Logging

import "https://github.com/onelazyugy/golang-common/logger"
import "https://github.com/onelazyugy/golang-common/constants"

func Handler(w http.ResponseWriter, r *http.Request){
    //Populate related fields
    //Corelation id is a must
    fields := map[string]interface{}{
		"request_id": "Create Item", "user_ip": "TEST Item Create",
		"nep-correlation-id": r.Header.Get(constants.CorrelationID),
	}
    //Get a new logger with fields
	log := logger.New("ENV_PROFILE").WithFields(fields)
	log.Info("Creating items...")
    /*JSON Output:   
        {
            "level": "info",
            "msg": "Creating items...",
            "nep-correlation-id": 11235,
            "request_id": "Create Item",
            "time": "2021-02-25T17:23:12-05:00",
            "user_ip": "TEST Item Create"
        }
    */
    /*Pretty Print: INFO   [2021-02-25T17:24:43-05:00] Creating items...       nep-correlation-id=11235 request_id="Create Item" user_ip="TEST Item Create" */
}

//Always log at levels do not use print 
log.Info()
log.Debug()
log.Error()
log.Fatal()

The logger uses logrus logging package which is thread safe and compatable with go's standard logger. All standard log functions are exposed. Logrus Documentation

Logs can be found here. Run the following query:

resource.type="k8s_container" resource.labels.cluster_name="xxx" resource.labels.namespace_name="xxxx" resource.labels.container_name="xxxx"

How to Query Logs?