pdudaemon: add config for labgrid-wigyori

The pdudaemon here hosts a ClusterHAT which is an RPi hat for triggering
4 microUSB ports. Managing the ports is done via the "clusterctrl" tool
which pokes the GPIO expander on the hat via i2c.

Due to this, the pdudaemon service file is also extended to give i2c
group access to the pdudaemon process.

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>

Author: wigyori

ansible/files/exporter/pdudaemon-labgrid-wigyori.conf

@@ -0,0 +1,15 @@
+{
+    "daemon": {
+        "hostname": "localhost",
+        "port": 16421,
+        "logging_level": "DEBUG",
+        "listener": "http"
+    },
+    "pdus": {
+            "clusterhat": {
+                "driver": "localcmdline",
+                "cmd_on": "/usr/sbin/clusterctrl on p%s",
+                "cmd_off": "/usr/sbin/clusterctrl off p%s"
+            }
+     }
+}

ansible/files/exporter/pdudaemon.service

@@ -8,6 +8,7 @@ DynamicUser=yes
 StateDirectory=pdudaemon
 ProtectHome=true
 Restart=on-abnormal
+SupplementaryGroups=i2c
 
 [Install]
 WantedBy=multi-user.target