get_cassandra.sh

#!/bin/csh

#06/24/2013
#Lampros for WeirdBricks

#check if curl exists
if ( -e `which curl` ) then
  echo "OK: Curl exists"
else
  echo "ERROR:curl doesn't exist"
  echo "Try: pkg_add -r curl"
endif

#get cassandra version from their ftp site
set cassandra_version=`curl ftp://apache.cs.utah.edu/apache.org/cassandra/ | grep 1.2 | awk '{print $9}'`
echo "Cassandra version found on FTP: $cassandra_version"

#set the url based on the version
set cassandra_url=ftp://apache.cs.utah.edu/apache.org/cassandra/$cassandra_version/apache-cassandra-$cassandra_version-bin.tar.gz
echo "OK: Using URL: $cassandra_url"

#get the md5 hash for the file
set cassandra_md5=`curl http://www.apache.org/dist/cassandra/1.2.5/apache-cassandra-1.2.5-bin.tar.gz.md5 | cat`
echo "OK: MD5 is: $cassandra_md5"

#check if file already exists
if ( -e /tmp/apache-cassandra-$cassandra_version-bin.tar.gz ) then
  echo "OK: File already exists.. checking MD5"
  set md5=`md5 -q /tmp/apache-cassandra-$cassandra_version-bin.tar.gz`
  if ( $cassandra_md5 == $md5 ) then
    echo "OK: MD5 seems correct - skipping redownloading"
  else
    echo "ERROR: Incorrect MD5 - deleting temporary file"
    rm /tmp/apache-cassandra-$cassandra_version-bin.tar.gz
    echo "Attempting to download: $cassandra_url"
    cd /tmp;curl -O $cassandra_url
  endif
else
  echo "File not found - Attempting to download: $cassandra_url"
  cd /tmp;curl -O $cassandra_url
endif

#check if /opt directory exists
if ( -d /opt ) then
  echo "OK: /opt directory exists"
else
  echo "ERROR:/opt directory doesn't exist - creating"
  mkdir /opt
endif

#untar the file
printf "\n"
echo "Untarring in /opt/apache-cassandra-$cassandra_version dir"
tar -xzf apache-cassandra-$cassandra_version-bin.tar.gz -C /opt
echo "Untarring complete"

#check if the remaining cassandra directory exists - create them if they don't
set dir_var= (/opt/cassandra/data /opt/cassandra/commitlog /opt/cassandra/saved_caches /var/log/cassandra)
foreach x ($dir_var)
  if ( -d $x ) then
    echo "OK: $x directory exists"
  else
    echo "ERROR:$x directory doesn't exist - creating"
    mkdir -p $x
  endif
end


#edit cassandra.yaml config file
echo "Editing config file: /opt/apache-cassandra-$cassandra_version/conf/cassandra.yaml"
cd /opt/apache-cassandra-$cassandra_version/conf/
awk '{ gsub("/var/lib/","/opt/" ) ; print }' cassandra.yaml > cassandra2.yaml
mv cassandra.yaml cassandra.yaml.original
echo "Backing up cassandra.yaml to cassandra.yaml.original"
mv cassandra2.yaml cassandra.yaml
echo "Editing config file complete"

#check for openjdk7 and paths
if ( `pkg_info | grep openjdk-7 | wc -l` == 0 ) then
  echo "ERROR: OpenJDK 7 package not found! Installing.."
  pkg_add -r openjdk7
  echo "Setting Paths.."
  setenv JAVA_HOME /usr/local/openjdk7
  if ( `grep openjdk7 ~/.cshrc | wc -l ==0` ) then
    echo "ERROR: OpenJDK 7 permanent path is not set .. setting up"
    echo 'setenv JAVA_HOME /usr/local/openjdk7' >> ~/.cshrc
  else
    echo "OK: OpenJDK 7 permanent path is already set"
  endif
else
  echo "OK: OpenJDK 7 package found"
endif


#things to do:
#1.add check for OpenJDK7 --DONE
#2.mkdir /var/log/cassandra/ --DONE
#3.edit /opt/apache-cassandra-1.2.4/conf/log4j-server.properties --not needed
#4.set path temporarily --DONE
#5.set path permanently --DONE
#6.put boot script in github
#7.download boot script automatically
#8.add script in cron on reboot
#9.backup original cassandra.yaml --done
#10.set cassandra paths
#11.look into replacing curl with fetch
#12.profit