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running tests

setup

PROJECT_ID=mokeefe 
ISTIO_VERSION=1.2.0
ZONE=us-east1-b
MACHINE_TYPE=n1-standard-8

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General

u = undo

ctrl-g = show file info

/ = search, then "n" to iterate through search results

Cursor movement:

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helm template ./istio-1.1.7/install/kubernetes/helm/istio --name istio --namespace istio-system \
   --set mixer.telemetry.enabled=false \
   --set mixer.policy.enabled=false \
   --set prometheus.enabled=true \
   --set kiali.enabled=true --set kiali.createDemoSecret=true \
   --set "kiali.dashboard.jaegerURL=http://jaeger-query:16686" \
   --set "kiali.dashboard.grafanaURL=http://grafana:3000" \
   --set grafana.enabled=true \
   --set sidecarInjectorWebhook.enabled=true  > istio.yaml
   

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Notes - Horizontal Pod Autoscaler

Ways to scale a k8s application:

https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/ https://cloud.google.com/kubernetes-engine/docs/how-to/scaling-apps

1. [manual] increase # of pod replicas in a Deployment
2. [auto] with an HPA resource

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Notes - modifying ports for Istio ILB

Setup

1. create GKE cluster / connect to it

2. download istio 1.1.7 release

3. Install Istio with ILB gateway, kiali enabled

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apiVersion: networking.istio.io/v1alpha3
kind: ServiceEntry
metadata:
  name: redis-ext
spec:
   hosts:
   - instance1.default.svc.cluster.local #instance1 is the name of the VM
   ports:
   - number: 80
     name: http

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Attempt to reproduce Istio add-on problems

12 Feb 2019

source- gist

TLDR

• ⚠️ HPA - I also encountered "unknown" HPA status in my EU cluster with the add-on (unlike in a manual installation), unclear why.
• Egress - observed behavior with the add-on matches a manual Istio installation

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apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: sleep-deployment
  labels:
    app: sleep
spec:
  replicas: 1
  selector:
    matchLabels:

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/*
PROBLEM

Given a list of words, we may encode it by writing a reference string S and a list of indexes A.

For example, if the list of words is ["time", "me", "bell"], we can write it as S = "time#bell#" and indexes = [0, 2, 5].

Then for each index, we will recover the word by reading from the reference string from that index until we reach a "#" character.

What is the length of the shortest reference string S possible that encodes the given words?

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package main

import (
	"encoding/json"
	"fmt"
	"io"
	"log"
	"net/http"
	"time"
)