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

#!/bin/sh

# Copyright 1999-2018 Alibaba Group Holding Ltd.
# 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"
    fi
  else
    JAVA_PATH=`dirname $(readlink -f $(which javac))`
    if [ "x$JAVA_PATH" != "x" ]; then
      export JAVA_HOME=`dirname $JAVA_PATH 2>/dev/null`
    fi
  fi
  if [ -z "$JAVA_HOME" ]; then
        error_exit "Please set the JAVA_HOME variable in your environment, We need java(x64)! jdk8 or later is better!"
  fi
fi

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
do
    case $opt in
        m)
            MODE=$OPTARG;;
        f)
            FUNCTION_MODE=$OPTARG;;
        s)
            SERVER=$OPTARG;;
        c)
            MEMBER_LIST=$OPTARG;;
        p)
            EMBEDDED_STORAGE=$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="${JAVA_OPT} -DembeddedStorage=true"
    fi
    JAVA_OPT="${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"

fi

if [[ "${FUNCTION_MODE}" == "config" ]]; then
    JAVA_OPT="${JAVA_OPT} -Dnacos.functionMode=config"
elif [[ "${FUNCTION_MODE}" == "naming" ]]; then
    JAVA_OPT="${JAVA_OPT} -Dnacos.functionMode=naming"
fi

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"
fi

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
fi

echo "$JAVA ${JAVA_OPT}"

if [[ "${MODE}" == "standalone" ]]; then
    echo "nacos is starting with standalone"
else
    echo "nacos is starting with cluster"
fi

# check the start.out log output file
if [ ! -f "${BASE_DIR}/logs/start.out" ]; then
  touch "${BASE_DIR}/logs/start.out"
fi
# 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