Here I will provide you the details to deploy simple golang web application on Heroku.
I hope reader of this post has already installed Golang package and have basic knowledge about golang and basic skill about git not mandatory.
I am using go1.6 version on Linux-Ubuntu machine for this post.
sujin@sujin:~$ lsb_release -d
Description: Ubuntu 14.04.4 LTS
sujin@sujin:~$ go version
go version go1.6 linux/amd64
Setup Go directory structure and set GOPATH env variable. add GOPATH/bin to PATH env variable.
set working directory in GOPATH
sujin@sujin:~$ echo $GOPATH
/home/sujin/godir/work
install heroku tool belt
Pull the HerokuTest project from git
Now push your application to git heroku master
I hope reader of this post has already installed Golang package and have basic knowledge about golang and basic skill about git not mandatory.
I am using go1.6 version on Linux-Ubuntu machine for this post.
sujin@sujin:~$ lsb_release -d
Description: Ubuntu 14.04.4 LTS
sujin@sujin:~$ go version
go version go1.6 linux/amd64
Setup Go directory structure and set GOPATH env variable. add GOPATH/bin to PATH env variable.
set working directory in GOPATH
sujin@sujin:~$ echo $GOPATH
/home/sujin/godir/work
create a simple web app in golang. For this example i create a folder called HerokuTest, inside a file called HerokuTest.go that contain program below
package main
import (
"fmt"
"net/http"
"os"
)
func homeHandler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "\n\tHello World From Golang on Heroku")
}
func main() {
http.HandleFunc("/", homeHandler)
fmt.Println("Server Listening...")
err := http.ListenAndServe(":"+os.Getenv("PORT"), nil)
if err != nil {
panic("ListenAndServe")
}
}
Compile and test the program locally
sujin@sujin:~/godir/work/src/blog/HerokuTest$ go build
sujin@sujin:~/godir/work/src/blog/HerokuTest$ ls
HerokuTest HerokuTest.go
sujin@sujin:~/godir/work/src/blog/HerokuTest$ PORT=7070 HerokuTest
Server Listening...
Go to the url http://127.0.0.1:7070/ from web browser it will print Hello World From Golang on Heroku in web page.
We should manage dependency package using Godep
install godep
go get github.com/kr/godep
save all golang dependencies
sujin@sujin:~/godir/work/src/blog/HerokuTest$ godep savesujin@sujin:~/godir/work/src/blog/HerokuTest$ ls Godeps HerokuTest HerokuTest.go
We should create Procfile to tell Heroku which command to execute on web
sujin@sujin:~/godir/work/src/blog/HerokuTest$ echo 'web: HerokTest' > Procfile
Now its time to configure git for the project.
git init
git add .
git git commit -m "Heroku Test Project Initial Commit"
git remote add origin https://github.com/sujinsr/HerokuTest.git
git push origin master
install heroku tool belt
sujin@sujin:~/godir/work/src/blog$ heroku login
Enter your Heroku credentials.
Email: sujinsr@gmail.com
Password (typing will be hidden):
Logged in as sujinsr@gmail.com
Pull the HerokuTest project from git
go get github.com/sujinsr/HerokuTest/...
Move to project directory and create heroku instance for your application
sujin@sujin:~/godir/work/src/github.com/sujinsr/HerokuTest$ heroku create heroku-test-app-blog -b https://github.com/kr/heroku-buildpack-go.git
Creating heroku-test-app-blog... done, stack is cedar-14
Setting buildpack to https://github.com/kr/heroku-buildpack-go.git... done
https://heroku-test-app-blog.herokuapp.com/ | https://git.heroku.com/heroku-test-app-blog.git
Now push your application to git heroku master
sujin@sujin:~/godir/work/src/github.com/sujinsr/HerokuTest$ git push heroku master
Counting objects: 14, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (12/12), done.
Writing objects: 100% (14/14), 1.48 KiB | 0 bytes/s, done.
Total 14 (delta 2), reused 0 (delta 0)
remote: Compressing source files... done.
remote: Building source:
remote:
remote: -----> Fetching set buildpack https://github.com/kr/heroku-buildpack-go.git... done
remote: -----> Go app detected
remote: -----> Checking Godeps/Godeps.json file.
remote: -----> Installing go1.6... done
remote: -----> Running: godep go install -tags heroku ./...
remote:
remote: -----> Discovering process types
remote: Procfile declares types -> web
remote:
remote: -----> Compressing...
remote: Done: 2.2M
remote: -----> Launching...
remote: Released v3
remote: https://heroku-test-app-blog.herokuapp.com/ deployed to Heroku
remote:
remote: Verifying deploy.... done.
To https://git.heroku.com/heroku-test-app-blog.git
* [new branch] master -> master
Check whether application running
sujin@sujin:~/godir/work/src/github.com/sujinsr/HerokuTest$ heroku ps
=== web (Free): HerokuTest (1)
web.1: up 2016/02/28 14:09:45 +0530 (~ 37s ago)
Check the aplication by running heroku open
sujin@sujin:~/godir/work/src/github.com/sujinsr/HerokuTest$ heroku open
Opening heroku-test-app-blog... done
Created new window in existing browser session.
Check the logs
sujin@sujin:~/godir/work/src/github.com/sujinsr/HerokuTest$ heroku logs --tail
2016-02-28T08:38:42.408669+00:00 heroku[api]: Enable Logplex by sujinsr@gmail.com
2016-02-28T08:38:42.408669+00:00 heroku[api]: Release v2 created by sujinsr@gmail.com
2016-02-28T08:39:43.323594+00:00 heroku[api]: Scale to web=1 by sujinsr@gmail.com
2016-02-28T08:39:43.566013+00:00 heroku[slug-compiler]: Slug compilation started
2016-02-28T08:39:43.566018+00:00 heroku[slug-compiler]: Slug compilation finished
2016-02-28T08:39:43.414709+00:00 heroku[api]: Deploy 51ae268 by sujinsr@gmail.com
2016-02-28T08:39:43.414779+00:00 heroku[api]: Release v3 created by sujinsr@gmail.com
2016-02-28T08:39:44.250976+00:00 heroku[web.1]: Starting process with command `HerokuTest`
2016-02-28T08:39:45.250323+00:00 app[web.1]: Server Listening...
2016-02-28T08:39:45.844980+00:00 heroku[web.1]: State changed from starting to up
How to Deploy to a VPS, say, Digitalocean? Thanks.
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