Added tut12

Author: chewett

README.md

@@ -14,15 +14,17 @@ Later we will get onto more complicated topics such as reaching a consensus of w
 
 Questions comments and suggestions can be raised the specific blog post or by using issues here.
 
-## Tutorial 11 - Automatic Slave Reconnection
+## Tutorial 12 - Automatic Start with rc.local
 
-This tutorial focuses on changing the slave so that it will automatically reconnect to the master if the connection is lost.
+This tutorial focuses on modifying our script to automatically start using rc.local.
+ Some changes will be needed to ensure it works after being run from any location.
 
-With this addition the slave will automatically reconnect to the master no matter how many times it has been restarted. This moves the cluster one step forward towards a system which will automatically repair if there is an issue.
+The next tutorial will focus on abstracting the slave code to be more extensible.
 
-The next tutorial will focus on looking at how we can make the cluster code run on boot using rc.local.
-
-The full details for [Tutorial 11 - Automatic Slave Reconnection is available on my blog](https://chewett.co.uk/blog/1964/raspberry-pi-cluster-node-11-automatic-slave-reconnection/)
+The full details for
+[Tutorial 12 - Automatic Start with rc.local is available on my blog](
+https://chewett.co.uk/blog/2002/raspberry-pi-cluster-node-12-automatic-start-with-rc-local/
+)
 
 ## Requirements
 

RpiCluster/MainLogger.py

@@ -1,5 +1,5 @@
+import os
 import logging
-import time
 
 # First lets set up the formatting of the logger
 logFormatter = logging.Formatter("%(asctime)s [%(threadName)-12.12s] [%(levelname)-5.5s]  %(message)s")
@@ -17,6 +17,6 @@
 
 def add_file_logger(filename):
     # Create a handler to store the logs to a file
-    fileHandler = logging.FileHandler(filename)
+    fileHandler = logging.FileHandler(os.path.abspath(os.path.join(os.path.dirname(os.path.realpath(__file__)), "..", filename)))
     fileHandler.setFormatter(logFormatter)
     logger.addHandler(fileHandler)

basic_master.py

@@ -1,12 +1,13 @@
 #!/usr/bin/env python2.7
 
+import os
 import socket
 import ConfigParser
 from RpiCluster.MainLogger import add_file_logger, logger
 from RpiCluster.RpiClusterClient import RpiClusterClient
 
 config = ConfigParser.ConfigParser()
-config.read('rpicluster.cfg')
+config.read(os.path.join(os.path.dirname(os.path.realpath(__file__)), 'rpicluster.cfg'))
 
 socket_port = config.getint("master", "socket_port")
 socket_bind_ip = config.get("master", "socket_bind_ip")
@@ -24,3 +25,6 @@
 
     rpiClient = RpiClusterClient(clientsocket, address)
     rpiClient.start()
+
+
+

basic_slave.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python2.7
 
+import os
 import time
 import random
 import ConfigParser
@@ -11,7 +12,7 @@
 from RpiCluster.RpiClusterExceptions import DisconnectionException
 
 config = ConfigParser.ConfigParser()
-config.read('rpicluster.cfg')
+config.read(os.path.join(os.path.dirname(os.path.realpath(__file__)), 'rpicluster.cfg'))
 
 socket_port = config.getint("slave", "socket_port")
 master_ip = config.get("slave", "master_ip")