heartbeat

Нужно, чтобы при остановке фтп сервера на одном узле, автоматически запускался сервер на другом.

Подготовка окружения

Добавляем интерфейс eth1



[root@server1 ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth1

DEVICE="eth1"
BOOTPROTO="static"
ONBOOT="yes"
IPADDR=10.0.0.1
NETMASK=255.255.255.0

[root@server1 ~]# ssh server2

[root@server2 ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth1

DEVICE="eth1"
BOOTPROTO="static"
ONBOOT="yes"
IPADDR=10.0.0.2
NETMASK=255.255.255.0


CTRL + D

[root@server1 ~]# service network restart && ssh server2 service network restart



[root@server1 ~]# vi /etc/hosts

Добавляем:

############################################
## eth1 - Interconnect Private Network

10.0.0.2 slave.localdomain slave
############################################


[root@server1 ~]# ssh server2


[root@server2 ~]# vi /etc/hosts

Добавляем:

############################################
## eth1 - Interconnect Private Network

10.0.0.1 slave.localdomain slave
############################################


CTRL + D


Убедиться, что с каждого узла идет ping на slave


Инсталляция heartbeat


[root@server1 ~]# rpm -ivh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
[root@server1 ~]# ssh server2 rpm -ivh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

[root@server1 ~]# yum install -y heartbeat && ssh server2 yum install -y heartbeat

[root@server1 ~]# chkconfig --level 345 heartbeat on && ssh server2 chkconfig --level 345 heartbeat on

[root@server1 ~]# yum install -y heartbeat && ssh server2 yum install -y heartbeat

-- Останавливаю фтп сервер, он должен будет подняться скриптами
[root@server1 ~]# service proftpd stop && ssh server2 service proftpd stop
[root@server1 ~]# chkconfig --level 345 proftpd off && ssh server2 chkconfig --level 345 proftpd off




[root@server1 ~]# vi /etc/ha.d/ha.cf

bcast eth0
deadtime 30
initdead 120
auto_failback off
node server1.localdomain
node server2.localdomain
debugfile /var/log/ha-debug
logfile /var/log/ha-log

[root@server1 ~]# scp /etc/ha.d/ha.cf server2:/etc/ha.d/ha.cf


[root@server1 ~]# vi /etc/ha.d/authkeys

auth 1
1 sha1 heartbeatpass

[root@server1 ~]# scp /etc/ha.d/authkeys server2:/etc/ha.d/authkeys


[root@server1 ~]# chmod 600 /etc/ha.d/authkeys && ssh server2 chmod 600 /etc/ha.d/authkeys


[root@server1 ~]# vi /etc/ha.d/resource.d/ftpserv

#!/bin/sh
# Don't forget disable autostart service
# Uncomment starting services compatible with FreeBSD/Ubuntu
case $1 in
start)
        /etc/init.d/proftpd start
        ;;
stop)
        /etc/init.d/proftpd stop
        ;;
esac

exit 0


[root@server1 ~]# chmod +x /etc/ha.d/resource.d/ftpserv
[root@server1 ~]# scp /etc/ha.d/resource.d/ftpserv server2:/etc/ha.d/resource.d/ftpserv


-- Файл один на обоих узлах. 
-- 192.168.1.20 - виртуальный интерфейс на каждом из хостов.
[root@server1 ~]# vi /etc/ha.d/haresources
server1.localdomain \
    IPaddr2::192.168.1.20/32/eth0 \
    ftpserv

[root@server1 ~]# scp /etc/ha.d/haresources server2:/etc/ha.d/haresources

[root@server1 ~]# service heartbeat restart && ssh server2 service heartbeat restart



Проверки

[root@server1 ha.d]# ps ax | grep heartbeat
[root@server1 ha.d]# ssh server2 ps ax | grep heartbeat


[root@server1 ha.d]# cl_status nodestatus server1.localdomain
active
[root@server1 ha.d]# cl_status nodestatus server2.localdomain
active


[root@server1 ha.d]# ps ax | grep ftp
 2054 ?        Ss     0:00 proftpd: (accepting connections)
 2449 pts/0    S+     0:00 grep ftp
[root@server1 ha.d]# ssh server2 ps ax | grep ftp
[root@server1 ha.d]# 



[root@server1 ha.d]# ip addr show eth0
2: eth0:  mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 08:00:27:93:1e:10 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.21/24 brd 192.168.1.255 scope global eth0
    inet 192.168.1.21/32 brd 192.168.1.255 scope global eth0
    inet 192.168.1.20/32 brd 192.168.1.255 scope global eth0
    inet6 fe80::a00:27ff:fe93:1e10/64 scope link 
       valid_lft forever preferred_lft forever





[root@server1 ~]# less /var/log/ha-debug
[root@server1 ~]# less /var/log/ha-log



Копирование


[root@server1 ~]# vi /etc/rsyncd.conf

pid file = /var/run/rsyncd.pid

[home]
        uid = root
        use chroot = yes
        path = /home
        read only = no
        hosts allow = slave


[root@server1 ~]# scp /etc/rsyncd.conf server2:/etc/rsyncd.conf

[root@server1 ~]# crontab -e
* * * * * ps ax | grep -v grep | grep -q 'proftpd: (accepting connections)' && /usr/bin/rsync -a /home/ slave::home


[root@server1 ~]# ssh server2

[root@server2 ~]# crontab -e
* * * * * ps ax | grep -v grep | grep -q 'proftpd: (accepting connections)' && /usr/bin/rsync -a /home/ slave::home



[root@server1 ~]# ssh slave
The authenticity of host 'slave (10.0.0.2)' can't be established.
RSA key fingerprint is 0d:b6:67:4c:37:94:d8:b4:91:48:33:fd:e5:74:65:5a.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'slave,10.0.0.2' (RSA) to the list of known hosts.
Last login: Sun Feb  2 03:57:09 2014 from 192.168.1.21

[root@server2 ~]# ssh slave
The authenticity of host 'slave (10.0.0.1)' can't be established.
RSA key fingerprint is 0d:b6:67:4c:37:94:d8:b4:91:48:33:fd:e5:74:65:5a.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'slave,10.0.0.1' (RSA) to the list of known hosts.
Last login: Sun Feb  2 03:57:04 2014 from 192.168.1.22