Compose
About versions and upgrading (Compose)
ASP.NET Core + SQL Server on Linux (Compose)
CLI environment variables (Compose)
Command-line completion (Compose)
Compose（组成）
Compose command-line reference（组合命令行参考）
Control startup order (Compose)
Django and PostgreSQL (Compose)
Docker stacks and distributed application bundles (Compose)
docker-compose build（docker-compose构建）
docker-compose bundle
docker-compose config
docker-compose create
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docker-compose events
docker-compose exec
docker-compose help
docker-compose images
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docker-compose restart
docker-compose rm
docker-compose run
docker-compose scale
docker-compose start
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docker-compose top
docker-compose unpause
docker-compose up
Environment file (Compose)
Environment variables in Compose
Extend services in Compose
Frequently asked questions (Compose)
Getting started (Compose)
Install Compose
Link environment variables (deprecated) (Compose)
Networking in Compose
Overview of Docker Compose
Overview of docker-compose CLI
Quickstart: Compose and WordPress
Rails and PostgreSQL (Compose)
Sample apps with Compose
Using Compose in production
Using Compose with Swarm
Engine
.NET Core application (Engine)
About images, containers, and storage drivers (Engine)
Add nodes to the swarm (Engine)
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apt-cacher-ng
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Engine
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Migrate to Engine 1.10
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Run Docker Engine in swarm mode
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Engine: Security
AppArmor security profiles for Docker (Engine)
Automation with content trust (Engine)
Content trust in Docker (Engine)
Delegations for content trust (Engine)
Deploying Notary (Engine)
Docker security (Engine)
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Isolate containers with a user namespace (Engine)
Manage keys for content trust (Engine)
Play in a content trust sandbox (Engine)
Protect the Docker daemon socket (Engine)
Seccomp security profiles for Docker (Engine)
Secure Engine
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Using certificates for repository client verification (Engine)
Engine: Tutorials
Engine tutorials
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Get Started
Part 1: Orientation
Part 2: Containers
Part 3: Services
Part 4: Swarms
Part 5: Stacks
Part 6: Deploy your app
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Driver options and operating system defaults (Machine)
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Provision AWS EC2 instances (Machine)
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Provision hosts in the cloud (Machine)
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VMware vSphere (Machine)
Notary
Client configuration (Notary)
Common Server and signer configurations (Notary)
Getting started with Notary
Notary changelog
Notary configuration files
Running a Notary service
Server configuration (Notary)
Signer configuration (Notary)
Understand the service architecture (Notary)
Use the Notary client
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您正在查看传统独立群组的文档。这些主题描述了独立的 Docker Swarm。在 Docker 1.12 及更高版本中，Swarm 模式与 Docker Engine 集成。大多数用户应该使用集成的 Swarm 模式 - 一个好的开始就是 Swarm 模式入门， Swarm 模式 CLI 命令以及 Docker 演练入门。独立 Docker Swarm 未集成到 Docker Engine API 和 CLI 命令中。
Docker Compose 和 Docker Swarm 旨在实现完全集成，这意味着您可以将一个Compose应用程序指向一个 Swarm 集群，并且只需像使用单个 Docker 主机一样工作即可。
实际的集成范围取决于您使用的 Compose 文件格式的版本：
如果您使用的是版本1
links，则您的应用程序可以正常工作，但Swarm会将所有容器安排在一台主机上，因为容器之间的链接不适用于使用旧网络系统的主机。
如果您使用的是第2版，则您的应用程序应该无任何更改：
- subject to the [limitations](index#limitations) described below,- as long as the Swarm cluster is configured to use the [overlay driver](../../engine/userguide/networking/index#an-overlay-network-with-docker-engine-swarm-mode), or a custom driver which supports multi-host networking.
阅读多主机网络入门以了解如何使用 Docker Machine 和覆盖驱动程序设置 Swarm 群集。运行后，将应用程序部署到该应用程序应该如此简单：
$ eval "$(docker-machine env --swarm <name of swarm master machine>)"$ docker-compose up
局限性
构建图像
Swarm 可以像 Docker 实例一样通过 Dockerfile 构建镜像，但生成的镜像只能存在于单个节点上，不会分配给其他节点。
如果您想使用 Compose 将服务扩展到多个节点，则必须自己构建它，将其推送到注册表（例如 Docker Hub）并从docker-compose.yml以下位置引用它：
$ docker build -t myusername/web .$ docker push myusername/web $ cat docker-compose.yml web: image: myusername/web $ docker-compose up -d $ docker-compose scale web=3
多重依赖
如果一个服务具有强制联合调度类型的多个依赖关系（参见下面的自动调度），那么 Swarm 可能会调度依赖关系到不同的节点上，从而无法安排依赖服务。例如，这里foo需要被共同调度与bar和baz：
version: "2"services: foo: image: foo volumes_from: ["bar"] network_mode: "service:baz" bar: image: bar baz: image: baz
问题是，群可能会先安排bar和baz不同的节点上（因为他们是不依赖于彼此），使它不可能挑选一个合适的节点foo。
要解决此问题，请使用手动调度来确保所有三个服务都在同一个节点上结束：
version: "2"services: foo: image: foo volumes_from: ["bar"] network_mode: "service:baz" environment: - "constraint:node==node-1" bar: image: bar environment: - "constraint:node==node-1" baz: image: baz environment: - "constraint:node==node-1"
主机端口和重新创建容器
如果服务从主机映射端口，例如80:8000，那么docker-compose up在第一次之后运行它时可能会出现类似下面的错误：
docker: Error response from daemon: unable to find a node that satisfies container==6ab2dfe36615ae786ef3fc35d641a260e3ea9663d6e69c5b70ce0ca6cb373c02.
这种错误的常见原因是容器在没有显式映射的情况下具有一个卷（在其图像或撰写文件中定义），因此为了保留其数据，Compose 已指示 Swarm 安排新容器与旧容器相同的节点。这导致了端口冲突。
解决这个问题有两个可行的解决办法：
指定一个已命名的卷，并使用一个卷驱动程序，该卷驱动程序能够将该卷挂载到容器中，而不管其预定在哪个节点上。如果服务仅使用命名卷，则Compose不会为Swarm提供任何特定的计划指示。版本：“2”服务：web：build：。端口： - “80：8000”卷： - web-logs：/ var / log / web卷：web-logs：driver：custom-volume-driver
在创建新容器之前删除旧容器。您将失去该卷中的任何数据。
$ docker-compose stop web
$ docker-compose rm -f web
$ docker-compose up web
调度容器
自动调度
某些配置选项将导致容器在同一个 Swarm 节点上自动进行调度，以确保它们正常工作。这些是：
network_mode: "service:..."和network_mode: "container:..."（以及net: "container:..."第一版文件格式）。
volumes_from
links
手动调度
Swarm 提供了丰富的时间安排和亲和力提示，使您能够控制容器的位置。它们通过容器环境变量指定，因此您可以使用Compose 的environment选项来设置它们。
# Schedule containers on a specific node environment: - "constraint:node==node-1"# Schedule containers on a node that has the 'storage' label set to 'ssd'environment: - "constraint:storage==ssd"# Schedule containers where the 'redis' image is already pulled environment: - "affinity:image==redis"
有关完整的可用过滤器和表达式，请参阅 Swarm 文档。