chore: add convenient script for checking node state via /health endpoint (#86)

chkhealth.sh

@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+
+# optional argument to specgify the ip address
+ip_address="localhost:8645"
+plain_text_out=false
+
+# Parse command line arguments
+POSITIONAL_ARGS=()
+
+while [[ $# -gt 0 ]]; do
+  case $1 in
+    -p|--plain)
+      plain_text_out=true
+      shift # past argument
+      ;;
+    -*|--*)
+      echo "Unknown option $1"
+      exit 1
+      ;;
+    *)
+      POSITIONAL_ARGS+=("$1") # save positional arg
+      shift # past argument
+      ;;
+  esac
+done
+
+set -- "${POSITIONAL_ARGS[@]}" # restore positional parameters
+
+# Check if an IP address is provided as an argument
+if [[ -n "$1" ]]; then
+  ip_address="$1"
+fi
+
+# check if curl is available
+if ! command -v curl &> /dev/null
+then
+    echo "curl could not be found"
+    exit 1
+fi
+
+response=$(curl --connect-timeout 6 -s GET http://${ip_address}/health)
+
+if [[ $? -ne 0 ]]; then
+  echo -e "$(date +'%H:%M:%S') - Node may not be running or not reachable at http://${ip_address}\n"
+  exit 1
+fi
+
+if [[ -z "${response}" ]]; then
+  echo -e "$(date +'%H:%M:%S') - node health status is: unknown\n"
+  exit 1
+fi
+
+if ! command -v jq &> /dev/null || [[ "$plain_text_out" = true ]]; then
+  echo -e "$(date +'%H:%M:%S') - node health status is: ${response}\n"
+else
+  echo -e "$(date +'%H:%M:%S') - node health status is:\n"
+  echo "${response}" | jq . 2>/dev/null
+  if [[ $? -ne 0 ]]; then
+    echo -e "${response}"
+  fi
+fi