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Move resource monitoring from notes to docs

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KemoNine 2020-08-01 00:23:36 +00:00
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1
docs/README.md
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@ -19,3 +19,4 @@ Items marked ```REQUIRED``` are assumed to be setup and working. You've been war
* [Additional Networking Setup (REQUIRED)](cockpit.md)
* [Web Dashboard / Landing Page](landing_page.md)
* [System Monitoring (REQUIRED)](monit.md)
* [Resource Monitoring](munin.md)

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docs/munin.md Normal file
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# Resource Monitoring
The below commands will setup ```munin``` for monitoring resource utilization on your PiFrame. This is wholly optional but can provide insights if your PiFrame is exhibiting odd behavior.
## Important Notes
* This setup will deploy a *dedicated instance* of ```lighttpd``` to handle access to the ```munin``` data. Given how lean ```lighttpd``` is on resources, this saves many hassles with virtual hosts and the like.
* This setup uses cgi to generate ```munin``` graphs. The Raspberry Pi cpu can take awhile to generate graphs. Please be patient. This approach was chosen to keep ```munin``` from consuming resource generating graphs every time it collects statistics. This also helps prevent excessive disk writes to the micro sd card extending its life.
## Setup
``` sh
pacman -S munin perl-cgi-fast
nano -w /etc/munin/munin.conf
graph_strategy cgi
html_strategy cron
[piframe]
address 127.0.0.1
use_node_name yes
chown munin: /var/lib/munin/cgi-tmp
chown munin: -R /usr/share/munin/www
munin-node-configure --shell # activate useful plugins
sudo -sHu munin munin-cron # prime munin data
systemctl enable --now munin-node
crontab /etc/munin/munin-cron-entry -u munin
cat > /etc/lighttpd/lighttpd-munin.conf <<EOF
# Apply the following tweaks to the /etc/munin/munin.conf file ahead of running lighttpd for munin
## Use cgi rendering for graph and html
#graph_strategy cgi
#html_strategy cron
server.username = "munin"
server.groupname = "munin"
server.document-root = "/srv/http"
server.port = 2813
server.errorlog = "/var/log/munin/lighttpd-error.log"
dir-listing.activate = "disable"
server.modules = (
"mod_access",
"mod_accesslog",
"mod_alias",
"mod_rewrite",
"mod_redirect",
"mod_cgi",
"mod_fastcgi",
)
server.follow-symlink = "enable"
index-file.names = ( "index.html", "index.htm" )
url.redirect += ( "^/*$" => "/munin/" )
\$HTTP["url"] =~ "/munin-cgi/munin-cgi-graph" {
alias.url += ( "/munin-cgi/munin-cgi-graph" => "/usr/share/munin/cgi/munin-cgi-graph" )
cgi.assign = ( "" => "" )
}
#alias.url += ( "/munin/static" => "/etc/munin/static" )
alias.url += ( "/munin" => "/usr/share/munin/www" )
mimetype.assign = (
".html" => "text/html",
".txt" => "text/plain",
".css" => "text/css",
".js" => "application/x-javascript",
".jpg" => "image/jpeg",
".jpeg" => "image/jpeg",
".gif" => "image/gif",
".png" => "image/png",
"" => "application/octet-stream"
)
EOF
cat > /etc/systemd/system/lighttpd-munin.service <<EOF
[Unit]
Description=Lighttpd Web Server (munin)
After=syslog.target network.target
[Service]
PrivateTmp=true
ExecStart=/usr/bin/lighttpd-angel -D -f /etc/lighttpd/lighttpd-munin.conf
ExecReload=/bin/kill -HUP $MAINPID
KillSignal=SIGINT
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable --now lighttpd-munin
firewall-cmd --zone=public --permanent --add-port=2813/tcp
firewall-cmd --reload
```

84
notes.txt
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@ -1,87 +1,3 @@
########################################
# system _resource_ monitoring
########################################
pacman -S munin perl-cgi-fast
nano -w /etc/munin/munin.conf
graph_strategy cgi
html_strategy cron
[piframe]
address 127.0.0.1
use_node_name yes
chown munin: /var/lib/munin/cgi-tmp
chown munin: -R /usr/share/munin/www
munin-node-configure --shell # activate useful plugins
sudo -sHu munin munin-cron # prime munin data
systemctl enable --now munin-node
crontab /etc/munin/munin-cron-entry -u munin
cat > /etc/lighttpd/lighttpd-munin.conf <<EOF
# Apply the following tweaks to the /etc/munin/munin.conf file ahead of running lighttpd for munin
## Use cgi rendering for graph and html
#graph_strategy cgi
#html_strategy cron
server.username = "munin"
server.groupname = "munin"
server.document-root = "/srv/http"
server.port = 2813
server.errorlog = "/var/log/munin/lighttpd-error.log"
dir-listing.activate = "disable"
server.modules = (
"mod_access",
"mod_accesslog",
"mod_alias",
"mod_rewrite",
"mod_redirect",
"mod_cgi",
"mod_fastcgi",
)
server.follow-symlink = "enable"
index-file.names = ( "index.html", "index.htm" )
url.redirect += ( "^/*$" => "/munin/" )
\$HTTP["url"] =~ "/munin-cgi/munin-cgi-graph" {
alias.url += ( "/munin-cgi/munin-cgi-graph" => "/usr/share/munin/cgi/munin-cgi-graph" )
cgi.assign = ( "" => "" )
}
#alias.url += ( "/munin/static" => "/etc/munin/static" )
alias.url += ( "/munin" => "/usr/share/munin/www" )
mimetype.assign = (
".html" => "text/html",
".txt" => "text/plain",
".css" => "text/css",
".js" => "application/x-javascript",
".jpg" => "image/jpeg",
".jpeg" => "image/jpeg",
".gif" => "image/gif",
".png" => "image/png",
"" => "application/octet-stream"
)
EOF
cat > /etc/systemd/system/lighttpd-munin.service <<EOF
[Unit]
Description=Lighttpd Web Server (munin)
After=syslog.target network.target
[Service]
PrivateTmp=true
ExecStart=/usr/bin/lighttpd-angel -D -f /etc/lighttpd/lighttpd-munin.conf
ExecReload=/bin/kill -HUP $MAINPID
KillSignal=SIGINT
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable --now lighttpd-munin
firewall-cmd --zone=public --permanent --add-port=2813/tcp
firewall-cmd --reload
########################################
# syncthing / rclone / web based file browser
########################################