fix retrieval of not running conatiners

check_docker.sh

@@ -48,11 +48,11 @@ while [[ $# -gt 0 ]]; do
 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`
+all_containers=`sudo /usr/bin/docker ps --format '{{.Names}}' --filter "name=${filter}" --no-trunc --quiet --all`
+running_containers=`sudo /usr/bin/docker ps --format '{{.Names}}' --filter "name=${filter}" --no-trunc --quiet`
+running_containers_stats=`sudo /usr/bin/docker stats --format '{{.Name}}:{{.CPUPerc}}:{{.MemPerc}}' --no-stream`
 
-not_running_containers=`comm -23 <(echo $all_containers) <(echo $running_containers)`
+not_running_containers=`comm -23 <(echo $all_containers | /usr/bin/tr ' ' '\n') <(echo $running_containers | /usr/bin/tr ' ' '\n')`
 
 # Format data.
 output=''
@@ -72,10 +72,10 @@ 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=`/usr/bin/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)`
+    cpu=`/usr/bin/awk -F ':' '{print +$2}' <(echo $container_stats)`
+    mem=`/usr/bin/awk -F ':' '{print +$3}' <(echo $container_stats)`
 
     status='OK'
     [[ ${cpu%.*} -ge $cpu_threshold_warning ]] && status='WARNING'