Update rpi_docker_monitor.sh

rpi_docker_monitor.sh

@@ -1,11 +1,29 @@
-#!/bin/sh
-echo "creating directories"
+#!/bin/bash
+
+function error {
+  echo -e "\\e[91m$1\\e[39m"
+  exit 1
+}
+
+function check_internet() {
+  printf "Checking if you are online..."
+  wget -q --spider http://github.com
+  if [ $? -eq 0 ]; then
+    echo "Online. Continuing."
+  else
+    error "Offline. Go connect to the internet then run the script again."
+  fi
+}
+
+check_internet
+
+echo "Creating directories..."
 sudo mkdir -p /portainer/Files/AppData/Config/prometheus/config
 sudo mkdir -p /portainer/Files/AppData/Config/prometheus/data
 sudo mkdir -p /portainer/Files/AppData/Config/grafana/data
 echo "downloading prometheus config files"
-sudo wget -O /portainer/Files/AppData/Config/prometheus/config/prometheus.yml https://raw.githubusercontent.com/oijkn/Docker-Raspberry-PI-Monitoring/main/prometheus/prometheus.yml
-sudo touch /portainer/Files/AppData/Config/grafana/grafana.ini
-echo "setting permissions"
-sudo chown -R 472:472 /portainer/Files/AppData/Config/grafana/data
-echo "done"
+sudo wget -O /portainer/Files/AppData/Config/prometheus/config/prometheus.yml https://raw.githubusercontent.com/oijkn/Docker-Raspberry-PI-Monitoring/main/prometheus/prometheus.yml || error "Failed to download prometheus.yml file!"
+sudo touch /portainer/Files/AppData/Config/grafana/grafana.ini || error "Failed to touch grafana.ini file!"
+echo "Setting permissions..."
+sudo chown -R 472:472 /portainer/Files/AppData/Config/grafana/data || error "Failed to set permissions for Grafana data!"
+echo "Done"