"The Docker daemon - dockerd - is the heart of the container engine. It manages container lifecycle, networking, storage, images, system events, and API communication. While Docker works out of the box after installation, configuring the daemon gives administrators deeper control over performance, security, and remote access. This guide dives into the essential configurations of the Docker daemon on Linux. You'll learn how to manage Docker using systemd, debug it in foreground mode,"
"expose secure and insecure sockets, use TLS for encrypted API access, and persist configurations through the daemon.json file. By the end, you'll have a clear understanding of how the Docker daemon works and how to tune it for production. Managing Docker with systemd On most Linux distributions, Docker ships with a systemd unit file. This makes it easy to manage the Docker Engine using standard systemctl..."
dockerd controls container lifecycle, networking, storage, images, events, and API communication on Linux. Managing Docker with systemd uses a packaged unit file to start, stop, and supervise the daemon with systemctl. Running the daemon in the foreground aids debugging and log visibility. The daemon can listen on Unix sockets and TCP sockets; TCP sockets enable remote API access but require careful security controls. TLS and certificate management protect API traffic and authenticate clients. daemon.json provides a persistent, versionable place for daemon options and best-practice defaults. Proper configuration improves performance, security, and operational control.
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