Alerting on queue depth and consumer lag in RabbitMQ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check the current depth of a RabbitMQ queue using the CLI.

RabbitMQ

rabbitmqctl list_queues -p / name messages_ready [1]

Drag options to blanks, or click blank then click option'

A--vhost=/

B--all

C--queue

D--depth

Attempts:

3 left

💡 Hint

Common Mistakes

Using an option that does not exist like --depth

Omitting the virtual host option

The --vhost=/ option specifies the virtual host to query.

2fill in blank

medium

Complete the command to get consumer lag metrics from RabbitMQ management API using curl.

RabbitMQ

curl -u guest:guest http://localhost:15672/api/queues/[1]/myqueue

Drag options to blanks, or click blank then click option'

A%2F

Bqueue

Capi

Dmanagement

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'queue' instead of the virtual host name in the URL

Missing URL encoding for special characters in vhost

The API URL requires the virtual host name in the path to get queue details.

3fill in blank

hard

Fix the error in the Prometheus alert rule to trigger when queue depth exceeds 1000.

RabbitMQ

alert: HighQueueDepth
expr: rabbitmq_queue_messages_ready > [1]
for: 5m
labels:
  severity: warning
annotations:
  summary: "Queue depth is high"

Drag options to blanks, or click blank then click option'

A1k

B"1000"

C1000m

D1000

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the number in quotes causing a syntax error

Using units like 'm' or 'k' which Prometheus does not parse

The expression expects a numeric value without quotes or units. Using 1000 is correct.

4fill in blank

hard

Fill both blanks to create a Prometheus alert that triggers when consumer lag is above 500 for 10 minutes.

RabbitMQ

alert: HighConsumerLag
expr: rabbitmq_consumer_lag [1] [2]
for: 10m
labels:
  severity: critical
annotations:
  summary: "Consumer lag is too high"

Drag options to blanks, or click blank then click option'

A>

B500

C<

D1000

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than operator instead of greater than

Setting the threshold too high or too low

The alert triggers when the consumer lag metric is greater than 500.

5fill in blank

hard

Fill all three blanks to define a Prometheus alert that fires when queue depth is above 1000 and consumer lag is above 200.

RabbitMQ

alert: QueueDepthAndLagHigh
expr: rabbitmq_queue_messages_ready [1] [2] and rabbitmq_consumer_lag [3] 200
for: 5m
labels:
  severity: critical
annotations:
  summary: "Queue depth and consumer lag are high"

Drag options to blanks, or click blank then click option'

A>

B1000

D500

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect operators like less than

Mixing up threshold values

The alert expression checks if queue depth is greater than 1000 and consumer lag is greater than 200.