mirror of https://github.com/docker/docs.git
First pass: Get YAML version of Glossary running
This commit is contained in:
parent
76754d2502
commit
eda0c811a4
|
@ -0,0 +1,294 @@
|
|||
glossary:
|
||||
- term: aufs
|
||||
def: |
|
||||
aufs (advanced multi layered unification filesystem) is a Linux [filesystem](#filesystem) that
|
||||
Docker supports as a storage backend. It implements the
|
||||
[union mount](http://en.wikipedia.org/wiki/Union_mount) for Linux file systems.
|
||||
- term: base image
|
||||
def: |
|
||||
An image that has no parent is a **base image**.
|
||||
- term: boot2docker
|
||||
def: |
|
||||
[boot2docker](http://boot2docker.io/) is a lightweight Linux distribution made
|
||||
specifically to run Docker containers. The boot2docker management tool for Mac and Windows was deprecated and replaced by [`docker-machine`](#machine) which you can install with the Docker Toolbox.
|
||||
- term: btrfs
|
||||
def: |
|
||||
btrfs (B-tree file system) is a Linux [filesystem](#filesystem) that Docker
|
||||
supports as a storage backend. It is a [copy-on-write](http://en.wikipedia.org/wiki/Copy-on-write)
|
||||
filesystem.
|
||||
- term: build
|
||||
def: |
|
||||
build is the process of building Docker images using a [Dockerfile](#dockerfile).
|
||||
The build uses a Dockerfile and a "context". The context is the set of files in the
|
||||
directory in which the image is built.
|
||||
- term: cgroups
|
||||
def: |
|
||||
cgroups is a Linux kernel feature that limits, accounts for, and isolates
|
||||
the resource usage (CPU, memory, disk I/O, network, etc.) of a collection
|
||||
of processes. Docker relies on cgroups to control and isolate resource limits.
|
||||
|
||||
*Also known as : control groups*
|
||||
- term: Compose
|
||||
def: |
|
||||
[Compose](https://github.com/docker/compose) is a tool for defining and
|
||||
running complex applications with Docker. With compose, you define a
|
||||
multi-container application in a single file, then spin your
|
||||
application up in a single command which does everything that needs to
|
||||
be done to get it running.
|
||||
|
||||
*Also known as : docker-compose, fig*
|
||||
- term: copy-on-write
|
||||
def: |
|
||||
Docker uses a
|
||||
[copy-on-write](/engine/userguide/storagedriver/imagesandcontainers/#/the-copy-on-write-strategy)
|
||||
technique and a [union file system](#union-file-system) for both images and
|
||||
containers to optimize resources and speed performance. Multiple copies of an
|
||||
entity share the same instance and each one makes only specific changes to its
|
||||
unique layer.
|
||||
|
||||
Multiple containers can share access to the same image, and make
|
||||
container-specific changes on a writable layer which is deleted when
|
||||
the container is removed. This speeds up container start times and performance.
|
||||
|
||||
Images are essentially layers of filesystems typically predicated on a base
|
||||
image under a writable layer, and built up with layers of differences from the
|
||||
base image. This minimizes the footprint of the image and enables shared
|
||||
development.
|
||||
|
||||
For more about copy-on-write in the context of Docker, see [Understand images,
|
||||
containers, and storage
|
||||
drivers](/engine/userguide/storagedriver/imagesandcontainers/).
|
||||
- term: container
|
||||
def: |
|
||||
A container is a runtime instance of a [docker image](#image).
|
||||
|
||||
A Docker container consists of
|
||||
|
||||
- A Docker image
|
||||
- Execution environment
|
||||
- A standard set of instructions
|
||||
|
||||
The concept is borrowed from Shipping Containers, which define a standard to ship
|
||||
goods globally. Docker defines a standard to ship software.
|
||||
- term: data volume
|
||||
def: |
|
||||
A data volume is a specially-designated directory within one or more containers
|
||||
that bypasses the Union File System. Data volumes are designed to persist data,
|
||||
independent of the container's life cycle. Docker therefore never automatically
|
||||
delete volumes when you remove a container, nor will it "garbage collect"
|
||||
volumes that are no longer referenced by a container.
|
||||
- term: Docker
|
||||
def: |
|
||||
The term Docker can refer to
|
||||
|
||||
- The Docker project as a whole, which is a platform for developers and sysadmins to
|
||||
develop, ship, and run applications
|
||||
- The docker daemon process running on the host which manages images and containers
|
||||
- term: Docker for Mac
|
||||
def: |
|
||||
[Docker for Mac](/docker-for-mac/) is an easy-to-install,
|
||||
lightweight Docker development environment designed specifically for the Mac. A
|
||||
native Mac application, Docker for Mac uses the macOS Hypervisor framework,
|
||||
networking, and filesystem. It's the best solution if you want to build, debug,
|
||||
test, package, and ship Dockerized applications on a Mac. Docker for Mac
|
||||
supersedes [Docker Toolbox](#toolbox) as state-of-the-art Docker on macOS.
|
||||
- term: Docker for Windows
|
||||
def: |
|
||||
[Docker for Windows](/docker-for-windows/) is an
|
||||
easy-to-install, lightweight Docker development environment designed
|
||||
specifically for Windows 10 systems that support Microsoft Hyper-V
|
||||
(Professional, Enterprise and Education). Docker for Windows uses Hyper-V for
|
||||
virtualization, and runs as a native Windows app. It works with Windows Server
|
||||
2016, and gives you the ability to set up and run Windows containers as well as
|
||||
the standard Linux containers, with an option to switch between the two. Docker
|
||||
for Windows is the best solution if you want to build, debug, test, package, and
|
||||
ship Dockerized applications from Windows machines. Docker for Windows
|
||||
supersedes [Docker Toolbox](#toolbox) as state-of-the-art Docker on Windows.
|
||||
- term: Docker Hub
|
||||
def: |
|
||||
The [Docker Hub](https://hub.docker.com/) is a centralized resource for working with
|
||||
Docker and its components. It provides the following services:
|
||||
|
||||
- Docker image hosting
|
||||
- User authentication
|
||||
- Automated image builds and work-flow tools such as build triggers and web hooks
|
||||
- Integration with GitHub and Bitbucket
|
||||
- term: Dockerfile
|
||||
def: |
|
||||
A Dockerfile is a text document that contains all the commands you would
|
||||
normally execute manually in order to build a Docker image. Docker can
|
||||
build images automatically by reading the instructions from a Dockerfile.
|
||||
- term: filesystem
|
||||
def: |
|
||||
A file system is the method an operating system uses to name files
|
||||
and assign them locations for efficient storage and retrieval.
|
||||
|
||||
Examples :
|
||||
|
||||
- Linux : ext4, aufs, btrfs, zfs
|
||||
- Windows : NTFS
|
||||
- macOS : HFS+
|
||||
- term: image
|
||||
def: |
|
||||
Docker images are the basis of [containers](#container). An Image is an
|
||||
ordered collection of root filesystem changes and the corresponding
|
||||
execution parameters for use within a container runtime. An image typically
|
||||
contains a union of layered filesystems stacked on top of each other. An image
|
||||
does not have state and it never changes.
|
||||
- term: libcontainer
|
||||
def: |
|
||||
libcontainer provides a native Go implementation for creating containers with
|
||||
namespaces, cgroups, capabilities, and filesystem access controls. It allows
|
||||
you to manage the lifecycle of the container performing additional operations
|
||||
after the container is created.
|
||||
- term: libnetwork
|
||||
def: |
|
||||
libnetwork provides a native Go implementation for creating and managing container
|
||||
network namespaces and other network resources. It manage the networking lifecycle
|
||||
of the container performing additional operations after the container is created.
|
||||
- term: link
|
||||
def: |
|
||||
links provide a legacy interface to connect Docker containers running on the
|
||||
same host to each other without exposing the hosts' network ports. Use the
|
||||
Docker networks feature instead.
|
||||
- term: Machine
|
||||
def: |
|
||||
[Machine](https://github.com/docker/machine) is a Docker tool which
|
||||
makes it really easy to create Docker hosts on your computer, on
|
||||
cloud providers and inside your own data center. It creates servers,
|
||||
installs Docker on them, then configures the Docker client to talk to them.
|
||||
|
||||
*Also known as : docker-machine*
|
||||
- term: node
|
||||
def: |
|
||||
A [node](/engine/swarm/how-swarm-mode-works/nodes/) is a physical or virtual
|
||||
machine running an instance of the Docker Engine in swarm mode.
|
||||
|
||||
**Manager nodes** perform swarm management and orchestration duties. By default
|
||||
manager nodes are also worker nodes.
|
||||
|
||||
**Worker nodes** execute tasks.
|
||||
- term: overlay network driver
|
||||
def: |
|
||||
Overlay network driver provides out of the box multi-host network connectivity
|
||||
for docker containers in a cluster.
|
||||
- term: overlay storage driver
|
||||
def: |
|
||||
OverlayFS is a [filesystem](#filesystem) service for Linux which implements a
|
||||
[union mount](http://en.wikipedia.org/wiki/Union_mount) for other file systems.
|
||||
It is supported by the Docker daemon as a storage driver.
|
||||
- term: registry
|
||||
def: |
|
||||
A Registry is a hosted service containing [repositories](#repository) of [images](#image)
|
||||
which responds to the Registry API.
|
||||
|
||||
The default registry can be accessed using a browser at [Docker Hub](#docker-hub)
|
||||
or using the `docker search` command.
|
||||
- term: repository
|
||||
def: |
|
||||
A repository is a set of Docker images. A repository can be shared by pushing it
|
||||
to a [registry](#registry) server. The different images in the repository can be
|
||||
labeled using [tags](#tag).
|
||||
|
||||
Here is an example of the shared [nginx repository](https://hub.docker.com/_/nginx/)
|
||||
and its [tags](https://hub.docker.com/r/library/nginx/tags/)
|
||||
- term: service
|
||||
def: |
|
||||
A [service](/engine/swarm/how-swarm-mode-works/services/) is the definition of how
|
||||
you want to run your application containers in a swarm. At the most basic level
|
||||
a service defines which container image to run in the swarm and which commands
|
||||
to run in the container. For orchestration purposes, the service defines the
|
||||
"desired state", meaning how many containers to run as tasks and constraints for
|
||||
deploying the containers.
|
||||
|
||||
Frequently a service is a microservice within the context of some larger
|
||||
application. Examples of services might include an HTTP server, a database, or
|
||||
any other type of executable program that you wish to run in a distributed
|
||||
environment.
|
||||
- term: service discovery
|
||||
def: |
|
||||
Swarm mode [service discovery](/engine/swarm/networking/#use-swarm-mode-service-discovery) is a DNS component
|
||||
internal to the swarm that automatically assigns each service on an overlay
|
||||
network in the swarm a VIP and DNS entry. Containers on the network share DNS
|
||||
mappings for the service via gossip so any container on the network can access
|
||||
the service via its service name.
|
||||
|
||||
You don’t need to expose service-specific ports to make the service available to
|
||||
other services on the same overlay network. The swarm’s internal load balancer
|
||||
automatically distributes requests to the service VIP among the active tasks.
|
||||
- term: swarm
|
||||
def: |
|
||||
A [swarm](/engine/swarm/) is a cluster of one or more Docker Engines running in [swarm mode](#swarm-mode).
|
||||
- term: Docker Swarm
|
||||
def: |
|
||||
Do not confuse [Docker Swarm](https://github.com/docker/swarm) with the [swarm mode](#swarm-mode) features in Docker Engine.
|
||||
|
||||
Docker Swarm is the name of a standalone native clustering tool for Docker.
|
||||
Docker Swarm pools together several Docker hosts and exposes them as a single
|
||||
virtual Docker host. It serves the standard Docker API, so any tool that already
|
||||
works with Docker can now transparently scale up to multiple hosts.
|
||||
|
||||
*Also known as : docker-swarm*
|
||||
- term: swarm mode
|
||||
def: |
|
||||
[Swarm mode](/engine/swarm/) refers to cluster management and orchestration
|
||||
features embedded in Docker Engine. When you initialize a new swarm (cluster) or
|
||||
join nodes to a swarm, the Docker Engine runs in swarm mode.
|
||||
- term: tag
|
||||
def: |
|
||||
A tag is a label applied to a Docker image in a [repository](#repository).
|
||||
tags are how various images in a repository are distinguished from each other.
|
||||
|
||||
*Note : This label is not related to the key=value labels set for docker daemon*
|
||||
- term: task
|
||||
def: |
|
||||
A [task](/engine/swarm/how-swarm-mode-works/services/#/tasks-and-scheduling) is the
|
||||
atomic unit of scheduling within a swarm. A task carries a Docker container and
|
||||
the commands to run inside the container. Manager nodes assign tasks to worker
|
||||
nodes according to the number of replicas set in the service scale.
|
||||
|
||||
The diagram below illustrates the relationship of services to tasks and
|
||||
containers.
|
||||
|
||||

|
||||
- term: Toolbox
|
||||
def: |
|
||||
[Docker Toolbox](/toolbox/overview/) is a legacy
|
||||
installer for Mac and Windows users. It uses Oracle VirtualBox for
|
||||
virtualization.
|
||||
|
||||
For Macs running OS X El Capitan 10.11 and newer macOS releases, [Docker for
|
||||
Mac](/docker-for-mac/) is the better solution.
|
||||
|
||||
For Windows 10 systems that support Microsoft Hyper-V (Professional, Enterprise
|
||||
and Education), [Docker for
|
||||
Windows](/docker-for-windows/) is the better solution.
|
||||
- term: Union file system
|
||||
def: |
|
||||
Union file systems implement a [union
|
||||
mount](https://en.wikipedia.org/wiki/Union_mount) and operate by creating
|
||||
layers. Docker uses union file systems in conjunction with
|
||||
[copy-on-write](#copy-on-write) techniques to provide the building blocks for
|
||||
containers, making them very lightweight and fast.
|
||||
|
||||
For more on Docker and union file systems, see [Docker and AUFS in
|
||||
practice](/engine/userguide/storagedriver/aufs-driver/),
|
||||
[Docker and Btrfs in
|
||||
practice](/engine/userguide/storagedriver/btrfs-driver/),
|
||||
and [Docker and OverlayFS in
|
||||
practice](/engine/userguide/storagedriver/overlayfs-driver/)
|
||||
|
||||
Example implementations of union file systems are
|
||||
[UnionFS](https://en.wikipedia.org/wiki/UnionFS),
|
||||
[AUFS](https://en.wikipedia.org/wiki/Aufs), and
|
||||
[Btrfs](https://btrfs.wiki.kernel.org/index.php/Main_Page).
|
||||
- term: virtual machine
|
||||
def: |
|
||||
A virtual machine is a program that emulates a complete computer and imitates dedicated hardware.
|
||||
It shares physical hardware resources with other users but isolates the operating system. The
|
||||
end user has the same experience on a Virtual Machine as they would have on dedicated hardware.
|
||||
|
||||
Compared to containers, a virtual machine is heavier to run, provides more isolation,
|
||||
gets its own set of resources and does minimal sharing.
|
||||
|
||||
*Also known as : VM*
|
339
glossary.md
339
glossary.md
|
@ -2,339 +2,12 @@
|
|||
title: "Docker Glossary"
|
||||
description: "Glossary of terms used around Docker"
|
||||
keywords: "glossary, docker, terms, definitions"
|
||||
notoc: true
|
||||
skip-right-nav: true
|
||||
---
|
||||
{% for entry in site.data.glossary.glossary %}
|
||||
## {{ entry.term }}
|
||||
|
||||
## aufs
|
||||
{{ entry.def }}
|
||||
|
||||
aufs (advanced multi layered unification filesystem) is a Linux [filesystem](#filesystem) that
|
||||
Docker supports as a storage backend. It implements the
|
||||
[union mount](http://en.wikipedia.org/wiki/Union_mount) for Linux file systems.
|
||||
|
||||
## base image
|
||||
|
||||
An image that has no parent is a **base image**.
|
||||
|
||||
## boot2docker
|
||||
|
||||
[boot2docker](http://boot2docker.io/) is a lightweight Linux distribution made
|
||||
specifically to run Docker containers. The boot2docker management tool for Mac and Windows was deprecated and replaced by [`docker-machine`](#machine) which you can install with the Docker Toolbox.
|
||||
|
||||
## btrfs
|
||||
|
||||
btrfs (B-tree file system) is a Linux [filesystem](#filesystem) that Docker
|
||||
supports as a storage backend. It is a [copy-on-write](http://en.wikipedia.org/wiki/Copy-on-write)
|
||||
filesystem.
|
||||
|
||||
## build
|
||||
|
||||
build is the process of building Docker images using a [Dockerfile](#dockerfile).
|
||||
The build uses a Dockerfile and a "context". The context is the set of files in the
|
||||
directory in which the image is built.
|
||||
|
||||
## cgroups
|
||||
|
||||
cgroups is a Linux kernel feature that limits, accounts for, and isolates
|
||||
the resource usage (CPU, memory, disk I/O, network, etc.) of a collection
|
||||
of processes. Docker relies on cgroups to control and isolate resource limits.
|
||||
|
||||
*Also known as : control groups*
|
||||
|
||||
## Compose
|
||||
|
||||
[Compose](https://github.com/docker/compose) is a tool for defining and
|
||||
running complex applications with Docker. With compose, you define a
|
||||
multi-container application in a single file, then spin your
|
||||
application up in a single command which does everything that needs to
|
||||
be done to get it running.
|
||||
|
||||
*Also known as : docker-compose, fig*
|
||||
|
||||
## copy-on-write
|
||||
|
||||
Docker uses a
|
||||
[copy-on-write](https://docs.docker.com/engine/userguide/storagedriver/imagesandcontainers/#/the-copy-on-write-strategy)
|
||||
technique and a [union file system](#union-file-system) for both images and
|
||||
containers to optimize resources and speed performance. Multiple copies of an
|
||||
entity share the same instance and each one makes only specific changes to its
|
||||
unique layer.
|
||||
|
||||
Multiple containers can share access to the same image, and make
|
||||
container-specific changes on a writable layer which is deleted when
|
||||
the container is removed. This speeds up container start times and performance.
|
||||
|
||||
Images are essentially layers of filesystems typically predicated on a base
|
||||
image under a writable layer, and built up with layers of differences from the
|
||||
base image. This minimizes the footprint of the image and enables shared
|
||||
development.
|
||||
|
||||
For more about copy-on-write in the context of Docker, see [Understand images,
|
||||
containers, and storage
|
||||
drivers](https://docs.docker.com/engine/userguide/storagedriver/imagesandcontainers/).
|
||||
|
||||
## container
|
||||
|
||||
A container is a runtime instance of a [docker image](#image).
|
||||
|
||||
A Docker container consists of
|
||||
|
||||
- A Docker image
|
||||
- Execution environment
|
||||
- A standard set of instructions
|
||||
|
||||
The concept is borrowed from Shipping Containers, which define a standard to ship
|
||||
goods globally. Docker defines a standard to ship software.
|
||||
|
||||
## data volume
|
||||
|
||||
A data volume is a specially-designated directory within one or more containers
|
||||
that bypasses the Union File System. Data volumes are designed to persist data,
|
||||
independent of the container's life cycle. Docker therefore never automatically
|
||||
delete volumes when you remove a container, nor will it "garbage collect"
|
||||
volumes that are no longer referenced by a container.
|
||||
|
||||
|
||||
## Docker
|
||||
|
||||
The term Docker can refer to
|
||||
|
||||
- The Docker project as a whole, which is a platform for developers and sysadmins to
|
||||
develop, ship, and run applications
|
||||
- The docker daemon process running on the host which manages images and containers
|
||||
|
||||
|
||||
## Docker for Mac
|
||||
|
||||
[Docker for Mac](https://docs.docker.com/docker-for-mac/) is an easy-to-install,
|
||||
lightweight Docker development environment designed specifically for the Mac. A
|
||||
native Mac application, Docker for Mac uses the macOS Hypervisor framework,
|
||||
networking, and filesystem. It's the best solution if you want to build, debug,
|
||||
test, package, and ship Dockerized applications on a Mac. Docker for Mac
|
||||
supersedes [Docker Toolbox](#toolbox) as state-of-the-art Docker on macOS.
|
||||
|
||||
|
||||
## Docker for Windows
|
||||
|
||||
[Docker for Windows](https://docs.docker.com/docker-for-windows/) is an
|
||||
easy-to-install, lightweight Docker development environment designed
|
||||
specifically for Windows 10 systems that support Microsoft Hyper-V
|
||||
(Professional, Enterprise and Education). Docker for Windows uses Hyper-V for
|
||||
virtualization, and runs as a native Windows app. It works with Windows Server
|
||||
2016, and gives you the ability to set up and run Windows containers as well as
|
||||
the standard Linux containers, with an option to switch between the two. Docker
|
||||
for Windows is the best solution if you want to build, debug, test, package, and
|
||||
ship Dockerized applications from Windows machines. Docker for Windows
|
||||
supersedes [Docker Toolbox](#toolbox) as state-of-the-art Docker on Windows.
|
||||
|
||||
## Docker Hub
|
||||
|
||||
The [Docker Hub](https://hub.docker.com/) is a centralized resource for working with
|
||||
Docker and its components. It provides the following services:
|
||||
|
||||
- Docker image hosting
|
||||
- User authentication
|
||||
- Automated image builds and work-flow tools such as build triggers and web hooks
|
||||
- Integration with GitHub and Bitbucket
|
||||
|
||||
|
||||
## Dockerfile
|
||||
|
||||
A Dockerfile is a text document that contains all the commands you would
|
||||
normally execute manually in order to build a Docker image. Docker can
|
||||
build images automatically by reading the instructions from a Dockerfile.
|
||||
|
||||
## filesystem
|
||||
|
||||
A file system is the method an operating system uses to name files
|
||||
and assign them locations for efficient storage and retrieval.
|
||||
|
||||
Examples :
|
||||
|
||||
- Linux : ext4, aufs, btrfs, zfs
|
||||
- Windows : NTFS
|
||||
- macOS : HFS+
|
||||
|
||||
## image
|
||||
|
||||
Docker images are the basis of [containers](#container). An Image is an
|
||||
ordered collection of root filesystem changes and the corresponding
|
||||
execution parameters for use within a container runtime. An image typically
|
||||
contains a union of layered filesystems stacked on top of each other. An image
|
||||
does not have state and it never changes.
|
||||
|
||||
## libcontainer
|
||||
|
||||
libcontainer provides a native Go implementation for creating containers with
|
||||
namespaces, cgroups, capabilities, and filesystem access controls. It allows
|
||||
you to manage the lifecycle of the container performing additional operations
|
||||
after the container is created.
|
||||
|
||||
## libnetwork
|
||||
|
||||
libnetwork provides a native Go implementation for creating and managing container
|
||||
network namespaces and other network resources. It manage the networking lifecycle
|
||||
of the container performing additional operations after the container is created.
|
||||
|
||||
## link
|
||||
|
||||
links provide a legacy interface to connect Docker containers running on the
|
||||
same host to each other without exposing the hosts' network ports. Use the
|
||||
Docker networks feature instead.
|
||||
|
||||
## Machine
|
||||
|
||||
[Machine](https://github.com/docker/machine) is a Docker tool which
|
||||
makes it really easy to create Docker hosts on your computer, on
|
||||
cloud providers and inside your own data center. It creates servers,
|
||||
installs Docker on them, then configures the Docker client to talk to them.
|
||||
|
||||
*Also known as : docker-machine*
|
||||
|
||||
## node
|
||||
|
||||
A [node](https://docs.docker.com/engine/swarm/how-swarm-mode-works/nodes/) is a physical or virtual
|
||||
machine running an instance of the Docker Engine in swarm mode.
|
||||
|
||||
**Manager nodes** perform swarm management and orchestration duties. By default
|
||||
manager nodes are also worker nodes.
|
||||
|
||||
**Worker nodes** execute tasks.
|
||||
|
||||
## overlay network driver
|
||||
|
||||
Overlay network driver provides out of the box multi-host network connectivity
|
||||
for docker containers in a cluster.
|
||||
|
||||
## overlay storage driver
|
||||
|
||||
OverlayFS is a [filesystem](#filesystem) service for Linux which implements a
|
||||
[union mount](http://en.wikipedia.org/wiki/Union_mount) for other file systems.
|
||||
It is supported by the Docker daemon as a storage driver.
|
||||
|
||||
## registry
|
||||
|
||||
A Registry is a hosted service containing [repositories](#repository) of [images](#image)
|
||||
which responds to the Registry API.
|
||||
|
||||
The default registry can be accessed using a browser at [Docker Hub](#docker-hub)
|
||||
or using the `docker search` command.
|
||||
|
||||
## repository
|
||||
|
||||
A repository is a set of Docker images. A repository can be shared by pushing it
|
||||
to a [registry](#registry) server. The different images in the repository can be
|
||||
labeled using [tags](#tag).
|
||||
|
||||
Here is an example of the shared [nginx repository](https://hub.docker.com/_/nginx/)
|
||||
and its [tags](https://hub.docker.com/r/library/nginx/tags/)
|
||||
|
||||
|
||||
## service
|
||||
|
||||
A [service](https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/) is the definition of how
|
||||
you want to run your application containers in a swarm. At the most basic level
|
||||
a service defines which container image to run in the swarm and which commands
|
||||
to run in the container. For orchestration purposes, the service defines the
|
||||
"desired state", meaning how many containers to run as tasks and constraints for
|
||||
deploying the containers.
|
||||
|
||||
Frequently a service is a microservice within the context of some larger
|
||||
application. Examples of services might include an HTTP server, a database, or
|
||||
any other type of executable program that you wish to run in a distributed
|
||||
environment.
|
||||
|
||||
## service discovery
|
||||
|
||||
Swarm mode [service discovery](https://docs.docker.com/engine/swarm/networking/#use-swarm-mode-service-discovery) is a DNS component
|
||||
internal to the swarm that automatically assigns each service on an overlay
|
||||
network in the swarm a VIP and DNS entry. Containers on the network share DNS
|
||||
mappings for the service via gossip so any container on the network can access
|
||||
the service via its service name.
|
||||
|
||||
You don’t need to expose service-specific ports to make the service available to
|
||||
other services on the same overlay network. The swarm’s internal load balancer
|
||||
automatically distributes requests to the service VIP among the active tasks.
|
||||
|
||||
## swarm
|
||||
|
||||
A [swarm](https://docs.docker.com/engine/swarm/) is a cluster of one or more Docker Engines running in [swarm mode](#swarm-mode).
|
||||
|
||||
## Docker Swarm
|
||||
|
||||
Do not confuse [Docker Swarm](https://github.com/docker/swarm) with the [swarm mode](#swarm-mode) features in Docker Engine.
|
||||
|
||||
Docker Swarm is the name of a standalone native clustering tool for Docker.
|
||||
Docker Swarm pools together several Docker hosts and exposes them as a single
|
||||
virtual Docker host. It serves the standard Docker API, so any tool that already
|
||||
works with Docker can now transparently scale up to multiple hosts.
|
||||
|
||||
*Also known as : docker-swarm*
|
||||
|
||||
## swarm mode
|
||||
|
||||
[Swarm mode](https://docs.docker.com/engine/swarm/) refers to cluster management and orchestration
|
||||
features embedded in Docker Engine. When you initialize a new swarm (cluster) or
|
||||
join nodes to a swarm, the Docker Engine runs in swarm mode.
|
||||
|
||||
## tag
|
||||
|
||||
A tag is a label applied to a Docker image in a [repository](#repository).
|
||||
tags are how various images in a repository are distinguished from each other.
|
||||
|
||||
*Note : This label is not related to the key=value labels set for docker daemon*
|
||||
|
||||
## task
|
||||
|
||||
A [task](https://docs.docker.com/engine/swarm/how-swarm-mode-works/services/#/tasks-and-scheduling) is the
|
||||
atomic unit of scheduling within a swarm. A task carries a Docker container and
|
||||
the commands to run inside the container. Manager nodes assign tasks to worker
|
||||
nodes according to the number of replicas set in the service scale.
|
||||
|
||||
The diagram below illustrates the relationship of services to tasks and
|
||||
containers.
|
||||
|
||||

|
||||
|
||||
## Toolbox
|
||||
|
||||
[Docker Toolbox](https://docs.docker.com/toolbox/overview/) is a legacy
|
||||
installer for Mac and Windows users. It uses Oracle VirtualBox for
|
||||
virtualization.
|
||||
|
||||
For Macs running OS X El Capitan 10.11 and newer macOS releases, [Docker for
|
||||
Mac](https://docs.docker.com/docker-for-mac/) is the better solution.
|
||||
|
||||
For Windows 10 systems that support Microsoft Hyper-V (Professional, Enterprise
|
||||
and Education), [Docker for
|
||||
Windows](https://docs.docker.com/docker-for-windows/) is the better solution.
|
||||
|
||||
## Union file system
|
||||
|
||||
Union file systems implement a [union
|
||||
mount](https://en.wikipedia.org/wiki/Union_mount) and operate by creating
|
||||
layers. Docker uses union file systems in conjunction with
|
||||
[copy-on-write](#copy-on-write) techniques to provide the building blocks for
|
||||
containers, making them very lightweight and fast.
|
||||
|
||||
For more on Docker and union file systems, see [Docker and AUFS in
|
||||
practice](https://docs.docker.com/engine/userguide/storagedriver/aufs-driver/),
|
||||
[Docker and Btrfs in
|
||||
practice](https://docs.docker.com/engine/userguide/storagedriver/btrfs-driver/),
|
||||
and [Docker and OverlayFS in
|
||||
practice](https://docs.docker.com/engine/userguide/storagedriver/overlayfs-driver/)
|
||||
|
||||
Example implementations of union file systems are
|
||||
[UnionFS](https://en.wikipedia.org/wiki/UnionFS),
|
||||
[AUFS](https://en.wikipedia.org/wiki/Aufs), and
|
||||
[Btrfs](https://btrfs.wiki.kernel.org/index.php/Main_Page).
|
||||
|
||||
## virtual machine
|
||||
|
||||
A virtual machine is a program that emulates a complete computer and imitates dedicated hardware.
|
||||
It shares physical hardware resources with other users but isolates the operating system. The
|
||||
end user has the same experience on a Virtual Machine as they would have on dedicated hardware.
|
||||
|
||||
Compared to containers, a virtual machine is heavier to run, provides more isolation,
|
||||
gets its own set of resources and does minimal sharing.
|
||||
|
||||
*Also known as : VM*
|
||||
<span id="related-{{ forloop.index }}" style="display:none" class="relatedGlossary">{{ entry.term }}</span>
|
||||
{% endfor %}
|
||||
|
|
14
js/menu.js
14
js/menu.js
|
@ -1,4 +1,6 @@
|
|||
// structure that includes every page's title, url, description, and keywords
|
||||
var metadata;
|
||||
// search autocomplete vars
|
||||
var autoCompleteShowing = false;
|
||||
var displayingAutcompleteResults = new Array();
|
||||
var autoCompleteShowingID = 0;
|
||||
|
@ -9,6 +11,17 @@ var scoreForTitleMatch = 10;
|
|||
var scoreForURLMatch = 5;
|
||||
var scoreForKeywordMatch = 3;
|
||||
var scoreForDescriptionMatch = 1
|
||||
|
||||
function glossaryCheck() {
|
||||
if (window.location.href.indexOf("/glossary/") > -1)
|
||||
{
|
||||
// you're viewing the glossary; load related topics for each entry
|
||||
$(".relatedGlossary").each(function(){
|
||||
console.log(this);
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
function addResult(topic, matchesTitle, matchesDescription, matchesURL, matchesKeywords)
|
||||
{
|
||||
var matchScore = (matchesTitle * scoreForTitleMatch) + (matchesDescription * scoreForDescriptionMatch) + (matchesURL * scoreForURLMatch) + (matchesKeywords * scoreForKeywordMatch);
|
||||
|
@ -195,5 +208,6 @@ jQuery(document).ready(function(){
|
|||
$.getJSON( "/metadata.txt", function( data ) {
|
||||
metadata = data;
|
||||
hookupTOCEvents();
|
||||
glossaryCheck();
|
||||
});
|
||||
});
|
||||
|
|
Loading…
Reference in New Issue