beginner guide to CloudStack Networking and Network setup.
The following table shows the different networks that are configured for this solution:
Network type | VLAN ID |
Management | 105 |
PowerFlex Management | 150 |
PowerFlex Data 1 | 152 |
PowerFlex Data 2 | 153 |
Guest network | Based on the requirement |
Note: OS Management network must be routable to the PowerFlex Management network to access the PowerFlex cluster.