# See https://help.papertrailapp.com/kb/hosting-services/aws-elastic-beanstalk/
#
# Usage:
# - in "sources", replace <VERSION> with the version tag of remote_syslog2 to use (from https://github.com/papertrail/remote_syslog2/releases). For example, replace "<VERSION>" with "v0.18"
# - in "files", replace <YOUR-TRACKED-FILES> with the files you want to monitor for new log lines. Example:  - /var/log/httpd/access_log
# - in "files", replace <YOUR-LOG-DESTINATION> and <YOUR-PORT-NUMBER> with the values shown under log destinations: https://papertrailapp.com/account/destinations
# - the script will set "hostname" automatically. This does not need to be changed.
# Example log_files.yml: https://github.com/papertrail/remote_syslog2/blob/master/examples/log_files.yml.example

sources:
  /home/ec2-user: https://github.com/papertrail/remote_syslog2/releases/download/<VERSION>/remote_syslog_linux_amd64.tar.gz

files:
  "/etc/log_files.yml":
    mode: "00644"
    owner: root
    group: root
    encoding: plain
    content: |
      files:
        - <YOUR-TRACKED-FILES>
      hostname: ##DO_NOT_MODIFY-SETUP_WILL_REPLACE_THIS##
      destination:
        host: <YOUR-LOG-DESTINATION>
        port: <YOUR-PORT-NUMBER>
        protocol: tls
        
  "/tmp/set-logger-hostname.sh":
    mode: "00555"
    owner: root
    group: root
    encoding: plain
    content: |
      #!/bin/bash
      logger_config="/etc/log_files.yml"
      appname=`{ "Ref" : "AWSEBEnvironmentName" }`
      IMDS_TOKEN=`curl -s -X PUT -H "X-aws-ec2-metadata-token-ttl-seconds: 21600" http://169.254.169.254/latest/api/token`
      instid=`curl -s -H "X-aws-ec2-metadata-token: $IMDS_TOKEN" http://169.254.169.254/latest/meta-data/instance-id`
      myhostname=${appname}_${instid}
  
      if [ -f $logger_config ]; then
        # Sub the hostname
        sed "s/hostname:.*/hostname: $myhostname/" -i $logger_config       
      fi
 
  "/etc/init.d/remote_syslog":
    mode: "00555"
    owner: root
    group: root
    encoding: plain
    content: |
      #!/bin/bash
      #
      # remote_syslog This shell script takes care of starting and stopping
      #               remote_syslog daemon
      #
      # chkconfig: - 58 74
      # description: papertrail/remote_syslog \
      #              https://github.com/papertrail/remote_syslog2/blob/master/examples/remote_syslog.init.d
 
      ### BEGIN INIT INFO
      # Provides: remote_syslog
      # Required-Start: $network $local_fs $remote_fs
      # Required-Stop: $network $local_fs $remote_fs
      # Should-Start: $syslog $named ntpdate
      # Should-Stop: $syslog $named
      # Short-Description: start and stop remote_errolog
      # Description: papertrail/remote_syslog2
      #              https://github.com/papertrail/remote_syslog2/blob/master/examples/remote_syslog.init.d
      ### END INIT INFO
 
      # Source function library.
      . /etc/init.d/functions
 
      # Source networking configuration.
      . /etc/sysconfig/network
       
      prog="/usr/local/bin/remote_syslog"   
      config="/etc/log_files.yml"
      pid_dir="/var/run"
 
      EXTRAOPTIONS="--poll=true"
 
      pid_file="$pid_dir/remote_syslog.pid"
 
      PATH=/sbin:/bin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
 
      RETVAL=0
 
      is_running(){
          # Do we have PID-file?
          if [ -f "$pid_file" ]; then
              # Check if proc is running
              pid=`cat "$pid_file" 2> /dev/null`
              if [[ $pid != "" ]]; then
                  exepath=`readlink /proc/"$pid"/exe 2> /dev/null`
                  exe=`basename "$exepath"`
                  if [[ $exe == "remote_syslog" ]]; then
                      # Process is running
                      return 0
                  fi
              fi
          fi
          return 1
      }
 
      start(){
          echo -n $"Starting $prog: "
          unset HOME MAIL USER USERNAME
          $prog -c $config --pid-file=$pid_file $EXTRAOPTIONS
          RETVAL=$?
          echo
          return $RETVAL
      }
 
      stop(){
          echo -n $"Stopping $prog: "
          if (is_running); then
            kill `cat $pid_file`
            RETVAL=$?
            echo
            return $RETVAL
          else
            echo "$pid_file not found"
          fi
      }
 
      status(){
          echo -n $"Checking for $pid_file: "
 
          if (is_running); then
            echo "found"
          else
            echo "not found"
          fi
      }
 
      reload(){
          restart
      }
 
      restart(){
          stop
          start
      }
 
      condrestart(){
          is_running && restart
          return 0
      }
 
      # See how we were called.
      case "$1" in
          start)
        start
        ;;
          stop)
        stop
        ;;
          status)
        status
        ;;
          restart)
        restart
        ;;
          reload)
        reload
        ;;
          condrestart)
        condrestart
        ;;
          *)
        echo $"Usage: $0 {start|stop|status|restart|condrestart|reload}"
        RETVAL=1
      esac
 
      exit $RETVAL
 
container_commands:
  00_stop_service:
    command: "/sbin/service remote_syslog stop"
    ignoreErrors: true

  01_set_logger_hostname:
    command: ". /tmp/set-logger-hostname.sh"
    
  02_install_remote_syslog_binary:
    command: "cp /home/ec2-user/remote_syslog/remote_syslog /usr/local/bin"
  
  03_enable_service:
    command: "/sbin/chkconfig remote_syslog on"
 
  04_start_service:
    command: "/sbin/service remote_syslog restart"
    ignoreErrors: true