Docker Pull Images
Nautilus project developers are planning to start testing on a new project. As per their meeting with the DevOps team, they want to test containerized environment application features. As per details shared with DevOps team, we need to accomplish the following task:
a. Pull busybox:musl image on App Server 3 in Stratos DC and re-tag (create new tag) this image as busybox:blog.
Steps
-
Pull Image
-
Create new Tag
docker tag busybox:musl busybox:blog
Good to Know?
Docker Image Management
- Images: Read-only templates for creating containers
- Layers: Images built in layers for efficiency
- Registry: Central repository for storing images (Docker Hub)
- Tags: Labels to identify different versions of images
Image Operations
- Pull:
docker pull image:tag - Download from registry
- List:
docker images - Show local images
- Remove:
docker rmi image:tag - Delete local image
- Build:
docker build -t name:tag . - Create from Dockerfile
Tagging Strategy
- Semantic Versioning: Use version numbers (1.0.0, 1.1.0)
- Environment Tags: dev, staging, prod
- Latest Tag: Points to most recent version
- Descriptive Tags: Include purpose or feature name
BusyBox Image
- Minimal: Tiny Linux distribution (~1MB)
- Utilities: Common Unix utilities in single executable
- Debugging: Useful for troubleshooting containers
- Base Image: Often used as minimal base for custom images