| #!/usr/bin/env bash |
| |
| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to You under the Apache License, Version 2.0 |
| # (the "License"); you may not use this file except in compliance with |
| # the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| |
| # Runs a Chukwa command as a daemon. |
| # |
| # Environment Variables |
| # |
| # CHUKWA_CONF_DIR Alternate conf dir. Default is ${CHUKWA_HOME}/conf. |
| # CHUKWA_LOG_DIR Where log files are stored. PWD by default. |
| # CHUKWA_MASTER host:path where chukwa code should be rsync'd from |
| # CHUKWA_PID_DIR The pid files are stored. ${CHUKWA_HOME}/var/tmp by default. |
| # CHUKWA_IDENT_STRING A string representing this instance of chukwa. $USER by default |
| # CHUKWA_NICENESS The scheduling priority for daemons. Defaults to 0. |
| ## |
| |
| usage="Usage: chukwa-daemon.sh [--config <conf-dir>] [--hosts hostlistfile] (start|stop) <chukwa-command> <args...>" |
| |
| # if no args specified, show usage |
| if [ $# -le 1 ]; then |
| echo $usage |
| exit 1 |
| fi |
| |
| bin=`dirname "$0"` |
| bin=`cd "$bin"; pwd` |
| |
| . "$bin"/../libexec/chukwa-config.sh |
| |
| # get arguments |
| startStop=$1 |
| shift |
| command=$1 |
| shift |
| |
| chukwa_rotate_log () |
| { |
| log=$1; |
| num=5; |
| if [ -n "$2" ]; then |
| num=$2 |
| fi |
| if [ -f "$log" ]; then # rotate logs |
| while [ $num -gt 1 ]; do |
| prev=`expr $num - 1` |
| [ -f "$log.$prev" ] && mv "$log.$prev" "$log.$num" |
| num=$prev |
| done |
| mv "$log" "$log.$num"; |
| fi |
| } |
| |
| if [ -f "${CHUKWA_CONF_DIR}/chukwa-env.sh" ]; then |
| . "${CHUKWA_CONF_DIR}/chukwa-env.sh" |
| fi |
| |
| # get log directory |
| if [ "$CHUKWA_LOG_DIR" = "" ]; then |
| export CHUKWA_LOG_DIR="$CHUKWA_HOME/logs" |
| fi |
| mkdir -p "$CHUKWA_LOG_DIR" |
| |
| if [ "$CHUKWA_PID_DIR" = "" ]; then |
| CHUKWA_PID_DIR=$CHUKWA_HOME/var/run |
| fi |
| |
| if [ "$CHUKWA_IDENT_STRING" = "" ]; then |
| export CHUKWA_IDENT_STRING="$USER" |
| fi |
| |
| # some variables |
| export CHUKWA_LOGFILE=chukwa-$CHUKWA_IDENT_STRING-$command-$HOSTNAME.log |
| export CHUKWA_ROOT_LOGGER="INFO,DRFA" |
| log=$CHUKWA_LOG_DIR/chukwa-$CHUKWA_IDENT_STRING-$command-$HOSTNAME.out |
| pid=$CHUKWA_PID_DIR/chukwa-$CHUKWA_IDENT_STRING-$command.pid |
| |
| # Set default scheduling priority |
| if [ "$CHUKWA_NICENESS" = "" ]; then |
| export CHUKWA_NICENESS=0 |
| fi |
| |
| case $startStop in |
| |
| (start) |
| |
| mkdir -p "$CHUKWA_PID_DIR" |
| |
| if [ -f $pid ]; then |
| if kill -0 `cat $pid` > /dev/null 2>&1; then |
| echo $command running as process `cat $pid`. Stop it first. |
| exit 1 |
| fi |
| fi |
| |
| if [ "$CHUKWA_MASTER" != "" ]; then |
| echo rsync from $CHUKWA_MASTER |
| rsync -a -e ssh --delete --exclude=.svn $CHUKWA_MASTER/ "$CHUKWA_HOME" |
| fi |
| |
| chukwa_rotate_log $log |
| echo starting $command, logging to $log |
| cd "$CHUKWA_HOME" |
| nohup nice -n $CHUKWA_NICENESS "$CHUKWA_HOME"/bin/chukwa --config $CHUKWA_CONF_DIR $command "$@" > "$log" 2>&1 < /dev/null & |
| echo $! > $pid |
| sleep 1; head "$log" |
| ;; |
| |
| (stop) |
| |
| $CHUKWA_HOME/bin/chukwa --config $CHUKWA_CONF_DIR $command stop |
| ;; |
| |
| (*) |
| echo $usage |
| exit 1 |
| ;; |
| |
| esac |
| |
| |