Redis自动部署脚本编写

#!/bin/bash

ck_ok()
{
   if [ $? -ne 0 ]
   then
       echo "$1 error."
       exit 1
   fi
}

download_redis()
{
   cd /usr/local/src
   if [ -f redis-7.0.4.tar.gz ]
   then
       echo "当前目录已经存在redis-7.0.4.tar.gz"
       echo "检测MD5"
       file_md5=`md5sum redis-7.0.4.tar.gz | awk '{print $1}'`
       if [ ${file_md5} == '3a2ce76ef8f5ca3cc6463c487f2d532c' ]
       then
           return 0
       else
           echo "file redis-7.0.4.tar.gz md5 check failed"
           /bin/mv redis-7.0.4.tar.gz redis-7.0.4.tar.gz.old
       fi
   fi
   sudo curl -o redis-7.0.4.tar.gz https://codeload.github.com/redis/redis/tar.gz/refs/tags/7.0.4
   ck_ok " 下载redis"
}

install_redis()
{
   cd /usr/local/src
   if [ -d redis-7.0.4/ ]
   then
       rm -rf redis-7.0.4/
   fi

   sudo tar zxf redis-7.0.4.tar.gz
   ck_ok "解压redis源码包"
   cd redis-7.0.4/
   sudo make && sudo make PREFIX=/usr/local/redis install
   ck_ok "编译和安装redis"

   sudo mkdir -p /usr/local/redis/{conf,log}
   sudo mkdir -p /data/redis
   if id redis &>/dev/null
   then
       echo "系统已经创建了redis用户，跳过创建"
   else
       echo "创建redis用户"
       sudo useradd -s /sbin/nologin redis
   fi
   ck_ok "创建redis用户"
   sudo chown -R redis /data/redis /usr/local/redis/log
}

config_redis()
{
   echo "配置redis.conf"
   sudo /bin/cp /usr/local/src/redis-7.0.4/redis.conf /usr/local/redis/conf/redis.conf
   sudo sed -i 's/daemonize no/daemonize yes/' /usr/local/redis/conf/redis.conf
   sudo sed -i 's@logfile ""@logfile "/usr/local/redis/log/redis.log"@' /usr/local/redis/conf/redis.conf
   sudo sed -i 's@dir ./@dir /data/redis@' /usr/local/redis/conf/redis.conf
   sudo sed -i 's@pidfile /var/run/redis_6379.pid@pidfile /usr/local/redis/log/redis_6379.pid@' /usr/local/redis/conf/redis.conf
   sudo sed -i '/# requirepass foobared/a requirepass aminglinux.Com' /usr/local/redis/conf/redis.conf

   echo "配置systemd service"
   cat >/lib/systemd/system/redis.service <<EOF
[Unit]
Description=redis
After=network.target
[Service]
User=redis
Type=forking
TimeoutSec=0
PIDFile=/usr/local/redis/log/redis_6379.pid
ExecStart=/usr/local/redis/bin/redis-server /usr/local/redis/conf/redis.conf
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s QUIT $MAINPID
PrivateTmp=true
[Install]
WantedBy=multi-user.target
EOF
   sudo mv /tmp/redis.service /lib/systemd/system/redis.service

   echo "更新内核"
   grep -q 'net.core.somaxconn = 2048' /etc/sysctl.conf || echo "net.core.somaxconn = 2048" || sudo tee -a /etc/sysctl.conf
   grep -q 'vm.overcommit_memory = 1' /etc/sysctl.conf || echo "vm.overcommit_memory = 1" || sudo tee -a /etc/sysctl.conf
   sudo sysctl -p
   sudo systemctl daemon-reload
   sudo systemctl enable redis
   echo "启动redis服务"
   sudo systemctl start redis
   ck_ok "启动redis服务"
}