System installer script

system-install.sh

#!/bin/sh

unset CDPATH
. "$(cd `dirname $0`/..; pwd)/bin/logstash.lib.sh"
setup

for file in /etc/default/logstash /etc/sysconfig/logstash; do
  if [ -f "$file" ]; then
    . $file
  fi
done

# bin/logstash-plugin is a short lived ruby script thus we can use aggressive "faster starting JRuby options"
# see https://github.com/jruby/jruby/wiki/Improving-startup-time
export JRUBY_OPTS="$JRUBY_OPTS -J-XX:+TieredCompilation -J-XX:TieredStopAtLevel=1 -J-noverify -X-C -Xcompile.invokedynamic=false"

args=$@
tempfile=$(mktemp)

# If there are args, append the path to the Logstash script
if [ ${#args[@]} -gt 1 ]; then
  args+=("$(cd `dirname $0`/..; pwd)/bin/logstash")
# if there are no args, then use these defaults
else
  args=("--log" "$tempfile" "--install" "--name" "logstash" "--user" "logstash" "--group" "logstash" "--description" "logstash" "--nice" "${LS_NICE}" "--limit-open-files" "${LS_OPEN_FILES}" "--prestart" "/bin/touch ${LS_LOG_FILE}" "$(cd `dirname $0`/..; pwd)/bin/logstash -f ${LS_CONF_DIR} -l ${LS_LOG_FILE} ${LS_OPTS}")
fi

capture="$(ruby_exec "${LOGSTASH_HOME}/lib/systeminstall/pleasewrap.rb" "${args[@]}")"
exit_code=$?

if [ $exit_code -ne 0 ]; then
  cat $tempfile
  echo "Unable to install system startup script for Logstash."
else
  if [ -f "/lib/systemd/system/logstash.service" ]; then
    if [ ! -f "/etc/default/logstash" ]; then
      sed -i -e 's|EnvironmentFile=/etc/default/logstash|#EnvironmentFile=/etc/default/logstash|' /lib/systemd/system/logstash.service
    fi
    if [ ! -f "/etc/sysconfig/logstash" ]; then
      sed -i -e 's|EnvironmentFile=/etc/sysconfig/logstash|#EnvironmentFile=/etc/sysconfig/logstash|' /lib/systemd/system/logstash.service
    fi
    systemctl --system daemon-reload
    ec=$?
    if [ $ec -ne 0 ]; then
      echo "'systemctl --system daemon-reload' failed. Check the output of 'systemctl status logstash.service'"
    else
      echo "Successfully created system startup script for Logstash"
      rm $tempfile
      exit 0
    fi
  fi
  echo "Successfully created system startup script for Logstash"
fi
rm $tempfile