![docker remove container keep logs docker remove container keep logs](https://i.ytimg.com/vi/GZ76J9-Ewus/maxresdefault.jpg)
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.).The request type (GET, PUT, POST, etc.).The log level (Info, Warning, Error, etc.).Commands passed to the Remote API are automatically logged along with any warning or error messages resulting from those commands. The Remote API lets you interact with the daemon using common commands. 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 remove container keep 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. You can create new config file, and push it for example to the /usr/local/etc/php-fpm.d/logging.There’s a wealth of material on logging in Docker, but most of it is centered around containers and applications.
![docker remove container keep logs docker remove container keep logs](https://docs.docker.com/desktop/mac/images/console.png)
![docker remove container keep logs docker remove container keep logs](https://i.stack.imgur.com/NDnei.png)
To do that we need to make sure that the FPM is configured properly. The PHP-FPM allow us to catch workers output and forward them to the STDOUT. So the PHP-FPM is already writing its output to STDOUT. If you run your docker with FPM inside a docker container, and you run the docker logs command, you should see the output with processed requests, or errors.
![docker remove container keep logs docker remove container keep logs](https://raw.githubusercontent.com/l0k0ms/workshops/master/log-workshop-4/images/logs-gs.png)
In PHP we are often running our application using the PHP-FPM (Process Manager). So our goal is to redirect our logs to one of those streams. When you run the docker logs command in your terminal, you will see the output of STDOUT and STDERR streams. STDERR is the standard error stream, but the name I think is a bit confusing, because it is basically intended for diagnostic output. STDOUT is the stream where the running command may print the output. STDIN it's command input stream, that you can provide for ex. In linux every running process has 3 streams, STDIN, STDOUT, STDERR. If you are using Docker containers, and you running your application in cloud services, often they will be automatically writing the logs of your containers to tools like AWS CloudWatch or GCloud Stackdriver.īut first, you need to redirect your log streams to the output of the Docker container to be able to use them.ĭocker containers are running the Linux processes. Also, you have easy access to them, you no need to connect to your server to review them. Those solutions are better because give you interfaces to rotate and search your logs. Almost every cloud has a tool for rotating logs or if not, you can use for example Grafana Loki or ELK stack. When you run your application in a production environment, you should choose a better option to manage your logs. This option is ok if you run your application locally or on the VPS server for test. It's the default configuration for most backend frameworks. The most common method to store them is to put them in the text file. If you are using docker and cloud services to run your application live, you should manage your logs.