Adding script that grabs IO

postgres-io-script.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Configuration
+CONTAINER_NAME="postgres"  # Your PostgreSQL container name
+IO_THRESHOLD=10  # Block I/O threshold in GiB
+
+# Get container ID from name
+CONTAINER_ID=$(docker ps --filter "name=$CONTAINER_NAME" --format "{{.ID}}")
+
+if [ -z "$CONTAINER_ID" ]; then
+  echo "$(date): Container '$CONTAINER_NAME' not found or not running. Exiting."
+  exit 0
+fi
+
+# Get current block I/O usage and convert to proper numerical format
+IO_RAW=$(docker stats $CONTAINER_ID --no-stream --format "{{.BlockIO}}")
+echo "$(date): PostgreSQL block I/O usage: ${IO_RAW} (Threshold: ${IO_THRESHOLD}GB)"
+
+# Extract the numerical value and handle MB/GB conversion
+if [[ $IO_RAW == *"MB"* ]]; then
+  IO_USAGE=$(echo $IO_RAW | sed 's/MB.*//' | tr -d ' ')
+  # Convert MB to GB
+  IO_USAGE=$(echo "scale=3; $IO_USAGE / 1024" | bc)
+elif [[ $IO_RAW == *"GB"* ]]; then
+  IO_USAGE=$(echo $IO_RAW | sed 's/GB.*//' | tr -d ' ')
+else
+  echo "$(date): Unknown format for I/O usage: $IO_RAW"
+  exit 1
+fi
+
+echo "$(date): Converted I/O usage: ${IO_USAGE}GB"
+
+# Check if I/O usage exceeds threshold using bc for decimal comparison
+if (( $(echo "$IO_USAGE > $IO_THRESHOLD" | bc -l) )); then
+  echo "$(date): Block I/O threshold exceeded! Restarting container..."
+  docker stop $CONTAINER_NAME
+  docker start $CONTAINER_NAME
+  echo "$(date): Container restarted."
+fi