[PATCH v4 6/6] zabbix_agentd: Add IPFire specific userparameters

[Robin Roevens <robin.roevens@disroot.org>]

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Provide IPFire specific items for the Zabbix server to monitor:
- ipfire.net.gateway.pingtime: Internet Line Quality
- ipfire.net.gateway.ping: Internet connection
- ipfire.net.fw.hits.raw: JSON formatted list of Firewall hits/chain
- ipfire.dhcpd.clients: Number of active DHCP leases
- ipfire.captive.clients: Number of Captive Portal clients

Signed-off-by: Robin Roevens <robin.roevens(a)disroot.org>
---
 config/rootfiles/packages/zabbix_agentd        |  1 +
 config/zabbix_agentd/sudoers                   |  2 +-
 config/zabbix_agentd/userparameter_ipfire.conf | 12 ++++++++++++
 lfs/zabbix_agentd                              |  5 ++++-
 4 files changed, 18 insertions(+), 2 deletions(-)
 create mode 100644 config/zabbix_agentd/userparameter_ipfire.conf

diff --git a/config/rootfiles/packages/zabbix_agentd b/config/rootfiles/packages/zabbix_agentd
index 2ea98fc21..2ae4e24cb 100644
--- a/config/rootfiles/packages/zabbix_agentd
+++ b/config/rootfiles/packages/zabbix_agentd
@@ -19,4 +19,5 @@ var/ipfire/zabbix_agentd
 var/ipfire/zabbix_agentd/zabbix_agentd_ipfire_mandatory.conf
 var/ipfire/zabbix_agentd/userparameters
 var/ipfire/zabbix_agentd/userparameters/userparameter_pakfire.conf
+var/ipfire/zabbix_agentd/userparameters/userparameter_ipfire.conf
 #var/log/zabbix
diff --git a/config/zabbix_agentd/sudoers b/config/zabbix_agentd/sudoers
index cb4263ff6..2d71ae78f 100644
--- a/config/zabbix_agentd/sudoers
+++ b/config/zabbix_agentd/sudoers
@@ -8,4 +8,4 @@
 # To add more sudo rights to zabbix agent, you should modify the sudoers file zabbix_agentd_user
 #
 Defaults:zabbix !requiretty
-zabbix ALL=(ALL) NOPASSWD: /opt/pakfire/pakfire status
+zabbix ALL=(ALL) NOPASSWD: /opt/pakfire/pakfire status, /usr/sbin/fping, /usr/local/bin/getipstat
diff --git a/config/zabbix_agentd/userparameter_ipfire.conf b/config/zabbix_agentd/userparameter_ipfire.conf
new file mode 100644
index 000000000..10c09c25d
--- /dev/null
+++ b/config/zabbix_agentd/userparameter_ipfire.conf
@@ -0,0 +1,12 @@
+# Parameters for monitoring IPFire specific metrics
+#
+# Internet Gateway ping timings, can be used to measure "Internet Line Quality"
+UserParameter=ipfire.net.gateway.pingtime,sudo /usr/sbin/fping -c 3 gateway 2>&1 | tail -n 1 | awk '{print $NF}' | cut -d '/' -f2
+# Internet Gateway availability, can be used to check Internet connection
+UserParameter=ipfire.net.gateway.ping,sudo /usr/sbin/fping -q -r 3 gateway; [ ! $? ]; echo $?
+# Firewall Filter Forward chain drops in bytes/chain (JSON), can be used for discovery of firewall chains and monitoring of firewall hits on each chain
+UserParameter=ipfire.net.fw.hits.raw,sudo /usr/local/bin/getipstat -xf | grep "\/\* DROP_.* \*\/$" | awk 'BEGIN { ORS = ""; print "["} { printf "%s{\"chain\": \"%s\", \"bytes\": \"%s\"}", separator, substr($11, 6), $2; separator = ", "; } END { print"]" }'
+# Number of currently Active DHCP leases
+UserParameter=ipfire.dhcpd.clients,grep -s -E 'lease|bind' /var/state/dhcp/dhcpd.leases | sed ':a;/{$/{N;s/\n//;ba}' | grep "state active" | wc -l
+# Number of Captive Portal clients
+UserParameter=ipfire.captive.clients,awk -F ',' 'length($2) == 17 {sum += 1} END {if (length(sum) == 0) print 0; else print sum}' /var/ipfire/captive/clients
\ No newline at end of file
diff --git a/lfs/zabbix_agentd b/lfs/zabbix_agentd
index 929d36628..226eb6253 100644
--- a/lfs/zabbix_agentd
+++ b/lfs/zabbix_agentd
@@ -35,7 +35,8 @@ DIR_APP    = $(DIR_SRC)/$(THISAPP)
 TARGET     = $(DIR_INFO)/$(THISAPP)
 PROG       = zabbix_agentd
 PAK_VER    = 5
-DEPS       =
+
+DEPS       = fping
 
 SERVICES   = zabbix_agentd
 
@@ -107,6 +108,8 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
 		/var/ipfire/zabbix_agentd/zabbix_agentd_ipfire_mandatory.conf
 	install -v -m 644 $(DIR_SRC)/config/zabbix_agentd/userparameter_pakfire.conf \
 		/var/ipfire/zabbix_agentd/userparameters/userparameter_pakfire.conf
+	install -v -m 644 $(DIR_SRC)/config/zabbix_agentd/userparameter_ipfire.conf \
+		/var/ipfire/zabbix_agentd/userparameters/userparameter_ipfire.conf
 
 	# Create directory for additional agent modules
 	-mkdir -pv /usr/lib/zabbix
-- 
2.34.1


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