darrylcauldwell.com On a journey around the datacenter and public cloud.

DevOps != Products

The last 10 to 20 years in the enterprise has been defined by increasing capital spending on fixed assets (CapEx) while reducing the cost of staffing and operations (OpEx).  Gartner report the growth of spend on enterprise application software (EAS) is continuing to grow and in 2015 will grow at 7.5% to $149.9 Billion.  According to the Hardware Business Review in 2011 one in six IT projects had an average cost overrun of 200% and a schedule overrun of 70%.

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Project Bonneville - vSphere Integrated Containers

Working for a company which develops software for business I’ve been keen on following the story of containers unfold. The explosion of containers and microservices in the software development space has been a revolution in the way applications can be architected and deployed. This has put a great deal of power in the hands of the developer but with great power comes great responsibility for operational management.

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VMware Validated Design for SDDC

Historically VMware engineers and architects produce best practice documentation by way of reference architectures and whitepapers which are product and product version focused. As the VMware product portfolio is expanding to more of a suite of products under the banner Software-Defined Data Centre (SDDC) interoperability becomes more important and the best practice settings, testing and supportability becomes more complex.

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NSX Distributed Firewall Under The Covers

An NSX distributed firewall (dFW) runs as an ESXi host as a kernel module added as a VMware Installation Bundle (VIB). The dFW rules operate on Layer 2 through Layer 4; although this can be extended through Layer 7 by integrating with a 3-Party vendor.

  • L2 rules are based on MAC address L2 protocols like ARP, RARP and LLDP etc.
  • L3 & 4 rules are based on IP source/destination and L4 uses a TCP or UDP ports.
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VSAN On Array Not Support Pass Through Mode – Dell Perc 710P Mini

Several array controllers do not support pass through mode,  as such to use this will VSAN, we need to create a single disk RAID0 group for every SSD and HDD.

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