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kubernetes

A collection of 12 posts

Windows containers how to...not?

Windows containers how to...not?

Things to know about Windows Containers This started as an initial research into Windows Containers. My initial impression was not fantastic, left wanting. * "Windows requires the host OS version to match the container OS version" (src) * This is in stark constrast compared to Linux containers, where you can trivially, swap

How to write a secure container

How to write a secure container

So, how do you write a secure container? Rule 1: Know where your data is coming from Common things to avoid: * Pulling images from public registries * Know your dependencies Solution: Maintain your own copy of dependencies, and keep up to date when new patches are released to adress security issues

The Kubernetes history- the project which almost never happened

The Kubernetes history- the project which almost never happened

"It's 2013. The environment in silicon vally was on the heels of the devops movement, automation tools were all the rage" - Kelsey Hightower, Principal Engineer, Google. The speakers in the 2022 Kubernetes documentary by Honeypot includes a fantastic list of speakers reflecting on the early days of Kubernetes and

Building a SaaS based architecture on a budget without vendor lock-in

Building a SaaS based architecture on a budget without vendor lock-in

Opinionated account on a micro SaaS currently processing ~53k api requests daily and ~£3k monthly. Actual code, real lessons learnt the hard way. I wrote about SaaS based architectures earlier in 2020 which goes into detail on the tradeoffs around multi tenancy. We reject: kings, presidents and voting.We believe

Docker tail -f from the end

Docker tail -f from the end

The docker way: docker logs -f --tail 10 container_name The host way $(docker inspect --format='{{.LogPath}}' # Then tail -f the file Ref * https://stackoverflow.com/questions/42510002/docker-how-to-clear-the-logs-properly-for-a-docker-container * https://stackoverflow.com/questions/52119832/how-to-tail-a-docker-log-from-the-current-position-in-the-log-without-seeing-the

How to install k0s kzeros Kubernetes

How to install k0s kzeros Kubernetes

K0 (kzeros) in a new single binary distribution model for running and deploying Kubernetes. The project is available on GitHub here: https://github.com/k0sproject/k0s The k0s project comes from engineers working on the original docker project and it's some aims include making ruining and deploying Kubernetes clusters as

FastAPI Production Deployment with Github actions & Dokku

FastAPI Production Deployment with Github actions & Dokku

This FastAPI tutorial shows you how to develop and deploy python FastAPI to a server with automated deployment & TLS using Github Actions. Based on this FastAPI deployment example repo. * Auto generated API Docs: OpenAPI & Redoc * Github actions deployment pipeline: Actions Workflow * Automated TLS certificate creation & renewal * Deployment to live url

How large public and private organisations are using teams, kubernetes, vault and git to manage their deployments

How large public and private organisations are using teams, kubernetes, vault and git to manage their deployments

This document sets out my observations of recently working in a large public sector environment in the UK managing significant workloads. This is also a good history comparing deployment practices of yesterday to more modern practices seen today I think there is a significant shift happening between organisations which are

Docker entrypoint vs cmd

Docker entrypoint vs cmd

I'm always forgetting what is the difference between Docker's entry point vs Docker cmd. Which one to use and when? Tldr: "You can use the exec form of ENTRYPOINT to set fairly stable default commands and arguments and then use either form of CMD to set additional defaults that are

Kubernetes updating many deployments at once

Kubernetes updating many deployments at once

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Scaling Kubernetes ReadWriteMany Ceph Deployments

Scaling Kubernetes ReadWriteMany Ceph Deployments

Run ReadWriteMany volumes on Google Kubernetes engine which allows your Deployments with persistent data to scale. This allows us to scale a Kubernetes deployment with Persistent Volumes without the deployment getting stuck waiting for a realease on a volume. This tutotial has a repo which has been pinned as a

Kubernetes SSL Certificates- How to Set-up a Cluster With SSL Termination

Kubernetes SSL Certificates- How to Set-up a Cluster With SSL Termination

Using Cert Manager on a Kubernetes cluster to do SSL termination. By the end of this guide you will be able to: * Route SSL traffic from a domain your own (example.com) to a kubernetes cluster * Understand how to add additional domains to your cluster * Certificate renewal is automatic, handled

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