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TanjinAlam/server_health_check

Last active March 22, 2025 20:17
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Revisions

  1. TanjinAlam revised this gist Mar 22, 2025. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion server_health_check
    View file
    Original file line number Diff line number Diff line change
    @@ -1,7 +1,7 @@
    #!/bin/bash

    # Configuration
    SERVICE_URL="http://127.0.0.1:3311"
    SERVICE_URL="http://127.0.0.1:3000"
    LOG_FILE="/var/log/nodejs-health.log"
    WARNING_FILE="/var/log/nodejs-warnings.log"

  2. TanjinAlam created this gist Mar 21, 2025.
    66 changes: 66 additions & 0 deletions server_health_check
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,66 @@
    #!/bin/bash

    # Configuration
    SERVICE_URL="http://127.0.0.1:3311"
    LOG_FILE="/var/log/nodejs-health.log"
    WARNING_FILE="/var/log/nodejs-warnings.log"

    # Function to log messages
    log_message() {
    local timestamp=$(date '+%Y-%m-%d %H:%M:%S')
    echo "[$timestamp] $1" >> "$LOG_FILE"
    }

    # Function to log warnings
    log_warning() {
    local timestamp=$(date '+%Y-%m-%d %H:%M:%S')
    echo "[$timestamp] WARNING: $1" >> "$WARNING_FILE"
    }

    # Function to check if systemd service is running
    check_systemd_service() {
    systemctl is-active --quiet node-app.service
    return $?
    }

    # Function to restart the service
    restart_service() {
    log_message "Attempting to restart node-app.service..."
    sudo systemctl restart node-app.service
    sleep 5 # Wait for service to restart

    if check_systemd_service; then
    log_message "Service successfully restarted"
    return 0
    else
    log_warning "Failed to restart Node.js service - System remains down"
    return 1
    fi
    }

    # Main health check
    main() {
    # Create log files if they don't exist
    touch "$LOG_FILE"
    touch "$WARNING_FILE"

    # Check if service is running
    if ! check_systemd_service; then
    log_warning "Node.js service is not running - System crashed"
    restart_service
    exit 1
    fi

    # Make HTTP request to check service
    response=$(curl -s -w "%{http_code}" "$SERVICE_URL" -o /dev/null)

    if [ "$response" = "200" ]; then
    log_message "Health check passed - Service is responding normally"
    else
    log_warning "Service is not responding properly (HTTP $response) - System may be crashed"
    restart_service
    fi
    }

    # Run main function
    main