Unfortunately I've not been able to deploy a basic Golang WebApp on production server. After going through many documentation and tutorials I understood that I need to run Golang WebApp as a Daemon.
First things first: the production server is a single IP running Ubuntu 16.04 with Apache based multiple VirtualHosts /etc/apache2/sites-enabled/
.
Golang environment vars
# set golang environment vars
export GOROOT=/usr/local/go
# set multiple gopaths seperated by ":"
export GOPATH=/var/www/go_projects/gotest.domain2.com
export PATH=$GOPATH/bin:$GOROOT/bin:$PATH
# set PATH so it includes user's private bin directories
PATH="$HOME/bin:$HOME/.local/bin:$PATH"
Systemd Daemon file
[Unit]
Description=GoTest Webserver
[Service]
Type=simple
WorkingDirectory=/var/www/go_projects/gotest.domain2.com
ExecStart=/var/www/go_projects/gotest.domain2.com/main #binary file
[Install]
WantedBy=multi-user.target
VirtualHost Conf
<VirtualHost *:80>
ServerName gotest.domain.com
DocumentRoot /var/www/go_projects/gotest.domain2.com
<Directory /var/www/go_projects/gotest.domain2.com>
Options Indexes FollowSymLinks MultiViews
AllowOverride All
Order allow,deny
allow from all
</Directory>
Go file
package main
import (
"fmt"
"log"
"net/http"
)
func handler(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "Hello World %s!", r.URL.Path[1:])
}
func main() {
http.HandleFunc("/", handler)
log.Fatal(http.ListenAndServe(":8080", nil))
}
The program on http://gotest.domain2.com unfortunately is not executed. It rather lists the content of DocumentRoot
Manual run returns
admin@xyz:/var/www/go_projects/gotest.domain2.com$ ./main
2018/02/18 15:52:58 listen tcp :8080: bind: address already in use
What am I missing or is my deployment approach principally wrong? Cheers!
EDIT: As suggested from Michael Ernst, I tried altering the port/proxy settings and here is the result:
http://gotest.domain2.com leads to 503 Service Unavailable
Following is the outcome of sudo netstat -talpen
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State User Inode PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 0 16367 1250/sshd
tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 0 473536 26340/master
tcp 0 0 0.0.0.0:143 0.0.0.0:* LISTEN 0 16604 1417/dovecot
tcp 0 0 0.0.0.0:2000 0.0.0.0:* LISTEN 5001 17289 1652/asterisk
tcp 0 xx.xx.xx.xx:22 xx.xx.xx.xx:6126 ESTABLISHED 0 615988 13025/sshd: admin [
tcp6 0 0 :::22 :::* LISTEN 0 16369 1250/sshd
tcp6 0 0 :::25 :::* LISTEN 0 473537 26340/master
tcp6 0 0 :::3306 :::* LISTEN 111 17564 1391/mysqld
tcp6 0 0 :::143 :::* LISTEN 0 16605 1417/dovecot
tcp6 0 0 :::80 :::* LISTEN 0 612412 12554/apache2
tcp6 0 0 xx.xx.xx.xx:80 xx.xx.xx.xx:6128 FIN_WAIT2 0 0 -
tcp6 0 0 xx.xx.xx.xx:80 xx.xx.xx.xx:6129 ESTABLISHED 33 615029 12561/apache2
Any idea where the problem lies?