Merge pull request 'Rebuild our Dashboard on hobbes' (#295) from hobbes-rebuild into master

Reviewed-on: Netz39_Admin/netz39-infra-ansible#295
Reviewed-by: dkdent <dkdent@netz39.de>

files/hobbes/grafana-kiosk.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=Grafana Kiosk
+After=network.target
+Wants=network.target
+
+[Service]
+User=root
+
+ExecStart=/usr/local/bin/kiosk.sh
+
+Restart=always
+
+PIDFile=/run/kiosk.pid
+ExecStop=/bin/kill -s SIGTERM $MAINPID
+
+[Install]
+WantedBy=multi-user.target

host-hobbes.yml

@@ -8,7 +8,6 @@
 
   roles:
 
-
   tasks:
     - name: Install packages needed for the system
       # This is a list of all packages,
@@ -16,15 +15,9 @@
       ansible.builtin.apt:
         state: present
         name:
-          # This is needed for the user-executed tasks
+          - mosquitto-clients
-          - acl
+          - fbi
-          # Regular packages
+
-          - lightdm
-          - accountsservice
-          - unclutter
-          - lxde
-          - chromium-browser
-          - rng-tools
 
     - name: Remove the screensavers
       ansible.builtin.apt:
@@ -53,50 +46,23 @@
 
 
     ### Kiosk setup
-    #
-    # https://github.com/grafana/grafana-kiosk
-
     - name: Ensure kiosk user is there
       ansible.builtin.user:
         name: "{{ kiosk_user }}"
         groups: audio,plugdev,input,netdev
         append: yes
 
-
+    - name: Install Kiosk script
-    - name: Create bin directory
+      ansible.builtin.template:
-      file:
+        src: templates/hobbes/kiosk.sh.j2
-        path: "/home/{{ kiosk_user }}/bin"
+        dest: /usr/local/bin/kiosk.sh
-        owner: "{{ kiosk_user }}"
+        owner: root
+        group: root
         mode: '0755'
-        state: directory
-
-    - name: Download grafana-kiosk
-      ansible.builtin.get_url:
-        url: "https://github.com/grafana/grafana-kiosk/releases/download/{{ kiosk_software_version }}/grafana-kiosk.linux.{{ kiosk_software_arch }}"
-        dest: "/home/{{ kiosk_user }}/bin/grafana-kiosk"
-        mode: '0755'
-        force: no
-
-
-    - name: Setup autologin in lightdm
-      ansible.builtin.blockinfile:
-        path: /etc/lightdm/lightdm.conf
-        block: |
-          [Seat:seat0]
-          autologin-user = pi
-          autologin-user-timeout = 0
-          autologin-in-background = False
-
-    - name: Remove autostart
-      # None of the things in autostart are needed or wanted
-      ansible.builtin.file:
-        path: /etc/xdg/lxsession/LXDE/autostart
-        state: absent
-
 
     - name: Add systemd service
-      ansible.builtin.template:
+      ansible.builtin.copy:
-        src: templates/hobbes/grafana-kiosk.service.j2
+        src: files/hobbes/grafana-kiosk.service
         dest: /etc/systemd/system/grafana-kiosk.service
         owner: root
         group: root
@@ -108,12 +74,4 @@
         enabled: true
         state: started
 
-    - name: Set default systemd target to graphical
-      ansible.builtin.file:
-        src: /lib/systemd/system/graphical.target
-        dest: /etc/systemd/system/default.target
-        state: link
-        force: yes
-
-
   handlers:

host-radon.yml

@@ -209,6 +209,22 @@
       tags:
         - labelprinter
 
+    - name: Setup docker container for Grafana Screenshots
+      docker_container:
+        name: grafana-screenshot
+        image: mrtux/grafana-screenshot:latest
+        pull: true
+        restart_policy: unless-stopped
+        detach: yes
+        env:
+          MQTT_BROKER_URL: "{{ kiosk_mqtt_host }}"
+          MQTT_TOPIC: "{{ kiosk_mqtt_topic }}"
+          GRAFANA_DASHBOARD_URL: "{{ kiosk_grafana_url }}"
+          GRAFANA_USERNAME: "{{ kiosk_grafana_user }}"
+          GRAFANA_PASSWORD: "{{ kiosk_grafana_pass }}"
+      tags:
+        - grafana-screenshot
+
   handlers:
     - name: restart mosquitto
       docker_container:

host_vars/hobbes.n39.eu/vars.yml

@@ -2,8 +2,6 @@
 server_admin: "admin+hobbes@netz39.de"
 mac: "b8:27:eb:f9:43:43"
 kiosk_user: pi
-kiosk_software_version: v1.0.6
+kiosk_mqtt_host: "mqtt.n39.eu"
-kiosk_software_arch: "armv7"
+kiosk_mqtt_topic: "Netz39/Things/HackingDashboard/Screenshot"
-kiosk_url: "https://grafana.n39.eu/d/xpLj6UD4z/hobbes-space-monitor?orgId=1"
+docker_data_root: "/srv/docker"
-kiosk_grafana_user: "{{ vault_kiosk_grafana_user }}"
-kiosk_grafana_pass: "{{ vault_kiosk_grafana_pass }}"

host_vars/hobbes.n39.eu/vault

@@ -1,9 +1,6 @@
 $ANSIBLE_VAULT;1.1;AES256
-32313738636231313036633334333934643839636563646334336533316436653263623461643438
+32343732363234396136616164383833316634373061376235656566303761646461626138363432
-6362343635626266313466643465343962663931623662320a316635613231313930343937363064
+3264633461383739393138396233303839363132343866370a306433306364666438623434383036
-33326164333137633039376363643539346463303934333430626431336637326638363233333234
+63366634313937623736393636393030333961323335323762663538373631353331353162613362
-3132333533376134380a383837616331303536623665383735663531343538366332313236386137
+3661653539306365350a333263383537643738373939376563356566313732613766303931633630
-62306436663934383363616332316262313762633261396535663533636665633532316366386430
+6462
-65343830376634633365343337313433643465323662313563366463393664653766623338623635
-30653263303761316238396634346337636461643231303561353133643162633934323161663539
-66646364373034633334

host_vars/radon.n39.eu/vars.yml

@@ -4,3 +4,11 @@ pwr_meter_amqp_user: "pwr-meter"
 pwr_meter_amqp_pass: "{{ vault_pwr_meter_amqp_pass }}"
 pwr_meter_api_token: "{{ vault_pwr_meter_api_token }}"
 brotherql_printer_host: "brotherql-720nw.n39.eu"
+
+# URL for the grafana kiosk in our Bastelbereich
+kiosk_grafana_url: "https://grafana.n39.eu/d/xpLj6UD4z/hobbes-space-monitor?orgId=1"
+kiosk_grafana_user: "{{ vault_kiosk_grafana_user }}"
+kiosk_grafana_pass: "{{ vault_kiosk_grafana_pass }}"
+kiosk_mqtt_host: "mqtt.n39.eu"
+kiosk_mqtt_topic: "Netz39/Things/HackingDashboard/Screenshot"
+

host_vars/radon.n39.eu/vault

@@ -1,10 +1,14 @@
 $ANSIBLE_VAULT;1.1;AES256
-61393134306361663861356132333135633566626136383536363763646134386338363362343830
+64396666646432653766656333333139613631333035393137363036633330336134383932663631
-6339626232333037613437386634396138323438643037390a366338353862653439323961626532
+6533326532333366633136346232306637306266343264380a616164643037393036383834313238
-37393438326261363563323233333364323536373735383834383134653935383436356137396166
+32343437343466343262336137633436343935663465616364303961656565643134346563373461
-3531326465363438310a663232306138333866373637336234326166666261333332386632316163
+3337303534646563660a366562323065666630626331346266366139653533386238663361373930
-61616339656436666233343339383835643934366661366333386363386639306631643366623333
+30623733336361353838373730316537623066326166366634643466386332396333613531613564
-30666430623435633961613932323239343239623532316662323937346634656136396539303036
+38373363303466346639343563356339303037323261383034316439326237636565633462336462
-63363365363861646333386364373263303037663266323832663761633633663136616338323362
+35313561356465393337616162323866393365613537333461656234313464653165333963343331
-36326561623063646666373034333335373135343736633066393937653234313932363138643065
+32343634383335663764353831303864373637393833366333376635343665396366616363663033
-38646231333564303861633231353535623436326135303463613738346231633962
+37323031316535636131333738633237383665323638613233666432316261376239636234626638
+33313230643563316662323937656338613362646466323335376363626163383233623831643565
+31393438363334653863363536373632333930616636323237336236353863616638616165303931
+63333639393665633537646665613933323632376162363139656632323166393264313333653163
+64333935356138336562366634636364346461356539363162616438613232306533

templates/hobbes/grafana-kiosk.service.j2

@@ -1,36 +0,0 @@
-[Unit]
-Description=Grafana Kiosk
-Documentation=https://github.com/grafana/grafana-kiosk
-Documentation=https://grafana.com/blog/2019/05/02/grafana-tutorial-how-to-create-kiosks-to-display-dashboards-on-a-tv
-After=network.target
-Wants=graphical.target
-After=graphical.target
-
-[Service]
-User={{ kiosk_user }}
-Environment="DISPLAY=:0"
-Environment="XAUTHORITY=/home/{{ kiosk_user }}/.Xauthority"
-
-# These should work according to the docs, but are nowhere in the code?
-#Environment="KIOSK_MODE=full"
-#Environment="KIOSK_AUTOFIT=false"
-#Environment="KIOSK_LXDE_ENABLED=true"
-#Environment="KIOSK_LXDE_HOME=/home/{{ kiosk_user }}"
-#Environment="KIOSK_URL={{ kiosk_url }}"
-#Environment="KIOSK_LOGIN_METHOD=local"
-#Environment="KIOSK_LOGIN_USER={{ kiosk_grafana_user }}"
-#Environment="KIOSK_LOGIN_PASSWORD={{ kiosk_grafana_pass }}"
-
-# Disable screensaver etc.
-ExecStartPre=xset s off
-ExecStartPre=xset -dpms
-ExecStartPre=xset s noblank
-
-ExecStart=/home/{{ kiosk_user }}/bin/grafana-kiosk -kiosk-mode=full -autofit=false  -lxde-home=/home/{{ kiosk_user }} -URL="{{ kiosk_url }}" -login-method=local -username={{ kiosk_grafana_user }} --password={{ kiosk_grafana_pass }}
-
-Restart=on-failure
-RestartSec=30s
-
-[Install]
-WantedBy=graphical.target
-

templates/hobbes/kiosk.sh.j2

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+# Check if the script is run by root
+if [ "$EUID" -ne 0 ]
+  then echo "Please run as root"
+  exit
+fi
+
+# MQTT broker details
+BROKER="{{ kiosk_mqtt_host }}"
+TOPIC="{{ kiosk_mqtt_topic }}"
+
+# Variable to store the PID of the fbi process
+fbi_pid=0
+
+# Function to be executed on SIGTERM
+on_sigterm() {
+    echo "SIGTERM received, exiting..."
+    # Kill the fbi process with the stored PID
+    if [ $fbi_pid -ne 0 ]; then
+        sudo kill $fbi_pid
+    fi
+    # Remove the temporary file
+    rm -f /tmp/grafana.png
+    exit 0
+}
+
+# Trap SIGTERM and call on_sigterm() when it is received
+trap 'on_sigterm' SIGTERM
+
+while true
+do
+    # Subscribe to the topic and save received data to a file
+    mosquitto_sub -h $BROKER -t $TOPIC -C 1 > /tmp/grafana.png
+
+    # Kill the previous fbi process
+    if [ $fbi_pid -ne 0 ]; then
+        sudo kill $fbi_pid
+    fi
+
+    # Display the image using fbi
+    fbi -T 1 -noverbose -a /tmp/grafana.png &
+    fbi_pid=$!
+
+    # Wait to avoid a race condition between
+    # fbi starting and mosquitto truncating the file
+    sleep 1
+done