java运行startup文件,Nacos源码篇-distribution模块-服务启动脚本（startup.sh）

最新推荐文章于 2025-04-24 23:04:47 发布

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最新推荐文章于 2025-04-24 23:04:47 发布

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文章标签： java运行startup文件

本文解析了Nacos服务启动脚本的关键配置项，包括JAVA_HOME环境变量设置、JVM参数配置、运行模式及功能模式设定等，并介绍了如何通过脚本启动Nacos服务。

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#!/bin/sh

# Licensed 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.

cygwin=false

darwin=false

os400=false

case "`uname`" in

CYGWIN*) cygwin=true;;

Darwin*) darwin=true;;

OS400*) os400=true;;

esac

error_exit ()

{

echo "ERROR: $1 !!"

exit 1

}

[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=$HOME/jdk/java

[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=/usr/java

[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=/opt/taobao/java

[ ! -e "$JAVA_HOME/bin/java" ] && unset JAVA_HOME

if [ -z "$JAVA_HOME" ]; then

if $darwin; then

if [ -x '/usr/libexec/java_home' ] ; then

export JAVA_HOME=`/usr/libexec/java_home`

elif [ -d "/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Home" ]; then

export JAVA_HOME="/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Home"

else

JAVA_PATH=`dirname $(readlink -f $(which javac))`

if [ "x$JAVA_PATH" != "x" ]; then

export JAVA_HOME=`dirname $JAVA_PATH 2>/dev/null`

if [ -z "$JAVA_HOME" ]; then

error_exit "Please set the JAVA_HOME variable in your environment, We need java(x64)! jdk8 or later is better!"

export SERVER="nacos-server"

export MODE="cluster"

export FUNCTION_MODE="all"

export MEMBER_LIST=""

export EMBEDDED_STORAGE=""

while getopts ":m:f:s:c:p:" opt

case $opt in

MODE=$OPTARG;;

FUNCTION_MODE=$OPTARG;;

SERVER=$OPTARG;;

MEMBER_LIST=$OPTARG;;

EMBEDDED_STORAGE=$OPTARG;;

echo "Unknown parameter"

exit 1;;

esac

done

export JAVA_HOME

export JAVA="$JAVA_HOME/bin/java"

export BASE_DIR=`cd $(dirname $0)/..; pwd`

export DEFAULT_SEARCH_LOCATIONS="classpath:/,classpath:/config/,file:./,file:./config/"

export CUSTOM_SEARCH_LOCATIONS=${DEFAULT_SEARCH_LOCATIONS},file:${BASE_DIR}/conf/

#===========================================================================================

# JVM Configuration

#===========================================================================================

if [[ "${MODE}" == "standalone" ]]; then

JAVA_OPT="${JAVA_OPT} -Xms512m -Xmx512m -Xmn256m"

JAVA_OPT="${JAVA_OPT} -Dnacos.standalone=true"

else

if [[ "${EMBEDDED_STORAGE}" == "embedded" ]]; then

JAVA_OPT="${JAVA_OPT} -DembeddedStorage=true"

JAVA_OPT="${JAVA_OPT} -server -Xms2g -Xmx2g -Xmn1g -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m"

JAVA_OPT="${JAVA_OPT} -XX:-OmitStackTraceInFastThrow -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=${BASE_DIR}/logs/java_heapdump.hprof"

JAVA_OPT="${JAVA_OPT} -XX:-UseLargePages"

if [[ "${FUNCTION_MODE}" == "config" ]]; then

JAVA_OPT="${JAVA_OPT} -Dnacos.functionMode=config"

elif [[ "${FUNCTION_MODE}" == "naming" ]]; then

JAVA_OPT="${JAVA_OPT} -Dnacos.functionMode=naming"

JAVA_OPT="${JAVA_OPT} -Dnacos.member.list=${MEMBER_LIST}"

JAVA_MAJOR_VERSION=$($JAVA -version 2>&1 | sed -E -n 's/.* version "([0-9]*).*$/\1/p')

if [[ "$JAVA_MAJOR_VERSION" -ge "9" ]] ; then

JAVA_OPT="${JAVA_OPT} -Xlog:gc*:file=${BASE_DIR}/logs/nacos_gc.log:time,tags:filecount=10,filesize=102400"

else

JAVA_OPT="${JAVA_OPT} -Djava.ext.dirs=${JAVA_HOME}/jre/lib/ext:${JAVA_HOME}/lib/ext"

JAVA_OPT="${JAVA_OPT} -Xloggc:${BASE_DIR}/logs/nacos_gc.log -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=100M"

JAVA_OPT="${JAVA_OPT} -Dloader.path=${BASE_DIR}/plugins/health,${BASE_DIR}/plugins/cmdb,${BASE_DIR}/plugins/mysql"

JAVA_OPT="${JAVA_OPT} -Dnacos.home=${BASE_DIR}"

JAVA_OPT="${JAVA_OPT} -jar ${BASE_DIR}/target/${SERVER}.jar"

JAVA_OPT="${JAVA_OPT} ${JAVA_OPT_EXT}"

JAVA_OPT="${JAVA_OPT} --spring.config.location=${CUSTOM_SEARCH_LOCATIONS}"

JAVA_OPT="${JAVA_OPT} --logging.config=${BASE_DIR}/conf/nacos-logback.xml"

JAVA_OPT="${JAVA_OPT} --server.max-http-header-size=524288"

if [ ! -d "${BASE_DIR}/logs" ]; then

mkdir ${BASE_DIR}/logs

echo "$JAVA ${JAVA_OPT}"

if [[ "${MODE}" == "standalone" ]]; then

echo "nacos is starting with standalone"

else

echo "nacos is starting with cluster"

# check the start.out log output file

if [ ! -f "${BASE_DIR}/logs/start.out" ]; then

touch "${BASE_DIR}/logs/start.out"

# start

echo "$JAVA ${JAVA_OPT}" > ${BASE_DIR}/logs/start.out 2>&1 &

nohup $JAVA ${JAVA_OPT} nacos.nacos >> ${BASE_DIR}/logs/start.out 2>&1 &

echo "nacos is starting，you can check the ${BASE_DIR}/logs/start.out"

View Code

直接看脚本最后几行：

可以看到是使用“nohup”启动的。

继续往上找“JAVA_OPT”，会发现“”

顺势找到“SERVER”，这个变量

然后找到打包的配置文件

然后可以全局搜索找下，nacos-server.jar是哪生成的。最后发现刚好是依赖到的 console模块里面打包出来的

下一篇：接着看我们来看看console这个模块

标签：OPT,JAVA,startup,Nacos,BASE,源码,export,HOME,DIR

来源： https://www.cnblogs.com/HendSame-JMZ/p/13048828.html