NetScaler's future points toward containers and the cloud.
The battle between the Mesos and Kubernetes tools for managing applications on modern clusters continues to heat up, with the former reaching its milestone 1.0 with a “universal containerizer” feature that supports native Docker container formats and a shiny new API stack that is a lot more friendly and flexible than the manner in which APIs are implemented in systems management software these days.
Ultimately, something has to be in control of the clusters and divvy up scarce resources to hungry applications, and there has been an epic battle shaping up between Mesos, Kubernetes, and OpenStack.
Mesos is the …
Mesos Reaches Milestone, Adds Native Docker was written by Timothy Prickett Morgan at The Next Platform.
Went on an customer “ride-along” with Advanced Services this week. Customer’s requirement was that the DMVPN headend have 2 physical interfaces for High Availability. These 2 interfaces need to be the same subnet because they are going into 2 firewalls: one active/one standby. So now what?
Tom Kunath (Advanced Services) thought “Well…. what about using backup interface command?” Hmmmm that does seem to be the perfect tool in the Cisco CLI toolbox for this very situation.
Time to play in the lab!!!
So now let’s try it and see how per-tunnel QoS will work with it.
Class-Maps and Policy-Maps
NOTE: Snuck these configs from the QoS Chapter of the upcoming CiscoPress IWAN book a super dear friend of mine (David Prall) is co-authoring.
Apply to Tunnels
Okay…. so far so good. Now let’s run some traffic. I’ll send EF and AF41.
Send Traffic
Kay… so far so good. I also have both being sent at the same bps from the traffic generator so I wanted to check this also.
Time to Fail Primary Link!
Before I congest and see if the applied PerTunnel QoS can also drop. Let’s make sure Continue reading
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We've been following an increasing ephemerality curve to get more and more utilization out of our big brawny boxes. VMs, VMs in the cloud, containers, containers in the cloud, and now serverless, which looks to be our first native cloud infrastructure.
Serverless is said to be about functions, but you really need a zip file of code to do much of anything useful, which is basically a container.
So serverless isn't so much about packaging as it is about not standing up your own chunky persistent services. Those services, like storage, like the database, etc, have moved to the environment.
Your code orchestrates the dance and implements specific behaviours. Serverless is nothing if not a framework writ large.
Serverless also intensifies the developer friendly disintermediation of infrastructure that the cloud started.
Upload your code and charge it on your credit card. All the developer has to worry about their function. Oh, and linking everything together (events, DNS, credentials, backups, etc) through a Byzantine patch panel of a UI; uploading each of your zillions of "functions" on every change; managing versions so you can separate out test, development, and production. But hey, nothing is perfect.
What may drive serverless more Continue reading