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Kubernetes at Home on Raspberry Pi 4, Part 1
I mostly followed/was inspired by this tutorial but with some tweak/fix to recent(Sep 2019) software versions. Also this is a pure Linux walk-through as I don’t use a Mac. I planned to build a home Kubernetes(k8s) cluster and migrate home servers including the one this blog is running on to the k8s cluster, for a…
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Use FZF to Speed Up KUBECTL
FZF is general purpose option selector for Linux command line. By default fzf is an super-upgrade for the ctrl-r command history finder, but it is helpful for almost any scenario where you need to pick 1 item from a list. Here’s a tiny use case where I use fzf to select a kubernetes namespace and…
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AWS Lambda with Single CloudFormation Template
This is just a quick snippet of CloudFormation template to deploy a Python 3.7 Lambda function embedded in the template. The source code inside ZipFile can contain up to 4KB. # CloudFormation templateAWSTemplateFormatVersion: 2010-09-09Resources: LambdaCode: Type: AWS::Lambda::Function DependsOn: – LambdaRole – LambdaPolicy Properties: Code: ZipFile: | import boto3 def handler(event, context): … Role: !GetAtt LambdaRole.Arn…
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Golang and Docker Multi-Stage Build
I have noticed a common pattern amonst some new utilities such as kubectl, kops and terraform: There’s only 1 single executable file to install, and by ‘install’ it can be put anywhere as long as it’s in $PATH. This was before I learned some Golang but it’s easy to find out that the reason behind…
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Install Nvidia 396 Driver for Ubuntu 18.04
Just some quick notes to upgrade Nvidia driver from 390 to 396 on Ubuntu 18.04. By default Ubuntu 18.04 only has Nvidia driver 390. # add ubuntu official ppa for nvidia# all commands below run as rootadd-apt-repository ppa:graphics-drivers/ppaapt update# install 396 filesapt install nvidia-dkms-396 nvidia-driver-396 nvidia-compute-utils-396 libnvidia-compute-396# reboot at the end. After reboot, the new…
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Home VPN with OpenVPN
Here are step to run a simple OpenVPN service at home, so that I can access home network easily while not at home. First, clone the git repo for OpenVPN docker container: git clone https://github.com/kylemanna/docker-openvpn.git I can use the pre-built docker image from docker hub but it has just been breached so I’d rather build…
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Ansible, CloudFormation and Jinja2
CloudFormation is the corner stone to provision infrastructure in AWS with code, however it’s not very DRY, ie. poor modularization, almost static variables and templates. So here comes Ansible. However at the moment Ansible’s CloudFormation module doesn’t support Jinja2 in templates, like other modules do. Luckily there’s a work-around to get the Ansible-CloudFormation-Jinja2 trio working…
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Working with a Big Corporation
So it’s been a while since I started this job in a big corporation. I always enjoy new challenges, now my wish got granted. Not in a very good way. The things work in a quite different manner here. There are big silos and layers between teams and departments, so the challenges here are not…