我们将Nagios Core从4.1.1升级到4.3.4。

备份现有的Nagios配置

Nagios和Apache服务应停止：

# systemctl stop nagios httpd

确保我们有备份：

# rsync -rav /usr/local/nagios//opt/nagios411backup/

升级和配置

下载Nagios Core版本4.3.4并解压缩存档：

# wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.3.4.tar.gz
# tar xf ./nagios-4.3.4.tar.gz && cd ./nagios-4.3.4

配置和编译：

# ./configure --with-command-group=nagcmd
# make all

安装主程序，CGI，HTML文件，示例配置文件等：

# make install
# make install-init
# make install-commandmode
# make install-config
# make install-webconf
# make install-webconfig

从备份中恢复配置文件" nagios.cfg"：

# cp -f /opt/nagios411backup/etc/nagios.cfg /usr/local/nagios/etc/

根据需要恢复密码文件" htpasswd.users"：

# cp -f /opt/nagios411backup/etc/htpasswd.users /usr/local/nagios/etc/

还原对象：

# rsync -rav /opt/nagios411backup/etc/objects//usr/local/nagios/etc/objects/

在我们的情况下，我们还想还原所有自定义监视配置文件：

# rsync -rav /opt/nagios411backup/etc/monitoring//usr/local/nagios/etc/monitoring/

这些已被弃用，并将在将来的版本中删除，现在不妨更改它们：

# sed -i 's/normal_check_interval/check_interval/g' /usr/local/nagios/etc/objects/templates.cfg
# sed -i 's/normal_check_interval/check_interval/g' /usr/local/nagios/etc/objects/printer.cfg
# sed -i 's/normal_check_interval/check_interval/g' /usr/local/nagios/etc/objects/switch.cfg

# sed -i 's/retry_check_interval/retry_interval/g' /usr/local/nagios/etc/objects/templates.cfg
# sed -i 's/retry_check_interval/retry_interval/g' /usr/local/nagios/etc/objects/printer.cfg
# sed -i 's/retry_check_interval/retry_interval/g' /usr/local/nagios/etc/objects/switch.cfg

# sed -i 's/^command_check_interval/#command_check_intervald/g' /usr/local/nagios/etc/nagios.cfg

我们使用Nagiosgraph，因此需要它来继续处理数据(从备份还原的配置文件确实已经包含该行，因此主要供以后参考)。

# sed -i 's/process_performance_data=0/process_performance_data=1/g' /usr/local/nagios/etc/nagios.cfg

重新加载并重新启动服务：

# systemctl daemon-reload
# systemctl restart nagios
# systemctl restart httpd

校验：

# /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
Nagios Core 4.3.4
Copyright (c) 2009-present Nagios Core Development Team and Community Contributors
Copyright (c) 1999-2009 Ethan Galstad
Last Modified: 2016-08-24
License: GPL
Website: https://www.nagios.org
Reading configuration data...
Read main config file okay...
Read object config files okay...
Running pre-flight check on configuration data...
Checking objects...
Checked 1671 services.
Checked 190 hosts.
Checked 44 host groups.
Checked 47 service groups.
Checked 5 contacts.
Checked 6 contact groups.
Checked 126 commands.
Checked 7 time periods.
Checked 0 host escalations.
Checked 0 service escalations.
Checking for circular paths...
Checked 190 hosts
Checked 0 service dependencies
Checked 0 host dependencies
Checked 7 timeperiods
Checking global event handlers...
Checking obsessive compulsive processor commands...
Checking misc settings...
Total Warnings: 0
Total Errors:   0
Things look okay - No serious problems were detected during the pre-flight check

如果新旧Nagios版本之间的配置不匹配会影响您的设置，请相应地进行更改。