{"id":18410645,"url":"https://github.com/guptaroshan/docker-topics","last_synced_at":"2025-04-12T22:46:17.657Z","repository":{"id":249486772,"uuid":"831654906","full_name":"GuptaRoshan/Docker-Topics","owner":"GuptaRoshan","description":"Docker Topics Overview","archived":false,"fork":false,"pushed_at":"2024-07-21T08:17:38.000Z","size":5,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"main","last_synced_at":"2025-04-12T22:46:00.598Z","etag":null,"topics":["docker"],"latest_commit_sha":null,"homepage":"","language":null,"has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/GuptaRoshan.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2024-07-21T08:16:56.000Z","updated_at":"2024-07-21T08:19:14.000Z","dependencies_parsed_at":"2024-07-21T09:40:21.728Z","dependency_job_id":null,"html_url":"https://github.com/GuptaRoshan/Docker-Topics","commit_stats":null,"previous_names":["guptaroshan/docker-topics"],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/GuptaRoshan%2FDocker-Topics","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/GuptaRoshan%2FDocker-Topics/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/GuptaRoshan%2FDocker-Topics/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/GuptaRoshan%2FDocker-Topics/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/GuptaRoshan","download_url":"https://codeload.github.com/GuptaRoshan/Docker-Topics/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":248643045,"owners_count":21138353,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["docker"],"created_at":"2024-11-06T03:33:12.490Z","updated_at":"2025-04-12T22:46:17.639Z","avatar_url":"https://github.com/GuptaRoshan.png","language":null,"funding_links":[],"categories":[],"sub_categories":[],"readme":"# Docker Learning Topics Overview\n\n\u003cimg src=\"https://github.com/GuptaRoshan/learning/blob/main/src/notes/assets/docker.jpg\" width=\"80%\" height=\"80%\" alt=\"Docker Concepts\"\u003e\n\n## 1. Introduction to Docker\n\n### What is Docker?\n\nDocker is a platform for developing, shipping, and running applications in containers. Containers allow developers to package an application with all its dependencies and ship it as a single unit.\n\n### Benefits of using Docker:\n\n- Consistent environment across different stages of development.\n- Isolation of applications.\n- Efficient resource utilization.\n\n### Key concepts:\n\n- **Images:** Immutable, lightweight, and standalone packages that contain everything needed to run a piece of software, including the code, runtime, libraries, and configuration.\n- **Containers:** Running instances of Docker images.\n- **Dockerfile:** A text file with instructions to build a Docker image.\n- **Docker Hub:** A public registry to find and share container images.\n\n## 2. Installing Docker\n\n### Installing Docker on Windows:\n\n1. Download Docker Desktop from the [Docker website](https://www.docker.com/products/docker-desktop).\n2. Follow the installation instructions.\n3. Verify the installation:\n   ```bash\n   docker --version\n   ```\n\n### Installing Docker on macOS:\n\n1. Download Docker Desktop for Mac.\n2. Follow the installation instructions.\n3. Verify the installation:\n   ```bash\n   docker --version\n   ```\n\n### Installing Docker on Linux:\n\n1. Update your existing list of packages:\n   ```bash\n   sudo apt-get update\n   ```\n2. Install a few prerequisite packages:\n   ```bash\n   sudo apt-get install apt-transport-https ca-certificates curl software-properties-common\n   ```\n3. Add the GPG key for the official Docker repository:\n   ```bash\n   curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -\n   ```\n4. Add the Docker repository to APT sources:\n   ```bash\n   sudo add-apt-repository \"deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable\"\n   ```\n5. Update your package database with the Docker packages from the newly added repo:\n   ```bash\n   sudo apt-get update\n   ```\n6. Install Docker:\n   ```bash\n   sudo apt-get install docker-ce\n   ```\n7. Verify the installation:\n   ```bash\n   docker --version\n   ```\n\n## 3. Docker Architecture\n\n### Docker Engine\n\nThe core component of Docker that creates and manages containers.\n\n### Docker Daemon\n\nRuns on the host machine and listens for Docker API requests to manage Docker objects such as images, containers, networks, and volumes.\n\n### Docker Client\n\nCLI tool that allows users to interact with the Docker daemon.\n\n### Docker Registries\n\nStores Docker images. Docker Hub is a public registry, but you can also set up private registries.\n\n## 4. Working with Docker Images\n\n### Understanding Docker images\n\nImages are the building blocks of containers. They are created from a set of read-only layers.\n\n### Pulling images from Docker Hub\n\n```bash\n    docker pull nginx\n```\n\n### Listing images\n\n```bash\n    docker images\n```\n\n### Removing images\n\n```bash\n    docker rmi \u003cimage_id\u003e\n```\n\n## 5. Creating Docker Images\n\n### Writing a Dockerfile\n\nA Dockerfile is a script containing a series of instructions on how to build a Docker image.\n\n**Example Dockerfile:**\n\n```Dockerfile\n    # Use an official Python runtime as a parent image\n    FROM python:3.8-slim\n\n    # Set the working directory\n    WORKDIR /app\n\n    # Copy the current directory contents into the container at /app\n    COPY . /app\n\n    # Install any needed packages specified in requirements.txt\n    RUN pip install --no-cache-dir -r requirements.txt\n\n    # Make port 80 available to the world outside this container\n    EXPOSE 80\n\n    # Define environment variable\n    ENV NAME World\n\n    # Run app.py when the container launches\n    CMD [\"python\", \"app.py\"]\n```\n\n### Building images from a Dockerfile\n\n```bash\n    docker build -t my-python-app .\n```\n\n### Best practices for writing Dockerfiles\n\n- Keep Dockerfiles small and simple.\n- Use .dockerignore to exclude files and directories from the build context.\n- Leverage caching by ordering Dockerfile instructions from least to most frequently changed.\n\n### Tagging images\n\n```bash\n    docker tag my-python-app myrepo/my-python-app:v1.0\n```\n\n## 6. Docker Containers\n\n### Understanding containers\n\nContainers are lightweight, portable, and self-sufficient units that can run any application.\n\n### Running containers\n\n```bash\n    docker run -d -p 80:80 --name mynginx nginx\n```\n\n### Managing containers (start, stop, restart, remove)\n\n```bash\n    docker start mynginx\n    docker stop mynginx\n    docker restart mynginx\n    docker rm mynginx\n```\n\n### Inspecting containers\n\n```bash\n    docker inspect mynginx\n```\n\n### Attaching to and interacting with containers\n\n```bash\n    docker exec -it mynginx /bin/bash\n```\n\n## 7. Docker Networking\n\n### Overview of Docker networking\n\nDocker networking allows containers to communicate with each other and with the host system.\n\n### Types of Docker networks (bridge, host, overlay, etc.)\n\n- **Bridge:** Default network driver. Containers on the same bridge network can communicate.\n- **Host:** Removes network isolation between the container and the Docker host.\n- **Overlay:** Enables Swarm services to communicate with each other.\n\n### Creating and managing networks\n\n```bash\n    docker network create mynetwork\n    docker network ls\n    docker network rm mynetwork\n```\n\n### Connecting containers to networks\n\n```bash\n    docker network connect mynetwork mynginx\n```\n\n## 8. Docker Volumes and Storage\n\n### Understanding Docker volumes\n\nVolumes are the preferred mechanism for persisting data generated by and used by Docker containers.\n\n### Creating and managing volumes\n\n```bash\n    docker volume create myvolume\n    docker volume ls\n    docker volume rm myvolume\n```\n\n### Mounting volumes in containers\n\n```bash\n    docker run -d -p 80:80 --name mynginx -v myvolume:/data nginx\n```\n\n### Persistent storage in Docker\n\nVolumes provide persistent storage that is independent of the container lifecycle.\n\n## 9. Docker Compose\n\n### Introduction to Docker Compose\n\nDocker Compose is a tool for defining and running multi-container Docker applications.\n\n### Writing `docker-compose.yml` files\n\n```yaml\n    version: '3'\n    services:\n      web:\n        image: nginx\n        ports:\n          - \"80:80\"\n      db:\n        image: postgres\n        environment:\n          POSTGRES_PASSWORD: example\n```\n\n### Building and running multi-container applications with Docker Compose\n\n```bash\n    docker-compose up\n    docker-compose down\n```\n\n### Docker Compose commands\n\n```bash\n    docker-compose build\n    docker-compose start\n    docker-compose stop\n```\n\n## 10. Docker Registry\n\n### Understanding Docker Registry\n\nA storage and distribution system for named Docker images.\n\n### Using Docker Hub\n\nDocker Hub is a cloud-based registry service for sharing Docker images.\n\n### Setting up a private Docker Registry\n\n```bash\n    docker run -d -p 5000:5000 --name registry registry:2\n```\n\n### Pushing and pulling images from a private registry\n\n```bash\n    docker tag my-python-app localhost:5000/my-python-app\n    docker push localhost:5000/my-python-app\n    docker pull localhost:5000/my-python-app\n```\n\n## 11. Dockerizing Applications\n\n### Containerizing a simple web application (e.g., Node.js, Python Flask)\n\n**Example Dockerfile for a Node.js app:**\n\n```Dockerfile\n    FROM node:14\n\n    WORKDIR /app\n\n    COPY package*.json ./\n\n    RUN npm install\n\n    COPY . .\n\n    EXPOSE 3000\n\n    CMD [\"node\", \"app.js\"]\n```\n\n### Best practices for containerizing applications\n\n- Use official base images.\n- Minimize the number of layers.\n- Use multi-stage builds for smaller images.\n\n## 12. Managing Docker Containers\n\n### Using Docker commands for container management\n\n```bash\n    docker ps\n    docker inspect\n    docker logs\n    docker stats\n```\n\n### Monitoring and logging containers\n\n```bash\n    docker logs mynginx\n    docker stats mynginx\n```\n\n### Using tools like `docker stats` and `docker logs`\n\n```bash\n    docker stats\n    docker logs\n```\n\n## 13. Docker Security\n\n### Security best practices\n\n- Run containers as a non-root user.\n- Keep Docker and Docker images up to date.\n- Use trusted images.\n\n### Running containers as non-root users\n\n```Dockerfile\n    FROM node:14\n    USER node\n```\n\n### Securing Docker daemon and network\n\n- Use TLS to secure Docker daemon.\n- Limit container privileges.\n- Use network policies to restrict container communication.\n\n### Scanning images for vulnerabilities\n\nUse tools like Trivy, Clair, and Docker's built-in scanning.\n\n## 14. Advanced Docker Topics\n\n### Docker Swarm and orchestration\n\nDocker Swarm is a container orchestration tool native to Docker.\n\n### Using Docker in CI/CD pipelines\n\nIntegrate Docker with CI/CD tools like Jenkins, GitLab CI, and CircleCI.\n\n### Integrating Docker with Kubernetes\n\nKubernetes is a container orchestration system that extends Docker's capabilities.\n\n### Docker on cloud platforms (AWS, GCP, Azure)\n\nUse Docker with cloud services like AWS ECS, Google Kubernetes Engine, and Azure Container Instances.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fguptaroshan%2Fdocker-topics","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fguptaroshan%2Fdocker-topics","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fguptaroshan%2Fdocker-topics/lists"}