added check for qemu-guest agent

alpine/alpine-essentials.sh

@@ -11,7 +11,27 @@ echo "http://dl-cdn.alpinelinux.org/alpine/latest-stable/community" >> /etc/apk/
 
 # apk update and install essentials
 apk update && apk upgrade
-apk add nano sudo pwgen curl wget qemu-guest-agent git bash-doc bash-completion openssh iputils restic --no-cache
+apk add nano sudo pwgen curl wget git bash-doc bash-completion openssh iputils restic --no-cache
+
+# check if vm or lxc
+if [[ ! -d /dev/disk/by-id ]]
+    then
+        apk add qemu-guest-agent
+        rc-update add qemu-guest-agent
+        rc-service qemu-guest-agent start
+    else
+        isInFile=$(ls /dev/disk/by-id | grep -c "QEMU")
+            if [ $isInFile -eq 0 ]
+                then
+                    rc-service qemu-guest-agent stop
+                    rc-update del qemu-guest-agent
+                    apk del qemu-guest-agent
+                else
+                    apk add qemu-guest-agent
+                    rc-update add qemu-guest-agent
+                    rc-service qemu-guest-agent start
+            fi
+fi
 
 # change default shell to bash
 isInFile=$(cat /etc/passwd | grep -c "/bin/bash")