Installing Odoo 13.0
Install Odoo
$ export LC_ALL=C
$ sudo apt-get update -y
$ sudo apt-get upgrade -y
$ sudo apt install postgresql -y
$ wget -O - https://nightly.odoo.com/odoo.key | apt-key add -
$ echo "deb http://nightly.odoo.com/13.0/nightly/deb/ ./" >> /etc/apt/sources.list.d/odoo.list
$ apt-get update && apt-get install odoo -y
$ apt-get upgrade -y
Install wkhtmltopdf
$ wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox_0.12.5-1.bionic_amd64.deb
$ sudo apt install ./wkhtmltox_0.12.5-1.bionic_amd64.deb -y
$ sudo service odoo restart
Install nginx
$ sudo apt-get install nginx -y
$ sudo vim /etc/nginx/conf.d/odoo.conf and replace the following
#odoo server
upstream odoo {
server 127.0.0.1:8069;
}
upstream odoochat {
server 127.0.0.1:8072;
}

http -> https

#server {

listen 80;

server_name odoo.mycompany.com;

rewrite ^(.*) https://$host$1 permanent;

#}
server {

listen 443;

server_name mekdam.humanplus.app;

listen 80 default_server;
server_name 213.219.39.246;
proxy_read_timeout 720s;
proxy_connect_timeout 720s;
proxy_send_timeout 720s;
client_max_body_size 0;

Add Headers for odoo proxy mode

proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Real-IP $remote_addr;

log

access_log /var/log/nginx/odoo.access.log;
error_log /var/log/nginx/odoo.error.log;

Redirect requests to odoo backend server

location / {
proxy_redirect off;
proxy_pass http://odoo;
}
location /longpolling {
proxy_pass http://odoochat;
}

common gzip

gzip_types text/css text/less text/plain text/xml application/xml application/json application/javascript;
gzip on;
}
$ vim /etc/nginx/sites-enabled/default
Comment all lines in this file
$ nginx -t
$ sudo service nginx reload
Shoule show syntax is ok
$ vim /etc/odoo/odoo.conf
Add the following values if the server is 4 CPU and 8 GRam, this configuration will run 48 concurrent users perfectly:
workers = 8
proxy_mode = True
addons_path = /usr/lib/python2.7/dist-packages/odoo/addons,/var/lib/odoo/ihuman/addons,/var/lib/odoo/ihuman/third_party_modules
limit_memory_hard = 1677721600
limit_memory_soft = 629145600
limit_request = 8192
limit_time_cpu = 600
limit_time_real = 1200
max_cron_threads = 1

Add the following values if the server is 2 CPU and 4 GRam, this configuration will run about 20 concurrent users perfectly:
(**Note) This need to be tested
workers = 6
proxy_mode = True
addons_path = /usr/lib/python2.7/dist-packages/odoo/addons,/var/lib/odoo/ihuman/addons,/var/lib/odoo/ihuman/third_party_modules
limit_memory_hard = 1677721600
limit_memory_soft = 629145600
limit_request = 5461
limit_time_cpu = 600
limit_time_real = 1200
max_cron_threads = 1

$ sudo service odoo restart
After restarting nginx and odoo you will find problem in poll, do the following to fix poll issue
$ sudo apt-get install python3-pip -y
You may get error while using pip >> locale.Error: unsupported locale setting use the command export LC_ALL=C to solve it
$ sudo pip3 install gevent
$ sudo pip3 install psycogreen
$ sudo service odoo restart
Certificate with certbot and certification hook
$ sudo apt-get update
$ sudo apt-get install software-properties-common -y
$ sudo add-apt-repository universe
$ sudo add-apt-repository ppa:certbot/certbot
sudo apt-add-repository -r ppa:certbot/certbot

$ sudo apt-get update
$ sudo apt-get install certbot python3-certbot-nginx -y
$ sudo certbot --nginx
$ systemctl list-timers
If you want to certify wildcard, all subdomains from your domain
$ apt install certbot
$ certbot certonly --manual --preferred-challenges=dns --email [email protected] --agree-tos -d *.silverwings-tr.com

Auto Backup with rsnapshot
$ sudo apt-get install rsnapshot
$ vim /etc/rsnapshot.conf
Change the lines:
23 snapshot_root /var/lib/odoo/backups/
93 retain daily 3
94 retain weekly 2
95 retain monthly 1
128 lockfile /var/lib/odoo/rsnapshot.pid
239 backup_exec /usr/bin/curl -X POST -F "master_pwd=Mekdam@12345" -F "name=Production" -F "backup_format=zip" -o "/backups/Mekdam_$(date +'%F').zip" "http://localh ost:8069/web/database/backup"
240 backup /backups/ .
241 backup_exec /bin/rm -rf /backups/*
$ mkdir /var/lib/odoo/backups/
$ chown -R odoo: backups/
$ cd
$ mkdir /backups
$ chown -R odoo: /backups
$ vim /etc/systemd/system/[email protected]
[Unit]
Description=rsnapshot (%I) backup

[Service]
Type=oneshot
Nice=19
IOSchedulingClass=idle
ExecStart=/usr/bin/rsnapshot %I
User=odoo
$ vim /etc/systemd/system/rsnapshot-daily.timer
[Unit]
Description=rsnapshot daily backup

[Timer]

01:00 is the clock time when to start it

OnCalendar=01:00
Persistent=true
Unit=[email protected]

[Install]
WantedBy=timers.target
$ vim /etc/systemd/system/rsnapshot-weekly.timer
[Unit]
Description=rsnapshot weekly backup

[Timer]

Run once per week on Saturday at 2:00, after daily runs

OnCalendar=Saturday --* 02:00:00
Persistent=true
Unit=[email protected]

[Install]
WantedBy=timers.target

$ vim /etc/systemd/system/rsnapshot-monthly.timer
[Unit]
Description=rsnapshot monthly backup

[Timer]

Run once per month at 3:00 UTC, after daily and weekly runs

OnCalendar=--1 03:00:00
Persistent=true
Unit=[email protected]

[Install]
WantedBy=timers.target
$ systemctl daemon-reload
$ systemctl enable --now rsnapshot-{daily,weekly,monthly}.timer
$ systemctl status rsnapshot-monthly.timer
$ sudo -Hu odoo rsnapshot daily