Docker internals
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This document discusses Docker internals and components. It covers: 1. Docker provides build once, configure once capabilities to deploy applications everywhere reliably, consistently, efficiently and cheaply. 2. Docker components include the Docker daemon, libcontainer, cgroups, namespaces, AUFS/BTRFS/dm-thinp, and the kernel-userspace interface. 3. Docker uses filesystem isolation through layering, copy-on-write, caching and differencing using union filesystems like AUFS to provide efficient sharing of files between containers.
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Docker is a platform for building, distributing and running containerized applications. It allows applications to be bundled with their dependencies and run in isolated containers that share the same operating system kernel. Kubernetes is an open-source system for automating deployment, scaling, and management of containerized applications. It groups Docker containers that make up an application into logical units for easy management and discovery. Docker Swarm is a native clustering tool that can orchestrate and schedule containers on machine clusters. It allows Docker containers to run as a cluster on multiple Docker hosts.Docker navjot kaur
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Understanding the difference between Docker and Virtualization. Here is the detailed information for a better insight to when Dockers or Virtualization can be used. Docker and containers - Presentation 際際滷s by Priyadarshini Anand
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The document provides an overview of Docker containers and how to get started with Docker. It discusses what containers are, how Docker works, the differences between containers and VMs, and how to use basic Docker commands. It also covers creating Docker images using Dockerfiles and provides examples of common Dockerfile commands.Hands on introduction to docker security for docker newbies
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Introducing Docker and demonstrating hands-on some of the security issues related to Docker. This presentation accompanied the demonstrations.Docker training
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This document provides an overview of Docker and containers for data science. It begins with definitions of containers and discusses the history and benefits of containers. It then explains how Docker containers work using namespaces, cgroups, and union file systems. Key Docker concepts are introduced like Dockerfiles, images, containers, and the Docker architecture. Practical examples are given for building simple machine learning models and databases in containers. Advanced topics covered include Docker Compose, DevOps workflows, continuous delivery, and Kubernetes. The document is intended to provide data scientists with an introduction to using Docker for their work.Docker for mere mortals
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This document discusses Docker, including:
1. Docker is a platform for running and managing Linux containers that provides operating-system-level virtualization without the overhead of traditional virtual machines.
2. Key Docker concepts include images (immutable templates for containers), containers (running instances of images that have mutable state), and layers (the building blocks of images).
3. Publishing Docker images to registries allows them to be shared and reused across different systems. Volumes and networking allow containers to share filesystems and communicate.Docker London: Container Security
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This document summarizes a presentation on container security given by Phil Estes. It identifies several threat vectors for containers including risks from individual containers, interactions between containers, external attacks, and application security issues. It then outlines various security tools and features in Docker like cgroups, Linux Security Modules, capabilities, seccomp, and user namespaces that can help mitigate these threats. Finally, it discusses some future directions for improving container security through more secure defaults, image signing, and network security enhancements.More from Rohit Jnagal (7)
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This document discusses Google's use of CRIU for task migration at scale. It provides background on Borg, Google's cluster management system, and how tasks run in isolated containers. CRIU is used to checkpoint and restore task state, allowing tasks to be migrated transparently to avoid evictions. While migrations currently take 1-2 minutes, work is ongoing to improve performance and implement live migration to support latency-sensitive tasks. Security around CRIU's use of privileges is also an area of focus. Overall, CRIU has worked well but continued collaboration is needed to address remaining challenges.Memory Bandwidth QoS
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Container monitoring for resource and application metrics with cAdvisor. Shipping monitoring information with the container so it is monitored irrespective of the host it runs on.
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This document introduces Kubernetes, an open-source system for automating deployment, scaling, and management of containerized applications. It was developed at Google based on their 15+ years of running production workloads in containers. Kubernetes can manage applications running on virtual machines, bare metal, public or private cloud providers. It uses a declarative model where users specify the desired state and Kubernetes ensures the actual state matches it. Key concepts include pods, replication controllers, services, labels/selectors, and monitoring/logging addons.Docker n co
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This document discusses several new features in Docker 1.5 including relative ADD/COPY commands and faster docker push. It also summarizes Docker Machine for provisioning Docker hosts on cloud providers, Docker Swarm for clustering Docker daemons, and the use of systemd to manage containers as pods. Demos are provided for using smaller base images like Alpine, Docker Machine, Docker Swarm, and systemd-based container management.Docker Overview
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This document provides an overview of Docker including:
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- Key Docker components include images, resource isolation using cgroups and namespaces, filesystem isolation using layers, and networking capabilities.
- Under the hood, Docker utilizes cgroups for resource accounting, namespaces for isolation, security features like capabilities and AppArmor, and UnionFS for the layered filesystem.
- The Docker codebase includes components for the daemon, API, image and container management, networking, and integration testing. Commonly used packages include libcontainer for namespaces and cgroups and packages for security, mounting, and networking.Recently uploaded (20)
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- 1. Docker Internals Docker Meetup, Mountain View Rohit Jnagal
- 2. jnagal@ Containers @ Google Containers at scale. Resource Isolation. lmctfy cAdvisor libcontainer Kubernetes
- 3. Docker 101 Build Once, Configure Once. Deploy Everything* Everywhere* Reliably & Consistently Efficiently Cheaply
- 4. Docker Components Docker Daemon Libcontainer cgroups namespaces AUFS BTRFS dm-thinp VFS KernelUserSpace
- 6. Docker Grounds up: Filesystem File-system Isolation: Building a rootfs dir and chroot into it. With mount namespace, use pivot-root. Features: Layering, CoW, Caching, Diffing Solutions: UnionFS, Snapshotting FS, VFS AUFS in action
- 7. Filesystem Layer 2 Layer 1 Base Image Writable Layer Container Layer 1 Base Image Writable Layer Container Snapshot Container A Container B Writable Layer A Writable Layer B Layer 2 (e.g. Configuration) Layer 1 (e.g. MySQL) Base Image (e.g. Ubuntu) S h a r e d P r i v
- 8. Docker Grounds up: Filesystem From: J辿r担me Petazzoni
- 9. Docker Grounds up: Namespaces Process trees. Mounts. Network. User accounts. Hostnames. Inter-process communication. pid_t pid = clone(..., flags, ...) CLONE_NEWUTS hostname, domainname CLONE_NEWIPC IPC objects CLONE_NEWPID Process IDs CLONE_NEWNET Network configuration CLONE_NEWNS File system mounts CLONE_NEWUSER User and Group IDs setns(int fd, int nstype) CLONE_NEWIPC CLONE_NEWNET CLONE_NEWUTS Also: unshare(flags)
- 10. Docker Grounds up: Resource Isolation Cgroups : Isolation and accounting cpu memory block i/o devices network numa freezer image credit: mairin
- 11. Docker Grounds up: Add Security Security Layers Linux Capabilities. User namespaces: Unprivileged users. nosuid & ro mounts. Seccomp-bpf GRSEC and PAX Device cgroups Access Control: SELinux & AppArmor Future: Namespace aware sys/proc image credit: Leo Reynolds