開發腳本自動部署及監控
1.編寫腳本自動部署反向代理、web、nfs；
要求： I、部署nginx反向代理三個web服務，調度算法使用加權輪詢；
II、所有web服務使用共享存儲nfs，保證所有web都對其有讀寫權限，保證數據一致性；
編寫的部署腳本有兩個，分別為nginx部署腳本和nfs部署腳本，根據IP檢測要部署到的主機是服務器或者是客戶端，識別出來后，執行不同的安裝配置操作。
a.部署nginx
#!/bin/bash #Deploy_Web to : deploy nginx function Pre_Action(){ yum clean all yum install epel* -y if [ $? -eq 0 ] then echo 'epel_package install right' else echo 'epel_package install ERROR!!!' fi yum clean all yum install nginx -y if [ $? -eq 0 ] then echo 'nginx_package install right' else echo 'nginx_pacage install ERROR' fi } function Close_Wall(){ systemctl stop firewalld #close firewall setenforce 0 #close selinux iptables –L #clear tables systemctl disable firewalld #disable } function Restart_service(){ systemctl start nginx #start nginx if [ $? -eq 0 ] then echo 'nginx_service start!!!' else systemctl restart nginx if [ $? -eq 0 ] then echo 'nginx_service start!!!' else echo 'nginx_servive is not good!!!' fi fi } function Cilent_conf(){ Pre_Action Close_Wall Restart_service } function Server_conf(){ Cilent_conf msg='upstream mserver{ server 192.168.0.115 weight=3;server 192.168.0.116;server 192.168.0.117; }' #訪問web115的權重為3 sed -ri "/^http/a $msg" /etc/nginx/nginx.conf #增加upstream sed -ri "/^ *location \/ \{$/a proxy_pass http://mserver\;" /etc/nginx/nginx.conf #修改localtion systemctl restart nginx #重啟nginx服務 } ipaddr=`ifconfig|awk 'NR==2{print $2}'` echo $ipaddr if [ "$ipaddr" = '192.168.0.114'] then Server_conf else Cilent_conf fib.部署nfs
#!/bin/bash #start nfs_service function nfs_pre(){ yum clean all yum install rpcbind nfs-utils -y if [ $? -eq 0 ] then echo 'nfs_package install right!!!' else echo 'nfs_package install ERROR!!!' exit fi } function Server_conf(){ mkdir /share echo '/share 192.168.0.0/24(rw,sync,fsid=0)' > /etc/exports # head -1 /etc/exports chmod -R 777 /share } function Client_conf(){ # mkdir /data_disk mount -t nfs 192.168.0.118:/share /usr/share/nginx/html if [ $? -eq 0 ] then echo 'mount successful!!!' else echo 'mount failed!!!' exit fi } function nfs_start(){ systemctl enable nfs-server.service systemctl enable rpcbind.service systemctl start rpcbind.service if [ $? -eq 0 ] then echo 'rpcbind start!!!' else systemctl restart rpcbind.service if [ $? -eq 0 ] then echo 'rpcbind_service start!!!' else echo 'rpcbind_servive is not good!!!' fi fi systemctl start nfs-server.service if [ $? -eq 0 ] then echo 'nfs-server start!!!' else systemctl restart nfs-server.service if [ $? -eq 0 ] then echo 'nfs-server start!!!' else echo 'nfs-server is not good!!!' fi fi exportfs } ipaddr=`ifconfig|awk 'NR==2{print $2}'` echo $ipaddr if [ "$ipaddr" = '192.168.0.118' ] then nfs_pre Server_conf nfs_start else nfs_pre nfs_start Client_conf systemctl restart nginx if [ $? -eq 0 ] then echo 'nfs-server restart!!!' else echo 'nfs-server restart fail!!!' fi fic.在部署了一台nginx反向代理服務器，三台web服務器和一台nfs共享存儲服務器后，在共享服務器的/share目錄下創建了文件suc.txt。用瀏覽器訪問nginx反向代理服務器的IP驗證。
2.編寫監控腳本，監控集群內所有服務存活狀態，內存、磁盤剩余率檢測，異常則發送報警郵件
a.要監控的服務有nginx和nfs是否關閉,還監控着內存和磁盤剩余率,其中磁盤剩余分為inode使用情況和內存空間使用情況
b.第三方郵件
[root@ym script]# vim /usr/bin/my_mail具體使用參考 http://www.cnblogs.com/linhaifeng/p/6602149.html#_label7
c.監控腳本如下
#!/bin/bash cpu_limit=50 #cpu使用超過50% mem_limit=50 #內存使用超過50%發送郵件 disk='/dev/sda1' #需要監控的磁盤名 disk_inode_limit=50 #磁盤inode使用 disk_space_limit=50 #磁盤空間使用 function m_nginx(){ ps aux |grep nginx|grep -v grep &> /dev/null if [ $? -eq 0 ] then echo 'nginx is normal' else msg="TIME:$(date +%F_%T) HOSTNAME:$(hostname) IPADDR:$(/usr/sbin/ifconfig|awk 'NR==2{print $2}') MSG:nginx is stop!!!" echo $msg /usr/bin/my_mail $msg fi } function m_nfs(){ ps aux |grep nfs|grep -v grep &> /dev/null if [ $? -eq 0 ] then echo 'nfs is normal' else msg="TIME:$(date +%F_%T) HOSTNAME:$(hostname) IPADDR:$(/usr/sbin/ifconfig|awk 'NR==2{print $2}') MSG:nfs is stop!!!" echo $msg /usr/bin/my_mail $msg fi } function m_mem(){ mem_total=`free |awk 'NR==2{print $2}'` mem_use=`free |awk 'NR==2{print $3}'` mem_per=`echo "scale=2;$mem_use/$mem_total" |bc -l|cut -d. -f2` if [ $mem_per -gt $mem_limit ] then msg="TIME:$(date +%F_%T) HOSTNAME:$(hostname) IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}') MSG:Memory usage exceeds the limit,current value is ${mem_per}%" echo $msg /usr/bin/my_mail $msg fi } function m_disk_inode(){ inode_use=`df -i $disk |awk 'NR==2{print $5}' |cut -d% -f1` if [ $inode_use -gt $disk_inode_limit ] then msg="TIME:$(date +%F_%T) HOSTNAME:$(hostname) IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}') MSG:Disk inode usage exceeds the limit,current value is ${inode_use}%" echo $msg /usr/bin/my_mail $msg fi } function m_disk_space(){ space_use=`df $disk |awk 'NR==2{print $5}'|cut -d% -f1` if [ $space_use -gt $disk_space_limit ] then msg="TIME:$(date +%F_%T) HOSTNAME:$(hostname) IPADDR:$(/usr/sbin/ifconfig |awk 'NR==2{print $2}') MSG:Disk space usage exceeds the limit,current value is ${space_use}%" echo $msg /usr/bin/my_mail $msg fi } m_nginx &>> /tmp/monitor.log m_nfs &>> /tmp/monitor.log m_mem &>> /tmp/monitor.log m_disk_inode &>> /tmp/monitor.log m_disk_space &>> /tmp/monitor.logd.執行驗證
3.編寫計划任務，定時運行監控腳本，完成監控操作
a.制定計划任務
[root@ym script]# crontab -e -u rootb.計划任務內容
* * * * * command
分 時 日 月 周 具體參考 man 5 crontab
注意：盡量全部使用絕對路徑（包括命令，也使用命令的絕對路徑）
c.顯示已經制定的計划任務
[root@ym script]# crontab -l
d.監控正在執行的計划任務
[root@ym script]# tail -f /var/log/cron
e. 郵件驗證
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