The documentation you are viewing is for Dapr v1.12 which is an older version of Dapr. For up-to-date documentation, see the latest version.


Understand Dapr logging

Dapr produces structured logs to stdout, either in plain-text or JSON-formatted. By default, all Dapr processes (runtime, or sidecar, and all control plane services) write logs to the console (stdout) in plain-text. To enable JSON-formatted logging, you need to add the --log-as-json command flag when running Dapr processes.

Log schema

Dapr produces logs based on the following schema:

Field Description Example
time ISO8601 Timestamp 2011-10-05T14:48:00.000Z
level Log Level (info/warn/debug/error) info
type Log Type log
msg Log Message hello dapr!
scope Logging Scope dapr.runtime
instance Container Name dapr-pod-xxxxx
app_id Dapr App ID dapr-app
ver Dapr Runtime Version 1.9.0

API logging may add other structured fields, as described in the documentation for API logging.

Plain text and JSON formatted logs

  • Plain-text log examples
time="2022-11-01T17:08:48.303776-07:00" level=info msg="starting Dapr Runtime -- version 1.9.0 -- commit v1.9.0-g5dfcf2e" instance=dapr-pod-xxxx scope=dapr.runtime type=log ver=1.9.0
time="2022-11-01T17:08:48.303913-07:00" level=info msg="log level set to: info" instance=dapr-pod-xxxx scope=dapr.runtime type=log ver=1.9.0
  • JSON-formatted log examples
{"instance":"dapr-pod-xxxx","level":"info","msg":"starting Dapr Runtime -- version 1.9.0 -- commit v1.9.0-g5dfcf2e","scope":"dapr.runtime","time":"2022-11-01T17:09:45.788005Z","type":"log","ver":"1.9.0"}
{"instance":"dapr-pod-xxxx","level":"info","msg":"log level set to: info","scope":"dapr.runtime","time":"2022-11-01T17:09:45.788075Z","type":"log","ver":"1.9.0"}

Log formats

Dapr supports printing either plain-text, the default, or JSON-formatted logs.

To use JSON-formatted logs, you need to add additional configuration options when you install Dapr and when deploy your apps. The recommendation is to use JSON-formatted logs because most log collectors and search engines can parse JSON more easily with built-in parsers.

Enabling JSON logging with the Dapr CLI

When using the Dapr CLI to run an application, pass the --log-as-json option to enable JSON-formatted logs, for example:

dapr run \
  --app-id orderprocessing \
  --resources-path ./components/ \
  --log-as-json \
    -- python3

Enabling JSON logging in Kubernetes

The following steps describe how to configure JSON-formatted logs for Kubernetes

Dapr control plane

All services in the Dapr control plane (such as operator, sentry, etc) support a --log-as-json option to enable JSON-formatted logging.

If you’re deploying Dapr to Kubernetes using a Helm chart, you can enable JSON-formatted logs for Dapr system services by passing the --set global.logAsJson=true option; for example:

helm upgrade --install dapr \
  dapr/dapr \
  --namespace dapr-system \
  --set global.logAsJson=true

Enable JSON-formatted log for Dapr sidecars

You can enable JSON-formatted logs in Dapr sidecars by adding the "true" annotation to the deployment, for example:

apiVersion: apps/v1
kind: Deployment
  name: pythonapp
    app: python
      app: python
        app: python
      annotations: "true" "pythonapp"
        # This enables JSON-formatted logging "true"

API Logging

API logging enables you to see the API calls your application makes to the Dapr sidecar, to debug issues or monitor the behavior of your application. You can combine both Dapr API logging with Dapr log events.

See configure and view Dapr Logs and configure and view Dapr API Logs for more information.

Log collectors

If you run Dapr in a Kubernetes cluster, Fluentd is a popular container log collector. You can use Fluentd with a JSON parser plugin to parse Dapr JSON-formatted logs. This how-to shows how to configure Fluentd in your cluster.

If you are using Azure Kubernetes Service, you can use the built-in agent to collect logs with Azure Monitor without needing to install Fluentd.

Search engines

If you use Fluentd, we recommend using Elastic Search and Kibana. This how-to shows how to set up Elastic Search and Kibana in your Kubernetes cluster.

If you are using the Azure Kubernetes Service, you can use Azure Monitor for containers without installing any additional monitoring tools. Also read How to enable Azure Monitor for containers


Last modified August 21, 2023: start refresh (8e5eccb8)