更新前，内核版本为：
uname -r
3.10.0-327.10.1.el7.x86_64
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升级的方法：
1、导入key
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
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2、安装elrepo的yum源
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
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3、安装内核
yum --enablerepo=elrepo-kernel install kernel-ml-devel kernel-ml
当前为4.4.4:
==================================================================================
Package 架构 版本 源 大小
==================================================================================
正在安装:
kernel-ml x86_64 4.4.4-1.el7.elrepo elrepo-kernel 38 M
kernel-ml-devel x86_64 4.4.4-1.el7.elrepo elrepo-kernel 10 M
4、查看默认启动顺序
awk -F\' '$1=="menuentry " {print $2}' /etc/grub2.cfg
CentOS Linux (4.4.4-1.el7.elrepo.x86_64) 7 (Core)
CentOS Linux (3.10.0-327.10.1.el7.x86_64) 7 (Core)
CentOS Linux (0-rescue-c52097a1078c403da03b8eddeac5080b) 7 (Core)
默认启动的顺序是从0开始，新内核是从头插入（目前位置在0，而4.4.4的是在1），所以需要选择0。
grub2-set-default 0
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然后reboot重启，使用新的内核，下面是重启后使用的内核版本:
uname -r
4.4.4-1.el7.elrepo.x86_64
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5、删除旧的内核
yum remove kernel
chown -R apache:apache
3.修改MySQL配置文件
修改mysql配置文件my.cnf（windows为my.ini）
my.cnf一般在etc/mysql/my.cnf位置。找到后请在以下三部分里添加如下内容：
[client]
default-character-set = utf8mb4
[mysql]
default-character-set = utf8mb4
[mysqld]
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
init_connect='SET NAMES utf8mb4'
4. 重启数据库，检查变量
SHOW VARIABLES WHERE Variable_name LIKE 'character_set_%' OR Variable_name LIKE 'collation%';
SHOW VARIABLES WHERE Variable_name LIKE 'character_set_%' OR Variable_name LIKE 'collation%';
yum install wget ntpdate -y
[root@localhost ~]# ntpdate pool.ntp.org
14 Feb 09:01:01 ntpdate[2476]: step time server 85.199.214.101 offset 942934.062841 sec
[root@localhost ~]# date
Tue Feb 14 09:01:07 CST 2017
创建文件：vi /etc/yum.repos.d/MariaDB.repo
文件内容：
# MariaDB 10.0 CentOS repository list - created 2014-09-28 09:10 UTC
# http://mariadb.org/mariadb/repositories/
[mariadb]name = MariaDBbaseurl = http://yum.mariadb.org/10.0/centos7-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1
yum install -y httpd mariadb-server mariadb php php-gd php-mysql php-ldap php-snmp php-posix php-mbstring net-snmp net-snmp-utils
yum install -y zlib libpng freetype libjpeg fontconfig gd libxml2
yum install -y rrdtool
1.查看ip
ip addr
2. 临时关闭 selinux
setenforce 0
3. 查看selinux状态
sestatus
4. 关闭selinux
cat /etc/selinux/config
systemctl disable firewalld
[root@localhost conf]# systemctl stop firewalld
[root@localhost conf]# setenforce 0
setenforce: SELinux is disabled
SELINUX= enforcing改为disabled
sed -i '/SELINUX/s/enforcing/disabled/' /etc/selinux/config
systemctl enable snmpd.service
systemctl start snmpd.service
systemctl enable httpd.service
systemctl start httpd.service
systemctl enable mariadb.service
systemctl start mariadb.service
yum install vixie-cron
echo '*/5 * * * * root /usr/bin/php /var/www/html/poller.php' >> /etc/crontab
vi /etc/httpd/conf/httpd.conf
/ServerName修改为localhost:80
#ServerName www.example.com:80
--ServerName localhost:80
vi /etc/php.ini
/timezone
[Date]
; Defines the default timezone used by the date functions
; http://php.net/date.timezone
;date.timezone =
date.timezone = Asia/Shanghai
copy cacti.tar -> /var/www/html/
[root@localhost html]# tar zxvf cacti-1.0.2.tar.gz
[root@localhost html]# mv cacti-1.0.2/* .
[root@localhost html]# chown -R apache:apache *
[root@localhost html]# chmod -R 777 rra/ log/
[root@localhost html]# rm -rf cacti-1.0.2/
[root@localhost html]# mysql -u root -p
MariaDB [mysql]> grant all privileges on *.* to 'root'@'109.130.91.41' identified by '!wangqiang25' with grant option;
Query OK, 0 rows affected (0.01 sec)
MariaDB [mysql]> flush privileges;
Query OK, 0 rows affected (0.01 sec)
mysql -u root -p
create database cacti;
grant all on cacti.* to 'cactiuser'@'%' identified by 'cactipwd123';
flush privileges;
mysql -u root -p cacti < cacti.sql
原始目录/etc/my.cnf.d/server.cnf
/etc/my.cnf
[mysqld]
character-set-client-handshake = FALSE
character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
init_connect= 'SET NAMES utf8mb4'
# cacti_setting_20170213
innodb_buffer_pool_size = 4000M
innodb_doublewrite=OFF
innodb_additional_mem_pool_size=160M
innodb_flush_log_at_timeout=3
innodb_read_io_threads=32
innodb_write_io_threads=16
join_buffer_size=256M
tmp_table_size=256M
max_allowed_packet=16M
max_heap_table_size=512M
[client]
default-character-set=utf8mb4
[mysql]
default-character-set=utf8mb4
systemctl restart mariadb.service
/var/www/html/include/config.php
$database_type = 'mysql';
$database_default = 'cacti';
$database_hostname = 'localhost';
$database_username = 'cactiuser';
$database_password = 'cactiuser';
$database_password = 'cactipwd123';
$database_port = '3306';
$database_ssl = false;
$url_path = '/';
ALTER DATABASE `cacti` COLLATE 'utf8mb4_unicode_ci';
删除多余的用户账户
mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root -p mysql
并给time_zone_name放开cactiuser show权限
测试
"/etc/snmp/snmpd.conf
# group context sec.model sec.level prefix read write notif
access notConfigGroup "" any noauth exact all none none
## incl/excl subtree mask
view all included .1 80
安装spine
[root@localhost html]# cd /opt
You have new mail in /var/spool/mail/root
[root@localhost opt]# ls
cacti-spine-1.0.2.tar.gz
[root@localhost opt]# ll
total 784
-rw-r--r--. 1 root root 800868 Feb 14 11:48 cacti-spine-1.0.2.tar.gz
[root@localhost opt]# tar zxvf cacti-spine-1.0.2.tar.gz
yum install gcc net-snmp-devel mariadb-devel openssl-devel automake autoconf libtool make -y
yum install help2man -y
[root@localhost cacti-spine-1.0.2]# ./configure --build=x86_64-unknown-linux
make
make install
安装路径 /usr/local/spine/bin/spine
配置文件存放路径/usr/local/spine/etc
[root@localhost cacti-spine-1.0.2]# cp /usr/local/spine/bin/spine /usr/bin/spine 把执行文件拷贝到/usr/bin/目录下
You have new mail in /var/spool/mail/root
[root@localhost cacti-spine-1.0.2]# chmod +x /usr/bin/spine
[root@localhost cacti-spine-1.0.2]# cp /usr/local/spine/etc/spine.conf.dist /etc/spine.conf
vi /etc/spine.conf
DB_Host localhost
DB_Database cacti
DB_User cactiuser
DB_Pass cactipwd123
DB_Port 3306
安装插件
cd /var/www/html/plugins/
wget http://*****
mv plugin\:插件名称.tgz
tar zxvf 插件名称.tgz
chown -R apache:apache 插件文件夹