Deploy Kandan Chat Server in nginx with thin - arrivu/beacon GitHub Wiki

get Kandan code

sysadmin@appserver:~$ cd
clone the repository in sysadmin home directroy
sysadmin@appserver:~$ git clone -b deploy https://github.com/m-narayan/kandan.git
sysadmin@appserver:~$ sudo mkdir -p /var/deploy/kandan/kandan-<datestamp>
sysadmin@appserver:~$ cd kandan
sysadmin@appserver:kandan$ cp -av * /var/deploy/kandan/kandan-<datestamp>
sysadmin@appserver:kandan$ cd /var/deploy/kandan/kandan-<datestamp>

Bundle and kandan dependencies

sysadmin@appserver:/var/deploy/kandan/kandan-<datestamp>$ bundle install --deployment --without=sqlite

Create user and databases for kandan

psql -U postgres
create user kandan password 'kandan';
CREATE DATABASE kandan_production ENCODING 'UTF8' OWNER kandan;
GRANT ALL PRIVILEGES ON DATABASE kandan_production to kandan;
\q

#Database configuration

sysadmin@appserver:/var/deploy/kandan$ vi config/database.yml

Update this section to reflect your Postgres server's location and authentication credentials

Database population

sysadmin@appserver:/var/deploy/kandan$RAILS_ENV=production bundle exec rake db:create 
sysadmin@appserver:/var/deploy/kandan$RAILS_ENV=production bundle exec rake db:migrate 
sysadmin@appserver:/var/deploy/kandan$RAILS_ENV=production bundle exec rake kandan:bootstrap

Assets pre-complie

sysadmin@appserver:/var/deploy/kandan$bundle exec rake assets:precompile

Install Thin server

sysadmin@appserver:$sudo gem install thin
sysadmin@appserver:$thin -v
sysadmin@appserver:$sudo thin install
sysadmin@appserver:$sudo /usr/sbin/update-rc.d -f thin defaults
sysadmin@appserver:$sudo thin config -C /etc/thin/kandan.yml -c /var/deploy/kandan/  --servers 3 -e production
sysadmin@appserver:$ cat /etc/thin/kandan.yml

We have to change the /etc/init.d/thin script to use bundler ,so replace the code with the follwing code.

sysadmin@appserver:$sudo vi vi /etc/init.d/thin

#!/bin/bash
DAEMON=/usr/local/bin/thin
BUNDLE=/usr/local/bin/bundle
CONFIG_PATH=/etc/thin
SCRIPT_NAME=/etc/init.d/thin

# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0

invoke()
{
  CONFIGS=$CONFIG_PATH/*
  [ -e "$CONFIG_PATH/$2.yml" ] && CONFIGS=$CONFIG_PATH/$2.yml
  for conf in $CONFIGS
  do
    echo "[$1] $conf"
    user=`grep "^user: " $conf|sed -e 's/^user: //g'`
    group=`grep "^group: " $conf|sed -e 's/^group: //g'`

    # Switch to the app's directory and set permissions
    cd `grep "^chdir: " $conf|sed -e 's/^chdir: //g'`
    [ -d ./log ] && chown $user:$group ./log
    [ -d ./tmp ] && chown -R $user:$group ./tmp

    # Run with bundler
    if [ -e Gemfile ] && grep thin Gemfile > /dev/null; then
      $BUNDLE exec $DAEMON $1 -d --config=$conf
    # Run with system Thin
    else
      $DAEMON $1 -d --config=$conf
    fi
  done
}
case "$1" in
  start)
  invoke start $2
  ;;
  stop)
  invoke stop $2
     ;;
  restart)
  invoke restart $2
  ;;
  *)
  echo "Usage: $SCRIPT_NAME {start|stop|restart} [config_name]" >&2
  exit 3
  ;;
esac

Create current symlink for kandan

sysadmin@appserver:/var/kandan$ ln -s /var/deploy/kandan/kandan-<datestamp> /var/deploy/kandan/current

configure nginx and thin for kandan

sysadmin@appserver:/var/kandan$ cd /opt/nginx/sites-available
sysadmin@appserver:/opt/nginx/sites-available$ sudo vi kandan

add the following line to the file to redirect plain http request url to secure https url

upstream chat.arrivuapps{
  server 127.0.0.1:3000;
  server 127.0.0.1:3001;
  server 127.0.0.1:3002;
}
server {
  listen   80;
  server_name chat.arrivuapps.com;

            access_log /var/log/nginx/kandan.access.log;
            error_log  /var/log/nginx/kandan.error.log;
            root /var/deploy/kandan/current/public;


  location / {
    proxy_set_header  X-Real-IP  $remote_addr;
    proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header  Host $http_host;
    proxy_redirect  off;
    try_files /system/maintenance.html $uri $uri/index.html $uri.html @ruby;
  }

  location @ruby {
    proxy_pass http://chat.arrivuapps;
  }
}

Enable the Kandan site in Nginx

sysadmin@appserver:/opt/nginx$ sudo ln -s /opt/nginx/sites-available/kandan /opt/nginx/sites-enables/kandan

reload the nginx server configuration

sysadmin@appserver:/opt/nginx$ sudo service nginx reload
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