From 5f4601f61123dda84f26b6e45fe12cd17749e918 Mon Sep 17 00:00:00 2001
From: Victor LABORIE <vlaborie@evolix.fr>
Date: Thu, 20 Sep 2018 10:21:49 +0200
Subject: [PATCH] nagios-nrpe: add check_redis_instances

---
 CHANGELOG.md                                  |  1 +
 .../files/plugins/check_redis_instances       | 49 +++++++++++++++++++
 nagios-nrpe/templates/evolix.cfg.j2           |  1 +
 3 files changed, 51 insertions(+)
 create mode 100755 nagios-nrpe/files/plugins/check_redis_instances

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 54ac7ed5..341ed6d6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ The **patch** part changes incrementally at each release.
 * networkd-to-ifconfig: add a role to switch from networkd to ifconfig
 * webapps/evoadmin-web: add users to /etc/aliases
 * redis: add support for multi instances
+* nagios-nrpe: add check_redis_instances
 
 ### Changed
 * dovecot: stronger TLS configuration
diff --git a/nagios-nrpe/files/plugins/check_redis_instances b/nagios-nrpe/files/plugins/check_redis_instances
new file mode 100755
index 00000000..829cd81e
--- /dev/null
+++ b/nagios-nrpe/files/plugins/check_redis_instances
@@ -0,0 +1,49 @@
+#!/bin/sh
+
+set -u
+
+return=0
+nb_crit=0
+nb_warn=0
+nb_ok=0
+nb_unchk=0
+output=""
+
+instances=$(ls /etc/redis/redis-*.conf)
+for instance in ${instances}; do
+    name=$(basename "${instance}"| sed '{s/redis-//;s/.conf//}')
+    port=$(grep "port" "${instance}"|grep -oE "[0-9]*")
+    if [ -h "/etc/systemd/system/multi-user.target.wants/redis-server@${name}.service" ]; then
+        /usr/lib/nagios/plugins/check_tcp -p "${port}" >/dev/null 2>&1
+        ret="${?}"
+        if [ "${ret}" -ge 2 ]; then
+            nb_crit=$((nb_crit + 1))
+            output="${output}CRITICAL - ${name} (${port})\n"
+            [ "${return}" -le 2 ] && return=2
+        elif [ "${ret}" -ge 1 ]; then
+            nb_warn=$((nb_warn + 1))
+            output="${output}WARNING - ${name} (${port})\n"
+            [ "${return}" -le 1 ] && return=1
+        else
+            nb_ok=$((nb_ok + 1))
+            output="${output}OK - ${name} (${port})\n"
+            [ "${return}" -le 0 ] && return=0
+        fi
+    else
+        nb_unchk=$((nb_unchk + 1))
+        output="${output}UNCHK - ${name} (${port})\n"
+    fi
+done
+
+[ "${return}" -ge 0 ] && header="OK"
+[ "${return}" -ge 1 ] && header="WARNING"
+[ "${return}" -ge 2 ] && header="CRITICAL"
+
+printf "%s - %s UNCHK / %s CRIT / %s WARN / %s OK\n\n" "${header}" "${nb_unchk}" "${nb_crit}" "${nb_warn}" "${nb_ok}"
+
+printf "${output}" | grep -E "^CRITICAL"
+printf "${output}" | grep -E "^WARNING"
+printf "${output}" | grep -E "^OK"
+printf "${output}" | grep -E "^UNCHK"
+
+exit "${return}"
diff --git a/nagios-nrpe/templates/evolix.cfg.j2 b/nagios-nrpe/templates/evolix.cfg.j2
index 845bae33..bab8b681 100644
--- a/nagios-nrpe/templates/evolix.cfg.j2
+++ b/nagios-nrpe/templates/evolix.cfg.j2
@@ -68,6 +68,7 @@ command[check_supervisord_status]={{ nagios_plugins_directory }}/check_superviso
 command[check_varnish]={{ nagios_plugins_directory }}/check_varnish_health -i 127.0.0.1 -p 6082 -s /etc/varnish/secret -w 2 -c 4
 command[check_haproxy]={{ nagios_plugins_directory }}/check_haproxy_stats -s /var/run/haproxy.sock -w 80 -c 90
 command[check_minifirewall]=sudo {{ nagios_plugins_directory }}/check_minifirewall
+command[check_redis_instances]={{ nagios_plugins_directory }}/check_redis_instances
 
 # Check HTTP "many". Use this to check many websites (http, https, ports, sockets and SSL certificates).
 # Beware! All checks must not take more than 10s!