Technical Blog


Technical and Product News and Insights from Rackspace

Bringing the cloud to the edge

The internet of things (IoT) keeps expanding and creating opportunities in many different areas and thereby shaping new business models that meet customers’ needs. Opportunities, productivity, and growth all rely on data.

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LACP bonding and Linux configuration

This blog introduces Link Aggregation Control Protocol (LACP) bonding and provides step-by-step configuration of LACP bonding on Red Hat Enterprise Linux (RHEL) and CentOS operating systems versions 6 and 7.

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Neutron networking: Neutron routers and the L3 agent

In this multi-part blog series I intend to dive into the various components of the OpenStack Neutron project and provide working examples of networking configurations for clouds built with Rackspace Private Cloud powered by OpenStack on Ubuntu 12.04 LTS.

In the previous installment, Neutron Networking: VLAN Provider Networks, I provided guidance on configuring networks in Neutron using VLAN tagging. In this fourth installment, I’ll describe how to combine flat or VLAN provider networks with GRE-based tenant networks using the L3 agent and Neutron routers.

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Neutron networking: VLAN provider networks

In this multi-part blog series I intend to dive into the various components of the OpenStack Neutron project, and to also provide working examples of networking configurations for clouds built with Rackspace Private Cloud powered by OpenStack on Ubuntu 12.04 LTS.

In the previous installment, Neutron Networking: Simple Flat Network, I demonstrated an easy method of providing connectivity to instances using an untagged flat network. In this third installment, I’ll describe how to build multiple provider networks using 802.1q vlan tagging.

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Neutron Networking: Simple flat network

In this multi-part walkthrough series, I intend to dive into the various components of the OpenStack Neutron project, and to also provide working examples of multiple networking configurations for clouds built with Rackspace Private Cloud powered by OpenStack on Ubuntu 12.04 LTS. When possible, I’ll provide configuration file examples for those following along on an install from source.

In the previous installment, Neutron Networking: The Building Blocks of an OpenStack Cloud, I laid the foundation of the Neutron networking model that included terminology, concepts, and a brief description of services and capabilities. In this second installment, I’ll describe how to build a simple flat network consisting of a few servers and limited networking gear. Future installments will include VLAN-based provider and tenant networks, GRE-based tenant networks, Open vSwitch troubleshooting, and more.

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Neutron networking: The building blocks of an OpenStack Cloud

In this multi-part walkthrough series, I intend to dive into the various components of the OpenStack Neutron project, and to also provide working examples of multiple networking configurations for clouds built with Rackspace Private Cloud powered by OpenStack on Ubuntu 12.04 LTS. When possible, I’ll provide configuration file examples for those following along on an install from source.

In this first installment, I’ll briefly highlight Neutron features and terminology that will be useful for later installments. Future installments will include VLAN-based provider/tenant networks, GRE-based tenant networks, Open vSwitch troubleshooting, and more.

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Protect your infrastructure servers with bastion hosts and isolated Cloud Networks

This guest post was contributed by Mr. Brandon Philips. Brandon is part of a small team of Rackers getting the Rackspace Cloud Monitoring Agent ready for launch. The Agent helps customers monitor the internals of their servers and application. You can check out his site at http://ifup.org, find him at local San Francisco meetups and check out his code on Github.

The public internet can be a scary place for servers. Log files of servers attached to public addresses shows regular port scans and URL snooping. These log entries are the inescapable reminder that your hosts are always one misconfiguration away from disaster.

This guide teaches you how to create a bastion host and an isolated cloud network, so you can reduce the number of servers that have to encounter these threats.

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