## 2（50分）在題目1基礎上完成負載均衡及高可用的搭建并測試。搭建全網備份服務器備份所有的配置文件和數據庫的數據及存儲的數據。給出操作步驟
### 負載均衡配置 lb01(10.0.0.5),lb02(10.0.0.6)上配置
#### 安裝nginx與web服務器上安裝方式相同
#### 配置nginx，用它做負載均衡
~~~
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
upstream server_pools {
server 10.0.0.7:80 weight=1;
server 10.0.0.8:80 weight=1;
}
server {
listen 80;
server_name bbs.etiantian.org;
location / {
proxy_pass http://server_pools;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
}
}
server {
listen 80;
server_name www.etiantian.org;
location / {
proxy_pass http://server_pools;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
}
}
server {
listen 80;
server_name blog.etiantian.org;
location / {
proxy_pass http://server_pools;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
}
}
}
~~~
### keepalived 高可用 lb01(10.0.0.5),lb02(10.0.0.6)上配置
#### 安裝并啟動 keepalived
~~~
yum install keepalived -y
/etc/init.d/keepalived start
mkdir /server/scripts/ -p
cat >/server/scripts/check_lb.sh<<EOF
#!/bin/bash
if [ `ps -ef |grep nginx|grep -v grep` -eq 0 ];then
/etc/init.d/keepalived stop
fi
EOF
chmod +x /server/scripts/check_lb.sh
~~~
#### lb01配置文件
~~~
cat > /etc/keepalived/keepalived.conf<<EOF
global_defs {
router_id LB01
}
vrrp_script chekc_lb{
script "/server/scripts/chekc_lb.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.3/24 dev eth0 label eth0:1
}
track_script{
check_lb
}
}
EOF
~~~
#### lb02配置文件
~~~
cat > /etc/keepalived/keepalived.conf<<EOF
global_defs {
router_id LB02
}
vrrp_script chekc_lb{
script "/server/scripts/chekc_lb.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.0.0.3/24 dev eth0 label eth0:1
}
track_script{
check_lb
}
}
EOF
~~~
### 數據庫備份
~~~
# 格式：mysqldump -h鏈接ip -P(大寫)端口 -u用戶名 -p密碼數據庫名>d:XX.sql(路勁)
/server/scripts/database_backup.sh
#!/bin/ash
mkdir /database_bak -p
$Time=$(date +%F)
mysqldump -h172.16.1.51 -uroot -poldboy123 dedecms > /database_bak/dedecms_${Time}.sql;
mysqldump -h172.16.1.51 -uroot -poldboy123 discuz > /database_bak/discuz_${Time}.sql;
mysqldump -h172.16.1.51 -uroot -poldboy123 wordpress > /database_bak/wordpress_${Time}.sql;
定時任務
00 00 * * * /bin/sh /server/scripts/database_backup.sh >/dev/null 2>&1
~~~
### 全網備份
~~~
安裝配置rsync
yum install rsync -y
echo "123456" >/etc/rsync.password
chmod 600 /etc/rsync.password
備份腳本
cat /server/scripts/backup.sh
#!/bin/bash
Ip=$(ifconfig eth1|awk -F "[ :]+" 'NR==2 {print $4}')
Path=/backup
User=rsync_backup
Backup_server=172.16.1.41
Module=backup
Password_file=/etc/rsync.password
if [ $(date +%w) -eq 0 ]; then
Time=$(date +%F_%w)
else
Time=$(date +%F)
fi
BackupPath=$Path/$Ip
if [ ! -d $BackupPath ];then
mkdir $BackupPath -p
fi
cd / &&\
tar zcfh $BackupPath/backup_$Time.tar.gz etc apps/nginx/html var/spool/cron/root database_bak &&\
md5sum $BackupPath/backup_$Time.tar.gz >$BackupPath/flag_$Time.log &&\
rsync -az $Path/ $User@${Backup_server}::${Module} --password-file=${Password_file} &&\
find /backup/ -type f -mtime +30 \( -name "*.log" -o -name "*.tar.gz" \) | xargs rm -f
定時任務
# 定時備份 by Z
00 02 * * * /bin/sh /server/scripts/backup.sh >/dev/null 2>&1
檢查備份腳本
cat /server/scripts/check_backup.sh
#!/bin/bash
IP=$(ifconfig eth1|awk -F "[:]+" 'NR==2{print $4}')
Path=/backup
if [ $(date +%w) -eq 0 ]
then
Time=$(date +%F_%w)
else
Time=$(date +%F)
fi
find /backup -type f -name "*flag*${Time}*.log" |xargs md5sum -c >> ${Path}/${Time}_result.log
mail -s "${Time} backup result" 207150680@qq.com < ${Path}/${Time}_result.log
find /backup/ -type f -mtime +180 -regextype 'posix-extended' ! -regex '.*_0.(tar.gz|log)' | xargs rm -f
定時任務
00 05 * * * /bin/sh /server/scripts/check_backup.sh >/dev/null 2>&1
~~~
