Skip to main content

Kubernetes: Scale Every Application


SCALING: Changing the number of replicas in a Deployment.

The Deployment only created one Pod to run our application, and that just won't do. We need more when traffic increases.

When you scale, you make sure new Pods are created and scheduled to Nodes who have the resources.

Scaling in will "reduce the number of Pods to the new desired state".

"Can we do this automatically?" Yes! But not now.

Running multiple application instances require a way to distribute traffic to them all. There is an integrated load-balancers with Services to do so, and they will continuously monitor the running Pods with endpoints, ensuring the traffic is sent only to available Pods.





What’s deployed?

(It’s still kubernetes-bootcamp, and is has one (1) Pod)

Now the tutorial wants to talk about what the columns mean.

DESIRED: Configured # of replicas.

CURRENT: How many replicas are running.

UP-TO-DATE: Replicas updated to match the configured state.

AVAILABLE: How many replicas can users actually make use of?

All of these columns have the number 1 in them.

Now, let’s replicate. How does four sound?


After get deployments, our numbers have increased from 1 to 4.


So have our Pods!


Labels:

Comments

Post a Comment

Popular posts from this blog

Making KPI Dashboards with PowerBI

 While this is the free tier, I cannot share or collaborate with others, nor can I publish content to other people's workspaces, but they will not stop me from screenshooting and recording these self-taught adventures,so! I'm doing this because I idly searched "Mattel careers" and "Information Technology", and seeing a bulletpoint saying the following: Analytical and reporting skills such as creating dashboards and establishing KPIs such as experience with PowerBI, Cognos, Tableau, and Google Data Lake/AWS is preferred And thought "Well, I've used Tableau, and I've heard about PowerBI,  even if its in-demandness is questionable , so how similar is it? And can I write about it?"  First, PowerBI (PIB) does have a downloadable, local version, but apparently Windows-only. I could download the .exe but I couldn't run it / drag it to applications on my MacBook.  Not a problem, we'll use the online SaaS version, and a dataset found here, ...
Post a Comment
Read more

Connecting IoT Devices to a Registration Server (Packet Tracer, Cisco)

 If you're seeing this post, I'm helping you, and you probably have LI presence: React and share this post to help me in return.   In Packet Tracer, a demo software made by Cisco Systems. It certainly has changed a lot since 2016. It's almost an Olympic feat to even get started with it now, but it does look snazzy. This is for the new CCNA, that integrates, among other things, IoT and Automation, which I've worked on here before. Instructions here . I don't know if this is an aspect of "Let's make sure people are paying attention and not simply following blindly", or an oversight - The instructions indicate a Meraki Server, when a regular one is the working option here. I have to enable the IoT service on this server. Also, we assign the server an IPv4 address from a DHCP pool instead of giving it a static one. For something that handles our IoT business, perhaps that's safer; Getting a new IPv4 address every week or so is a minimal step against an...
Post a Comment
Read more

AWS Infrastructure Composer

 A very brief look. The text says; Drag and drop any CloudFormation resource on a visual canvas Connect and configure enhanced components to automatically build IaC for an application architecture Seamlessly transition between authoring workflows visually with Step Functions Workflow Studio and defining resources with Infrastructure Composer Integrate your browser with your project through “local sync” or use Composer in the AWS Toolkit for Visual Studio Code In 2019 there was a similar tool to build infrastructure that would be converted to code. Nice to know they bought it back. When you enter the Composer, it's a blank space with a background reminiscent to the screen for Cloud Formation. Infrastructure Objects are to the left in a drawer;  I've selected a bucket that I can rename. I went to connect a bucket to a Dynamo DB Table, and it's not available yet. It also lost a bucket somewhere in the ether of the GUI. Ah well. I couldn't find the EC2 instance in the...
Post a Comment
Read more