Categorygithub.com/ChenYenDu/GoWebDev31_AWS01_hello
package
0.0.0-20210726165104-42ea4af6fad4
Repository: https://github.com/chenyendu/gowebdev.git
Documentation: pkg.go.dev
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# README

Create an instance

  1. Create an AWS Account

    • enter credit card info

  2. Sign into console

  3. Create a new EC2 instance

    • services / EC2
    • launch instance
    • choose your instance
    • add storage / 30GB free
    • add tags / webserver
    • security / ssh / http
    • launch
    • create new key pair / download

Deploy your binay

  • mv [src][dst] / sudo chmod 400 your.pem

  • Build hello world

    • GOOS=linux GOARCH=amd64 go build -o self-define-name

  • Copy your binary into the server

    • scp -i /path/to/[your].pem ./main ec2-user@[public-DNS]:
    • say yes to The authenticity of host ... can't be established.

  • SSH into your server

    • ssh -i /path/to/[your].pen ec2-user@[public-DNS]:

  • Run your code

    • sudo chmod 700 mybinary
    • sudo ./mybinary
    • check it in a browser at [public-ip]

  • Exit

    • ctrl + c
    • exit

Persisting your application

To run application after the terminal session has ended, we must do one of the followings:

Possible options

  1. screen
  2. init.d
  3. upstart
  4. system.d

System.d

  1. create a configuration file
    • cd /etc/systemd/system/
    • sudo nano <filename>.service
[Unit]
Description=GO Server

[Service]
ExecStart=/home/<username>/<exepath>
User=root
Group=root
Restart=always

[Install]
WantedBy=multi-user.target

  1. Add the service to systemd

    • sudo systemctl enable <filename>.sevice

  2. Activate the service

    • sudo systemctl start <filename>.service

  3. Check if systemd started it.

    • sudo systemctl status <filename>

  4. Stop systemd if so desired

    • sudo systemctl stop <filename>

Troubleshooting

A possible issue could be that you're cross-compiling for the wrong architecture: AWS might have assigned you a different machine than the one used in this example. To solve this problem, we will install Go on the AWS machine and then run "go env" to see GOOS & GOARCH for that machine.

  • Download Go
  • unpack go
    • tar -xzf go1.7.4.linux-amd64.tar.gz
  • remove the tar file
    • rm -rf go1.7.4.linuz-amd64.tar.gz
  • make your go workspace
    • mkdir goworkspace
    • cd goworkspace
    • mkdir bin pkg src
    • cd ../
  • add environment variables
    • nano .bashrc 
      export GOROOT=/home/ubuntu/go
export GOPATH=/home/ubuntu/goworkspace
export PATH=$PATH:/home/ubuntu/goworkspace/bin
export PATH=$PATH:/home/ubuntu/go/bin
  • refresh environment variables
    • source ~/.bashrc
  • confirm installation
    • go version
  • get machine GOOS & GOARCH info
    • go env

Troubleshooting

Sometimes students miss setting port openings in security. If you are having issues, check to make sure these settings are correct - and please note, your IP address for SSH will either be 0.0.0.0/0 or something different than mine.