Docker and K8S

Golang, Docker and Kube Practise session

Kubernetes 1.6+

Quotes to spice my work

“Innovation is taking two things that already exist and putting them together in a new way.”

• Tom Freston

“What's measured improves” ― Peter Drucker

“It's not about your resources, it's about your resourcefulness .”

• Tony Robbins

https://en.wikipedia.org/wiki/Peter_Drucker

Red Green Refactor https://quii.gitbook.io/learn-go-with-tests/

Learn -> adapt -> document -> share

Docker Desktop alternate

https://github.com/abiosoft/colima

colima start
docker build . && docker ps -a 
colima stop

Helm

brew install helm

Automated PR

brew install github/gh/gh
git add .
git commit -am "just testing"
gh pr create -f

Go WorkSpace

Go1.18 feature of Go Workspace is enabled here.

cd ~/code/Devops
cd ..
go work init ./Devops (Note go.wrk file will be created, and ENV variable was assinged)
go work sync

Create Nginx Service

helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx
helm repo update

https://github.com/kubernetes/ingress-nginx/tree/master/charts/ingress-nginx

helm install -f minikube/nginx/values.yaml nginx ingress-nginx/ingress-nginx

$ minikube service ingress-nginx-controller  --url
http://192.168.99.100:32080
http://192.168.99.100:31443
http://192.168.99.100:32443

Add awesome-http.example.com in /etc/hosts to connect local

curl http://awesome-http.example.com/dev
curl http://awesome-http.example.com/dev/metrics

Kind environment

Install colima from pervious steps, to run Kind we need docker engine is running.

colima start

Testing in kind cluster, port mapping required for docker image of Kube worker node. So please make sure extraport mappings are added in the kind/config.yaml Remember to add in /etc/hosts (to nginx to work)

Follow the document

https://github.com/ranjith-ka/Devops/tree/master/kind#kubernetes-in-docker-kind

CONTAINER ID        IMAGE                   COMMAND                  CREATED             STATUS              PORTS                       NAMES
89c1110261bb        kindest/node:v1.16.15   "/usr/local/bin/entr…"   13 minutes ago      Up 13 minutes       127.0.0.1:65273->6443/tcp   openfaas-control-plane
84a1f8bc9b54        kindest/node:v1.16.15   "/usr/local/bin/entr…"   13 minutes ago      Up 13 minutes       0.0.0.0:32080->32080/tcp    openfaas-worker

$ helm install -f minikube/dev/canary.yaml canary-dev charts/dev
$ helm install -f minikube/dev/prd.yaml prd-dev charts/dev

$ curl -s -H "testing: always" http://awesome-http.example.com/dev
Welcome to my canary website!%

$ curl -s -H "testing: never" http://awesome-http.example.com/dev
Welcome to my prod website!%

Install Cobra

Dadjoke CLI Tool

• Text tutorial: https://divrhino.com/articles/build-command-line-tool-go-cobra
• Video tutorial: https://www.youtube.com/watch?v=-tO7zSv80UY

Just trying out the tutorial

cobra init --pkg-name github.com/ranjith-ka/Devops
go mod init github.com/ranjith-ka/Devops

Add new command

cobra add random

Used below to convert JSON To go Struct online.

https://mholt.github.io/json-to-go/

Added the Pluing REST Client for postman things.

ctrl + alt + M -- Stop the running code.

Go Learning

https://github.com/StephenGrider/GoCasts

YAML remove comments

Remove all comments https://marketplace.visualstudio.com/items?itemName=plibither8.remove-comments

Mongo

To run mongo in local MAC, run the Make commands, this will be helpful for local testing. make run-mongo

Clean the logs, kill the process if not required.

GIT FLOW

I created GIT FLOW using the same nvie git flow, but added two release to understand better.

sequenceDiagram
    autonumber
    Alice->>John: Hello John, how are you?
    loop Healthcheck
        John->>John: Fight against hypochondria
    end
    Note right of John: Rational thoughts!
    John-->>Alice: Great!
    John->>Bob: How about you?
    Bob-->>John: Jolly good!

Operators

https://developers.redhat.com/author/deepak-sharma