ghulevishal

Create Ubuntu 16.04 VM

Install Docker with specific version 18.06 (That is supported by minikube)

sudo apt-get update

sudo apt-get install \

ghulevishal

1.Core Concept

Q1. Create a Multi-container Pod with name multi-c-pod, which contains containers from following images :-

• image1 : nginx:alpine
• image2 : redis
• image3 : memcached

You can have container names, as per your choice.

Q2. Create a Namespace with name mynamespace using YAML. Create a Pod with name mypod using nginx:alpine image, inside this mynamespace namespace.

ghulevishal

Keybase proof

I hereby claim:

• I am ghulevishal on github.
• I am vishalghule (https://keybase.io/vishalghule) on keybase.
• I have a public key ASD2pz71F9x33wKQlKLwzGk7-TwCKIt2QpGDF7Sa25qXKwo

To claim this, I am signing this object:

ghulevishal

apt-get update && apt-get install -y apt-transport-https curl
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
apt-get update
apt-get install -y kubelet kubeadm kubectl

ghulevishal

alias kc='kubectl'
alias kclf='kubectl logs --tail=200  -f'
alias kcgs='kubectl get service -o wide'
alias kcgd='kubectl get deployment -o wide'
alias kcgp='kubectl get pod -o wide'
alias kcgn='kubectl get node -o wide'
alias kcdp='kubectl describe pod'
alias kcds='kubectl describe service'
alias kcdd='kubectl describe deployment'
alias kcdf='kubectl delete -f'

ghulevishal

The procedure below is done on a CentOS 6.3 x86_64 hypervisor

1. Create qcow image:

qemu-img create -f qcow2 ubuntu-12.10-server-amd64.img 5G

2. Download Ubuntu server ISO:

wget "http://www.ubuntu.com/start-download?distro=server&bits=64&release=latest"

ghulevishal

Simple Python Flask app on Cloud Foundry

This is a (very) simple Flask application that shows how the built-in Python buildpack detection on Cloud Foundry works.

To push to Cloud Foundry, log in and then use

$ cf push myapp-name

Python on Cloud Foundry

ghulevishal

Get go 1.8.3:

wget https://storage.googleapis.com/golang/go1.8.3.linux-amd64.tar.gz
sudo tar -xvf go1.8.3.linux-amd64.tar.gz -C /usr/local/
mkdir -p $HOME/go/src
export GOPATH=$HOME/go
export PATH=$PATH:/usr/local/go/bin:$GOPATH/bin
go version

ghulevishal

Kubectl output options

Let's look at some basic kubectl output options.

Our intention is to list nodes (with their AWS InstanceId) and Pods (sorted by node).

We can start with:

kubectl get no

ghulevishal

Why I prefer CLI over UI ?

• CLI tools are Composable using pipes (great old school example http://www.youtube.com/watch?v=tc4ROCJYbm0&t=5m32s)
• Great for automation and batch processing
• Fewer mouse clicks. Can go futher using only keyboard
• Avoid cluky UIs especially over poor connections
• I'm insulated from UI changes
• Easier to debug as they are often more verbose than the UI

The DC/OS CLI (https://dcos.io/docs/1.7/usage/cli/)