Mitch Connors therealmitchconnors

Learn Kubernetes with Google - Istio

These files will help you follow along with our Learn Kubernetes with Google series (TODO link to YouTube). In them, you take the role of a service operator who's kubernetes application is misbehaving, and we will use Istio to help identify, mitigate, and resolve the misbehavior. Each step corresponds to one five minute episode, and teaches a core concept of Istio.

Step 1

Run the following command before starting the series to install a slightly broken version of our bookinfo service into your kubernetes cluster.

curl https://gist.githubusercontent.com/therealmitchconnors/b88965a820768e76e02b1b8e4546b64c/raw/install.sh | bash

NOTE: for platforms other than GKE, you may need to modify the gatewayClassName parameter to fit your cloud provider of choice.

Istio Performance Analysis

The goal of this experiment is to measure the amount of latency that is added to a simple service by the addition of various Istio Components. To isolate the contribution of each component, many combinations of avialable components were tested and recorded.

Components

Sidecar
Istio Ingress
Load Balancer Ingress

Other Parameters

	---
	# Source: load/templates/server.yaml
	apiVersion: v1
	kind: Namespace
	metadata:
	labels:
	scenario: many-svc
	istio.io/dataplane-mode: none
	name: ns-001
	---

	NAME SERVICE FQDN PORT SUBSET DIRECTION TYPE DESTINATION RULE
	cluster/BlackHoleCluster cluster/BlackHoleCluster - - - STATIC
	cluster/agent cluster/agent - - - STATIC
	cluster/outbound\|7000\|\|argocd-applicationset-controller.akuity.svc.cluster.local argocd-applicationset-controller.akuity.svc.cluster.local 7000 - outbound EDS
	cluster/outbound\|8080\|\|argocd-applicationset-controller.akuity.svc.cluster.local argocd-applicationset-controller.akuity.svc.cluster.local

	---
	# Source: crds/crd-operator.yaml
	# SYNC WITH manifests/charts/base/files
	apiVersion: apiextensions.k8s.io/v1
	kind: CustomResourceDefinition
	metadata:
	name: istiooperators.install.istio.io
	labels:
	release: istio
	spec:

	apiVersion: install.istio.io/v1alpha1
	kind: IstioOperator
	spec:
	components:
	ingressGateways:
	- name: istio-egressgateway
	enabled: true
	k8s:
	hpaSpec:
	maxReplicas: 40

	cat <<EOF \| kubectl apply -n istio-system -f -
	apiVersion: cloud.google.com/v1beta1
	kind: BackendConfig
	metadata:
	name: http-hc-config
	spec:
	healthCheck:
	checkIntervalSec: 2
	timeoutSec: 1
	healthyThreshold: 1

	// Copyright 2020 Istio Authors
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,

	// copyright

	// standard generated code warning

	package features

	const (
	traffic_circuitbreakers_failgracefully = "traffic.circuit-breakers.fail-gracefully"
	observability = "observability"
	usability_introspection_status_distribution_immidatelyfalse = "usability.introspection.status.distribution.immediately-false"

	FROM golang:latest AS getter
	RUN go get -u -v github.com/go-delve/delve/cmd/dlv
	#COPY dlv .

	FROM docker.io/therealmitchconnors/pilot:therealmitchconnors

	EXPOSE 40000
	COPY --from=0 /go/bin/dlv .
	ENTRYPOINT ["./dlv", "--listen=:40000", "--headless=true", "--api-version=2", "exec", "/usr/local/bin/pilot-discovery", "--"]