fix: Ensure gid set correctly in Telegraf images (#719)

Author: powersj

telegraf/1.27/entrypoint.sh

@@ -11,5 +11,6 @@ else
     # Allow telegraf to send ICMP packets and bind to privliged ports
     setcap cap_net_raw,cap_net_bind_service+ep /usr/bin/telegraf || echo "Failed to set additional capabilities on /usr/bin/telegraf"
 
-    exec setpriv --reuid telegraf --init-groups "$@"
+    export HOME=$(getent passwd telegraf | cut -d : -f 6)
+    exec setpriv --reuid telegraf --regid telegraf --groups telegraf "$@"
 fi

telegraf/1.28/entrypoint.sh

@@ -11,5 +11,6 @@ else
     # Allow telegraf to send ICMP packets and bind to privliged ports
     setcap cap_net_raw,cap_net_bind_service+ep /usr/bin/telegraf || echo "Failed to set additional capabilities on /usr/bin/telegraf"
 
-    exec setpriv --reuid telegraf --init-groups "$@"
+    export HOME=$(getent passwd telegraf | cut -d : -f 6)
+    exec setpriv --reuid telegraf --regid telegraf --groups telegraf "$@"
 fi

telegraf/1.29/entrypoint.sh

@@ -11,5 +11,6 @@ else
     # Allow telegraf to send ICMP packets and bind to privliged ports
     setcap cap_net_raw,cap_net_bind_service+ep /usr/bin/telegraf || echo "Failed to set additional capabilities on /usr/bin/telegraf"
 
-    exec setpriv --reuid telegraf --init-groups "$@"
+    export HOME=$(getent passwd telegraf | cut -d : -f 6)
+    exec setpriv --reuid telegraf --regid telegraf --groups telegraf "$@"
 fi

telegraf/nightly/entrypoint.sh

@@ -11,5 +11,6 @@ else
     # Allow telegraf to send ICMP packets and bind to privliged ports
     setcap cap_net_raw,cap_net_bind_service+ep /usr/bin/telegraf || echo "Failed to set additional capabilities on /usr/bin/telegraf"
 
-    exec setpriv --reuid telegraf --init-groups "$@"
+    export HOME=$(getent passwd telegraf | cut -d : -f 6)
+    exec setpriv --reuid telegraf --regid telegraf --groups telegraf "$@"
 fi