"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."
"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. By the end, you'll have a clear understanding of how the Docker daemon works and how to tune it for production."
The Docker daemon (dockerd) controls container lifecycle, networking, storage, images, system events, and API communication on Linux. Managing Docker with systemd uses the provided unit file and systemctl for starting, stopping, enabling, and applying drop-in overrides. Dockerd supports running in the foreground for debugging, socket activation, unsecured TCP sockets, and TLS-secured sockets for remote API access. TLS requires certificate generation and key management to encrypt and authenticate client connections. Persistent daemon options belong in /etc/docker/daemon.json, where logging drivers, storage drivers, registry mirrors, and other runtime settings can be configured to improve performance and security.
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