Add quick MOTD for docker containers

playbooks/pimp.yml

@@ -81,6 +81,8 @@
         motd_watch_services_extra:
           - docker
           - isc-dhcp-server
+        motd_watch_containers_extra:
+          - unbound
       tags: [ pis, mp, motd ]
 # And also serving DHCP
 - hosts: pi-mp-1.desu.ltd

roles/motd/defaults/main.yml

@@ -22,3 +22,7 @@ motd_watch_services:
   - ansible-pull
   - backup
 motd_watch_services_extra: []
+# Docker images to look for. Matches a simple glob (*{{ item }}*)
+# If Docker is not running, this section will be omitted
+motd_watch_containers: []
+motd_watch_containers_extra: []

roles/motd/templates/motd.sh

@@ -13,6 +13,11 @@ declare -a services
 services+=("{{ item }}")
 {% endfor %}
 
+declare -a containers
+{% for item in (motd_watch_containers + motd_watch_containers_extra)|sort %}
+containers+=("{{ item }}")
+{% endfor %}
+
 ## Now, we actually put this info to use
 # Starting with services
 if [ -n "${services[*]}" ]; then
@@ -43,6 +48,24 @@ if [ -n "${services[*]}" ]; then
 	done
 fi
 
+# Containers, if docker is running
+if [ -n "${containers[*]}" ] && systemctl -q is-active docker; then
+	printf "\e[1mContainer Statuses\e[0m\n"
+	len=20
+	for container in "${containers[@]}"; do
+		status="\e[33mUnknown\e[0m"
+		image="$(docker ps | tail -n +2 | awk '{print $2}' | grep -ie "$container")"
+		if [ -n "$image" ]; then
+			status="\e[1;32mRunning\e[0m - $image"
+		fi
+		if [ -z "$image" ]; then
+			status="\e[1;31mNot Running\e[0m"
+		fi
+		printf " * \e[37m%-${len}.${len}s\e[0m - $status " "$container"
+		printf "\n"
+	done
+fi
+
 ## And some generic system status stuff
 printf "\e[1mSystem Status\e[0m\n"
 if [ -f /var/run/reboot-required ]; then