Grabs all of the CloudWatch metric names and dimensions and prints them in Splunk's inputs.conf format for easy use with the Splunk AWS add-on. Requires awscli and jq.

cloudwatch-metrics-to-splunk-inputs_conf.sh

#!/bin/bash -ex

exec aws cloudwatch list-metrics \
    | jq -r '
        .Metrics
        | reduce .[] as $item ({}; .[$item.Namespace] |= {
            names: (.names + [$item.MetricName] | unique),
            dimensions: (.dimensions + [$item.Dimensions[].Name?] | unique)
        })
        | to_entries
        | .[]
        | .value.dimensions |= map({
            (.): [".*"]
        })
        | "[aws_cloudwatch://\(.key | gsub("/"; ".") | ascii_downcase)]\n"
            + "metric_namespace = \(.key)\n"
            + "metric_names = \(.value.names | tojson)\n"
            + "metric_dimensions = \(.value.dimensions | tojson)\n"'