#!/bin/bash

# this script is useful to demo canary deployment when the latest function starts receiving 100% of the traffic

DEMO_RUN_FAST=1
ROOT_DIR=$(dirname $0)/..
. $ROOT_DIR/util.sh

desc "Kubernetes cluster"
run "kubectl get nodes"

desc "Fission installed"
run "kubectl --namespace fission get deployment"

clear

desc "NodeJS environment pods"
run "kubectl --namespace fission-function get pod -l environmentName=nodejs"

# set up functions
fission fn create --name func-v1 --env nodejs --code func-v1.js
desc "Function version 1"
run "fission function get --name func-v1"

fission fn create --name func-v2 --env nodejs --code func-v2.js
desc "Function version 2"
run "fission function get --name func-v2"

desc "Create a route \(HTTP trigger\) the version-1 of the function with weight 100% and version-2 with weight 0%"
run "fission route create --name route-canary --method GET --url /canary --function func-v2 --weight 0 --function func-v1 --weight 100"

desc "Start sending requests to the route"
run_bg "hey -n 100000 -c 1 http://$FISSION_ROUTER/canary"

desc "Create a canary config: with an increment of 10 percent, every 1 minute, rolling back if 10% of requests fail"
run "fission canary-config create --name canary-1 --newfunction func-v2 --oldfunction func-v1 --httptrigger route-canary --increment-step 10 --increment-interval 30s --failure-threshold 10"