Connect to Logstash as an input

Step 1: Obtain an endpoint

Logstash establishes a connection to Message Queue for Apache Kafka through a Message Queue for Apache Kafka endpoint.

1. Log on to the Message Queue for Apache Kafka console.
2. In the left-side navigation pane, click Instances.
3. On the Instance Details page, select the instance that is to be connected to Logstash as an input.
4. In the Basic Information section, obtain the endpoint of the instance.
   

   Note For information about the differences between endpoints, see Endpoint comparison.

Step 2: Create a topic

Perform the following operations to create a topic for storing messages.

1. In the left-side navigation pane of the Message Queue for Apache Kafka console, click Topics.
2. On the Topics page, click Create Topic.
3. In the Create Topic dialog box, enter the topic information and click Create.
   

Step 3: Send messages

Perform the following operations to send messages to the topic you created.

1. On the Topics page of the Message Queue for Apache Kafka console, find the topic you just created and click Send Message in the Actions column.
2. In the Send Message dialog box, enter the message information and click Send.
   

Step 4: Create a consumer group

Perform the following operations to create a consumer group for Alibaba Cloud Logstash.

1. In the left-side navigation pane of the Message Queue for Apache Kafka console, click Consumer Groups.
2. On the Consumer Groups page, click Create Consumer Group.
3. In the Create Consumer Group dialog box, enter the consumer group information and click Create.
   

Step 5: Use Logstash to consume messages

Start Logstash on the server where Logstash has been installed, and consume messages from the created topic.

1. Run the following command to switch to the bin directory:

   cd /home/logstash/logstash-7.6.2/bin

2. Create the input.conf configuration file.
   1. Run the vim input.conf command.
   2. Press i.
   3. Enter the following content:

      input {
       kafka {
           bootstrap_servers => "192.168.XXX.XXX:9092,192.168.XXX.XXX:9092,192.168.XXX.XXX:9092"
           group_id => "logstash_group"
           topics => ["logstash_test"]
           consumer_threads => 12
           auto_offset_reset => "earliest"
       }
      }
      output {
       stdout{codec=>rubydebug}
      }

      Parameter	Description	Example
      bootstrap_servers	Message Queue for Apache Kafka supports the following VPC endpoints: Default endpoint SASL endpoint	192.168.XXX.XXX:9092,192.168.XXX.XXX:9092,192.168.XXX.XXX:9092
      group_id	The name of the consumer group.	logstash_group
      topics	The name of the topic.	logstash_test
      consumer_threads	The number of consumer threads. We recommend that you set it to the number of partitions of the topic.	12
      auto_offset_reset	The reset offset. Valid values: earliest: The earliest message is read. latest: The latest message is read.	earliest

   4. Press Esc, enter :wq, and then press Enter.
3. Run the following command to consume messages:

   ./logstash -f input.conf

   The output is as follows:

   

More information

For more information about parameter settings, see Kafka input plugin.