Network Redux reports

It is always exciting to see a combination of many open source platforms be merged into a unified client solution.

In building an N+1 environment for our friends at WebTrends, we have built a clustered storage environment without the presence of a SAN. Block level storage replication with fail-over services, all powered by open source. Lets take a closer look at the technologies in use for the backend MySQL based services…

Xen – Citrix XenServer powers the underlying virtualization fabric for the physical servers. The basic edition is all which was needed, at no cost the customer, as we can build in the HA features from within the stack. One tremendous advantage to the Citrix XenServer release is that the licensing can vertically scale in place, so if we need to move the licenses up to a more advanced edition (for virtualization provided HA) we can do this on the fly.

CentOS – Open Source and freely distributed version of the RHEL Advanced Server edition fully supported by our RHCE trained team.

DRBD – Block based storage replication over ethernet, in our case a private customer assigned VLAN.

Heartbeat – High Availability cluster management service to manage this environment, distributed across all involved nodes.

MySQL – Essentially a single MySQL instance unaware of the layers above it handling its fail-over.

The end result is an extremely cost effective and open source N+1 solution for MySQL HA, without the added management and configuration components of a MySQL cluster.

A win for the customer and the open source community. Expect to see an article in our answers section in the weeks to come.

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We will be performing maintenance on the Bladensburg hardware node.
There will be approximately 30 minutes of downtime as the device reboots and your container comes back online.
Scheduled maintenance window.

Window: Wednesday September 1st 7-8pm PDT
Projected downtime: 30 minutes
Activity: Kernel upgrade, BIOS upgrade, RAID controller and hardrive firmware upgrades.

UPDATE – Due to a lengthy RAID rebuild we are extending the window to 9pm PDT

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We will be performing maintenance on the Forage hardware node.
There will be approximately 30 minutes of downtime as the maintenance is preformed, the device reboots and your container comes back online.

Scheduled maintenance window.

Window: Wednesday September 1st 7:30-8:30pm PDT
Projected downtime: 30 minutes
Activity: Kernel upgrade, BIOS upgrade, Firmware on RAID controller and drives upgrade.

UPDATE – Due to a lengthy RAID rebuild we are extending the window to 9pm PDT

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We will be performing a kernel upgrade on the Bladensburg hardware node.
There will be approximately 5-10 minutes of downtime as the device reboots and your container comes back online.
Scheduled maintenance window.
Window: Wednesday September 1st 7-8pm PDT
Projected downtime: 5-10 minutes
Activity: Kernel upgrade
Thank You,
–
Network Redux, LLC
www.networkredux.com

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An internal adjustment to allow additional iptables modules will be made on all VPS containers on Gettysburg. Our scheduled maintenance window is between 7-8pm PDT — during this time all nodes will be restarted with an anticipated downtime of 1-3 minutes per node.Maintenance window:Thursday July 29th 7-8pm PDTServer:GettysburgExpected downtime:1-3 minutesUpdate 7:06pm PDT: This maintenance window is now complete.

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We are having an issue with WHM /cPanel on Northcarolina and are working to resolve it.
Update is in progress.

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