Let’s look at the differences between these two methods. However, we recommend starting the daemon as a service. If the Docker daemon is started on a terminal using the docker daemon command, it prints log events directly to the terminal. As of version 8.2, Debian uses systemd by default. Systemd based OSes (CoreOS, SUSE, Fedora, CentOS, Red Hat EnterpriseġFor installations using SysVinit. The following table shows the location of the log file in various operating systems and platforms: Platform When started using a process manager (such as systemd or Upstart), the daemon writes events to a log file. Where to Find the Daemon Logĭocker uses logrus, a structured logging framework for the Go programming language, to generate and format log events. You can retrieve a container’s ID by using the docker inspect command. For instance, a container with the name “sleepy_nobel” failed to respond to a stop command. However, messages regarding a container may refer to the container by ID rather than by name. The overall state of the Docker serviceĭaemon events often provide detailed information about the state of containers.The status of commands sent to containers.Actions performed during the initialization process.The events recorded by the daemon provide detailed information on: Details about the request, including the return typeįor example, listing the active containers on a Boot2Docker host generates the following log entry: time="T11:28:50.795661833-05:00" level=info msg="GET /v1.21/containers/json" Daemon Eventsĭaemon events are messages regarding the state of the Docker service itself.The endpoint (containers, images, data volumes, etc.).
Events that occur as part of the daemon’s normal operation.Commands sent to the daemon through Docker’s Remote API.
The Docker daemon logs two types of events:
#DOCKER DESKTOP LOGS HOW TO#
In this post, we’ll look at what the Docker daemon logs and how to collect and interpret the events it generates. Container-centric logging methods let you extract useful information from your services, but offer little to no insight into the state of the Docker service as a whole. The Docker daemon provides crucial insight into the overall state of your microservice architecture. While logging containers is important, it misses out on a key component of the Docker architecture: the Docker daemon. There’s a wealth of material on logging in Docker, but most of it is centered around containers and applications.
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