Docker commonly used commands: 1. [docker version], check the docker container version; 2. [docker info], check the docker container information; 3. [docker images], list the local images.
1. Docker container information
(recommended learning: docker tutorial)
2. Mirror operation
Tip: For mirror operations, you can use the image name, image long ID, and short ID.
2.1. Mirror view
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The core of Docker monitoring is to collect and analyze the operating data of containers, mainly including indicators such as CPU usage, memory usage, network traffic and disk I/O. By using tools such as Prometheus, Grafana and cAdvisor, comprehensive monitoring and performance optimization of containers can be achieved.

DockerSwarm can be used to build scalable and highly available container clusters. 1) Initialize the Swarm cluster using dockerswarminit. 2) Join the Swarm cluster to use dockerswarmjoin--token:. 3) Create a service using dockerservicecreate-namemy-nginx--replicas3nginx. 4) Deploy complex services using dockerstackdeploy-cdocker-compose.ymlmyapp.

How to use Docker and Kubernetes to perform container orchestration of enterprise applications? Implement it through the following steps: Create a Docker image and push it to DockerHub. Create Deployment and Service in Kubernetes to deploy applications. Use Ingress to manage external access. Apply performance optimization and best practices such as multi-stage construction and resource constraints.

Docker FAQs can be diagnosed and solved through the following steps: 1. View container status and logs, 2. Check network configuration, 3. Ensure that the volume mounts correctly. Through these methods, problems in Docker can be quickly located and fixed, improving system stability and performance.

Docker is a must-have skill for DevOps engineers. 1.Docker is an open source containerized platform that achieves isolation and portability by packaging applications and their dependencies into containers. 2. Docker works with namespaces, control groups and federated file systems. 3. Basic usage includes creating, running and managing containers. 4. Advanced usage includes using DockerCompose to manage multi-container applications. 5. Common errors include container failure, port mapping problems, and data persistence problems. Debugging skills include viewing logs, entering containers, and viewing detailed information. 6. Performance optimization and best practices include image optimization, resource constraints, network optimization and best practices for using Dockerfile.

Docker security enhancement methods include: 1. Use the --cap-drop parameter to limit Linux capabilities, 2. Create read-only containers, 3. Set SELinux tags. These strategies protect containers by reducing vulnerability exposure and limiting attacker capabilities.

DockerVolumes ensures that data remains safe when containers are restarted, deleted, or migrated. 1. Create Volume: dockervolumecreatemydata. 2. Run the container and mount Volume: dockerrun-it-vmydata:/app/dataubuntubash. 3. Advanced usage includes data sharing and backup.

Docker provides three main network modes: bridge network, host network and overlay network. 1. The bridge network is suitable for inter-container communication on a single host and is implemented through a virtual bridge. 2. The host network is suitable for scenarios where high-performance networks are required, and the container directly uses the host's network stack. 3. Overlay network is suitable for multi-host DockerSwarm clusters, and cross-host communication is realized through the virtual network layer.


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