From 460bbf010624c8bcd5226f9220ade838f3cd96d4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Th=C3=A9o?= <theo@le-filament.com>
Date: Mon, 9 May 2022 14:43:25 +0200
Subject: [PATCH] add check_docker shell script
---
check_docker.sh | 103 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 103 insertions(+)
create mode 100755 check_docker.sh
diff --git a/check_docker.sh b/check_docker.sh
new file mode 100755
index 0000000..51ad6a6
--- /dev/null
+++ b/check_docker.sh
@@ -0,0 +1,103 @@
+#!/bin/bash
+
+# Default threshold values.
+cpu_threshold_warning=25
+cpu_threshold_critical=50
+mem_threshold_warning=50
+mem_threshold_critical=75
+filter=''
+
+print_help() {
+ echo "usage: ${0} [OPTIONS]"
+ echo "options:"
+ echo -e " -c, --cpu <warning:critical>\t\tthreshold values for cpu usage"
+ echo -e " -f, --filter <regex>\t\t\tcontainers to check"
+ echo -e " -h, --help\t\t\t\tprint this help"
+ echo -e " -m, --memory <warning:critical>\tthreshold values for memory usage"
+}
+
+while [[ $# -gt 0 ]]; do
+ case "$1" in
+ -c|--cpu)
+ cpu_threshold_warning=`awk -F ':' '{print +$1}' <(echo $2)`
+ cpu_threshold_critical=`awk -F ':' '{print +$2}' <(echo $2)`
+ shift 2
+ ;;
+
+ -f|--filter)
+ filter=$2
+ shift 2
+ ;;
+
+ -m|--memory)
+ mem_threshold_warning=`awk -F ':' '{print +$1}' <(echo $2)`
+ mem_threshold_critical=`awk -F ':' '{print +$2}' <(echo $2)`
+ shift 2
+ ;;
+
+ --help|-h)
+ print_help
+ exit 0
+ ;;
+
+ *)
+ echo "Error while parsing argument '$1'."
+ exit 1
+ ;;
+ esac
+done
+
+# Gathering facts.
+all_containers=`sudo docker ps --format '{{.Names}}' --filter "name=${filter}" --no-trunc --quiet --all`
+running_containers=`sudo docker ps --format '{{.Names}}' --filter "name=${filter}" --no-trunc --quiet`
+running_containers_stats=`sudo docker stats --format '{{.Name}}:{{.CPUPerc}}:{{.MemPerc}}' --no-stream`
+
+not_running_containers=`comm -23 <(echo $all_containers) <(echo $running_containers)`
+
+# Format data.
+output=''
+perf=''
+
+cpu_scale=";${cpu_threshold_warning};${cpu_threshold_critical};0;100"
+mem_scale=";${mem_threshold_warning};${mem_threshold_critical};0;100"
+
+# Running containers.
+for container in ${running_containers}; do
+ output+=" OK: ${container} status is running"
+done
+# Not running containers.
+for container in ${not_running_containers}; do
+ output+=" NOK: ${container} status is not running"
+done
+
+# CPU and memory statistics for running containers.
+for container_stats in ${running_containers_stats}; do
+ name=`awk -F ':' '{print $1}' <(echo $container_stats)`
+ [[ ! $name =~ ${filter} ]] && continue
+ cpu=`awk -F ':' '{print +$2}' <(echo $container_stats)`
+ mem=`awk -F ':' '{print +$3}' <(echo $container_stats)`
+
+ status='OK'
+ [[ ${cpu%.*} -ge $cpu_threshold_warning ]] && status='WARNING'
+ [[ ${cpu%.*} -ge $cpu_threshold_critical ]] && status='CRITICAL'
+ output+=" ${status}: ${name} cpu is ${cpu}%"
+
+ status='OK'
+ [[ ${mem%.*} -ge $mem_threshold_warning ]] && status='WARNING'
+ [[ ${mem%.*} -ge $mem_threshold_critical ]] && status='CRITICAL'
+ output+=" ${status}: ${name} memory is ${mem}%"
+
+ perf+=" ${name}_cpu=${cpu}%${cpu_scale}"
+ perf+=" ${name}_mem=${mem}%${mem_scale}"
+done
+
+# Nagios OK status.
+exit_code=0
+# Nagios WARNING status.
+grep --quiet 'WARNING:' <(echo $output) && exit_code=1
+# Nagios CRITICAL status.
+grep --quiet 'NOK:\|CRITICAL:' <(echo $output) && exit_code=2
+
+# Plugin output.
+echo "${output#' '}|${perf#' '}"
+exit $exit_code
--
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