Elasticsearch update - conary version with index flushing

es_udpate.sh

#!/bin/bash

# esearch-update - Updates elasticsearch with various sanity checks
# blame: [email protected]

VERSION=0.18.6
NEWVERSION=0.19.0
CONFIG=/opt/elasticsearch/config/elasticsearch.yml
MONIT=/usr/bin/monit
LIMIT=20
NEWPORT1=9123
NEWPORT2=9124
APP=elasticsearch
declare -a DATASPACE=($(du -s -h /var/lib/elasticsearch/ | sed -n "s/\([0-9.]*\)\([GM]\).*/\1 \2/p"))
declare -a VARSPACE=($(df -h /var | sed -n '3p' | awk '{ print $3}' | sed -n "s/\([0-9.]*\)\([GM]\).*/\1\ \2/p"))

# This upgrade requires a flushing of indices 
flushIndices () {
  echo "Flushing indices"
  if (curl -XPOST 'http://localhost:9123/_flush' | grep "true")
  then
    echo "Successfully flushed indices"
  else
    echo "###  ALERT ! ALERT  ###"
    echo "Failed to flush indices"
    exit 98
  fi
}

# Check is space is available for a backup
checkSpace () {
  # Return if unit is not G
  if [ "${DATASPACE[1]}" != "G" ]
  then
    echo "Plenty of space for a backup."
    return
  fi

  # Exit if data is more G than free space
  DANGER=$(awk -vfree="${VARSPACE[0]}" -vdata="${DATASPACE[0]}" 'BEGIN{print (data<=free ? 0 : 1)}')
  if [ "$DANGER" -eq 1 ]
  then
    echo "Sorry - there is no room for a backup"
    echo "Please make some room"
    exit
  fi
}
    
# Set perms
zapPerms () {
  chmod 644 $CONFIG
}
resetConf () {
  mv -v $CONFIG.bak $CONFIG
}

#---
#  Let's get this party started.
#---

# Check ES version
if (conary q elasticsearch-server --info | sed -n 2p | grep $VERSION >& /dev/null)
then
  echo "Version $VERSION is installed"
else
  echo "Version $VERSION is not installed"
  exit 99
fi

# Is ES up and running with the expected version?
if (curl -s http://localhost:9200/ | grep "$VERSION" >& /dev/null)
then
  echo "$APP is running"
else
  echo "$APP is not running - Exiting!"
  exit 100
fi

# Is the config file in the proper location?
if [ -f $CONFIG ]
then
  echo "$APP Config is where we expect it"
else
  echo "$APP Config is AWOL - Exiting!"
  exit 101
fi

# Do we have space?
checkSpace

# rsync data 
#BACKUP=`mktemp -d /var/esearchXXXXX`
rsync -avz /var/lib/elasticsearch /var/esearch23106

# STOP ES
#$MONIT stop $APP
/etc/init.d/$APP stop

# Configure ES to use non-standard ports
sed -i.bak -e's/port:\s* 9200/port: 9123/;s/port:\s*9300/port: 9124/' $CONFIG
zapPerms

# START  ES with old version and new config
#$MONIT start $APP
/etc/init.d/$APP start

for ((a=1; a <= LIMIT ; a++))
do
  if (netstat -pantu | grep "9123" >& /dev/null)
  then
    echo "$APP is running on the new port"
    break
  elif [ $a = $LIMIT ]
  then
      echo "$APP is not running on the new port - Exiting"
      resetConf
      exit 103
  fi
  echo -n "*"
  sleep 2
done

# FLUSH
flushIndices

# STOP listening on the bogus port
#$MONIT stop $APP
/etc/init.d/$APP stop

# Install new version
conary update $APP-server --install-label=example-platform.localdomain@example:example-platform-1

# Check version again
if (conary q elasticsearch-server --info | sed -n 2p | grep $NEWVERSION >& /dev/null)
then
  echo "Version $NEWVERSION is installed"
else
  echo "#### OH BOY THIS IS REALLY BAD ####"
  echo "Version $NEWVERSION is not installed"
  resetConf
  exit 105
fi

# mv backup back into place restart
resetConf
#$MONIT start $APP
/etc/init.d/$APP start

for ((a=1; a <= LIMIT ; a++))
do
  if (netstat -pantu | grep "9200" >& /dev/null)
  then
    echo "$APP is running on the original port"
    break
  fi
  echo -n "*"
done

# Check for bogus port
if (netstat -pantu | grep "9123" >& /dev/null)
then
  echo "### ALERT ###"
  echo "BOGUS PORT IN"
  echo "###  USE  ###"
  echo "Check with netstat -pantu | grep '9123' "
  exit 106
fi

exit