南非蚂蚁,著名Linux专家,知名IT作家。毕业于西安电子科技大学通信工程专业,爱好计算机,毕业后从事计算机行业。曾就职于新浪网、阿里云(万网),任职系统架构师。曾出版畅销书《循序渐进Linux》、《高性能Linux服务器构建实战》作者。
发布时间:2014-09-26 11:00:36
今天刚刚爆出Bash安全漏洞,Bash存在一个安全的漏洞,该漏洞直接影响基于Unix的系统(如Linux、OS X 等)。该漏洞将导致远程攻击者在受影响的系统上执行任意代码。【已确认被成功利用的软件及系统】 所有安装GNU bash 版本小于或者等于4.3的Linux操作系统。 【漏洞描述】 该漏洞源于你调用的.........【阅读全文】
发布时间:2013-11-11 16:20:39
今天,一个很偶然的机会,看到了一本北京邮电大学出版社出版的技术图书《Linux服务器架设、性能调优、集群管理教程——实训与项目案例》,感觉有种似曾相识的感觉,于是打开目录大概了解了下,一个我不想看到的现象发生了:此时一共有16章,而最后4章看着眼熟,于是仔细看了下目录结构,竟然与我2009年写的一本书《循序渐进.........【阅读全文】
exitgogo2016-02-03 15:17
saup007:双主MySQL配置Keepalived,2个角色都为BACKUP,
A节点:
vrrp_script chk_mysql_server {
#script "/opt/keepalived/script/chk_mysql_server.sh"
script "killall -0 mysqld"
interval 30 # 检测时间为30s
weight 21
}
vrrp_instance VI_1 {
state BACKUP
interface eth1
virtual_router_id 59
priority 100
advert_int 1
nopreempt
#mcas_src_ip 172.19.1.201
authentication {
auth_type PASS
auth_pass 1111
}
notify_master "/opt/keepalived/script/master.sh"
notify_backup "/opt/keepalived/script/backup.sh"
notify_fault "/opt/keepalived/script/fault.sh"
notify_stop "/opt/keepalived/script/stop.sh"
track_script {
chk_mysql_server
}
virtual_ipaddress {
172.19.1.249/24 dev eth1 scope global label eth1:0
}
}
B节点:
priority 90
#nopreempt
当停掉A的MySQL,正常切换到B,当把A MySQL启来后,vip依然在B,这个符合逻辑,但把A MySQL启来后,再去停掉B MySQL,VIP却没有飘移到A上,why?
vrrp_script chk_mysql_server {
#script "/opt/keepalived/script/chk_mysql_server.sh"
script "killall -0 mysqld"
interval 30 # 检测时间为30s
weight 21
}
这里面的权重设置有问题,修改weight值
saup0072015-08-27 15:16
双主MySQL配置Keepalived,2个角色都为BACKUP,
A节点:
vrrp_script chk_mysql_server {
#script "/opt/keepalived/script/chk_mysql_server.sh"
script "killall -0 mysqld"
interval 30 # 检测时间为30s
weight 21
}
vrrp_instance VI_1 {
state BACKUP
interface eth1
virtual_router_id 59
priority 100
advert_int 1
nopreempt
#mcas_src_ip 172.19.1.201
authentication {
auth_type PASS
auth_pass 1111
}
notify_master "/opt/keepalived/script/master.sh"
notify_backup "/opt/keepalived/script/backup.sh"
notify_fault "/opt/keepalived/script/fault.sh"
notify_stop "/opt/keepalived/script/stop.sh"
track_script {
chk_mysql_server
}
virtual_ipaddress {
172.19.1.249/24 dev eth1 scope global label eth1:0
}
}
B节点:
priority 90
#nopreempt
当停掉A的MySQL,正常切换到B,当把A MySQL启来后,vip依然在B,这个符合逻辑,但把A MySQL启来后,再去停掉B MySQL,VIP却没有飘移到A上,why?