gmaliar

# cache-job.yml
apiVersion: batch/v1
kind: Job
metadata:
  name: "{{ .Chart.Name }}-cache-v{{ .Values.release.version }}"
  annotations:
    "helm.sh/hook": post-upgrade
spec:
  template:
    metadata:

gmaliar

#!/bin/sh

STAGE=production
VERSION=$(git rev-parse --short=6 HEAD)
TAG=tailor-web:v${VERSION}

# Build Docker Image
docker build -t $TAG -f Dockerfile

# Push Docker Image to ECR  

gmaliar

# persistent-asg.tf
resource "aws_autoscaling_group" "nodes-production-persistent-us-east-1a-tailor-brands-k8s-com" {
  name                 = "nodes.production.persistent.us-east-1a.tailor-brands-k8s.com"
  launch_configuration = "${aws_launch_configuration.nodes-production-tailor-brands-k8s-com.id}"
  max_size             = 1
  min_size             = 1
  vpc_zone_identifier  = ["${aws_subnet.us-east-1a-production-tailor-brands-k8s-com.id}"]
tag = {
    key                 = "KubernetesCluster"
    value               = "production.tailor-brands-k8s.com"

gmaliar

#!/bin/sh

INSTANCE_A=$(aws autoscaling describe-auto-scaling-instances | jq '.AutoScalingInstances[] | select(.AutoScalingGroupName == "nodes.production.persistent.us-east-1a.tailor-brands-k8s.com") | .InstanceId')
INSTANCE_B=$(aws autoscaling describe-auto-scaling-instances | jq '.AutoScalingInstances[] | select(.AutoScalingGroupName == "nodes.production.persistent.us-east-1b.tailor-brands-k8s.com") | .InstanceId')
INSTANCE_C=$(aws autoscaling describe-auto-scaling-instances | jq '.AutoScalingInstances[] | select(.AutoScalingGroupName == "nodes.production.persistent.us-east-1c.tailor-brands-k8s.com") | .InstanceId')

NODES=$(aws ec2 describe-instances --filters Name=instance-id,Values=$INSTANCE_A,$INSTANCE_B,$INSTANCE_C | jq --raw-output '.Reservations[].Instances[].NetworkInterfaces[].PrivateDnsName')

kubectl label nodes $NODES persistentNode=true

gmaliar

# cluster-autoscaler-deployment.yml
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: cluster-autoscaler
  namespace: kube-system
  labels:
    app: cluster-autoscaler
spec:
  replicas: 1

gmaliar

# hpa.yml
apiVersion: autoscaling/v1
kind: HorizontalPodAutoscaler
metadata:
  name: ingress-nginx-hpa
spec:
  scaleTargetRef:
    apiVersion: apps/v1beta1
    kind: Deployment
    name: ingress-nginx

gmaliar

# logdna-ds.yml
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
  name: logdna-agent
spec:
  template:
    metadata:
      labels:
        app: logdna-agent

gmaliar

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

gmaliar

brew install vault consul kubectl kubernetes-helm
brew cask install virtualbox
brew cask install minikube

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minikube --vm-driver=virualbox start
kubectl config use-context gce
helm init