為什么 bash 腳本，必須創建並運行 zabbix 服務器，執行沒有錯誤，但結果是錯誤的？

Question

每個人。 我ve started to learn bash and DevOps, lost 2 days, but I can理解以下內容：要求

• Centos 7
• DB mysql
• zabbix服務器版本4
• mariadb

我需要編寫 bash 腳本（問題末尾的腳本），它創建並運行 zabbix 服務器（正好是 4 版本）。 當我以兩種方式逐步手動運行腳本（手動在 pwsh 中插入每個命令）以創建數據庫（示例 1 或示例 2）時 - 它正確執行：創建 zabbix db，啟動所有服務，zabbix 前端運行良好。 但是當我以 root 用戶身份或通過命令以本地用戶身份運行腳本時：

>sh -c /home/zabbix_server

腳本完成：

>Created symlink from /etc/systemd/system/multi-user.target.wants/zabbix-server.service to /usr/lib/systemd/system/zabbix-server.service.
>Created symlink from /etc/systemd/system/multi-user.target.wants/zabbix-agent.service to /usr/lib/systemd/system/zabbix-agent.service.
>Created symlink from /etc/systemd/system/multi-user.target.wants/httpd.service to /usr/lib/systemd/system/httpd.service.

在腳本期間或腳本結束時沒有錯誤消息，但是當我嘗試手動執行命令 create db（example1 或 example2）時，沒關系：

#Create DB (example1)
mysql -uroot <<EOF
create database zabbix character set utf8 collate utf8_bin;
create user 'zabbix'@'localhost' identified by 'zabbix';
grant all privileges on zabbix.* to 'zabbix'@'localhost';
EOF
#Create DB (example2)
mysql -u root -e "CREATE DATABASE zabbix; CREATE USER zabbix@localhost identified by 'zabbix'; GRANT ALL ON zabbix.* to zabbix@localhost WITH GRANT OPTION;"

我收到錯誤消息： ... db can't be created, zabbix base exists 但是命令的結果：

>show databases;

在 db 列表中不顯示 db zabbix。

腳本

#!/usr/bin/env bash
setenforce 0
#Install the repository configuration package
rpm -Uvh https://repo.zabbix.com/zabbix/4.4/rhel/7/x86_64/zabbix-release-4.4-1.el7.noarch.rpm
yum clean all
#Install Zabbix server, frontend, agent, database
yum install zabbix-server-mysql -y
yum install zabbix-web-mysql -y
yum install zabbix-agent -y
yum install mariadb-server -y
#Start DB
systemctl start mariadb
#Create DB (example1)
mysql -uroot <<EOF
create database zabbix character set utf8 collate utf8_bin;
create user 'zabbix'@'localhost' identified by 'zabbix';
grant all privileges on zabbix.* to 'zabbix'@'localhost';
EOF
#Create DB (example2)
mysql -u root -e "CREATE DATABASE zabbix; CREATE USER zabbix@localhost identified by 'zabbix'; GRANT ALL ON zabbix.* to zabbix@localhost WITH GRANT OPTION;"
#Import initial schema and data
zcat /usr/share/doc/zabbix-server-mysql*/create.sql.gz | mysql zabbix
#Configure the database for Zabbix server
echo DBPassword=zabbix >> /etc/zabbix/zabbix_server.conf
#Start zabbix server
systemctl start zabbix-server
#Configure frontend
sed -i 's:# php_value date.timezone.*:php_value date.timezone Europe\/Minsk:g' /etc/httpd/conf.d/zabbix.conf;
#Start httpd
systemctl restart zabbix-server zabbix-agent httpd
#Make Zabbix server and agent processes start at system boot
systemctl enable zabbix-server zabbix-agent httpd

Answer 1

根據您想要實現的目標，這可能是一個很好的建議：

CREATE DATABASE IF NOT EXISTS zabbix;

這使得調用是冪等的！

Answer 2

問題是，該腳本在末尾 (0d) 包含一個 \r (CR)。 刪除它：

tr -d '\r' < old_name_script > new_name_script

並且腳本運行良好。 如果它有用，有一個完整的腳本示例，它創建了 zabbix 服務器：

#!/usr/bin/env bash
#Disable SELinux
enforceStatus=getenforse
if [ "$enforceStatus" != "Permissive" ]; then
setenforce 0
fi
#Install the repository configuration package
rpm -Uvh https://repo.zabbix.com/zabbix/4.0/rhel/7/x86_64/zabbix-release-4.0-2.el7.noarch.rpm
yum clean all
#Install Zabbix server, frontend, agent, database, httpd
yum install zabbix-server-mysql -y
yum install zabbix-web-mysql -y
yum install zabbix-agent -y
yum install mariadb mariadb-server -y
yum install httpd -y
#Start and add to autostart DB mariadb
systemctl start mariadb
systemctl enable mariadb.service
#Create DB (example1)
mysql -uroot <<EOF
create database zabbix character set utf8 collate utf8_bin;
create user 'zabbix'@'localhost' identified by 'zabbix';
grant all privileges on zabbix.* to 'zabbix'@'localhost';
EOF
#Import initial schema and data
zcat /usr/share/doc/zabbix-server-mysql*/create.sql.gz | mysql zabbix
#Configure the database for Zabbix server
echo DBPassword=zabbix >> /etc/zabbix/zabbix_server.conf
#Configure frontend 
sed -i 's:# php_value date.timezone.*:php_value date.timezone Europe\/Minsk:g' /etc/httpd/conf.d/zabbix.conf;
#Start zabbix server processes start at system boot
systemctl restart zabbix-server
systemctl enable zabbix-server
#Start httpd processes start at system boot
systemctl restart httpd
systemctl enable httpd
#Start zabbix-agent processes start at system boot
systemctl restart zabbix-agent
systemctl enable zabbix-agent
#Add permissions to irewall
firewall-cmd --permanent --add-port=10050/tcp
firewall-cmd --permanent --add-port=10051/tcp
firewall-cmd --permanent --add-port=80/tcp
firewall-cmd --reload