生产实践：
使用shell针对服务进行个性化配置
学习技巧：
Shell 判断、循环、function，配置crontab、rsync、系统内核参数
脚本内容：
使用shell脚本在业务初始化时执行服务个性化配置，提高机器快速扩容效率。
#!/bin/bash
# author: anzhihe 2020-03-25
# mail: anzhihe@chegva.com
set -x
hostname=`hostname`
baseurl=""
# select baseurl
function select_baseurl() {
if [[ $hostname == *dictchunk* ]] ; then
baseurl="https://git.chegva.com/anzhihe/rt-init/raw/master/dict-chunk"
elif [[ $hostname == *public-rtchunk* ]] ; then
baseurl="https://git.chegva.com/anzhihe/rt-init/raw/master/pub-rt-chunk"
elif [[ $hostname == *gs-rtchunk* ]]; then
baseurl="https://git.chegva.com/anzhihe/rt-init/raw/master/rt-chunk"
else
echo "无需baseurl配置，请忽略！"
fi
}
# add network rto
function add_rto() {
gateway=`ip r |grep default|awk '{print $3}'`
if [ -z $gateway ];then
echo "gateway is null"
exit 1
fi
localIP=`hostname |xargs host |awk '{print $NF}'`
if [[ $localIP == 100\.69* || $localIP == 100\.70* || $localIP == 100\.89* || $localIP == 100\.90* ]];then
echo "gz ip: $localIP"
ip r add 100.69.0.0/16 via $gateway rto_min 50ms
ip r add 100.70.0.0/16 via $gateway rto_min 50ms
ip r add 100.89.64.0/18 via $gateway rto_min 50ms
ip r add 100.90.0.0/16 via $gateway rto_min 50ms
if [[ $? -eq 0 ]];then
echo "ip r add 100.69.0.0/16 via $gateway rto_min 50ms" >> /etc/rc.local
echo "ip r add 100.70.0.0/16 via $gateway rto_min 50ms" >> /etc/rc.local
echo "ip r add 100.89.64.0/18 via $gateway rto_min 50ms" >> /etc/rc.local
echo "ip r add 100.90.0.0/16 via $gateway rto_min 50ms" >> /etc/rc.local
fi
elif [[ $localIP == 10\.88* || $localIP == 10\.89* || $localIP == 10\.90* ]];then
echo "bj ip: $localIP"
ip r add 10.88.0.0/16 via $gateway rto_min 50ms
ip r add 10.89.0.0/16 via $gateway rto_min 50ms
ip r add 10.90.0.0/16 via $gateway rto_min 50ms
if [[ $? -eq 0 ]];then
echo "ip r add 10.88.0.0/16 via $gateway rto_min 50ms" >> /etc/rc.local
echo "ip r add 10.89.0.0/16 via $gateway rto_min 50ms" >> /etc/rc.local
echo "ip r add 10.90.0.0/16 via $gateway rto_min 50ms" >> /etc/rc.local
fi
elif [[ $localIP == 10\.85* || $localIP == 10\.86* || $localIP == 10\.87* ]];then
echo "sh ip: $localIP"
ip r add 10.85.0.0/16 via $gateway rto_min 50ms
ip r add 10.86.0.0/16 via $gateway rto_min 50ms
ip r add 10.87.0.0/16 via $gateway rto_min 50ms
if [[ $? -eq 0 ]];then
echo "ip r add 10.85.0.0/16 via $gateway rto_min 50ms" >> /etc/rc.local
echo "ip r add 10.86.0.0/16 via $gateway rto_min 50ms" >> /etc/rc.local
echo "ip r add 10.87.0.0/16 via $gateway rto_min 50ms" >> /etc/rc.local
fi
else
echo "not bj or gz sh ip, exit"
exit 0
fi
}
# add kernel para
function add_kernel_para() {
## 关闭coredump
sysctl -w kernel.core_pattern="|/bin/false"
echo "kernel.core_pattern = |/bin/false" >> /etc/sysctl.conf
## 备份sysctl.conf
cp /etc/sysctl.conf /tmp/sysctl.conf.bak
#hostname=`hostname`
if [[ $hostname == *\.docker ]] ; then
echo "docker机器跳过"
exit 1
fi
# if [[ $hostname == *\.us01 ]] ; then
# echo "美东机器跳过"
# exit 1
# fi
ncs="net.core.somaxconn"
sysctl -w ${ncs}=4096
if grep -o "${ncs}" /etc/sysctl.conf > /dev/null
then
oldvalue=$(grep ${ncs} /etc/sysctl.conf|tail -1 | awk -F "=| " '{ print $NF }')
if [ $oldvalue -ne 4096 ]
then
sed -i "s|\("${ncs}" *= *\).*|\14096|" /etc/sysctl.conf
else
echo "${ncs} 无需改动"
fi
else
echo "新加vm配置"
echo "${ncs} = 4096" >> /etc/sysctl.conf
fi
nitmsb="net.ipv4.tcp_max_syn_backlog"
sysctl -w ${nitmsb}=4096
if grep -o "$nitmsb" /etc/sysctl.conf > /dev/null
then
oldvalue=$(grep ${nitmsb} /etc/sysctl.conf|tail -1 | awk -F "=| " '{ print $NF }')
if [ $oldvalue -ne 4096 ]
then
sed -i "s|\("${nitmsb}" *= *\).*|\14096|" /etc/sysctl.conf
else
echo "${nitmsb} 无需改动"
fi
else
echo "新加vm配置"
echo "${nitmsb} = 4096" >> /etc/sysctl.conf
fi
}
# add system crontab
function add_cron() {
if [[ $hostname == *dictchunk* ]] ; then
if grep -q "archive_trp_clean.sh" /var/spool/cron/anzhihe; then
echo "archive_trp_clean定时任务已经添加！"
else
echo "00 04 * * * cd /home/anzhihe/DDict/dict-chunk/ && bash archive_trp_clean.sh" >> /var/spool/cron/anzhihe
echo "添加ddict crontab完成"
fi
elif [[ $hostname == *public-rtchunk* || $hostname == *gs-rtchunk* ]] ; then
curl -sq $baseurl/clear_unitdb_log.sh -w "\n" > /home/anzhihe/opbin/clear_unitdb_log.sh
chown anzhihe.anzhihe /home/anzhihe/opbin/clear_unitdb_log.sh
chmod 744 /home/anzhihe/opbin/clear_unitdb_log.sh
if grep -q "clear_unitdb_log.sh" /var/spool/cron/anzhihe; then
echo "clear_unitdb_log定时任务已经添加！"
else
echo "*/5 * * * * cd /home/anzhihe/opbin;./clear_unitdb_log.sh >> clear_unitdb_log 2>&1" >> /var/spool/cron/anzhihe
echo "添加rt crontab完成"
fi
else
echo "no cron need to add "
fi
}
# add rsyncd config
function add_rsyncd_config() {
curl -sq $baseurl/rsyncd.password -w "\n" > /etc/rsyncd.password
curl -sq $baseurl/rsync.password -w "\n" > /etc/rsync.password
chmod 600 /etc/rsyncd.password /etc/rsync.password
chown root.root /etc/rsyncd.password
chown anzhihe.anzhihe /etc/rsync.password
if [[ $hostname == *\.gz01 ]] ; then
idc="gz"
elif [[ $hostname == *\.ys || $hostname == *\.py02 ]] ; then
idc="sh"
elif [[ $hostname == *\.us01 || $hostname == *\.ru01 ]]; then
idc="us01"
# 配置us01 ntp
#cp -f /etc/ntp.conf /etc/ntp.conf.bak-`date +%Y%m%d`
#cp -f /usr/local/sys/configure/all_etc/ntp_md.conf /etc/ntp.conf
#systemctl restart ntpd
else
echo "机器不在合理机房"
exit 1
fi
if [ `ps -elf|grep -v grep |grep -c /usr/bin/rsync` -lt 1 ]; then
curl -sq $baseurl/${idc}.rsyncd.conf -w "\n" > /etc/rsyncd.conf
/usr/bin/rsync --daemon && echo "rsync已启动。"
echo "/usr/bin/rsync --daemon" >> /etc/rc.d/rc.local
# else
# curl -sq $baseurl/${idc}.rsyncd-append.conf -w "\n" >> /etc/rsyncd.conf
fi
echo "添加rsync配置完成..."
}
function main() {
if [[ $hostname == *chunk* ]]; then
select_baseurl
add_kernel_para
add_cron
add_rsyncd_config
else
echo "非存储机器略过..."
exit 0
fi
}
mainBash
