Author: EarpMoonWater

I like to write stuff about stuff I'm doing.

Lets save Martha aka MiniKube..

by EarpMoonWater, posted in docker, kubernetes

Goal:

The Bat signal has been lit in the sky, its time to suit up, & don’t let the kryptonite divide us. Fix the broken Minikube cluster

Lessons Learned:

  • Start up the Bat Mobile (Minikube)
    • See screenshot for a whole slew of commands
  • Create Object in YAML files to Confirm Cluster is up
    • Kubectl apply -f
    • Kubectl get po/pv/pvc

Start up the Bat Mobile (Minikube):

See screenshot for a whole slew of commands:

  • Minikube start
  • sudo chown -R
    • Change directory owner
      • .kube
      • .minikube
  • Minikube config set
    • Update the version
  • Sudo apt install -y docker.io
    • Get docker
  • Kubectl apply -f
  • Kubectl get
    • po
    • pv
    • pvc

Create Object in YAML files to Confirm Cluster is up:

  • Kubectl apply -f
  • Kubectl get po/pv/pvc

Blueprint to Build & Use a K3 Cluster

by EarpMoonWater, posted in kubernetes

Goal:

Wanna see how the sausage is made – – – K3 cluster. We’ll bootstrap a K3 cluster, install the K3 on multipler servers, & have it Frankenstein to form a multi-server cluster. Lets get cookin’

Lessons Learned:

  • Build that K3 server
    • Install K3 server
    • List nodes
    • Get node token
  • Build two (2) K3 worker nodes
    • Install K3 on worker node w/private IP address & node tokens
  • Run on New Cluster
    • Create pod yaml file
    • Create, check, & view pod

Build that K3 server:

  • Install K3 server
  • List nodes
  • Get node token

Build K3 worker nodes:

Install K3 on worker node w/private IP address & node tokens:

Run on New Cluster:

Create pod yaml file:

Create, check, & view pod:

Come on, lets Explore Terraform State w/Kubernetes Containers

by EarpMoonWater, posted in docker, kubernetes, terraform

Goal:

Let’s blend some pimp tools together & launch something into space – cyber space that is. Below is an example to show useful it is to understand Terraform state, deploy resources w/Kubernetes, & see how Terraform maintains the state file to track all your changes along w/deploying containers!

Lessons Learned:

  • Check Terraform & Minikube Status
  • Clone Terraform Code & Switch Proper Directory
    • Switch directories
  • Deploy Terraform code & Observe State File
    • Terraform Init
    • Terraform Plan
    • Terraform Apply
  • Terraform State File Tracks Resources
    • Terraform State
    • Terraform Destroy

Check Terraform & Minikube Status:

  • terraform version

Clone Terraform Code & Switch Proper Directory:

Switch directories:

Deploy Terraform code & Observe State File:

  • Terraform –
    • Init
    • Plan
    • Apply

Terraform State File Tracks Resources:

Terraform Plan:

Terraform Apply:

Terraform Destroy:

A sprinkle of MiniKube & a pinch of Helm

by EarpMoonWater, posted in Helm, kubernetes

Goal:

So you got a Minikube cluster right? Now lets use Helm to deploy a microservice stack!

Lessons Learned:

  • Start Minikube Cluster
  • Unpack Helm, Move-it, Install, & Init
    • tar -xvzf ~/helm.tar.gz
    • sudo mv
    • Sudo helm init
  • Install Namespace w/Helm
    • sudo kubectl
    • sudo helm install
    • sudo kubectl
  • Edit to use Nodeport & Configure Nginx to Proxy

Start Minikube Cluster:

Edit to use Nodeport & Configure Nginx to Proxy:

tar -xvzf ~/helm.tar.gz:

sudo mv:

Sudo helm init:

Install Namespace w/Helm:

Sudo kubectl:

Sudo helm install:

Sudo kubectl:

Edit to use Nodeport & Configure Nginx to Proxy:

Part 2: Monitoring Containers w/Prometheus

by EarpMoonWater, posted in docker, Prometheus

Goal:

Context:

Lets show how you can help a team migrate their infrastructure to Docker containers..

Part 2 Activities:

Monitor the new environment w/Docker (stats) & Prometheus, you can see how to utilize a cool feature like Docker Compose & cAdvisor.

Lessons Learned:

  • Create a Prometheus YAML File
    • vi prometheus.yml
  • Create a Prometheus Service
    • vi docker-compose.yml
    • docker-compose up -d
    • docker ps
  • Create Stats Shell
    • Investigate cAdvisor
    • Stats in Docker
    • Doper Stats

Create a Prometheus YAML File:

  • Collect metrics & monitoring using Prometheus/cAdvisor to deploy containers using docker-compose

vi Prometheus.yml:

Create a Prometheus Service:

vi docker-compose.yml:

docker-compose up -d:

docker ps

Create Stats Shell:

Investigate cAdvisor:

Stats in Docker:

  • docker stats

Doper Stats:

  • vi stats.sh
  • chmod a+x stats.sh

Part 1: Use Grafana w/Prometheus for Alert & Monitoring

by EarpMoonWater, posted in docker, Grafana, Prometheus

Goal:

Context:

Lets show how you can help a team migrate their infrastructure to Docker containers..

Part 1 Activities:

See how to utilize Prometheus to monitor your toys (containers). Then you can use the gangster tool of Grafana to visualize & alert!

Lessons Learned:

  • Pre-Req
    • SSH & Eleevate to Sudo su – !!
  • Configure Docker
    • Open Port
    • Create daemon.json file
    • Restart docker
    • Curl to test Docker
  • Update the Prometheus YAML File
  • Update the Docker-Compose YAML File
    • docker-compose.yml
    • Apply changes & rebuild
    • Ensure stuff is runnin’!
    • Open port 9090
  • Install the Docker & Monitoring DB
    • Create Grafana Data Source
    • Add Docker Dashboard
    • Add email notification
    • Alert for CPU Usage

Pre-Req:

SSH & Elevate to Sudo su – !!:

Configure Docker:

Open Port (for FW in Docker reporting under Prometheus):

Create daemon.json file:

Restart Docker:

Curl to test Docker:

Update the Prometheus YAML File:

  • Add gateway & Grafana to have visualization/reporting for Docker metrics

Update the Docker-Compose YAML File:

docker-compose.yml:

Apply changes & rebuild (docker-compose up -d):

Ensure stuff is runnin (docker ps) & Open port 9090:

Install the Docker & Monitoring DB:

Create Grafana Data Source:

Add Docker Dashboard:

Add email notification:

Alert for CPU Usage:

Release the Helm Kraken!

by EarpMoonWater, posted in Helm, kubernetes

Goal:

Humans aren’t constant, but Helm versions are! So this is an efficient way to release & clarify your versions of charts in Helm. Then for gigs we will rollback to the original state, cuz – why not?

Lessons Learned:

  • Update index & version #
    • Update values.yaml
    • Update chart.yaml
  • Initialize
    • Helm install
  • Release the chart & confirm version #
    • Check the node port & see it launched!
  • Update index data & version #
    • Update the files again
  • Rollback it on back now! – – – to Previous Version #:

Update index & version #:

  • Updated index & type of service as well as nodeport #

Update values.yaml:

Update Chart.yaml:

  • Update version #

Initialize & Patch Helm:

Helm install:

Release the chart & confirm version #:

Check the node port & see it launched!

Update Index Data & Version #:

Update the files again:

Helm ls –short & upgrade the release

  • Just go to the values & Chart yaml files – – just update something!

Rollback it on back now! – – – to Previous Version #:

Advance your Helm Charts!

by EarpMoonWater, posted in Helm, kubernetes

Goal:

Hmmm I wish there was a way to validate the resources deployed in Kubernetes.. wait, I just had an epiphany, or was it a download from the universe? Either way, Helm can help w/creating a special hook deploy & operate.

Lessons Learned:

  • Create Manifest for test the Helm Charts Location
  • Validate, Release, & Test the App

Create Manifest for test the Helm Charts Location:

Create directory along w/new manifest:

Validate, Release, & Test the App:

Cd into top directory & run Helm install & Kubectl:

Lemme teach you to – – … Install Helm

by EarpMoonWater, posted in Helm, kubernetes

Goal:

Everyone likes bread-n-butter, unless you physically cant cuz of some gluten thing or cuz your lactose intolerant.. BUT IF YOUR NOT, check this basic bread-n-butter stuff out homie..

First your gonna install Helm, k? Next configure the repository yah? Following that well release the chart to see what were rollin with, mmkay? Lastly we’ll clean up our messy cluster w/, you guessed it – HELMMMMMMMMMMMMM.

Lessons Learned:

  • Install & Configure Helm
  • Create a Helm Release
  • Verify the Release & Clean

Install & Configure Helm:

Create a Helm Release:

Verify the Release & Clean:

Get-Er-Dun; Helm Charts Edition

by EarpMoonWater, posted in Helm, kubernetes

Goal:

Quick our homework is due in a half hour…lets copy (leverage…refer..) your buddies! But how can we do it the quickest way possible!? Helm charts you say? What are these… Helm Charts you speak of?

So your telling me I can modify a chart to access my application on a node port in the cluster & make changes? Well lets get-r-dun!

Lessons Learned:

  • Create a release of a Helm chart from the directory
  • Double-check the node port our homework isn’t the same on the node port cluster

Create a release of a Helm chart from the directory:

Double-check the node port our homework isnt the same on the node port cluster: