meinside/rails-on-raspberrypi: Rails on Raspberry Pi

== Rails on Raspberry Pi

This application is for monitoring Raspberry Pi server's status.

=== 1. Configuration

==== install latest ruby and rails using RVM

$ curl -L https://get.rvm.io | sudo bash -s stable $ rvm install ruby $ ...

==== clone this project and install bundles

$ mkdir ~/rails $ git clone git://github.com/meinside/rails-on-raspberrypi.git ~/rails/rpi $ cd ~/rails/rpi $ bundle install

==== prepare for running

$ cp config/secrets.yml.sample config/secrets.yml $ vi config/secrets.yml $ cp config/database.yml.sample config/database.yml $ vi config/database.yml $ cp config/newrelic.yml.sample config/newrelic.yml $ vi config/newrelic.yml $ RAILS_ENV=production rake db:migrate $ RAILS_ENV=production rake assets:precompile

==== install passenger module

$ gem install passenger

===== A. on Apache2

$ sudo passenger-install-apache2-module

and do as it directs:

====== a. setup apache,

$ sudo vi /etc/apache2/apache2.conf

LoadModule passenger_module /usr/local/rvm/gems/ruby-x.x.x/gems/passenger-y.y.y/buildout/apache2/mod_passenger.so
<IfModule mod_passenger.c>
  PassengerRoot /usr/local/rvm/gems/ruby-x.x.x/gems/passenger-y.y.y
  PassengerDefaultRuby /usr/local/rvm/gems/ruby-x.x.x/wrappers/ruby
  PassengerStartTimeout 300
</IfModule>

====== b. setup site,

$ sudo vi /etc/apache2/sites-available/rpi

# if it will be on the virtual host's root:
<VirtualHost *:80>
  ServerName raspberrypi
  # !!! Be sure to point DocumentRoot to 'public'!
  DocumentRoot /home/user/rails/rpi/public
  <Directory /home/user/rails/rpi/public>
    # This relaxes Apache security settings.
    AllowOverride all
    # MultiViews must be turned off.
    Options -MultiViews
	# Uncomment this if you're on Apache >= 2.4:
	#Require all granted
  </Directory>
</VirtualHost>

# or if it will be on the sub uri:
<VirtualHost *:80>
  # (already-existing virtual host's configuration here)
  # blah blah...
  
  # add following lines here:
  Alias /suburi /home/user/rails/rpi/public
  <Location /suburi>
    PassengerBaseURI /suburi
    PassengerAppRoot /home/user/rails/rpi
  </Location>
  <Directory /home/user/rails/rpi/public>
    Allow from all
    Options -MultiViews
  </Directory>

</VirtualHost>

====== c. and enable it

$ sudo a2ensite rpi $ sudo service apache2 reload

===== B. on Nginx

$ sudo passenger-install-nginx-module

====== a. configure Nginx,

referenced: https://github.com/hulihanapplications/nginx-init-debian

$ sudo vi /etc/init/nginx.conf

description "Nginx HTTP Server"

start on filesystem stop on runlevel [!2345]

respawn exec /opt/nginx/sbin/nginx -g "daemon off;"

$ sudo vi /etc/init.d/nginx

#! /bin/bash

BEGIN INIT INFO

Provides: nginx

Required-Start: $remote_fs $syslog

Required-Stop: $remote_fs $syslog

Default-Start: 2 3 4 5

Default-Stop: 0 1 6

Short-Description: nginx init.d bash script for debian/ubuntu

Description: nginx init.d bash script for debian/ubuntu

END INIT INFO

#------------------------------------------------------------------------------

nginx - This is a bash script for starting/stopping/restarting nginx on

debian-based distributions such as Ubuntu, Mint, Mepis, etc.

description: Nginx is an HTTP(S) server, HTTP(S) reverse

proxy and IMAP/POP3 proxy server. This

script will manage the initiation of the

server and it's process state.

processname: nginx

Provides: nginx

#------------------------------------------------------------------------------

Author

#------------------------------------------------------------------------------

Copyright (c) 2012 Dave Hulihan, www.hulihanapplications.com

* Fork this at

* Based on Jason Giedymin's nginx-init-ubuntu: http://code.google.com/p/nginx-init-ubuntu/

#------------------------------------------------------------------------------

MIT X11 License

#------------------------------------------------------------------------------

Permission is hereby granted, free of charge, to any person obtaining

a copy of this software and associated documentation files (the

"Software"), to deal in the Software without restriction, including

without limitation the rights to use, copy, modify, merge, publish,

distribute, sublicense, and/or sell copies of the Software, and to

permit persons to whom the Software is furnished to do so, subject to

the following conditions:

The above copyright notice and this permission notice shall be

included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE

LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

#------------------------------------------------------------------------------

Functions

#------------------------------------------------------------------------------ . /lib/lsb/init-functions

#------------------------------------------------------------------------------

Consts

#------------------------------------------------------------------------------

Change these to match your nginx configuration

DAEMON=/opt/nginx/sbin/nginx NGINX_CONF_FILE="/opt/nginx/conf/nginx.conf" PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin PS="nginx" # process name PIDNAME="nginx" # lets you do $PS-slave DESCRIPTION="Nginx Server..." # PIDFILE=$PIDNAME.pid # pid file PIDSPATH=/var/run # RUNAS=root # user to run as SCRIPT_OK=0 # ala error codes SCRIPT_ERROR=1 # ala error codes TRUE=1 # boolean FALSE=0 # boolean

#------------------------------------------------------------------------------

Simple Tests

#------------------------------------------------------------------------------

#test if nginx is a file and executable test -x $DAEMON || exit 0

Include nginx defaults if available

if [ -f /etc/default/nginx ] ; then . /etc/default/nginx fi

#set exit condition #set -e

#------------------------------------------------------------------------------

Functions

#------------------------------------------------------------------------------

setFilePerms(){
```
      if [ -f $PIDSPATH/$PIDFILE ]; then
              chmod 400 $PIDSPATH/$PIDFILE
      fi
```
}

configtest() { $DAEMON -t -c $NGINX_CONF_FILE }

getPSCount() { return pgrep -f $PS | wc -l }

isRunning() { if [ $1 ]; then pidof_daemon $1 PID=$?
```
              if [ $PID -gt 0 ]; then
                      return 1
              else
                      return 0
              fi
      else
              pidof_daemon
              PID=$?

              if [ $PID -gt 0 ]; then
                      return 1
              else
                      return 0
              fi
      fi
```
}

#courtesy of php-fpm wait_for_pid () { try=0
```
      while test $try -lt 35 ; do

              case "$1" in
                      'created')
                      if [ -f "$2" ] ; then
                              try=''
                              break
                      fi
                      ;;

                      'removed')
                      if [ ! -f "$2" ] ; then
                              try=''
                              break
                      fi
                      ;;
              esac

              #echo -n .
              try=`expr $try + 1`
              sleep 1
      done
```
}

status(){ isRunning isAlive=$?
```
  if [ "${isAlive}" -eq $TRUE ]; then
              echo "$PIDNAME found running with processes:  `pidof $PS`"
      else
              echo "$PIDNAME is NOT running."
      fi
```
}

removePIDFile(){ if [ $1 ]; then if [ -f $1 ]; then rm -f $1 fi else #Do default removal if [ -f $PIDSPATH/$PIDFILE ]; then rm -f $PIDSPATH/$PIDFILE fi fi }

start() { log_daemon_msg "Starting $DESCRIPTION"
```
  #isRunning
  #isAlive=$?

  #if [ "${isAlive}" -eq $TRUE ]; then
  #        log_end_msg $SCRIPT_ERROR
  #else
  #        #start-stop-daemon --start --quiet --chuid $RUNAS --make-pidfile --pidfile $PIDSPATH/$PIDFILE --exec $DAEMON -- -c $NGINX_CONF_FILE
  #		start-stop-daemon --start --quiet --chuid $RUNAS --name $PS --exec $DAEMON -- -c $NGINX_CONF_FILE                
  #        setFilePerms
  #        log_end_msg $SCRIPT_OK
  #fi

  start-stop-daemon --start --quiet --chuid $RUNAS --exec $DAEMON -- -c $NGINX_CONF_FILE
  log_end_msg $SCRIPT_OK    
  return 0
```
}

stop() { log_daemon_msg "Stopping $DESCRIPTION"
```
  #log_daemon_msg "Checking if $PS is running..." 
  #isRunning
  #isAlive=$?

  #if [ "${isAlive}" -eq $TRUE ]; then
  # 	log_end_msg $SCRIPT_OK
  # else
  #    log_end_msg $SCRIPT_ERROR
  #    log_daemon_msg "Cannot tell if $PS is running. Trying to stop anyway..."
  # fi

  log_end_msg $SCRIPT_OK
  start-stop-daemon --stop --quiet --exec $DAEMON          
  return 0
```
}

reload() { configtest || return $?
```
  log_daemon_msg "Reloading (via HUP) $DESCRIPTION"

      isRunning
      if [ $? -eq $TRUE ]; then
  	`killall -HUP $PS` #to be safe

              log_end_msg $SCRIPT_OK
      else
              log_end_msg $SCRIPT_ERROR
      fi
```
}

quietupgrade() { log_daemon_msg "Peforming Quiet Upgrade $DESCRIPTION"
```
      isRunning
      isAlive=$?
      if [ "${isAlive}" -eq $TRUE ]; then
  	kill -USR2 `cat $PIDSPATH/$PIDFILE`
  	kill -WINCH `cat $PIDSPATH/$PIDFILE.oldbin`

  	isRunning
  	isAlive=$?
  	if [ "${isAlive}" -eq $TRUE ]; then
  		kill -QUIT `cat $PIDSPATH/$PIDFILE.oldbin`
  		wait_for_pid 'removed' $PIDSPATH/$PIDFILE.oldbin
                      removePIDFile $PIDSPATH/$PIDFILE.oldbin

  		log_end_msg $SCRIPT_OK
  	else
  		log_end_msg $SCRIPT_ERROR

  		log_daemon_msg "ERROR! Reverting back to original $DESCRIPTION"

  		kill -HUP `cat $PIDSPATH/$PIDFILE`
  		kill -TERM `cat $PIDSPATH/$PIDFILE.oldbin`
  		kill -QUIT `cat $PIDSPATH/$PIDFILE.oldbin`

  		wait_for_pid 'removed' $PIDSPATH/$PIDFILE.oldbin
                      removePIDFile $PIDSPATH/$PIDFILE.oldbin

  		log_end_msg $SCRIPT_ok
  	fi
      else
              log_end_msg $SCRIPT_ERROR
      fi
```
}

terminate() { log_daemon_msg "Force terminating (via KILL) $DESCRIPTION"
```
  PIDS=`pidof $PS` || true

  [ -e $PIDSPATH/$PIDFILE ] && PIDS2=`cat $PIDSPATH/$PIDFILE`

  for i in $PIDS; do
  	if [ "$i" = "$PIDS2" ]; then
          	kill $i
                      wait_for_pid 'removed' $PIDSPATH/$PIDFILE
  		removePIDFile
  	fi
  done

  log_end_msg $SCRIPT_OK
```
}

destroy() { log_daemon_msg "Force terminating and may include self (via KILLALL) $DESCRIPTION" killall $PS -q >> /dev/null 2>&1 log_end_msg $SCRIPT_OK }

pidof_daemon() { PIDS=pidof $PS || true
```
  [ -e $PIDSPATH/$PIDFILE ] && PIDS2=`cat $PIDSPATH/$PIDFILE`

  for i in $PIDS; do
      if [ "$i" = "$PIDS2" ]; then
          return 1
      fi
  done
  return 0
```
}

Handle signals

#trap "echo 'Exiting Prematurely.'; exit 1" SIGTERM

case "$1" in start) start ;; stop) stop ;; restart|force-reload) stop sleep 1 start ;; reload) $1 ;; status) status ;; configtest) $1 ;; quietupgrade) $1 ;; terminate) $1 ;; destroy) $1 ;; *) FULLPATH=/etc/init.d/$PS echo "Usage: $FULLPATH {start|stop|restart|force-reload|status|configtest|quietupgrade|terminate|destroy}" echo " The 'destroy' command should only be used as a last resort." exit 1 ;; esac

exit 0

$ sudo chmod +x /etc/init.d/nginx

$ sudo /usr/sbin/update-rc.d -f nginx defaults

====== b. setup site,

$ sudo vi /opt/nginx/conf/nginx.conf

server {
  listen 80;
  server_name raspberrypi;
  root /home/user/rails/rpi/public;
  passenger_enabled on;
}

====== c. start service

$ service nginx start

=== 2. Tips

==== use logrotate.d

$ sudo vi /etc/logrotate.d/nginx

/opt/nginx/logs/*.log {
  compress
  copytruncate
  daily
  delaycompress
  missingok
  rotate 7
  size=5M
}

$ sudo vi /etc/logrotate.d/rpi-log

/home/user/rails/rpi/log/*.log {
  compress
  copytruncate
  daily
  delaycompress
  missingok
  rotate 7
  size=5M
}

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Metadata

BEGIN INIT INFO

Provides: nginx

Required-Start: $remote_fs $syslog

Required-Stop: $remote_fs $syslog

Default-Start: 2 3 4 5

Default-Stop: 0 1 6

Short-Description: nginx init.d bash script for debian/ubuntu

Description: nginx init.d bash script for debian/ubuntu

END INIT INFO

nginx - This is a bash script for starting/stopping/restarting nginx on

debian-based distributions such as Ubuntu, Mint, Mepis, etc.

description: Nginx is an HTTP(S) server, HTTP(S) reverse

proxy and IMAP/POP3 proxy server. This

script will manage the initiation of the

server and it's process state.

processname: nginx

Provides: nginx

Author

Copyright (c) 2012 Dave Hulihan, www.hulihanapplications.com

* Fork this at

* Based on Jason Giedymin's nginx-init-ubuntu: http://code.google.com/p/nginx-init-ubuntu/

MIT X11 License

Permission is hereby granted, free of charge, to any person obtaining

a copy of this software and associated documentation files (the

"Software"), to deal in the Software without restriction, including

without limitation the rights to use, copy, modify, merge, publish,

distribute, sublicense, and/or sell copies of the Software, and to

permit persons to whom the Software is furnished to do so, subject to

the following conditions:

The above copyright notice and this permission notice shall be

included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE

LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Functions

Consts

Change these to match your nginx configuration

Simple Tests

Include nginx defaults if available

Functions

Handle signals

← Metadata

Owner

Metadata

rails-on-raspberrypi
rails-on-raspberrypi copied to clipboard