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logstash.lib.sh
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logstash.lib.sh
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# This script is used to initialize a number of env variables and setup the
# runtime environment of logstash. It sets to following env variables:
# LOGSTASH_HOME & LS_HOME
# SINCEDB_DIR
# JAVACMD
# JAVA_OPTS
# GEM_HOME & GEM_PATH
# DEBUG
#
# These functions are provided for the calling script:
# setup() to setup the environment
# ruby_exec() to execute a ruby script with using the setup runtime environment
#
# The following env var will be used by this script if set:
# LS_GEM_HOME and LS_GEM_PATH to overwrite the path assigned to GEM_HOME and GEM_PATH
# LS_JAVA_OPTS to append extra options to the JVM options provided by logstash
# LS_JAVA_HOME to point to the java home
unset CDPATH
# This unwieldy bit of scripting is to try to catch instances where Logstash
# was launched from a symlink, rather than a full path to the Logstash binary
if [ -L "$0" ]; then
# Launched from a symlink
# --Test for the readlink binary
RL="$(command -v readlink)"
if [ $? -eq 0 ]; then
# readlink exists
SOURCEPATH="$($RL $0)"
else
# readlink not found, attempt to parse the output of stat
SOURCEPATH="$(stat -c %N $0 | awk '{print $3}' | sed -e 's/\‘//' -e 's/\’//')"
if [ $? -ne 0 ]; then
# Failed to execute or parse stat
echo "Failed to set LOGSTASH_HOME from $(cd `dirname $0`/..; pwd)/bin/logstash.lib.sh"
echo "You may need to launch Logstash with a full path instead of a symlink."
exit 1
fi
fi
else
# Not a symlink
SOURCEPATH="$0"
fi
LOGSTASH_HOME="$(cd `dirname $SOURCEPATH`/..; pwd)"
export LOGSTASH_HOME
export LS_HOME="${LOGSTASH_HOME}"
SINCEDB_DIR="${LOGSTASH_HOME}"
export SINCEDB_DIR
LOGSTASH_JARS=${LOGSTASH_HOME}/logstash-core/lib/jars
JRUBY_HOME="${LOGSTASH_HOME}/vendor/jruby"
# iterate over the command line args and look for the argument
# after --path.settings to see if the jvm.options file is in
# that path and set LS_JVM_OPTS accordingly
# This fix is for #6379
unset LS_JVM_OPTS
found=0
for i in "$@"; do
if [ $found -eq 1 ]; then
if [ -r "${i}/jvm.options" ]; then
export LS_JVM_OPTS="${i}/jvm.options"
break
fi
fi
if [ "$i" = "--path.settings" ]; then
found=1
fi
done
setup_bundled_jdk_part() {
OS_NAME="$(uname -s)"
if [ $OS_NAME = "Darwin" ]; then
BUNDLED_JDK_PART="jdk.app/Contents/Home"
else
BUNDLED_JDK_PART="jdk"
fi
}
# Accepts 1 parameter which is the path the directory where logstash jar are contained.
setup_classpath() {
local classpath="${1?classpath (and jar_directory) required}"
local jar_directory="${2}"
for J in $(cd "${jar_directory}"; ls *.jar); do
classpath=${classpath}${classpath:+:}${jar_directory}/${J}
done
echo "${classpath}"
}
# set up CLASSPATH once (we start more than one java process)
CLASSPATH="${JRUBY_HOME}/lib/jruby.jar"
CLASSPATH="$(setup_classpath $CLASSPATH $LOGSTASH_JARS)"
setup_java() {
# set the path to java into JAVACMD which will be picked up by JRuby to launch itself
if [ -z "$JAVACMD" ]; then
setup_bundled_jdk_part
JAVACMD_TEST=`command -v java`
if [ -n "$LS_JAVA_HOME" ]; then
echo "Using LS_JAVA_HOME defined java: ${LS_JAVA_HOME}."
if [ -x "$LS_JAVA_HOME/bin/java" ]; then
JAVACMD="$LS_JAVA_HOME/bin/java"
if [ -d "${LOGSTASH_HOME}/${BUNDLED_JDK_PART}" -a -x "${LOGSTASH_HOME}/${BUNDLED_JDK_PART}/bin/java" ]; then
if [ ! -e "${LOGSTASH_HOME}/JDK_VERSION" ]; then
echo "File ${LOGSTASH_HOME}/JDK_VERSION doesn't exists"
exit 1
fi
BUNDLED_JDK_VERSION=`cat "${LOGSTASH_HOME}/JDK_VERSION"`
echo "WARNING: Logstash comes bundled with the recommended JDK(${BUNDLED_JDK_VERSION}), but is overridden by the version defined in LS_JAVA_HOME. Consider clearing LS_JAVA_HOME to use the bundled JDK."
fi
else
echo "Invalid LS_JAVA_HOME, doesn't contain bin/java executable."
fi
elif [ -d "${LOGSTASH_HOME}/${BUNDLED_JDK_PART}" -a -x "${LOGSTASH_HOME}/${BUNDLED_JDK_PART}/bin/java" ]; then
echo "Using bundled JDK: ${LOGSTASH_HOME}/${BUNDLED_JDK_PART}"
JAVACMD="${LOGSTASH_HOME}/${BUNDLED_JDK_PART}/bin/java"
elif [ -n "$JAVACMD_TEST" ]; then
set +e
JAVACMD=`command -v java`
set -e
echo "Using system java: $JAVACMD"
fi
fi
if [ ! -x "$JAVACMD" ]; then
echo "Could not find java; set LS_JAVA_HOME or ensure java is in PATH."
exit 1
fi
# do not let JAVA_TOOL_OPTIONS slip in (as the JVM does by default)
if [ ! -z "$JAVA_TOOL_OPTIONS" ]; then
echo "warning: ignoring JAVA_TOOL_OPTIONS=$JAVA_TOOL_OPTIONS"
unset JAVA_TOOL_OPTIONS
fi
# JAVA_OPTS is not a built-in JVM mechanism but some people think it is so we
# warn them that we are not observing the value of $JAVA_OPTS
if [ ! -z "$JAVA_OPTS" ]; then
echo -n "warning: ignoring JAVA_OPTS=$JAVA_OPTS; "
echo "pass JVM parameters via LS_JAVA_OPTS"
fi
# Set a default GC log file for use by jvm.options _before_ it's called.
if [ -z "$LS_GC_LOG_FILE" ] ; then
LS_GC_LOG_FILE="./logstash-gc.log"
fi
# jruby launcher uses JAVACMD as its java executable and JAVA_OPTS as the JVM options
export JAVACMD
JAVA_OPTS=`exec "${JAVACMD}" -cp "${CLASSPATH}" org.logstash.launchers.JvmOptionsParser "$LOGSTASH_HOME" "$LS_JVM_OPTS"`
EXIT_CODE=$?
if [ $EXIT_CODE -ne 0 ]; then
exit $EXIT_CODE
fi
export JAVA_OPTS
}
setup_vendored_jruby() {
JRUBY_BIN="${JRUBY_HOME}/bin/jruby"
if [ ! -f "${JRUBY_BIN}" ] ; then
echo "Unable to find JRuby."
echo "If you are a user, this is a bug."
echo "If you are a developer, please run 'rake bootstrap'. Running 'rake' requires the 'ruby' program be available."
exit 1
fi
if [ -z "$LS_GEM_HOME" ] ; then
export GEM_HOME="${LOGSTASH_HOME}/vendor/bundle/jruby/3.1.0"
else
export GEM_HOME=${LS_GEM_HOME}
fi
if [ "$DEBUG" ] ; then
echo "Using GEM_HOME=${GEM_HOME}"
fi
if [ -z "$LS_GEM_PATH" ] ; then
export GEM_PATH=${GEM_HOME}
else
export GEM_PATH=${LS_GEM_PATH}
fi
if [ "$DEBUG" ] ; then
echo "Using GEM_PATH=${GEM_PATH}"
fi
}
setup() {
setup_java
setup_vendored_jruby
}
ruby_exec() {
if [ "$DEBUG" ] ; then
echo "DEBUG: exec ${JRUBY_BIN} $@"
fi
exec "${JRUBY_BIN}" "$@"
}