Audi, BMW & Daimler Partner on 5G For Cars
Wireless operators are noticeably absent from the group so far.
Docker 1.12 swarm mode elastic load balancing
Docker Built-In Orchestration Ready For Production: Docker 1.12 Goes GA describes the native swarm mode feature that integrates cluster management, virtual networking, and policy based deployment of services.
This article will demonstrate how real-time streaming telemetry can be used to construct an elastic load balancing solution that dynamically adjusts service capacity to match changing demand.
Getting started with swarm mode describes the steps to configure a swarm cluster. For example, following command issued on any of the Manager nodes deploys a web service on the cluster:
docker service create --replicas 2 -p 80:80 --name apache httpd:2.4And the following command raises the number of containers in the service pool from 2 to 4:
docker service scale apache=4Asynchronous Docker metrics describes how sFlow telemetry provides the real-time visibility required for elastic load balancing. The diagram shows how streaming telemetry allows the sFlow-RT controller to determine the load on the service pool so that it can use the Docker service API to automatically increase or decrease the size of the pool as demand changes. Elastic load balancing of the service pools ensures consistent service levels by adding additional resources if demand increases. In addition, efficiency is improved by releasing resources Continue reading
Being an Effective Interviewer
One challenging aspect of being an engineer is interviewing other engineers. The interview process is rife with various problems, including the discomfort of interviewing someone who you perceive as being a better engineer than you are, or figuring out how to draw out actual engineering skill versus simply finding out how much someone has memorized. Does that CCIE or degree on their resume really mean anything? What does an effective network engineering interview look like?
There are, of course, several different theories “out there.” For instance, some companies focus on giving candidates “real world” problems to solve, and checking with them several days later to see how they’ve done. This is potentially useful, but quite often I find my best work is done with a team, rather than by myself. Such systems seem to tend towards pitting the candidate against well known or well established problem sets, which can easily revert back to memorization skills, or towards difficult/obtuse problems. Either way, this doesn’t test the candidate’s ability to work in a team, or interact with others in solving difficult problems.
What about tossing other sorts of puzzles towards the candidate to see how they do? This also seems problematic Continue reading
Dialogic Tests Its Virtual Network Functions With OPNFV Code
It wants to use COTS servers more efficiently.
A DevOps Primer for Service Providers: 10 Key Technologies You Should Know
This paper explores the top DevOps primer tools and technologies that service providers are leveraging on a daily basis.
Weaveworks Adds Auto-Firewalls to Its Container Networking
Piggybacking off of Kubernetes 1.4
Unwrapping Tangled Device Configurations – A10 Networks Edition
If you’ve ever tried to interpret an A10 Networks load balancer configuration, or some Cisco Modular QoS CLI
commands, you’ll know that doing so involves following references to other parts of the configuration, inevitably ones that appear earlier in the configuration than where you are now, using a display pager which doesn’t support a back
command to scroll up a page at a time. In short, it’s a huge pain. The same applies to Cisco ACE and CSM load balancer configurations. The modularity is beautiful and logical, but it’s a massive irritation to reverse engineer.
Spaghetti Configurations
I work regularly with A10 Networks load balancers. ACOS (the A10 OS) has a CLI and configuration format that’s very similar to Cisco IOS. Looking at a particular vPort (A10 terminology for a particular Virtual IP (VIP) and Port combination) and trying to figure out which real servers are related to it is irritating to say the least. Here’s an example of the configuration in the order it appears when you view it:
ip nat pool pool1 10.100.1.1 10.100.1.126 netmask /25 ! health monitor checkstatus method http url /status expect code 200 ! slb server server1 1.2.3.4 port Continue reading
Cloud Startup Iguazio Says Its Platform Can Crack Silos
The spectacular waterfalls of the Igazu River inspired the company’s name.