bgadrian

runtime: go111
service: myservice

env_variables:
  HOST: "0.0.0.0"

instance_class: B1
basic_scaling:
  max_instances: 2
  idle_timeout: 15m

bgadrian

FROM golang:1.11.1 AS builder
WORKDIR /src

#avoid downloading the dependencies on succesive builds
COPY go.mod go.sum ./
RUN go mod download
RUN go mod verify

COPY . .
RUN mkdir -p ./build/

bgadrian

  c := make(chan os.Signal, 1)
	signal.Notify(c, os.Interrupt)

	// Block until we receive our signal.
	<-c
	log.Println("shutting down signal received, waiting ...")
	ctx, cancel := context.WithTimeout(context.Background(), time.Second*15)
	defer cancel()
	srv.Shutdown(ctx)

bgadrian

#if you use gcloud but the app requires 
gcloud auth application-default login

export GOOGLE_APPLICATION_CREDENTIALS="/home/$USER/.config/gcloud/application_default_credentials.json" 

#https://docs.docker.com/machine/drivers/gce/#example
docker-machine create --driver google --google-project YOURPORJECTID --google-machine-type f1-micro VMNAME

bgadrian

#install FlameGraph library
cd /opt/
sudo git clone https://github.com/brendangregg/FlameGraph.git
#make it accesible from any folder
vim ~/.bashrc
##add these lines anywhere and exit vim (if you can)
export FLAMEPATH=/opt/FlameGraph
PATH=$PATH:$FLAMEPATH

bgadrian

type Set struct {
	list map[int]struct{} //empty structs occupy 0 memory
}

func (s *Set) Has(v int) bool {
	_, ok := s.list[v]
	return ok
}

bgadrian

#chrome
cd /tmp
wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
sudo dpkg -i google-chrome-stable_current_amd64.deb
sudo apt-get -f install

#docker
sudo apt-get update
sudo apt-get install -y \
    apt-transport-https \

bgadrian

func TestFibonacci(t *testing.T) {
	f := func(n int) (r int) {
		a, b := 0, 1
		for i := 2; i <= n; i++ {
			b, a = a+b, b
		}
		return b
	}

bgadrian

#/etc/systemd/system/ folder
[Unit]
Description=Start TightVNC server at startup
After=syslog.target network.target

[Service]
Type=forking
User=YOURUSER
PAMName=login
PIDFile=/home/YOURUSER/.vnc/%H:%i.pid

bgadrian

gcloud init
gcloud auth login
gcloud config set project newID
#create the app from the UI or ... gcloud app create --region="us-central"
gcloud app deploy --verbosity="info"