test write otlp metric with curl

send-metric.sh

now=$(date +%s)

data="
{
    \"resourceMetrics\": [
      {
        \"resource\": {
          \"attributes\": [
            {
              \"key\": \"service.name\",
              \"value\": {
                \"stringValue\": \"service_foo\"
              }
            }
          ]
        },
        \"scopeMetrics\": [
          {
            \"metrics\": [
              {
                \"name\": \"test_metric\",
                \"unit\": \"s\",
                \"description\": \"\",
                \"gauge\": {
                  \"dataPoints\": [
                    {
                      \"asInt\": 1,
                      \"timeUnixNano\": ${now}000000000
                    }
                  ]
                }
              }
            ]
          }
        ]
      }
    ]
  }
"


curl \
  -k \
  -i \
  -XPOST \
  -H 'Content-Type: application/json' \
  https://${HOST}/otlp/v1/metrics -d "${data}"