zabbix4.0安装文档
导入yum源：rpm -Uvh https://repo.zabbix.com/zabbix/4.0/rhel/7/x86_64/zabbix-release-4.0-2.el7.noarch.rpm
清除yum缓存：yum clean all
更换yum源：vim /etc/yum.repos.d/zabbix.repo
清华源：https://mirrors.tuna.tsinghua.edu.cn/zabbix
gpgcheck=0
安装zabbix：yum -y install zabbix-server-mysql zabbix-web-mysql zabbix-agent
安装数据库：yum install mariadb-server
启动数据库：systemctl start mariadb.service
设置开机自启：systemctl enable mariadb.service
优化数据库：mysql_secure_installation
Set root password? [Y/n] n
Remove anonymous users? [Y/n] y
Disallow root login remotely? [Y/n] y
Remove test database and access to it? [Y/n] y
Reload privilege tables now? [Y/n] y
建库：create database zabbix character set utf8 collate utf8_bin;
授权：grant all privileges on zabbix.* to zabbix@localhost identified by ‘password’;
导入数据结构：zcat /usr/share/doc/zabbix-server-mysql*/create.sql.gz | mysql -uzabbix -p zabbix
修改配置文件：vim /etc/zabbix/zabbix_server.conf
DBHost=localhost
DBName=zabbix
DBUser=zabbix
DBPassword=123456
启动：systemctl start zabbix-server
开机自启：systemctl enable zabbix-server
启动Web:systemctl start httpd
开机自启：systemctl enable httpd
修改时区：vim /etc/httpd/conf.d/zabbix.conf
php_value date.timezone Asia/Shanghai
默认账户密码：Admin zabbix
zabbix_get -s 127.0.0.1 -k vda_tps
常用监控命令：
free -m
df -hT
df -hi
top
htop
uptime
iftop
iostat
iotop
vmstat
netstat
拾遗：
批量创建空文件 touch {1..10000}
wget 断点续传 -c 限速下载 –limit-rate=300k
根据命令查包：yum provides iostat
grep -c 计数
压力测试：ab -n 300000 -c 300 http://10.1.24.251/zabbix/index.php
获取剩余内存：free -m| awk ‘NR==2{print $NF}’
查找安装记录：yum history info 12
触发器表达式
{Zabbix server:system.users.num.last()}>3
{主机名:key名称.函数()}表达式
邮箱授权码：jhjpffgnyulbbcig
脚本位置：AlertScriptsPath=/usr/lib/zabbix/alertscripts
变量：{ALERT.SENDTO} {ALERT.SUBJECT} {ALERT.MESSAGE}
zabbix远程执行命令配置：EnableRemoteCommands=1 AllowRoot=1
乱码处理；/usr/share/zabbix/assets/fonts/graphfont.ttf
grafana安装：
wget https://mirrors.tuna.tsinghua.edu.cn/grafana/yum/rpm/grafana-6.4.3-1.x86_64.rpm
yum localinstall grafana-6.4.3-1.x86_64.rpm -y
systemctl start grafana-server
1.安装zabbix插件
查找插件：grafana-cli plugins list-remote| grep zabbix
安装：grafana-cli plugins install alexanderzobnin-zabbix-app
2.新建一个zabbix数据源
3.导入dashboard模板
dos: denied of service,防御：iptables 封IP；
ddos: 分布式dos攻击；高防IP,
优化TCP三次握手timewait: /etc/sysctl.conf
netstat -nat| grep -c ‘ESTABLISHED’
