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Chapter 3. Accessing Red Hat Gluster Storage using Microsoft Azure
The architecture of Microsoft Azure itself shapes the way solutions are designed. Microsoft Azure offers a cloud service that can function either as a platform-as-a-service (PaaS) or infrastructure-as-a-service (IaaS) environment. For Gluster Storage, the cloud service should be an IaaS layer that provides a logical container to deploy virtual instances to. Within the IaaS container, Microsoft Azure provides network services like DNS and DHCP, which makes managing the virtual instances similar to managing a physical deployment.
![integration Architecture](https://access.redhat.com/webassets/avalon/d/Red_Hat_Gluster_Storage-3.5-Deployment_Guide_for_Public_Cloud-en-US/images/5d523a9903295029c932af87cb22e5d3/Azure_Architecture.png)
Figure 3.1. integration Architecture
cloudapp.net
domain. Access to instances inside the cloud service is done by specifying the cloud service name and TCP port (endpoint). Most typically, this is SSH access. For example, you may have 30 virtual instances running inside a cloud service, so accessing them individually is done by exposing a different endpoint for each instance: 50,001
links to port 22 on instance A, and 50,002
links to port 22 on instance B.
![Microsoft Azure and Red Hat Gluster Storage workflow](https://access.redhat.com/webassets/avalon/d/Red_Hat_Gluster_Storage-3.5-Deployment_Guide_for_Public_Cloud-en-US/images/ab7566b5627965b303551bf090106963/Azure_Architecture1.png)
Figure 3.2. Microsoft Azure and Red Hat Gluster Storage workflow
Important
3.1. Image Profile and Sizing
Note
/mnt/resource
and is configured by the Windows Azure Linux Agent to provide swap space and temporary storage for applications.
- A virtual disk has a maximum size of 1023 GB. Larger disk sizes can be accommodated by aggregating multiple 1023 GB disks together.
- Once a disk has been defined, its size cannot be changed easily. Because capacity costs in Microsoft Azure Standard Storage are based on use, not allocated space, it is recommended that all disks assigned to a Red Hat Gluster Storage node are 1023 GB.
- Although attributes like CPU, RAM, and disk count can be easily changed after an instance is created, networking characteristics cannot. When planning your configuration, consider the network topology and connectivity you need before the instance are created. Microsoft Azure instance supports multiple network cards and multiple virtual networks, but these types of advanced networking features are only configurable using the Windows Powershell.