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Technical Articles

Operation and Maintenance

Docker

How to execute host commands by docker

There are two ways to execute the host command in a Docker container: use a privileged container, and add the --privileged flag when running the docker run command. Bind the host network namespace to the container and add the --net=host flag when running the docker run command.

Apr 15, 2025 am 09:30 AM

docker

How to share docker data volumes

Shared data volumes allow multiple containers to access the same data. The steps include: creating a data volume, mounting the data volume to a container, and copying the same data volume to another container. Notes include: All changes to the container are immediately visible, with the same permissions, and compatibility. Example: Create a database file data volume, mount it to database and web containers, so that they can both access the database files.

Apr 15, 2025 am 09:27 AM

docker 持久化存储

How to import image files from docker

Two methods of importing Docker image files: directly import the image name: docker pull [mirror name] Import tar archive file: docker load < [mirror file path]

Apr 15, 2025 am 09:24 AM

docker nginx

How to install kafka by docker

Install Kafka using Docker Steps: Make sure Docker is installed on your system. Pull the official Kafka image from Docker Hub: docker pull confluentinc/cp-kafka Create and start Kafka container: docker run -d --name kafka -p 9092:9092 confluentinc/cp-kafka Use docker logs kafka to check the container logs to verify that Kafka is running. Access the Kafka control panel through your browser: http://localh

Apr 15, 2025 am 09:21 AM

docker

How to enter mysql image by docker

To enter the MySQL image in Docker, you need to perform the following steps: Start the MySQL container (docker run -d --name my-mysql -e MYSQL_ROOT_PASSWORD=my-password mysql). Find container ID (docker ps). Enter the container (docker exec -it <container-id> bash). Connect to MySQL (mysql -u root -p).

Apr 15, 2025 am 09:18 AM

mysql docker

How to delete all images by docker

Use the command docker rmi -f $(docker images -a -q) to delete all images in Docker. This command does the following: Get a list of IDs for all images (including the one being used). Force delete these images.

Apr 15, 2025 am 09:15 AM

docker

How to copy redis by docker

Redis in Docker requires setting master-slave replication. Specific steps include: 1. Create the main Redis container; 2. Start the replica container and connect to the main container; 3. Verify replication; 4. Perform failover (if required); 5. Extend replica (optional).

Apr 15, 2025 am 09:12 AM

redis docker

How to force delete images by docker

Forced delete Docker image steps: Check the image usage and stop and delete the container that uses the image to execute docker rmi -f <Mirror Name> Forced delete the image to verify that the image has been deleted

Apr 15, 2025 am 09:09 AM

docker

How to start the service in docker

Starting a service in Docker involves several steps: 1. Create a container, use the docker run command; 2. Expose the port, use the -p option; 3. Start the service, run as a daemon; 4. Verify the status, use the docker ps and docker logs commands.

Apr 15, 2025 am 09:06 AM

docker nginx

How to install yum in docker

Install YUM in Docker container: Create container from the base image; update the container's package information; install YUM.

Apr 15, 2025 am 09:03 AM

centos docker

How to connect mysql in docker

Connecting to the MySQL database in Docker takes only five steps: Start the MySQL container. Find the IP address of the container. Use an external client to connect to the IP address and port 3306. Enter the root password specified at startup. Specifies the database name specified at startup, if applicable.

Apr 15, 2025 am 09:00 AM

mysql docker

How to backup docker wordpress

There are two effective ways to back up a WordPress website in Docker: Use Docker volumes: create volumes, mount WordPress data, and back up volumes. Use WordPress plug-in: Install the plug-in, configure the backup and back up manually (if necessary). Choose the most appropriate backup method based on your needs and preferences, but it is essential to back up your WordPress website regularly to prevent data loss.

Apr 15, 2025 am 08:57 AM

docker wordpress 数据丢失

How to achieve isolation of docker

Docker achieves isolation through the following mechanisms: 1. Namespace isolation (PID, network, mount) 2. Control group (restrict resource usage) 3. Union file system (overlapping image file system and host file system) 4. SELinux (access control) 5. AppArmor (policy-based access control) 6. User namespace (isolating user and group environment)

Apr 15, 2025 am 08:54 AM

linux docker

How to view mirror information by docker

How to view Docker image information: List all images: docker images View specific image information: docker inspect [mirror ID or name] View image file system: docker run -it [mirror ID or name] /bin/sh

Apr 15, 2025 am 08:51 AM

docker