Practice Exercise 3

Practice Exercise 3 : Basic Prometheus Query Operations

Objective: Practice fundamental query operations within the Prometheus system to retrieve and analyze metrics.

Instructions:

1. Access Prometheus Web UI:

• Open a web browser and navigate to your Prometheus web UI.

2. Query for Uptime:

• Retrieve the system uptime metric.

  `uptime`
  

3. Count Available CPUs:

• Find out the total number of available CPUs.

  `count(cpu)`
  

4. Calculate Average CPU Usage:

• Calculate the average CPU usage percentage.

  `avg(cpu_usage)`
  

5. Filter for Specific Process Memory Usage:

• Query for the memory usage of a specific process (replace <process_name> with the actual process name).

  `process_memory_usage_bytes{process_name="<process_name>"}`
  

6. Explore Range Queries:

• Perform a range query to analyze historical data.
• Query for the maximum CPU temperature over the last hour.

  `max_over_time(cpu_temperature{sensor="cpu"}[1h])`
  

7. Aggregate CPU Usage Over Time:

• Aggregate CPU usage over a 5-minute interval and express it as a percentage.

  `avg_over_time(cpu_usage[5m]) * 100`
  

8. Filter Metrics by Label:

• Filter metrics by a specific label (replace <label_key> and <label_value> with the actual label key and value).

  `metric_name{<label_key>="<label_value>"}`
  

9. Calculate Memory Usage Percentage:

• Calculate the percentage of used memory.

  `(1 - (node_memory_MemFree_bytes + node_memory_Cached_bytes) / node_memory_MemTotal_bytes) * 100`
  

10. Use Offset in Range Query:

• Query for the average disk space usage over the last 6 hours, with a 1-hour offset.

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  avg_over_time(node_filesystem_avail_bytes{mountpoint="/"}[6h] offset 1h)