6. Build OpenPipeline Alert

Telemetry is flowing into Dynatrace. Logs and spans are being enriched with metadata from both the Kubernetes API and custom pod annotations that we've added to the cartservice.

As the developer, you already know that if an error log occurs that contains the content:

Wasn't able to connect to Redis.

This is serious enough that you immediately want an alert. So you've added the following rule to the collector:

processors:
  transform:
    log_statements:
      - context: log
        statements:
          - set(attributes["alertme"], "true")
            where resource.attributes["service.name"] == "cartservice"
            and IsMatch(body, "(?i)wasn't able to connect to redis.*")

This uses the transform processor to act on each log line, as it flows through the collector.

Read the rule as follows:

• If the log originates from the cartservice
• and the log line contains the phrase wasn't able to connect to redis (case insensitive)
• add a new attribute called alertme and set the value to "true"

In other words, the following log line would not be modified:

input

{
    "status": "INFO",
    "content": "some log line text here"
}