326 lines
12 KiB
Bash
326 lines
12 KiB
Bash
#!/usr/bin/env bash
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# If this scripted is run out of /usr/bin or some other system bin directory
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# it should be linked to and not copied. Things like java jar files are found
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# relative to the canonical path of this script.
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#
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# TODO_MA 马中华 注释： 如果一个大数据技术组件的底层源码实现是 java
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# TODO_MA 马中华 注释： 那么 shell 命令的规范，就一定是先准备各种参数，然后通过 java 命令启动一个 JVM 执行某个类的 main()
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# use POSIX interface, symlink is followed automatically
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ZOOBIN="${BASH_SOURCE-$0}"
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ZOOBIN="$(dirname "${ZOOBIN}")"
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ZOOBINDIR="$(cd "${ZOOBIN}"; pwd)"
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if [ -e "$ZOOBIN/../libexec/zkEnv.sh" ]; then
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. "$ZOOBINDIR"/../libexec/zkEnv.sh
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else
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. "$ZOOBINDIR"/zkEnv.sh
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fi
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# See the following page for extensive details on setting
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# up the JVM to accept JMX remote management:
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# http://java.sun.com/javase/6/docs/technotes/guides/management/agent.html
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# by default we allow local JMX connections
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if [ "x$JMXLOCALONLY" = "x" ]
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then
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JMXLOCALONLY=false
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fi
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if [ "x$JMXDISABLE" = "x" ] || [ "$JMXDISABLE" = 'false' ]
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then
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echo "ZooKeeper JMX enabled by default" >&2
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if [ "x$JMXPORT" = "x" ]
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then
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# for some reason these two options are necessary on jdk6 on Ubuntu
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# accord to the docs they are not necessary, but otw jconsole cannot
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# do a local attach
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ZOOMAIN="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.local.only=$JMXLOCALONLY org.apache.zookeeper.server.quorum.QuorumPeerMain"
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else
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if [ "x$JMXAUTH" = "x" ]
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then
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JMXAUTH=false
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fi
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if [ "x$JMXSSL" = "x" ]
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then
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JMXSSL=false
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fi
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if [ "x$JMXLOG4J" = "x" ]
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then
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JMXLOG4J=true
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fi
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echo "ZooKeeper remote JMX Port set to $JMXPORT" >&2
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echo "ZooKeeper remote JMX authenticate set to $JMXAUTH" >&2
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echo "ZooKeeper remote JMX ssl set to $JMXSSL" >&2
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echo "ZooKeeper remote JMX log4j set to $JMXLOG4J" >&2
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ZOOMAIN="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=$JMXPORT -Dcom.sun.management.jmxremote.authenticate=$JMXAUTH -Dcom.sun.management.jmxremote.ssl=$JMXSSL -Dzookeeper.jmx.log4j.disable=$JMXLOG4J org.apache.zookeeper.server.quorum.QuorumPeerMain"
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fi
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else
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echo "JMX disabled by user request" >&2
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# TODO_MA 马中华 注释： 运行主类
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# TODO_MA 马中华 注释：ZK JVM 进程的名称： QuorumPeerMain
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# TODO_MA 马中华 注释：QuorumPeer + Main ==> 这个类的作用，就是启动 QuorumPeer
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# TODO_MA 马中华 注释：QuorumPeer 代表了一台服务器的全部功能实现！
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ZOOMAIN="org.apache.zookeeper.server.quorum.QuorumPeerMain"
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fi
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if [ "x$SERVER_JVMFLAGS" != "x" ]
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then
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JVMFLAGS="$SERVER_JVMFLAGS $JVMFLAGS"
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fi
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if [ "x$2" != "x" ]
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then
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ZOOCFG="$ZOOCFGDIR/$2"
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fi
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# if we give a more complicated path to the config, don't screw around in $ZOOCFGDIR
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if [ "x$(dirname "$ZOOCFG")" != "x$ZOOCFGDIR" ]
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then
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ZOOCFG="$2"
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fi
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if $cygwin
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then
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ZOOCFG=`cygpath -wp "$ZOOCFG"`
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# cygwin has a "kill" in the shell itself, gets confused
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KILL=/bin/kill
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else
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KILL=kill
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fi
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echo "Using config: $ZOOCFG" >&2
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case "$OSTYPE" in
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*solaris*)
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GREP=/usr/xpg4/bin/grep
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;;
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*)
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GREP=grep
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;;
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esac
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ZOO_DATADIR="$($GREP "^[[:space:]]*dataDir" "$ZOOCFG" | sed -e 's/.*=//')"
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ZOO_DATADIR="$(echo -e "${ZOO_DATADIR}" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
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ZOO_DATALOGDIR="$($GREP "^[[:space:]]*dataLogDir" "$ZOOCFG" | sed -e 's/.*=//')"
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# iff autocreate is turned off and the datadirs don't exist fail
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# immediately as we can't create the PID file, etc..., anyway.
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if [ -n "$ZOO_DATADIR_AUTOCREATE_DISABLE" ]; then
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if [ ! -d "$ZOO_DATADIR/version-2" ]; then
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echo "ZooKeeper data directory is missing at $ZOO_DATADIR fix the path or run initialize"
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exit 1
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fi
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if [ -n "$ZOO_DATALOGDIR" ] && [ ! -d "$ZOO_DATALOGDIR/version-2" ]; then
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echo "ZooKeeper txnlog directory is missing at $ZOO_DATALOGDIR fix the path or run initialize"
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exit 1
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fi
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ZOO_DATADIR_AUTOCREATE="-Dzookeeper.datadir.autocreate=false"
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fi
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if [ -z "$ZOOPIDFILE" ]; then
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if [ ! -d "$ZOO_DATADIR" ]; then
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mkdir -p "$ZOO_DATADIR"
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fi
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ZOOPIDFILE="$ZOO_DATADIR/zookeeper_server.pid"
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else
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# ensure it exists, otw stop will fail
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mkdir -p "$(dirname "$ZOOPIDFILE")"
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fi
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if [ ! -w "$ZOO_LOG_DIR" ] ; then
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mkdir -p "$ZOO_LOG_DIR"
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fi
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ZOO_LOG_FILE=zookeeper-$USER-server-$HOSTNAME.log
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_ZOO_DAEMON_OUT="$ZOO_LOG_DIR/zookeeper-$USER-server-$HOSTNAME.out"
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# TODO_MA 马中华 注释： zkServer.sh start
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# TODO_MA 马中华 注释： $1 = start
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case $1 in
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start)
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echo -n "Starting zookeeper ... "
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if [ -f "$ZOOPIDFILE" ]; then
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if kill -0 `cat "$ZOOPIDFILE"` > /dev/null 2>&1; then
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echo $command already running as process `cat "$ZOOPIDFILE"`.
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exit 1
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fi
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fi
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# TODO_MA 马中华 注释： 核心的启动命令4
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# TODO_MA 马中华 注释： $JAVA = $JAVA_HOME/bin/java
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# TODO_MA 马中华 注释： $ZOOMAIN = 核心java类 = QuorumPeerMain
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# TODO_MA 马中华 注释： "$ZOOCFG" = zoo.cfg 的路径 = $ZOOKEEPER_HOME/conf/zoo.cfg
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nohup "$JAVA" $ZOO_DATADIR_AUTOCREATE "-Dzookeeper.log.dir=${ZOO_LOG_DIR}" \
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"-Dzookeeper.log.file=${ZOO_LOG_FILE}" "-Dzookeeper.root.logger=${ZOO_LOG4J_PROP}" \
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-XX:+HeapDumpOnOutOfMemoryError -XX:OnOutOfMemoryError='kill -9 %p' \
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-cp "$CLASSPATH" $JVMFLAGS $ZOOMAIN "$ZOOCFG" > "$_ZOO_DAEMON_OUT" 2>&1 < /dev/null &
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if [ $? -eq 0 ]
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then
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case "$OSTYPE" in
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*solaris*)
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/bin/echo "${!}\\c" > "$ZOOPIDFILE"
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;;
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*)
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/bin/echo -n $! > "$ZOOPIDFILE"
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;;
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esac
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if [ $? -eq 0 ];
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then
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sleep 1
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pid=$(cat "${ZOOPIDFILE}")
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if ps -p "${pid}" > /dev/null 2>&1; then
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echo STARTED
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else
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echo FAILED TO START
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exit 1
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fi
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else
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echo FAILED TO WRITE PID
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exit 1
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fi
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else
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echo SERVER DID NOT START
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exit 1
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fi
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;;
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start-foreground)
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ZOO_CMD=(exec "$JAVA")
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if [ "${ZOO_NOEXEC}" != "" ]; then
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ZOO_CMD=("$JAVA")
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fi
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"${ZOO_CMD[@]}" $ZOO_DATADIR_AUTOCREATE "-Dzookeeper.log.dir=${ZOO_LOG_DIR}" \
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"-Dzookeeper.log.file=${ZOO_LOG_FILE}" "-Dzookeeper.root.logger=${ZOO_LOG4J_PROP}" \
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-XX:+HeapDumpOnOutOfMemoryError -XX:OnOutOfMemoryError='kill -9 %p' \
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-cp "$CLASSPATH" $JVMFLAGS $ZOOMAIN "$ZOOCFG"
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;;
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print-cmd)
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echo "\"$JAVA\" $ZOO_DATADIR_AUTOCREATE -Dzookeeper.log.dir=\"${ZOO_LOG_DIR}\" \
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-Dzookeeper.log.file=\"${ZOO_LOG_FILE}\" -Dzookeeper.root.logger=\"${ZOO_LOG4J_PROP}\" \
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-XX:+HeapDumpOnOutOfMemoryError -XX:OnOutOfMemoryError='kill -9 %p' \
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-cp \"$CLASSPATH\" $JVMFLAGS $ZOOMAIN \"$ZOOCFG\" > \"$_ZOO_DAEMON_OUT\" 2>&1 < /dev/null"
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;;
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stop)
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echo -n "Stopping zookeeper ... "
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if [ ! -f "$ZOOPIDFILE" ]
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then
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echo "no zookeeper to stop (could not find file $ZOOPIDFILE)"
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else
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$KILL $(cat "$ZOOPIDFILE")
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rm "$ZOOPIDFILE"
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sleep 1
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echo STOPPED
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fi
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exit 0
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;;
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version)
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ZOOMAIN=org.apache.zookeeper.version.VersionInfoMain
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$JAVA -cp "$CLASSPATH" $ZOOMAIN 2> /dev/null
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;;
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restart)
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shift
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"$0" stop ${@}
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sleep 3
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"$0" start ${@}
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;;
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status)
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# -q is necessary on some versions of linux where nc returns too quickly, and no stat result is output
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isSSL="false"
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clientPortAddress=`$GREP "^[[:space:]]*clientPortAddress[^[:alpha:]]" "$ZOOCFG" | sed -e 's/.*=//'`
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if ! [ $clientPortAddress ]
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then
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clientPortAddress="localhost"
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fi
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clientPort=`$GREP "^[[:space:]]*clientPort[^[:alpha:]]" "$ZOOCFG" | sed -e 's/.*=//'`
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if ! [[ "$clientPort" =~ ^[0-9]+$ ]]
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then
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dataDir=`$GREP "^[[:space:]]*dataDir" "$ZOOCFG" | sed -e 's/.*=//'`
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myid=`cat "$dataDir/myid" 2> /dev/null`
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if ! [[ "$myid" =~ ^[0-9]+$ ]] ; then
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echo "myid could not be determined, will not able to locate clientPort in the server configs."
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else
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clientPortAndAddress=`$GREP "^[[:space:]]*server.$myid=.*;.*" "$ZOOCFG" | sed -e 's/.*=//' | sed -e 's/.*;//'`
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if [ ! "$clientPortAndAddress" ] ; then
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echo "Client port not found in static config file. Looking in dynamic config file."
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dynamicConfigFile=`$GREP "^[[:space:]]*dynamicConfigFile" "$ZOOCFG" | sed -e 's/.*=//'`
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clientPortAndAddress=`$GREP "^[[:space:]]*server.$myid=.*;.*" "$dynamicConfigFile" | sed -e 's/.*=//' | sed -e 's/.*;//'`
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fi
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if [ ! "$clientPortAndAddress" ] ; then
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echo "Client port not found in the server configs"
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else
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if [[ "$clientPortAndAddress" =~ ^.*:[0-9]+ ]] ; then
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if [[ "$clientPortAndAddress" =~ \[.*\]:[0-9]+ ]] ; then
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# Extracts address from address:port for example extracts 127::1 from "[127::1]:2181"
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clientPortAddress=`echo "$clientPortAndAddress" | sed -e 's|\[||' | sed -e 's|\]:.*||'`
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else
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clientPortAddress=`echo "$clientPortAndAddress" | sed -e 's/:.*//'`
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fi
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fi
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clientPort=`echo "$clientPortAndAddress" | sed -e 's/.*://'`
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fi
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fi
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fi
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if [ ! "$clientPort" ] ; then
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echo "Client port not found. Looking for secureClientPort in the static config."
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secureClientPort=`$GREP "^[[:space:]]*secureClientPort[^[:alpha:]]" "$ZOOCFG" | sed -e 's/.*=//'`
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if [ "$secureClientPort" ] ; then
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isSSL="true"
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clientPort=$secureClientPort
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clientPortAddress=`$GREP "^[[:space:]]*secureClientPortAddress[^[:alpha:]]" "$ZOOCFG" | sed -e 's/.*=//'`
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if ! [ $clientPortAddress ]
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then
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clientPortAddress="localhost"
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fi
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else
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echo "Unable to find either secure or unsecure client port in any configs. Terminating."
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exit 1
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fi
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fi
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echo "Client port found: $clientPort. Client address: $clientPortAddress. Client SSL: $isSSL."
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STAT=`"$JAVA" "-Dzookeeper.log.dir=${ZOO_LOG_DIR}" "-Dzookeeper.root.logger=${ZOO_LOG4J_PROP}" "-Dzookeeper.log.file=${ZOO_LOG_FILE}" \
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-cp "$CLASSPATH" $CLIENT_JVMFLAGS $JVMFLAGS org.apache.zookeeper.client.FourLetterWordMain \
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$clientPortAddress $clientPort srvr $isSSL 2> /dev/null \
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| $GREP Mode`
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if [ "x$STAT" = "x" ]
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then
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if [ "$isSSL" = "true" ] ; then
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echo " "
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echo "Note: We used secureClientPort ($secureClientPort) to establish connection, but we failed. The 'status'"
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echo " command establishes a client connection to the server to execute diagnostic commands. Please make sure you"
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echo " provided all the Client SSL connection related parameters in the CLIENT_JVMFLAGS environment variable! E.g.:"
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echo " CLIENT_JVMFLAGS=\"-Dzookeeper.clientCnxnSocket=org.apache.zookeeper.ClientCnxnSocketNetty"
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echo " -Dzookeeper.ssl.trustStore.location=/tmp/clienttrust.jks -Dzookeeper.ssl.trustStore.password=password"
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echo " -Dzookeeper.ssl.keyStore.location=/tmp/client.jks -Dzookeeper.ssl.keyStore.password=password"
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echo " -Dzookeeper.client.secure=true\" ./zkServer.sh status"
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echo " "
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fi
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echo "Error contacting service. It is probably not running."
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exit 1
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else
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echo $STAT
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exit 0
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fi
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;;
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*)
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echo "Usage: $0 [--config <conf-dir>] {start|start-foreground|stop|version|restart|status|print-cmd}" >&2
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esac
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