前言

服务器上有一些应用，启动步骤比较繁琐，需要依次启动多个服务。服务之间存在依赖关系。例如：必须服务1启动成功才能启动服务2。现将启动服务的步骤写成了sh脚本，大家可以参考这个脚本写一个自己服务的启动脚本。本文主要以Karfka和RocketMQ为案例。

Karfka

Karfka需要依次启动的服务有：Zookeeper，Kafka，Eagle。在启动上下一个服务时会判断上一个服务是否启动成功。
参考脚本如下：

#!/bin/bash# 启动Zookeeper
cd /www/wwwroot/install/apache-zookeeper-3.7.1-bin/bin
# 检查Zookeeper是否启动成功
if ./zkServer.sh status | grep "Mode: "; thenecho "Zookeeper is started.";
elseecho "Zookeeper is Starting ...";./zkServer.sh start zoo.cfgwhile true; doif ./zkServer.sh status | grep "Mode: "; thenecho "Zookeeper started successfully.";breakelsesleep 1fidone
fi# 启动Kafka
cd /www/wwwroot/install/kafka_2.12-3.5.0
# 检查Zookeeper是否启动成功
if ./bin/kafka-topics.sh  --list --bootstrap-server dev-study:9092 >/dev/null 2>&1; thenecho "Kafka is started.";
elseecho "Kafka is starting...";./bin/kafka-server-start.sh -daemon config/server.propertieswhile true; doif ./bin/kafka-topics.sh  --list --bootstrap-server dev-study:9092 >/dev/null 2>&1; thenecho "Kafka started successfully.";breakelsesleep 1fidone
fi# 启动Kafka Eagle
cd /www/wwwroot/install/kafka-eagle
# 检查Zookeeper是否启动成功
if bin/ke.sh status | grep "is running"; thenecho "Eagle is started.";
elseecho "Eagle is starting...";./bin/ke.sh startwhile true; doif bin/ke.sh status | grep "is running"; thenecho "Eagle started successfully.";breakelsesleep 1fidone
fiecho "All services started successfully.";

RocketMQ

RocketMQ需要依次启动的服务有：nameserver，broker，dashboard。在启动上下一个服务时会判断上一个服务是否启动成功。（这些服务如何安装？）
参考脚本如下：

#!/bin/bash#软件安装目录设置，先读环境变量，读不到则用默认值
ROCKETMQ_HOME=$ROCKETMQ_HOME
if [ -z $ROCKETMQ_HOME]; thenecho "ROCKETMQ_HOME is not set! the program will use default value"ROCKETMQ_HOME=/www/wwwroot/install/rocketmq-all-4.9.7-bin-release
fi
echo "ROCKETMQ_HOME=$ROCKETMQ_HOME"# 启动rocketmq nameserver
cd ${ROCKETMQ_HOME}/bin
# 检查nameserver是否启动成功
if jps -ml | grep "namesrv.NamesrvStartup"; thenecho "rocketmq nameserver is running.";
elseecho "rocketmq nameserver is Starting ...";rm -rf nohup.out;nohup sh mqnamesrv &count=0while [ $count -le 10 ]; doif tail -100 nohup.out | grep "Name Server boot success"; thenecho "rocketmq nameserver has been started successfully";breakelsecount=$((count+1))sleep 2fidone
fi# 启动rocketmq broker
# 检查broker是否启动成功
if jps -ml | grep "org.apache.rocketmq.broker.BrokerStartup"; thenecho "rocketmq broker is running.";
elseecho "rocketmq broker is Starting ...";rm -rf nohup.out;nohup sh mqbroker -c ../conf/broker.conf -n dev-study:9876 autoCreateTopicEnable=true &  count=0while [ $count -le 10 ]; doif tail -100 nohup.out | grep "broker.*success"; thenecho "rocketmq broker has been started successfully";breakelsecount=$((count+1))sleep 2fidone
fi# 启动rocketmq dashboard
cd ${ROCKETMQ_HOME}/dashboard
if jps -ml | grep "rocketmq-dashboard"; thenecho "rocketmq dashboard is running.";
elseecho "rocketmq dashboard is Starting ...";rm -rf nohup.out;nohup java -jar rocketmq-dashboard-1.0.0.jar & count=0while [ $count -le 10 ]; doif tail -100 nohup.out | grep "Tomcat started on port(s)"; thenecho "rocketmq dashboard has been started successfully";breakelsecount=$((count+1))sleep 2fidone
fiecho "All services started.";