详解Shell脚本控制docker容器启动顺序

#!/bin/bash
#chkconfig: 2345 80 90
#description:autoStartMaintenanceService.sh
#
#前提:
#1.docker必须能开机自启
#2.docker能够正常启动运维服务
#3.此脚本须运行微服务所在的机器上
#
##需要修改的配置-----开始
##数据库所在的机器IP
DATABASE_HOST=192.169.1.52
##数据库监听的端口
DATABASE_PORT=3306
##微服务所在机器IP
LOCAL_HOST=192.169.1.46
##微服务访问端口
Maintenance_Port=8180
##NACOS所在机器的ip
NACOS_HOST=192.169.1.82
##NACOS的监听端口
NACOS_PORT=8848
##微服务容器名称(NAMES列)
Maintenance_Container_Name="umc-maintenance"
##该脚本生成的日志路径
Log_Path=/home/test/log
##需要修改的配置-----结束
##
##循环延时时间(s)秒
LOOP_TIME=5
at_time=""
at_date=""

getAtTime() {
 at_time="$(date +%Y-%m-%d-%H:%M:%S) --- "
 at_date=$(date +%Y-%m-%d)
}

autoStartWebService() {
 ##如果日志路径不存在则创建
 if [ ! -d "$Log_Path" ]; then
  mkdir -p $Log_Path
 fi

 while true; do
  ##判断数据库是否启动
  req_message=$(nc -w 1 ${DATABASE_HOST} ${DATABASE_PORT} </dev/null && echo "200")
  if [ -n "$req_message" ]; then
   getAtTime
   echo "$at_time Database is running" >>${Log_Path}/"$at_date"_autoStartMaintenanceService.log
   waitNacosStarting
  else
   getAtTime
   echo "$at_time Database is not running and please wait for Database starting" >>${Log_Path}/"$at_date"_autoStartMaintenanceService.log
   sleep $LOOP_TIME
  fi
 done
}
##判断Nacos是否启动
waitNacosStarting() {
 req_message=$(nc -w 1 ${NACOS_HOST} ${NACOS_PORT} </dev/null && echo "200")
 if test $((req_message)) -eq 200; then
  getAtTime
  echo "$at_time Nacos is running" >>${Log_Path}/"$at_date"_autoStartMaintenanceService.log
  startMaintenanceService
  sleep $LOOP_TIME
 else
  getAtTime
  echo "$at_time Nacos is not running and please wait for nacos starting" >>${Log_Path}/"$at_date"_autoStartMaintenanceService.log
  sleep $LOOP_TIME
 fi
}

##启动微服务
startMaintenanceService() {
 req_message=$(nc -w 1 ${LOCAL_HOST} ${Maintenance_Port} </dev/null && echo "200")
 if test $((req_message)) -eq 200; then
  getAtTime
  echo "$at_time Maintenance service is running" >>${Log_Path}/"$at_date"_autoStartMaintenanceService.log
 else
  container_id=$(docker ps -a | grep $Maintenance_Container_Name | grep -v grep | awk '{print $1}')
  getAtTime
  echo "$at_time Maintenance service container id is ${container_id}" >>${Log_Path}/"$at_date"_autoStartMaintenanceService.log
  docker start ${container_id}
 fi

}

autoStartWebService

command > file 2>&1
或者
command >> file 2>&1