解读先电2.4版iaas-install-mysql.sh脚本

#!/bin/bash			#声明解释器路径source /etc/xiandian/openrc.sh	#生效环境变量 

ping $HOST_IP -c 4 >> /dev/null 2>&1if [ 0  -ne  $? ]; then        echo -e "\033[31m Warning\nPlease make sure the network configuration is correct!\033[0m"        exit 1fi#shell语法不做解释，这一部分的作用是确保网络配置正确，错误则输出（Please make sure the network configuration is correct!）并终止执行脚本

#MariaDByum install -y mariadb mariadb-server python2-PyMySQL		#安装MariaDB软件包

sed -i  "/^symbolic-links/a\default-storage-engine = innodb\ninnodb_file_per_table\ncollation-server = utf8_general_ci\ninit-connect = 'SET NAMES utf8'\ncharacter-set-server = utf8\nmax_connections=10000" /etc/my.cnf#修改 /etc/my.cnf文件[mysqld]中添加max_connections=10000  设置 mariadb最大连接数为10000default-storage-engine = innodbinnodb_file_per_table设置数据库默认存储引擎为innodbcollation-server = utf8_general_ciinit-connect = 'SET NAMES utf8'character-set-server = utf8**设置数据库的编码格式为utf8 

sed -i 's/plugin-load-add*/#plugin-load-add/g' /etc/my.cnf.d/auth_gssapi.cnf  #修改/etc/my.cnf.d/auth_gssapi.cnf文件参数[mariadb]注释一行参数#plugin-load-add=auth_gssapi.so

crudini --set /usr/lib/systemd/system/mariadb.service Service LimitNOFILE 10000crudini --set /usr/lib/systemd/system/mariadb.service Service LimitNPROC 10000#由于mariadb有默认打开文件数限制。可以通过修改/usr/lib/systemd/system/mariadb.service文件参数[Service]新添加两行如下参数：LimitNOFILE=10000LimitNPROC=10000来调大打开文件数目。

systemctl daemon-reload			#后台程序重新加载，使配置文件生效生效systemctl enable mariadb.service	#设置开机自启mariadb服务					systemctl restart mariadb.service	#重启mariadb服务					

expect -c "						#自动执行脚本spawn /usr/bin/mysql_secure_installation		#执行安全配置向导命令expect \"Enter current password for root (enter for none):\"send \"\r\"expect \"Set root password?\"send \"y\r\"expect \"New password:\"send \"$DB_PASS\r\"expect \"Re-enter new password:\"send \"$DB_PASS\r\"expect \"Remove anonymous users?\"send \"y\r\"expect \"Disallow root login remotely?\"send \"n\r\"expect \"Remove test database and access to it?\"send \"y\r\"expect \"Reload privilege tables now?\"send \"y\r\"expect eof"#借助expect处理交互的命令，配置Mysql#MariaDB简介：https://blog.csdn.net/cxu0262/article/details/106257174

#RabbitMQyum install rabbitmq-server -y					#安装rabbitmq软件包	systemctl start rabbitmq-server.service				#启动rabbitmq服务		systemctl enable rabbitmq-server.service			#设置rabbitmq服务开机自启rabbitmqctl add_user $RABBIT_USER $RABBIT_PASS			#创建RabbitMQ用户和密码rabbitmqctl set_permissions $RABBIT_USER  ".*" ".*" ".*"	#设置用户访问虚拟机权限：授予用户可访问虚拟主机，在所有资源上都具备可配置，可写及可读的权限。#python-memcached：使用python语言开发的与memcached内存守护进程通信的接口程序#RabbitMQ简介：https://blog.csdn.net/qq_45533841/article/details/106026991

#Memcacheyum install memcached python-memcached -ysed -i  -e 's/OPTIONS.*/OPTIONS="-l 127.0.0.1,::1,'$HOST_NAME'"/g' /etc/sysconfig/memcached	systemctl start memcached.servicesystemctl enable memcached.service#Memcache简介：https://blog.csdn.net/qq_33753147/article/details/79159410

#ETCDyum install etcd -ysed -i -e 's/#ETCD_LISTEN_PEER_URLS.*/ETCD_LISTEN_PEER_URLS="http:\/\/'$HOST_IP':2380"/g' \-e 's/^ETCD_LISTEN_CLIENT_URLS.*/ETCD_LISTEN_CLIENT_URLS="http:\/\/'$HOST_IP':2379"/g' \-e 's/^ETCD_NAME="default"/ETCD_NAME="'$HOST_NAME'"/g' \-e 's/#ETCD_INITIAL_ADVERTISE_PEER_URLS.*/ETCD_INITIAL_ADVERTISE_PEER_URLS="http:\/\/'$HOST_IP':2380"/g' \-e 's/^ETCD_ADVERTISE_CLIENT_URLS.*/ETCD_ADVERTISE_CLIENT_URLS="http:\/\/'$HOST_IP':2379"/g' \-e 's/#ETCD_INITIAL_CLUSTER=.*/ETCD_INITIAL_CLUSTER="'$HOST_NAME'=http:\/\/'$HOST_IP':2380"/g' \-e 's/#ETCD_INITIAL_CLUSTER_TOKEN.*/ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster-01"/g' \-e 's/#ETCD_INITIAL_CLUSTER_STATE.*/ETCD_INITIAL_CLUSTER_STATE="new"/g' /etc/etcd/etcd.conf#修改/etc/etcd/etcd.conf配置文件，添加以下内容：ETCD_LISTEN_PEER_URLS="http://192.168.100.10:2380"ETCD_LISTEN_CLIENT_URLS="http://192.168.100.10:2379"ETCD_NAME="controller"ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.100.10:2380"ETCD_ADVERTISE_CLIENT_URLS="http://192.168.100.10:2379"ETCD_INITIAL_CLUSTER="controller=http://192.168.100.10:2380"ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster-01"ETCD_INITIAL_CLUSTER_STATE="new"#ETCD简介：https://blog.csdn.net/BlademasterDZ/article/details/113561889