Cacti: traffic analysis and monitoring network: Difference between revisions

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Cacti is a complete network monitoring and data analising solution using RRDTool's data storage and graphing functionality. It is the most widely used monitoring tool by ISPs to see graphically the network.
Cacti is a complete network monitoring and data analyzing solution using RRDTool's data storage and graphing functionality. It is the most widely used monitoring tool by ISPs to see the network graphically.


== Dedicated host preconfiguration ==
== Dedicated host pre configuration ==


'''Cacti have very special and fixed requirements''' from the host, so for production systems must be installed on a dedicated host machine.
'''Cacti has very special and fixed requirements''' from the host. For production systems, it must be installed on a dedicated host machine.
 
{{Note|here we use "venenux.net" as the domain. please change to your domain. if you are installing locally, use "localdomain"}}


=== Hostname setup ===
=== Hostname setup ===
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</nowiki></pre>
</nowiki></pre>


We added as plus the ip address of cdn alpine linux to avoid more packeds from a DNS server.
We added the ip address of cdn Alpine Linux to reduce DNS server traffic.


=== Repositories and packages ===
=== Repositories and packages ===


Unfortunatelly some commands are more complex, we must take in consideration that common commands are just busybox minimalist versions, so we must change it to normal ones:
Unfortunately, some commands are more complex. We must take into consideration that common commands are just busybox minimalist versions, so we must make changes to ensure we are using the real ones. The following commands install bash as well as some other system tools as shown below. If they aren't present, Catci will fail randomly:


<pre><nowiki>
<pre><nowiki>
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apk update
apk update


apk add attr dialog binutils findutils readline lsof less nano curl
apk add bash attr dialog binutils findutils readline lsof less nano curl


export PAGER=less
export PAGER=less
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apk update
apk update
</nowiki></pre>
</nowiki></pre>
Take into consideration that if one package is retrieved, it must be the only package! i.e. not all the packages. First install all the dependencies and related files from the normal repository and later install only the required extras from edge! For that, you must visit https://pkgs.alpinelinux.org/packages and search for all the requirements of the involved package from edge. like <code>utmps</code>.


== Requirements ==
== Requirements ==


* A web server like ''lighttpd''
Before installing Cacti, many other packages must be installed and configured.
* The ''PHP'' scripting support
 
* A database engine like ''mariadb''
* A web server e.g. ''lighttpd''
* To retreive data the ''net-snmp'' tools
* The ''PHP'' scripting language
* To graphics the data the ''rrtool'' package
* A database engine e.g. ''mariadb''
* To retreive data, ''net-snmp'' tools
* To graph the data, the ''rrdtool'' package


{{Warning|These complex configurations '''will be necessary''', as Cacti is demanding in its requirements once installed to right functionality.}}
{{Warning|These complex configurations '''will be necessary''', as Cacti is demanding in its installation requirements to ensure complete functionality.}}


=== The web server: Lighttpd installation and configuration ===
=== The web server: Lighttpd installation and configuration ===


Cacti runs as a web program, so we need the web server configured, due apache2 are so famous we only will document the lighttpd, becose for more used options there's already so much info:
Cacti runs as a web program, so we need the web server configured, Because Apache2 is so well known, we will document only lighttpd. There is a lot of info available about configuration options:
 
* setup port, cache engine, event handler of lighttpd, with htdocs
* setup web server status page
* setup alias mod for aliasing, cgi handler, and create the directories with the correct permissions
* setup the webserver start script and start the webserver to test it
* add network back-end handler. file descriptor setup and improve file cache retrieval time
* setup https and generate self signed certificate


<pre><nowiki>
<pre><nowiki>
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rc-service lighttpd restart
rc-service lighttpd restart


checkset="";checkset=$(grep 'noatime' /etc/lighttpd/lighttpd.conf);[[ "$checkset" != "" ]] && echo listo || sed -i -r 's#server settings.*#server settings"\nserver.use-noatime = "enable"\n#g' /etc/lighttpd/lighttpd.conf
checkset="";checkset=$(grep 'noatime' /etc/lighttpd/lighttpd.conf);[[ "$checkset" != "" ]] && \
echo listo || sed -i -r 's#server settings.*#server settings"\nserver.use-noatime = "enable"\n#g' /etc/lighttpd/lighttpd.conf


checkset="";checkset=$(grep 'network-backend' /etc/lighttpd/lighttpd.conf);[[ "$checkset" != "" ]] && echo listo || sed -i -r 's#server settings.*#server settings"\nserver.network-backend = "linux-sendfile"\n#g' /etc/lighttpd/lighttpd.conf
checkset="";checkset=$(grep 'network-backend' /etc/lighttpd/lighttpd.conf);[[ "$checkset" != "" ]] && \
echo listo || sed -i -r 's#server settings.*#server settings"\nserver.network-backend = "linux-sendfile"\n#g' /etc/lighttpd/lighttpd.conf


checkset="";checkset=$(grep 'max-fds' /etc/lighttpd/lighttpd.conf);[[ "$checkset" != "" ]] && echo listo || sed -i -r 's#server settings.*#server settings\nserver.max-fds = 2048\n#g' /etc/lighttpd/lighttpd.conf
checkset="";checkset=$(grep 'max-fds' /etc/lighttpd/lighttpd.conf);[[ "$checkset" != "" ]] && \
echo listo || sed -i -r 's#server settings.*#server settings\nserver.max-fds = 2048\n#g' /etc/lighttpd/lighttpd.conf


rc-service lighttpd restart
rc-service lighttpd restart
</nowiki></pre>
</nowiki></pre>


{{Note|Next steps are purelly optional, just made to able to use only https to all the traffic between the host monitor of cacti and the rest of monitoring devices!}}
{{Warning|Next steps are '''recommended''' but optional, Cacti can use only https for the traffic between the host monitor and the rest of monitored devices! Cacti should be accessed only over TLS. (https) Otherwise, passwords and user data will be exposed. The following steps will generate a self signed cert file that will require accepting a custom exception on the web browser, but all of the https traffic will use TLS/SSL.}}


<pre><nowiki>
<pre><nowiki>
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}
}
EOF
EOF
sed -i -r 's#\#.*mod_redirect.*,.*#    "mod_redirect",#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#\#.*mod_redirect.*,.*#    "mod_redirect",#g' /etc/lighttpd/lighttpd.conf
itawxrc="";itawxrc=$(grep 'include "mod_ssl.conf' /etc/lighttpd/lighttpd.conf);[[ "$itawxrc" != "" ]] && echo listo || sed -i -r 's#.*include "mime-types.conf".*#include "mime-types.conf"\ninclude "mod_ssl.conf"#g' /etc/lighttpd/lighttpd.conf
 
itawxrc="";itawxrc=$(grep 'include "mod_ssl.conf' /etc/lighttpd/lighttpd.conf);[[ "$itawxrc" != "" ]] && echo listo || \
sed -i -r 's#.*include "mime-types.conf".*#include "mime-types.conf"\ninclude "mod_ssl.conf"#g' /etc/lighttpd/lighttpd.conf
 
sed -i -r 's#ssl.pemfile.*=.*#ssl.pemfile  = "/etc/ssl/certs/localhost.pem"#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#ssl.pemfile.*=.*#ssl.pemfile  = "/etc/ssl/certs/localhost.pem"#g' /etc/lighttpd/lighttpd.conf
rc-service lighttpd restart
rc-service lighttpd restart
</nowiki></pre>
</nowiki></pre>
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=== The PHP: installation and configurations ===
=== The PHP: installation and configurations ===


Next requirement are the PHP scripting lang, becose Cacti are build with PHP, and has support for LDAP also.
Next requirement is the PHP scripting Language. Because Cacti are build with PHP, it has support for LDAP.
 
{{Note|Cacti supports PHP5 and PHP7. In the next section, we will only cover PHP7 because that's only version available that works with recent Alpine versions. If you use an older Alpine host for testing, you can use this command to detect what to install <code><nowiki>export phpmax=$(debver=$(cat /etc/alpine-release|cut -d '.' -f1);[ $debver -ge 6 ] && echo  7|| echo 5)</nowiki></code>, the shel var <code>phpmax</code> indicates based on Alpine version if 5 or 7 php will be used in command lines as: <code>apk add php$phpmax</code>.}}


{{Note|Cacti supports PHP5 and PHP7, in next section we will only cover PHP7 becose are the only availabe at recent Alpine versions, but if you use any older Alpine host for testing, you can use this command to detect what to install <code><nowiki>export phpmax=$(debver=$(cat /etc/alpine-release|cut -d '.' -f1);[ $debver -ge 6 ] && echo  7|| echo 5)</nowiki></code>, the shel var <code>phpmax</code> indicates based on Alpine version if 5 or 7 php will be used in command lines as: <code>apk add php$phpmax</code>.}}
The commit that mess is at, is: https://git.alpinelinux.org/aports/commit/community/cacti/cacti.php-fpm.conf?id=4272e802a1be191657becb739e6a248c1d0411a7 where a specific pool for php-fpm is made for cacti. It's a mess because it's not documented. We must avoid and ignore it if we are to properly configure the general pool:


<pre><nowiki>
<pre><nowiki>
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</nowiki></pre>
</nowiki></pre>


The following configurations are for high or huge loads on a 2G RAM server, for more information about configuring PHP on Alpine linux see [[Production LAMP system: Lighttpd + PHP + MySQL]] wiki page.
The following configurations are for high or huge loads on a 2G RAM server, for more information about configuring PHP on Alpine Linux see [[Production LAMP system: Lighttpd + PHP + MySQL]] wiki page.


<pre><nowiki>
<pre><nowiki>
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</nowiki></pre>
</nowiki></pre>


After have php ready, lest integrate into the current preinstalled web server, we already choose lighttpd so:
After you have php ready, let's integrate it into the current preinstalled web server. We've chosen lighttpd, so the commands are:


<pre><nowiki>
<pre><nowiki>
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</nowiki></pre>
</nowiki></pre>


To test PHP are woring correctly, browse the web server with <code>http://ipaddress/info.php</code> of course change "ipaddrs" with the ip of the web server.
To test PHP is working correctly, browse to <code><nowiki>http://ipaddress/info.php</nowiki></code> Change "ipaddrs" to the web server's ip address.


=== The Database: MariaDB installation and configuration ===
=== The Database: MariaDB installation and configuration ===


{{Warning|Cacti also can run with PostgreSQL, inclusivelly are a better choice for high production and huge data systems, but we documented here mysql only due postgresql need more complex tunning parameters}}
{{Warning|Cacti also can run with PostgreSQL, it's a better choice for heavily loaded production and huge data systems. We documented mysql only because postgresql needs complex tunning parameters}}


{{Note|Also can install '''adminer to manage the database''' using web browsing, see [[Production LAMP system: Lighttpd + PHP + MySQL#adminer:_Web_Frontend_administration|Adminer in production LAMP systems]] that can manage any kind of database graphically}}
{{Note|You can install '''adminer to manage the database''' via a web browser. See [[Production LAMP system: Lighttpd + PHP + MySQL#adminer:_Web_Frontend_administration|Adminer in production LAMP systems]] that can manage any kind of database via a GUI}}


<pre><nowiki>
<pre><nowiki>
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</nowiki></pre>
</nowiki></pre>


After those commands runs the <code>mysql_secure_installation</code> script and answer as follows:
After those commands run the <code>mysql_secure_installation</code> script, and answer as follows:
 
# '''Enter current password for root (for none, enter):''' it must be provided because we've set it previously. Correct response is <code>OK, successfully used password, moving on...</code>
#  '''Switch to unix_socket authentication [Y/n]''' Not used. Must be disabled, '''answer NO''', the response will be <code>... skipping.</code>
# '''Change the root password? [Y/n]''' Press "n" only if you provided a good password, otherwise change it!
# '''Remove anonymous users? [Y/n]''' In a '''production system, we must remove them, so answer Y''' the correct response is <code>... Success!</code>.
# '''Disallow root login remotely? [Y/n]''' Answer Y''' proper response is <code>... Success!</code>.
# '''Remove test database and access to it? [Y/n]''' You should removed it, so answer Y''' the proper response is <code>... Success!</code>.
# '''Reload privilege tables now? [Y/n]''' Aanswer Y''' proper response is <code>... Success!</code>.


# '''Enter current password for root (enter for none):''' must be provided due we already set previously. correct respond are <code>OK, successfully used password, moving on...</code>
After you respond to all of the questions, restart the service with <code>rc-service mariadb restart</code>
#  '''Switch to unix_socket authentication [Y/n]''' this are not the case and must be disabled, '''so answer NO''', and response will be <code>... skipping.</code>
# '''Change the root password? [Y/n]''' Just press "n" only if you provided a good password, otherwise just change it!
# '''Remove anonymous users? [Y/n]''' In any case, '''production system must remove it, so answer Y''' and proper respond mus be  <code>... Success!</code>.
# '''Disallow root login remotely? [Y/n]''' For sure answer Y''' and proper respond mus be  <code>... Success!</code>.
# '''Remove test database and access to it? [Y/n]''' Should be removed, so answer Y''' and proper respond mus be  <code>... Success!</code>.
# '''Reload privilege tables now? [Y/n]''' Aanswer Y''' and proper respond mus be  <code>... Success!</code>.


After reponse all the questions.. restart the service with <code>rs-service mariadb restart</code>
=== The tools: net-snmp and rrdtool ===


=== The tools: net-snmp and rrtool ===


WIP
{{Warning|do no set <code><nowiki>agentAddress tcp:161,tcp6:[::1]:161</nowiki></code>, by default the package adds the udp 161 protocol, so if you set it, it will only listen and show info using ipv6 only}}


<pre><nowiki>apk add net-snmp net-snmp-tools rrtool</nowiki></pre>
<pre><nowiki>
apk add net-snmp net-snmp-tools rrdtool
 
cat > /etc/snmp/snmpd.conf << EOF
view systemonly included .1.3.6.1.2.1.1
view systemonly included .1.3.6.1.2.1.25.1
rocommunity  public localhost
rocommunity  public default -V systemonly
sysLocation    Bolivar Upata Venezuela
sysContact    infoadmin <info@pacificnetwork.com>
sysServices    72
EOF
 
rc-update add snmpd default
 
rc-service snmpd restart
</nowiki></pre>
 
Here we need only the commands for cacti. For more info about the topic see:
 
* [[Setting_up_traffic_monitoring_using_rrdtool_(and_snmp)]]
* [[Setting_up_monitoring_using_rrdtool_(and_rrdcollect)]]
* [[Setting_up_A_Network_Monitoring_and_Inventory_System]]


== Cacti Installation ==
== Cacti Installation ==


As of Alpine 3.12, Cacti still are in edge branch, so we first pre-install the depends packages and later only from edge the cacti alone.
As of Alpine 3.12, Cacti still is in the edge branch, so first we pre-install the dependency packages. Afterward, from edge, we install only cacti.


=== Installing Dependency Packages ===
=== Installing Cacti Packages ===


{{Warning|As of Alpine 3.12, Cacti still are in edge branch so '''we need to separate stable package depends from cacti package it selft at install them''', if not, any security fix will be bypass if you will run production stable release (due that package was installed from edge and are more up to date rather than the stable ones).}}
{{Warning|As of Alpine 3.5, Cacti was a only one package, i.e. "cacti". Beginning with Alpine 3.6, The cacti package is split into more than obe package. The commit that mess all is where a specific pool for php-fpm is made for cacti. It's a mess because it's not documented. We must avoid and ignore it if we are to properly configure the general pool:}}


<pre><nowiki>
<pre><nowiki>
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apk add bash busybox coreutils net-snmp-tools perl rrdtool ttf-dejavu php7-snmp
apk add bash busybox coreutils net-snmp-tools perl rrdtool ttf-dejavu php7-snmp
apk add cacti cacti-setup cacti-php7 cacti-lang
</nowiki></pre>
</nowiki></pre>


=== Install Cacti packages ===
== Cacti pre Configuration ==


{{Warning|As of Alpine 3.12, Cacti still are in edge branch so '''we need to separate stable package depends from cacti package it selft at install them''', if not, any security fix will be bypass if you will run production stable release (due that package was installed from edge and are more up to date rather than the stable ones).}}
Cacti is run under the cacti user. We temporally set the file permissions to world writeable, then later, we'll set them correctly.


<pre><nowiki>
<pre><nowiki>
cat > /etc/apk/repositories << EOF
cat > /etc/lighttpd/mod_cacti.conf << EOF
http://dl-cdn.alpinelinux.org/alpine/v$(cat /etc/alpine-release | cut -d'.' -f1,2)/main
alias.url += (
http://dl-cdn.alpinelinux.org/alpine/v$(cat /etc/alpine-release | cut -d'.' -f1,2)/community
    "/cacti/"     =>    "/usr/share/webapps/cacti/"
http://dl-cdn.alpinelinux.org/alpine/edge/main
)
http://dl-cdn.alpinelinux.org/alpine/edge/community
\$HTTP["url"] =~ "^/cacti/" {
http://dl-cdn.alpinelinux.org/alpine/edge/testing
    dir-listing.activate = "disable"
}
EOF
EOF


apk update
sed -i -r 's#\#.*mod_alias.*,.*#    "mod_alias",#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#\#.*mod_accesslog.*,.*#    "mod_accesslog",#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#\#.*mod_setenv.*,.*#    "mod_setenv",#g' /etc/lighttpd/lighttpd.conf


apk add cacti cacti-setup cacti-php7 cacti-lang
sed -i -r 's#.*include "mod_cgi.conf".*#  include "mod_cgi.conf"#g' /etc/lighttpd/lighttpd.conf


cat > /etc/apk/repositories << EOF
checkssl="";checkssl=$(grep 'include "mod_cacti.conf' /etc/lighttpd/lighttpd.conf);[[ "$checkssl" != "" ]] && echo listo || sed -i -r 's#.*include "mod_cgi.conf".*#include "mod_cgi.conf"\ninclude "mod_cacti.conf"#g' /etc/lighttpd/lighttpd.conf
http://dl-cdn.alpinelinux.org/alpine/v$(cat /etc/alpine-release | cut -d'.' -f1,2)/main
http://dl-cdn.alpinelinux.org/alpine/v$(cat /etc/alpine-release | cut -d'.' -f1,2)/community
EOF


apk update
rc-service lighttpd restart
</nowiki></pre>
</nowiki></pre>


=== Pre configurations ===
Cacti runs under the cacti user, but web server user (apache2, lighttpd) also needs access. So enable group access and as we said, temporally set world-writeable file permissions permissions:


Cacti are run under cacti user, but lighttpd user also needs access durint install setup, so we temporally set all world write permissions to the files and later fix the permissions access:
# grant temporary access to the web server
# Create the cacti database and populate it
# Grant Cacti MySQL user access (give it a more secure password):
# Quit from Mysql command prompt:
# Import the initial Cacti MySQL database
# set the user, password, and database name to the cacti config file
# temporarily grant world-write permission to the cacti log and lib directories


{{Cmd|ln -s /usr/share/webapps/cacti /var/www/localhost/htdocs/cacti}}
<pre><nowiki>
chown -R cacti:lighttpd /usr/share/webapps/cacti/;chown -R cacti:lighttpd /var/lib/cacti/


Assign permits to lighttpd user:
mysql -u root -p -e "CREATE DATABASE cacti;"


{{Cmd|chown -R lighttpd:lighttpd /var/www/localhost/htdocs/cacti/}}
mysql -u root -p -e "GRANT ALL ON cacti.* TO 'cactiuser'@'localhost' IDENTIFIED BY 'cactipassword';FLUSH PRIVILEGES;


In case you are using other web server than lighttpd have to assign permits to that user.
mysql -u root -p -e "GRANT GRANT OPTION ON cacti.* TO 'cactiuser'@'localhost';FLUSH PRIVILEGES;"
If it hasn't already been done, setup MySQL:
Create the cacti database and populate it
Grant Cacti MySQL user access (give it a more secure password):
Quit from Mysql command prompt:
Import the initial Cacti MySQL database


{{Cmd| mysql -u root -p}}
mysql -u root -p -e "GRANT SELECT ON mysql.time_zone_name TO 'cactiuser'@'localhost';"
{{Cmd| mysql> create database cacti;}}
{{Cmd| mysql> grant all on cacti.* to 'cactiuser'@'localhost' identified by 'MostSecurePassword'; flush privileges;}}
{{Cmd| mysql> \q }}
{{Cmd|<nowiki>mysql --user=cacti -p cacti < /usr/share/webapps/cacti/cacti.sql</nowiki>}}


Edit and put in the password you used in the above step for the mysql user.  
mysql --user=cactiuser -p cactipassword cacti < /usr/share/webapps/cacti/cacti.sql


{{Cmd|vi /var/www/localhost/htdocs/cacti/include/config.php}}
sed -i -r 's#\$database_default.*=.*;#\$database_default  = 'cacti';#g' /etc/cacti/config.php
sed -i -r 's#\$database_username.*=.*;#\$database_username  = 'cactiuser';#g' /etc/cacti/config.php
sed -i -r 's#\$database_password.*=.*;#\$database_password  = 'cactipassword';#g' /etc/cacti/config.php
 
chmod 777 /var/log/cacti
chmod 666 /var/log/cacti/*.log
</nowiki></pre>


=== Cacti web setup install ===
=== Cacti web setup install ===
Login using:
Password= admin user= admin
Next will be prompted to change password:
change password.<br />


In the web page click:
In the web page click:
: -> Next
: -> Next
Then select new install in case is not selected:
Then select new install if+ it's not selected:
: -> New install, Next
: -> New install, Next
{{Warning|take note since cacti 1.2.8 and still at cacti 1.2.10, installer have several errors for <code>Cacti_Stats.xml.gz</code> template, so last "check" has no description. You must uncheck last as described here: https://github.com/Cacti/cacti/issues/3313#issuecomment-594114681 Th template can be installed later via the cli as: <code><nowiki>php -d max_execution_time=90 /usr/share/webapps/cacti/cli/import_package.php
--filename=Cacti_Stats.xml.gz</nowiki></code> under the templates directory of the cacti install, but currently it hangs and never gets installed. Reported at https://github.com/Cacti/cacti/issues/3313#issuecomment-601508135 }}
Then finish
Then finish
: -> Finish
: -> Finish
Login using:
Password= admin user= admin
Next wil be prompted to change password:
change password.<br />
Add to crontab:<br />
Add to crontab:<br />
== Cacti post configuration ==
<pre><nowiki>
chmod 775 /var/log/cacti
chmod 664 /var/log/cacti/*.log
</nowiki></pre>
=== Pooler and crontab ===
As we said, cacti needs a crontab for pool collection of data! These steps are not necesary as of Alpine 3.7 because the cacti package installs all necesary files.
{{Note|These steps are only for older cacti packages up to Alpine version 3.6. Starting with version 3.7, cacti packages install a crontab for data collection}}


  cd /etc/crontabs
  cd /etc/crontabs
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copy to the end of the file:
copy to the end of the file:
  */5 * * * * lighttpd php /var/www/localhost/htdocs/cacti/poller.php > /dev/null 2>&1
  */5 * * * * lighttpd php /var/www/localhost/htdocs/cacti/poller.php > /dev/null 2>&1
In case you are using other web server have to modify the "lighttpd" user.
In case you are using another web server, you have to modify the "lighttpd" user.
  */5 * * * * "web server user" php /var/www/localhost/htdocs/cacti/poller.php > /dev/null 2>&1
  */5 * * * * "web server user" php /var/www/localhost/htdocs/cacti/poller.php > /dev/null 2>&1


Add your devices and you're ready to start monitoring!
'''Add your devices and you're ready to start monitoring!'''
 
=== cacti plugins ===
 
If you used the latest cacti, you must use the latest development version of each plugin especially if you're using php7 on your webserver:
 
00<pre><nowiki>
cd /usr/share/webapps/cacti/plugins/
 
wget https://github.com/Cacti/plugin_mikrotik/archive/master.tar.gz -O cacti-1.2.11-plugin-monitor.tar.gz
wget https://github.com/Cacti/plugin_gexport/archive/master.tar.gz -O cacti-1.2.11-plugin-gexport.tar.gz
wget https://github.com/Cacti/plugin_routerconfigs/archive/master.tar.gz -O cacti-1.2.11-plugin-routerconfigs.tar.g
wget https://github.com/Cacti/plugin_monitor/archive/master.tar.gz cacti-1.2.11-plugin-reportit.tar.gz
wget https://github.com/Cacti/plugin_reportit/archive/master.tar.gz -O cacti-1.2.11-plugin-reportit.tar.gz
</nowiki></pre>
 
After extract all of the files, change and fix permissions:
 
<pre><nowiki>
cd /usr/share/webapps/cacti/plugins/
 
chown -R cacti:lighttpd /usr/share/webapps/cacti/
 
chown -R cacti:lighttpd /var/lib/cacti/
</nowiki></pre>
 
Go to cacti configuration and plugins via the web interface to install and enable all of them.
 
== Re-installing Cacti ==
 
Let's suppose you make a mess of everything and want to reinstall all of it from the beginning. Let's get started:
 
=== Erase everything cacti related ===
 
# remove istalled packages
# remove configuration files
# remove databases and users from mysql/postgresql (here only mysql for example)
# reconfigure to not load the cacti web server configuration
# restart services because the cacti pool was erased and lighttpd must reload its config files
 
<pre><nowiki>
apk del cacti cacti-setup cacti-php7 cacti-lang
 
rm -rf /var/log/cacti
 
rm -rf /usr/share/webapps/cacti
 
rm -rf /etc/cacti
 
mysql -u root -p -e "DROP DATABASE cacti;"
 
mysql -u root -p -e "DROP USER 'cactiuser'@'localhost'"
 
sed -i "/include \"mod_cacti.conf\"/d" /etc/lighttpd/lighttpd.conf
 
rc-service php-fpm7 restart
 
rc-service lighttpd restart
</nowiki></pre>
 
After you complete all of these steps, repeat all the steps from [[Cacti:_traffic_analysis_and_monitoring_network#Cacti_Installation|Cacti_Installation section]].


= See Also =
= See Also =


* [[Setting_up_traffic_monitoring_using_rrdtool_(and_snmp)]]
* [[Setting_up_monitoring_using_rrdtool_(and_rrdcollect)]]
* [[Setting_up_A_Network_Monitoring_and_Inventory_System]]
* [[Production LAMP system: Lighttpd + PHP + MySQL]]
* [[Production Lets Encrypt: dehydrated]]
* [[Alpine newbie developer]]
* [[Alpine newbie lammers]]
[[Category:Newbie]]
[[Category:Server]]
[[Category:Server]]
[[Category:Web_Server]]
[[Category:Web_Server]]

Latest revision as of 14:04, 6 January 2022

Cacti is a complete network monitoring and data analyzing solution using RRDTool's data storage and graphing functionality. It is the most widely used monitoring tool by ISPs to see the network graphically.

Dedicated host pre configuration

Cacti has very special and fixed requirements from the host. For production systems, it must be installed on a dedicated host machine.

Note: here we use "venenux.net" as the domain. please change to your domain. if you are installing locally, use "localdomain"

Hostname setup

hostname monitor

echo 'hostname="monitor"' > /etc/conf.d/hostname 

echo "monitor" > /etc/hostname

cat > /etc/hosts << EOF
127.0.0.1 monitor.venenux.net monitor localhost.localdomain localhost
151.101.128.249 dl-cdn.alpinelinux.org
::1 localhost localhost.localdomain
EOF

We added the ip address of cdn Alpine Linux to reduce DNS server traffic.

Repositories and packages

Unfortunately, some commands are more complex. We must take into consideration that common commands are just busybox minimalist versions, so we must make changes to ensure we are using the real ones. The following commands install bash as well as some other system tools as shown below. If they aren't present, Catci will fail randomly:

cat > /etc/apk/repositories << EOF
http://dl-cdn.alpinelinux.org/alpine/v$(cat /etc/alpine-release | cut -d'.' -f1,2)/main
http://dl-cdn.alpinelinux.org/alpine/v$(cat /etc/alpine-release | cut -d'.' -f1,2)/community
EOF

apk update

apk add bash attr dialog binutils findutils readline lsof less nano curl

export PAGER=less

cat > /etc/apk/repositories << EOF
http://dl-cdn.alpinelinux.org/alpine/v$(cat /etc/alpine-release | cut -d'.' -f1,2)/main
http://dl-cdn.alpinelinux.org/alpine/v$(cat /etc/alpine-release | cut -d'.' -f1,2)/community
http://uk.alpinelinux.org/alpine/edge/main
http://uk.alpinelinux.org/alpine/edge/community
EOF

apk update

apk add utmps

cat > /etc/apk/repositories << EOF
http://dl-cdn.alpinelinux.org/alpine/v$(cat /etc/alpine-release | cut -d'.' -f1,2)/main
http://dl-cdn.alpinelinux.org/alpine/v$(cat /etc/alpine-release | cut -d'.' -f1,2)/community
EOF

apk update

Take into consideration that if one package is retrieved, it must be the only package! i.e. not all the packages. First install all the dependencies and related files from the normal repository and later install only the required extras from edge! For that, you must visit https://pkgs.alpinelinux.org/packages and search for all the requirements of the involved package from edge. like utmps.

Requirements

Before installing Cacti, many other packages must be installed and configured.

  • A web server e.g. lighttpd
  • The PHP scripting language
  • A database engine e.g. mariadb
  • To retreive data, net-snmp tools
  • To graph the data, the rrdtool package
Warning: These complex configurations will be necessary, as Cacti is demanding in its installation requirements to ensure complete functionality.


The web server: Lighttpd installation and configuration

Cacti runs as a web program, so we need the web server configured, Because Apache2 is so well known, we will document only lighttpd. There is a lot of info available about configuration options:

  • setup port, cache engine, event handler of lighttpd, with htdocs
  • setup web server status page
  • setup alias mod for aliasing, cgi handler, and create the directories with the correct permissions
  • setup the webserver start script and start the webserver to test it
  • add network back-end handler. file descriptor setup and improve file cache retrieval time
  • setup https and generate self signed certificate
apk add lighttpd gamin

mkdir -p /var/www/localhost/htdocs
sed -i -r 's#\#.*server.port.*=.*#server.port          = 80#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#.*server.stat-cache-engine.*=.*# server.stat-cache-engine = "fam"#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#\#.*server.event-handler = "linux-sysepoll".*#server.event-handler = "linux-sysepoll"#g' /etc/lighttpd/lighttpd.conf

mkdir -p /var/www/localhost/htdocs/serverinfo
sed -i -r 's#\#.*mod_status.*,.*#    "mod_status",#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#.*status.status-url.*=.*#status.status-url  = "/serverinfo/server-status"#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#.*status.config-url.*=.*#status.config-url  = "/serverinfo/server-config"#g' /etc/lighttpd/lighttpd.conf

mkdir -p /var/www/localhost/cgi-bin
sed -i -r 's#\#.*mod_alias.*,.*#    "mod_alias",#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#.*include "mod_cgi.conf".*#   include "mod_cgi.conf"#g' /etc/lighttpd/lighttpd.conf

mkdir -p /var/lib/lighttpd
chown -R lighttpd:lighttpd /var/www/localhost/
chown -R lighttpd:lighttpd /var/lib/lighttpd
chown -R lighttpd:lighttpd /var/log/lighttpd

rc-update add lighttpd default

rc-service lighttpd restart

checkset="";checkset=$(grep 'noatime' /etc/lighttpd/lighttpd.conf);[[ "$checkset" != "" ]] && \
echo listo || sed -i -r 's#server settings.*#server settings"\nserver.use-noatime = "enable"\n#g' /etc/lighttpd/lighttpd.conf

checkset="";checkset=$(grep 'network-backend' /etc/lighttpd/lighttpd.conf);[[ "$checkset" != "" ]] && \
echo listo || sed -i -r 's#server settings.*#server settings"\nserver.network-backend = "linux-sendfile"\n#g' /etc/lighttpd/lighttpd.conf

checkset="";checkset=$(grep 'max-fds' /etc/lighttpd/lighttpd.conf);[[ "$checkset" != "" ]] && \
echo listo || sed -i -r 's#server settings.*#server settings\nserver.max-fds = 2048\n#g' /etc/lighttpd/lighttpd.conf

rc-service lighttpd restart
Warning: Next steps are recommended but optional, Cacti can use only https for the traffic between the host monitor and the rest of monitored devices! Cacti should be accessed only over TLS. (https) Otherwise, passwords and user data will be exposed. The following steps will generate a self signed cert file that will require accepting a custom exception on the web browser, but all of the https traffic will use TLS/SSL.


apk add openssl

mkdir -p /etc/ssl/certs/

openssl req -x509 -days 1460 -nodes -newkey rsa:4096 \
   -subj "/C=VE/ST=Bolivar/L=Upata/O=VenenuX/OU=Systemas:hozYmartillo/CN=localhost" \
   -keyout /etc/ssl/certs/localhost.pem -out /etc/ssl/certs/localhost.pem

chmod 755 /etc/ssl/certs/localhost.pem

cat > /etc/lighttpd/mod_ssl.conf << EOF
server.modules += ("mod_openssl")
\$SERVER["socket"] == "0.0.0.0:443" {
    ssl.engine  = "enable"
    ssl.pemfile = "/etc/ssl/certs/localhost.pem"
    ssl.cipher-list = "ECDHE-RSA-AES256-SHA384:AES256-SHA256:RC4:HIGH:!MD5:!aNULL:!EDH:!AESGCM"
    ssl.honor-cipher-order = "enable"
}
\$HTTP["scheme"] == "http" {
    \$HTTP["host"] =~ ".*" {
        url.redirect = (".*" => "https://%0\$0")
    }
}
EOF

sed -i -r 's#\#.*mod_redirect.*,.*#    "mod_redirect",#g' /etc/lighttpd/lighttpd.conf

itawxrc="";itawxrc=$(grep 'include "mod_ssl.conf' /etc/lighttpd/lighttpd.conf);[[ "$itawxrc" != "" ]] && echo listo || \
sed -i -r 's#.*include "mime-types.conf".*#include "mime-types.conf"\ninclude "mod_ssl.conf"#g' /etc/lighttpd/lighttpd.conf

sed -i -r 's#ssl.pemfile.*=.*#ssl.pemfile   = "/etc/ssl/certs/localhost.pem"#g' /etc/lighttpd/lighttpd.conf

rc-service lighttpd restart

The PHP: installation and configurations

Next requirement is the PHP scripting Language. Because Cacti are build with PHP, it has support for LDAP.

Note: Cacti supports PHP5 and PHP7. In the next section, we will only cover PHP7 because that's only version available that works with recent Alpine versions. If you use an older Alpine host for testing, you can use this command to detect what to install export phpmax=$(debver=$(cat /etc/alpine-release|cut -d '.' -f1);[ $debver -ge 6 ] && echo 7|| echo 5), the shel var phpmax indicates based on Alpine version if 5 or 7 php will be used in command lines as: apk add php$phpmax.

The commit that mess is at, is: https://git.alpinelinux.org/aports/commit/community/cacti/cacti.php-fpm.conf?id=4272e802a1be191657becb739e6a248c1d0411a7 where a specific pool for php-fpm is made for cacti. It's a mess because it's not documented. We must avoid and ignore it if we are to properly configure the general pool:


apk add php7-fpm php7-bcmath php7-bz2 php7-ctype php7-curl php7-dom \
 php7-enchant php7-exif php7-gd php7-gettext php7-gmp php7-iconv \
 php7-imap php7-intl php7-json php7-mbstring php7-opcache php7-openssl \
 php7-phar php7-posix php7-pspell php7-recode php7-session php7-simplexml \
 php7-sockets php7-sysvmsg php7-sysvsem php7-sysvshm php7-tidy php7-tokenizer \
 php7-xml php7-xmlreader php7-xmlrpc php7-xmlwriter php7-xsl php7-zip php7-sqlite3 \
 php7-gd php7-gmp php7-ldap php7-openssl php7-pdo_mysql php7-posix php7-sockets php7-xml

apk add php7-pdo php7-pdo_mysql php7-mysqli php7-pdo_sqlite php7-sqlite3 \
 php7-odbc php7-pdo_odbc php7-dba

The following configurations are for high or huge loads on a 2G RAM server, for more information about configuring PHP on Alpine Linux see Production LAMP system: Lighttpd + PHP + MySQL wiki page.

sed -i -r 's|.*cgi.fix_pathinfo=.*|cgi.fix_pathinfo=1|g' /etc/php*/php.ini
sed -i -r 's#.*safe_mode =.*#safe_mode = Off#g' /etc/php*/php.ini
sed -i -r 's#.*expose_php =.*#expose_php = Off#g' /etc/php*/php.ini
sed -i -r 's#memory_limit =.*#memory_limit = 512M#g' /etc/php*/php.ini
sed -i -r 's#upload_max_filesize =.*#upload_max_filesize = 56M#g' /etc/php*/php.ini
sed -i -r 's#post_max_size =.*#post_max_size = 128M#g' /etc/php*/php.ini
sed -i -r 's#^file_uploads =.*#file_uploads = On#g' /etc/php*/php.ini
sed -i -r 's#^max_file_uploads =.*#max_file_uploads = 12#g' /etc/php*/php.ini
sed -i -r 's#^allow_url_fopen = .*#allow_url_fopen = On#g' /etc/php*/php.ini
sed -i -r 's#^.default_charset =.*#default_charset = "UTF-8"#g' /etc/php*/php.ini
sed -i -r 's#^.max_execution_time =.*#max_execution_time = 90#g' /etc/php*/php.ini
sed -i -r 's#^max_input_time =.*#max_input_time = 90#g' /etc/php*/php.ini
sed -i -r 's#.*date.timezone =.*#date.timezone = America/Panama#g' /etc/php*/php.ini

sed -i -r 's|.*events.mechanism =.*|events.mechanism = epoll|g' /etc/php*/php-fpm.conf
sed -i -r 's|.*emergency_restart_threshold =.*|emergency_restart_threshold = 12|g' /etc/php*/php-fpm.conf
sed -i -r 's|.*emergency_restart_interval =.*|emergency_restart_interval = 1m|g' /etc/php*/php-fpm.conf
sed -i -r 's|.*process_control_timeout =.*|process_control_timeout = 8s|g' /etc/php*/php-fpm.conf

sed -i -r 's|^.*pm.max_requests =.*|pm.max_requests = 10000|g' /etc/php*/php-fpm.d/www.conf
sed -i -r 's|^.*pm.max_children =.*|pm.max_children = 12|g' /etc/php*/php-fpm.d/www.conf
sed -i -r 's|^.*pm.start_servers =.*|pm.start_servers = 4|g' /etc/php*/php-fpm.d/www.conf
sed -i -r 's|^.*pm.min_spare_servers =.*|pm.min_spare_servers = 4|g' /etc/php*/php-fpm.d/www.conf
sed -i -r 's|^.*pm.max_spare_servers =.*|pm.max_spare_servers = 8|g' /etc/php*/php-fpm.d/www.conf
sed -i -r 's|^.*pm.process_idle_timeout =.*|pm.process_idle_timeout = 8s|g' /etc/php*/php-fpm.d/www.conf
sed -i -r 's|^.*pm =.*|pm = ondemand|g' /etc/php*/php-fpm.d/www.conf

mkdir -p /var/run/php-fpm7/

chown lighttpd:root /var/run/php-fpm7

sed -i -r 's|^.*listen =.*|listen = /run/php-fpm7/php7-fpm.sock|g' /etc/php*/php-fpm.d/www.conf
sed -i -r 's|^pid =.*|pid = /run/php-fpm7/php7-fpm.pid|g' /etc/php*/php-fpm.conf
sed -i -r 's#^user =.*#user = lighttpd#g' /etc/php*/php.ini
sed -i -r 's#^group =.*#group = lighttpd#g' /etc/php*/php.ini
sed -i -r 's|^.*listen.owner =.*|listen.owner = lighttpd|g' /etc/php*/php-fpm.d/www.conf
sed -i -r 's|^.*listen.group =.*|listen.group = lighttpd|g' /etc/php*/php-fpm.d/www.conf
sed -i -r 's|^.*listen.mode =.*|listen.mode = 0660|g' /etc/php*/php-fpm.d/www.conf

rc-update add php-fpm7 default

service php-fpm7 restart

After you have php ready, let's integrate it into the current preinstalled web server. We've chosen lighttpd, so the commands are:

mkdir -p /var/www/localhost/cgi-bin

sed -i -r 's#\#.*mod_alias.*,.*#    "mod_alias",#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#.*include "mod_cgi.conf".*#   include "mod_cgi.conf"#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#.*include "mod_fastcgi.conf".*#\#   include "mod_fastcgi.conf"#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#.*include "mod_fastcgi_fpm.conf".*#   include "mod_fastcgi_fpm.conf"#g' /etc/lighttpd/lighttpd.conf

cat > /etc/lighttpd/mod_fastcgi_fpm.conf << EOF
server.modules += ( "mod_fastcgi" )
index-file.names += ( "index.php" )
fastcgi.server = (
    ".php" => (
      "localhost" => (
        "socket"                => "/var/run/php-fpm7/php7-fpm.sock",
        "broken-scriptfilename" => "enable"
      ))
)
EOF

sed -i -r 's|^.*listen =.*|listen = /var/run/php-fpm7/php7-fpm.sock|g' /etc/php*/php-fpm.d/www.conf

sed -i -r 'php-fpm7 restart

rc-service lighttpd restart

echo "<?php echo phpinfo(); ?>" > /var/www/localhost/htdocs/info.php

To test PHP is working correctly, browse to http://ipaddress/info.php Change "ipaddrs" to the web server's ip address.

The Database: MariaDB installation and configuration

Warning: Cacti also can run with PostgreSQL, it's a better choice for heavily loaded production and huge data systems. We documented mysql only because postgresql needs complex tunning parameters


Note: You can install adminer to manage the database via a web browser. See Adminer in production LAMP systems that can manage any kind of database via a GUI
apk add mysql mysql-client tzdata

mysql_install_db --user=mysql --datadir=/var/lib/mysql

rc-service mariadb start

mysql_tzinfo_to_sql /usr/share/zoneinfo/ | mysql -u root mysql

sed -i "s|.*max_allowed_packet\s*=.*|max_allowed_packet = 100M|g" /etc/my.cnf.d/mariadb-server.cnf

sed -i "s|.*bind-address\s*=.*|bind-address=127.0.0.1|g" /etc/mysql/my.cnf
sed -i "s|.*bind-address\s*=.*|bind-address=127.0.0.1|g" /etc/my.cnf.d/mariadb-server.cnf

cat > /etc/my.cnf.d/mariadb-server-default-charset.cnf << EOF
[client]
default-character-set = utf8mb4

[mysql]
default-character-set = utf8mb4
EOF

cat > /etc/my.cnf.d/mariadb-server-default-highload.cnf << EOF
[mysqld]
collation_server = utf8mb4_unicode_ci
character_set_server = utf8mb4
max_heap_table_size = 32M
tmp_table_size      = 32M
join_buffer_size    = 62M
innodb_file_format  = Barracuda
innodb_large_prefix = 1
innodb_buffer_pool_size = 512M
innodb_flush_log_at_timeout = 3
innodb_read_io_threads  = 32
innodb_buffer_pool_instances = 1
innodb_io_capacity     = 5000
innodb_io_capacity_max = 10000
EOF

rc-service mariadb restart

rc-update add mariadb default

After those commands run the mysql_secure_installation script, and answer as follows:

  1. Enter current password for root (for none, enter): it must be provided because we've set it previously. Correct response is OK, successfully used password, moving on...
  2. Switch to unix_socket authentication [Y/n] Not used. Must be disabled, answer NO, the response will be ... skipping.
  3. Change the root password? [Y/n] Press "n" only if you provided a good password, otherwise change it!
  4. Remove anonymous users? [Y/n] In a production system, we must remove them, so answer Y the correct response is ... Success!.
  5. Disallow root login remotely? [Y/n] Answer Y proper response is ... Success!.
  6. Remove test database and access to it? [Y/n] You should removed it, so answer Y the proper response is ... Success!.
  7. Reload privilege tables now? [Y/n] Aanswer Y proper response is ... Success!.

After you respond to all of the questions, restart the service with rc-service mariadb restart

The tools: net-snmp and rrdtool

Warning: do no set agentAddress tcp:161,tcp6:[::1]:161, by default the package adds the udp 161 protocol, so if you set it, it will only listen and show info using ipv6 only


apk add net-snmp net-snmp-tools rrdtool

cat > /etc/snmp/snmpd.conf << EOF
view systemonly included .1.3.6.1.2.1.1
view systemonly included .1.3.6.1.2.1.25.1
rocommunity  public localhost
rocommunity  public default -V systemonly
sysLocation    Bolivar Upata Venezuela
sysContact     infoadmin <info@pacificnetwork.com>
sysServices    72
EOF

rc-update add snmpd default

rc-service snmpd restart

Here we need only the commands for cacti. For more info about the topic see:

Cacti Installation

As of Alpine 3.12, Cacti still is in the edge branch, so first we pre-install the dependency packages. Afterward, from edge, we install only cacti.

Installing Cacti Packages

Warning: As of Alpine 3.5, Cacti was a only one package, i.e. "cacti". Beginning with Alpine 3.6, The cacti package is split into more than obe package. The commit that mess all is where a specific pool for php-fpm is made for cacti. It's a mess because it's not documented. We must avoid and ignore it if we are to properly configure the general pool:


cat > /etc/apk/repositories << EOF
http://dl-cdn.alpinelinux.org/alpine/v$(cat /etc/alpine-release | cut -d'.' -f1,2)/main
http://dl-cdn.alpinelinux.org/alpine/v$(cat /etc/alpine-release | cut -d'.' -f1,2)/community
EOF

apk update

apk add bash busybox coreutils net-snmp-tools perl rrdtool ttf-dejavu php7-snmp

apk add cacti cacti-setup cacti-php7 cacti-lang

Cacti pre Configuration

Cacti is run under the cacti user. We temporally set the file permissions to world writeable, then later, we'll set them correctly.

cat > /etc/lighttpd/mod_cacti.conf << EOF
alias.url += (
     "/cacti/"	    =>    "/usr/share/webapps/cacti/"
)
\$HTTP["url"] =~ "^/cacti/" {
    dir-listing.activate = "disable"
}
EOF

sed -i -r 's#\#.*mod_alias.*,.*#    "mod_alias",#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#\#.*mod_accesslog.*,.*#    "mod_accesslog",#g' /etc/lighttpd/lighttpd.conf
sed -i -r 's#\#.*mod_setenv.*,.*#    "mod_setenv",#g' /etc/lighttpd/lighttpd.conf

sed -i -r 's#.*include "mod_cgi.conf".*#   include "mod_cgi.conf"#g' /etc/lighttpd/lighttpd.conf

checkssl="";checkssl=$(grep 'include "mod_cacti.conf' /etc/lighttpd/lighttpd.conf);[[ "$checkssl" != "" ]] && echo listo || sed -i -r 's#.*include "mod_cgi.conf".*#include "mod_cgi.conf"\ninclude "mod_cacti.conf"#g' /etc/lighttpd/lighttpd.conf

rc-service lighttpd restart

Cacti runs under the cacti user, but web server user (apache2, lighttpd) also needs access. So enable group access and as we said, temporally set world-writeable file permissions permissions:

  1. grant temporary access to the web server
  2. Create the cacti database and populate it
  3. Grant Cacti MySQL user access (give it a more secure password):
  4. Quit from Mysql command prompt:
  5. Import the initial Cacti MySQL database
  6. set the user, password, and database name to the cacti config file
  7. temporarily grant world-write permission to the cacti log and lib directories
chown -R cacti:lighttpd /usr/share/webapps/cacti/;chown -R cacti:lighttpd /var/lib/cacti/

mysql -u root -p -e "CREATE DATABASE cacti;"

mysql -u root -p -e "GRANT ALL ON cacti.* TO 'cactiuser'@'localhost' IDENTIFIED BY 'cactipassword';FLUSH PRIVILEGES;

mysql -u root -p -e "GRANT GRANT OPTION ON cacti.* TO 'cactiuser'@'localhost';FLUSH PRIVILEGES;"

mysql -u root -p -e "GRANT SELECT ON mysql.time_zone_name TO 'cactiuser'@'localhost';"

mysql --user=cactiuser -p cactipassword cacti < /usr/share/webapps/cacti/cacti.sql

sed -i -r 's#\$database_default.*=.*;#\$database_default  = 'cacti';#g' /etc/cacti/config.php
sed -i -r 's#\$database_username.*=.*;#\$database_username  = 'cactiuser';#g' /etc/cacti/config.php
sed -i -r 's#\$database_password.*=.*;#\$database_password  = 'cactipassword';#g' /etc/cacti/config.php

chmod 777 /var/log/cacti
chmod 666 /var/log/cacti/*.log

Cacti web setup install

Login using:

Password= admin user= admin

Next will be prompted to change password:

change password.

In the web page click:

-> Next

Then select new install if+ it's not selected:

-> New install, Next
Warning: take note since cacti 1.2.8 and still at cacti 1.2.10, installer have several errors for Cacti_Stats.xml.gz template, so last "check" has no description. You must uncheck last as described here: https://github.com/Cacti/cacti/issues/3313#issuecomment-594114681 Th template can be installed later via the cli as: php -d max_execution_time=90 /usr/share/webapps/cacti/cli/import_package.php --filename=Cacti_Stats.xml.gz under the templates directory of the cacti install, but currently it hangs and never gets installed. Reported at https://github.com/Cacti/cacti/issues/3313#issuecomment-601508135


Then finish

-> Finish

Add to crontab:

Cacti post configuration

chmod 775 /var/log/cacti
chmod 664 /var/log/cacti/*.log

Pooler and crontab

As we said, cacti needs a crontab for pool collection of data! These steps are not necesary as of Alpine 3.7 because the cacti package installs all necesary files.

Note: These steps are only for older cacti packages up to Alpine version 3.6. Starting with version 3.7, cacti packages install a crontab for data collection
cd /etc/crontabs
vi root

copy to the end of the file:

*/5 * * * * lighttpd php /var/www/localhost/htdocs/cacti/poller.php > /dev/null 2>&1

In case you are using another web server, you have to modify the "lighttpd" user.

*/5 * * * * "web server user" php /var/www/localhost/htdocs/cacti/poller.php > /dev/null 2>&1

Add your devices and you're ready to start monitoring!

cacti plugins

If you used the latest cacti, you must use the latest development version of each plugin especially if you're using php7 on your webserver:

00

cd /usr/share/webapps/cacti/plugins/

wget https://github.com/Cacti/plugin_mikrotik/archive/master.tar.gz -O cacti-1.2.11-plugin-monitor.tar.gz
wget https://github.com/Cacti/plugin_gexport/archive/master.tar.gz -O cacti-1.2.11-plugin-gexport.tar.gz
wget https://github.com/Cacti/plugin_routerconfigs/archive/master.tar.gz -O cacti-1.2.11-plugin-routerconfigs.tar.g
wget https://github.com/Cacti/plugin_monitor/archive/master.tar.gz cacti-1.2.11-plugin-reportit.tar.gz
wget https://github.com/Cacti/plugin_reportit/archive/master.tar.gz -O cacti-1.2.11-plugin-reportit.tar.gz

After extract all of the files, change and fix permissions:

cd /usr/share/webapps/cacti/plugins/

chown -R cacti:lighttpd /usr/share/webapps/cacti/

chown -R cacti:lighttpd /var/lib/cacti/

Go to cacti configuration and plugins via the web interface to install and enable all of them.

Re-installing Cacti

Let's suppose you make a mess of everything and want to reinstall all of it from the beginning. Let's get started:

Erase everything cacti related

  1. remove istalled packages
  2. remove configuration files
  3. remove databases and users from mysql/postgresql (here only mysql for example)
  4. reconfigure to not load the cacti web server configuration
  5. restart services because the cacti pool was erased and lighttpd must reload its config files
apk del cacti cacti-setup cacti-php7 cacti-lang

rm -rf /var/log/cacti

rm -rf /usr/share/webapps/cacti

rm -rf /etc/cacti

mysql -u root -p -e "DROP DATABASE cacti;"

mysql -u root -p -e "DROP USER 'cactiuser'@'localhost'"

sed -i "/include \"mod_cacti.conf\"/d" /etc/lighttpd/lighttpd.conf

rc-service php-fpm7 restart

rc-service lighttpd restart

After you complete all of these steps, repeat all the steps from Cacti_Installation section.

See Also