Tag Archives: configuration

Zabbix – Clear hosts from untemplated items

Sometimes you run into the problem, that you have a host which had a template attached but somebody wanted to replace the template or something like that and unfortunately hit just “Unlink” instead of “Unlink and Clear” and all the items are still in the host.

If you have only one host it’s normaly no problem to delete all items per hand, but if you have multiple of those hosts it’s quite some work do remove the old items.

Solution nr. one would be tu use the filters to select all items in a specified host group and delte those items, but the applications, discovery rules and so on will still remain in the hosts and have to be deleted in a 2nd/3rd step.

See the Screenshot below:Zabbix Host configuration - item filters

 

My preferred solution for this problem is a simple regex based find/replace with Notepad++.
Herefor an export of the affected hosts is needed. The xml-file could be opend with NPP and the following regexes are needed for find/replace (CTRL+H) to remove the unwanted items.

Find what: (<discovery_rules>[\s\S]*?<\/discovery_rules>)|(<triggers>[\s\S]*?<\/triggers>)|(<inventory>[\s\S]*?<\/inventory>)|(<items>[\s\S]*?<\/items>)

Replace with: (?1<discovery_rules />)(?2<triggers />)(?3<inventory />)(?4<items />)

In the above example multiple regexes with multiple replace-patterns are used to replace the items, discovery rules, triggers an inventory and reset it.

Install Zabbix on Raspberry PI 2

Wouldn’t it be cool to monitor your home? For example all your devices, but also temperature and other sensors an have all that data accessible via a web interfaces?

I think it would so, i thought about setting up Zabbix for home monitoring, but on the RaPi B and B+ it’s not the most performant setup, So i decided to try it again with the PI2.

This post provides a short log on how I set it up.

At first we have to download the source from Zabbix’ SF-page because there is no official package for the ARM-architecture available.

cd /opt
wget http://downloads.sourceforge.net/project/zabbix/ZABBIX%20Latest%20Stable/2.4.6/zabbix-2.4.6.tar.gz?r=http%3A%2F%2Fwww.zabbix.com%2Fdownload.php&ts=1441447329&use_mirror=skylink^C
mv zabbix-2.4.6.tar.gz\?r\=http\:%2F%2Fwww.zabbix.com%2Fdownload.php zabbix-2.4.6.tar.gz
tar xfvz zabbix-2.4.6.tar.gz
cd zabbix-2.4.6/


#With ./configure --help we can see all the availalbe switches which can be used to compile zabbix.
root@raspberrypi /opt/zabbix-2.4.6 # groupadd zabbix
root@raspberrypi /opt/zabbix-2.4.6 # useradd -g zabbix zabbix
root@raspberrypi /opt/zabbix-2.4.6 # ./configure --help


#I used the follwoing switches to compile the zabbix server and agent, use a MySQL-DB, enable jabber-support, lib-xml2 - which is needed for webmonitoring, net-snmp, ssh and curl which is alos needed for webmonitoring. IPMI can be useful if you also hav a realy server with a BMC to monitor. But for most homeusers the IPMI-option is not neede if you only want to monitor your home and thats it. If you have a LDAP/AD-environment where you want to integrate zabbix you also should use the ldap-switch, but I think most home users also do not have a directory service running at home. ;)

#If this command is run there will ocure some erroes in most cases because there are missing dependencies

./configure --enable-server --enable-agent --with-mysql --with-jabber --with-libxml2 --with-net-snmp --with-ssh2 --with-libcurl


apt-get install apache2 php5-mysql mysql-server mysql-common mysql-utilities libiksemel-dev libiksemel-utils libxml2-dev libxml2-utils libxml2 snmp libsnmp-dev libsnmp-perl libssh2-1-dev libssh2-1 libcurl3 libghc-curl-dev libmysql++-dev php5-gd

#now all dependencies should be resolved
./configure --enable-server --enable-agent --with-mysql --with-jabber --with-libxml2 --with-net-snmp --with-ssh2 --with-libcurl

#copy init scripts
cp /opt/zabbix-2.4.6/misc/init.d/debian/* /etc/init.d/
#copy webfrontend
cp -r /opt/zabbix-2.4.6/frontends/php/* /var/www/zabbix/
chown -R www-data:www-data /var/www/zabbix/


#create the database
#at first log in to your mysql-server as a root useradd and runn the following commands
mysql -uroot -p
create database zabbix character set utf8 collate utf8_bin;
CREATE USER 'zabbix'@'localhost' IDENTIFIED BY 'zabbix';
GRANT ALL PRIVILEGES ON zabbix.* TO 'zabbix'@'%' WITH GRANT OPTION;
mysql -uzabbix -pzabbix zabbix < /opt/zabbix-2.4.6/database/mysql/schema.sql
mysql -uzabbix -pzabbix zabbix < /opt/zabbix-2.4.6/database/mysql/images.sql
mysql -uzabbix -pzabbix zabbix < /opt/zabbix-2.4.6/database/mysql/data.sql

#adapt configuration files at /usr/local/etc/ like in the attached examples
#create dircetories for logfiles:
mkdir -p /var/log/zabbix
chown -R zabbix:zabbix /var/log/zabbix/

#create dirs for alert & external scripts 
mkdir -p /var/zabbix/alertscripts
mkdir -p /var/zabbix/externalscripts
chown -R zabbix:zabbix /var/zabbix/


#configure php-settings
vim /etc/php5/apache2filter/php.init
post_max_size = 16M
max_execution_time = 300
max_input_time = 300
#select timezone from http://php.net/manual/en/timezones.php and set:
date.timezone = <TIMEZONE>

#restart/reload webserver to accept changes
service apache2 restart
service zabbix-server restart
service zabbix-agent restart

#open http://<zbxip>/zabbix in browser and finish installation
zabbix installation

 

zabbix-conf