MYSQL集群管理节点与数据节点的检测脚本

这两个简单的脚本是用来检测管理节点和数据节点挂掉的时候能被MYSQL集群拉进去。
由于MYSQL集群只能把坏掉的节点踢出去，如果网络端掉或者其他情况。他不能自给拉回来。

1、管理节点的脚本
vi  /var/lib/mysql-cluster/mgmd_check_online.sh
#!/bin/bash
#
# Short managment keep alive file.
#
# Created by david yeung 2007-12-20
#
# Filename: mgmd_check_online.sh.
#
# To determinate whether mgmd process is running or not.
#
ps afx | grep -w ndb_mgmd | grep -v grep 1>&/dev/null

if [ $? == 0 ]
then
  echo "!-------MGMD is ok-------------!">>/var/log/mgmd-check-online.log
else

  # NDBD is dead.
  echo "Check date:`date '+%Y-%m-%d %H:%M:%S'`" | tee -a /var/log/mgmd-check-online.log
  echo "!-------MGMD is dead ----------!" | tee -a /var/log/mgmd-check-online.log
  # Run the managment node.
  /usr/local/mysql/ndb_mgmd -f /etc/config.ini
  echo "!-------MGMD NODE OK-----------!" | tee -a /var/log/mgmd-check-online.log
fi
exit 0


然后加入到crontab

[root@test5 mysql-cluster]#chmod +x mgmd_check_online.sh

[root@test5 mysql-cluster]#crontab -e

*/1 * * * * /var/lib/mysql-cluster/mgmd_check_online.sh

 

2、数据节点的脚本
/usr/local/mysql/data/mgmd_check_online.sh
#!/bin/bash
#
# Created by david yeung 2007-12-20.
#
# Short ndbd node keep alive file.
#
# Filename:ndbd_check_online.sh.
#
# To determinate whether ndbd process is running or not.
#
ps afx | grep -w ndbd | grep -v grep 1>& /dev/null
if [ $? == 0 ]
then
  echo "!-------NDBD is ok-------------!" >> /var/log/ndbd-check-online.log
else
  # NDBD is dead
  echo "!-------NDBD is dead ----------!" | tee -a /var/log/ndbd-check-online.log
  echo "Check date:`date '+%Y-%m-%d %H:%M:%S'`" | tee -a /var/log/ndbd-check-online.log
  echo "!-------RESTART NDBD ----------!" | tee -a /var/log/ndbd-check-online.log
  # The real command.
  /usr/local/mysql/bin/ndbd
  echo "!-------NDBD NODE OK-----------!" | tee -a /var/log/ndbd-check-online.log
fi
exit 0

然后加入到crontab

[root@Redhat51 data]# chmod +x /usr/local/mysql/data/mgmd_check_online.sh

[root@Redhat51 data]# crontab -e

*/1 * * * * /usr/local/mysql/data/mgmd_check_online.sh

 

日志内容：

[root@Redhat51 data]# cat /var/log/ndbd-check-online.log  

root@Redhat51 data]#                    

 !-------NDBD is ok-------------!
!-------NDBD is dead ----------!
Check date:2009-08-21 14:46:58
!-------RESTART NDBD ----------!
!-------NDBD NODE OK-----------!

 

传到另外一个数据节点，然后加入CRONTAB
[root@Redhat51 data]# scp ndbd_check_online.sh
Address 192.168.31.73 maps to localhost, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
password:
ndbd_check_online.sh                          100%  754     0.7KB/s   00:00