Installing SmokePing as a Slave
-----------------------------------------------------
* Prequisites:  Fully functional SmokePing installation to act as the Master
* References:  http://oss.oetiker.ch/smokeping/doc/smokeping_master_slave.en.html

Instructions tested on Ubuntu 8.10 Server ONLY

Run all commands as root ($ sudo -s, then run all commands)

1) SLAVE Setup Instructions

Setup Smokeping

	# apt-get install smokeping

- No configuration files are necessary for slave installations
- Technically, you don't need SpeedyCGI for slave installations, but you'll get everything with the Ubuntu package
- If you want to run SmokePing as a master or stand-alone installation, you will have all the files you need


Create a file containing a password to be used as a shared secret

	#  editor /etc/smokeping/slave_secret

- Enter a strong password on the first line of the new file, then save the file
- Note, /etc/smokeping/slave_secret will contain one word, the password, and nothing else

Set appropriate permissions on this file

	# chmod 600 /etc/smokeping/slave_secret
	# chown smokeping:root /etc/smokeping/slave_secret

Create the cache directory and set appropriate persmissions

	# mkdir /var/smokeping
	# chown smokeping:root /var/smokeping

Modify the init.d Daemon script so /etc/init.d/smokeping start | stop | restart works

	# editor /etc/init.d/smokeping

  Change "MODE=master" to "MODE=slave"
  Change DAEMON_ARGS="" to "DAEMON_ARGS="--master-url=http://<master_IP>/<path to smokeping.cgi>" --cache-dir=/var/smokeping/ --shared-secret=/etc/smokeping/slave-secret"

Restart SmokePing

	# /etc/init.d/smokeping restart

2) MASTER Setup Instructions

Create a file containing the password to be used as a shared secret

	# editor /etc/smokeping/master_secrets

- Enter the hostname (hostname only, not fully qualified domain name) followed by a colon, followed by the password on one line
  The password should match what you created on your slave SmokePing installation in /etc/smokeping/slave_secret
  The hostname is the name of the host running the slave installation of SmokePing
  If you have multiple slaves, put the hostname:password combinations on separate lines
  Example:  myhostname:mypassword

Set appropriate permisssions on this file

	# chmod 640 /etc/smokeping/master_secrets
	# chown www-data:root /etc/smokeping/master_secrets

Modify the SmokePing Slaves configuration file

	# editor /etc/smokeping/config.d/Slaves

- This file should be as follows, but replace 'myhostname' with the hostname of your slave SmokePing installation
  The display_name can be whatever you wish but should be descriptive of where the slave is located
  If you have multiple slaves, put in additional +myhostname, display_name, and color lines
------
 *** Slaves ***
#
## make sure this is not world-readable!
secrets=/etc/smokeping/masters-secrets


+myhostname
display_name=myhostname
color=0000ff
------

Modify the SmokePint Targets configuration file

	# editor /etc/smokeping/config.d/Targets

- Add the following line under the *** Targets *** title, replacing myhostname with the name of your slave Smokeping installation
  If you have multiple slaves, put them all on one line separate by spaces
------
slaves = myhostname
------

Restart SmokePing

	# /etc/init.d/smokeping stop
	# /etc/init.d/smokeping start