目录搜索
ComposeAbout 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 bundledocker-compose configdocker-compose createdocker-compose downdocker-compose eventsdocker-compose execdocker-compose helpdocker-compose imagesdocker-compose killdocker-compose logsdocker-compose pausedocker-compose portdocker-compose psdocker-compose pulldocker-compose pushdocker-compose restartdocker-compose rmdocker-compose rundocker-compose scaledocker-compose startdocker-compose stopdocker-compose topdocker-compose unpausedocker-compose upEnvironment file (Compose)Environment variables in ComposeExtend services in ComposeFrequently asked questions (Compose)Getting started (Compose)Install ComposeLink environment variables (deprecated) (Compose)Networking in ComposeOverview of Docker ComposeOverview of docker-compose CLIQuickstart: Compose and WordPressRails and PostgreSQL (Compose)Sample apps with ComposeUsing Compose in productionUsing Compose with SwarmEngine.NET Core application (Engine)About images, containers, and storage drivers (Engine)Add nodes to the swarm (Engine)Apply custom metadata (Engine)Apply rolling updates (Engine)apt-cacher-ngBest practices for writing Dockerfiles (Engine)Binaries (Engine)Bind container ports to the host (Engine)Breaking changes (Engine)Build your own bridge (Engine)Configure container DNS (Engine)Configure container DNS in user-defined networks (Engine)CouchDB (Engine)Create a base image (Engine)Create a swarm (Engine)Customize the docker0 bridge (Engine)Debian (Engine)Default bridge networkDelete the service (Engine)Deploy a service (Engine)Deploy services to a swarm (Engine)Deprecated Engine featuresDocker container networking (Engine)Docker overview (Engine)Docker run reference (Engine)Dockerfile reference (Engine)Dockerize an applicationDrain a node (Engine)EngineFAQ (Engine)Fedora (Engine)Get started (Engine)Get started with macvlan network driver (Engine)Get started with multi-host networking (Engine)How nodes work (Engine)How services work (Engine)Image management (Engine)Inspect the service (Engine)Install Docker (Engine)IPv6 with Docker (Engine)Join nodes to a swarm (Engine)Legacy container links (Engine)Lock your swarm (Engine)Manage nodes in a swarm (Engine)Manage sensitive data with Docker secrets (Engine)Manage swarm security with PKI (Engine)Manage swarm service networks (Engine)Migrate to Engine 1.10Optional Linux post-installation steps (Engine)Overview (Engine)PostgreSQL (Engine)Raft consensus in swarm mode (Engine)Riak (Engine)Run Docker Engine in swarm modeScale the service (Engine)SDKs (Engine)Select a storage driver (Engine)Set up for the tutorial (Engine)SSHd (Engine)Storage driver overview (Engine)Store service configuration data (Engine)Swarm administration guide (Engine)Swarm mode key concepts (Engine)Swarm mode overlay network security model (Engine)Swarm mode overview (Engine)Understand container communication (Engine)Use multi-stage builds (Engine)Use swarm mode routing mesh (Engine)Use the AUFS storage driver (Engine)Use the Btrfs storage driver (Engine)Use the Device mapper storage driver (Engine)Use the OverlayFS storage driver (Engine)Use the VFS storage driver (Engine)Use the ZFS storage driver (Engine)Engine: Admin GuideAmazon CloudWatch logs logging driver (Engine)Bind mounts (Engine)Collect Docker metrics with Prometheus (Engine)Configuring and running Docker (Engine)Configuring logging drivers (Engine)Control and configure Docker with systemd (Engine)ETW logging driver (Engine)Fluentd logging driver (Engine)Format command and log output (Engine)Google Cloud logging driver (Engine)Graylog Extended Format (GELF) logging driver (Engine)Journald logging driver (Engine)JSON File logging driver (Engine)Keep containers alive during daemon downtime (Engine)Limit a container's resources (Engine)Link via an ambassador container (Engine)Log tags for logging driver (Engine)Logentries logging driver (Engine)PowerShell DSC usage (Engine)Prune unused Docker objects (Engine)Run multiple services in a container (Engine)Runtime metrics (Engine)Splunk logging driver (Engine)Start containers automatically (Engine)Storage overview (Engine)Syslog logging driver (Engine)tmpfs mountsTroubleshoot volume problems (Engine)Use a logging driver plugin (Engine)Using Ansible (Engine)Using Chef (Engine)Using Puppet (Engine)View a container's logs (Engine)Volumes (Engine)Engine: CLIDaemon CLI reference (dockerd) (Engine)dockerdocker attachdocker builddocker checkpointdocker checkpoint createdocker checkpoint lsdocker checkpoint rmdocker commitdocker configdocker config createdocker config inspectdocker config lsdocker config rmdocker containerdocker container attachdocker container commitdocker container cpdocker container createdocker container diffdocker container execdocker container exportdocker container inspectdocker container killdocker container logsdocker container lsdocker container pausedocker container portdocker container prunedocker container renamedocker container restartdocker container rmdocker container rundocker container startdocker container statsdocker container stopdocker container topdocker container unpausedocker container updatedocker container waitdocker cpdocker createdocker deploydocker diffdocker eventsdocker execdocker exportdocker historydocker imagedocker image builddocker image historydocker image importdocker image inspectdocker image loaddocker image lsdocker image prunedocker image pulldocker image pushdocker image rmdocker image savedocker image tagdocker imagesdocker importdocker infodocker inspectdocker killdocker loaddocker logindocker logoutdocker logsdocker networkdocker network connectdocker network createdocker network disconnectdocker network inspectdocker network lsdocker network prunedocker network rmdocker nodedocker node demotedocker node inspectdocker node lsdocker node promotedocker node psdocker node rmdocker node updatedocker pausedocker plugindocker plugin createdocker plugin disabledocker plugin enabledocker plugin inspectdocker plugin installdocker plugin lsdocker plugin pushdocker plugin rmdocker plugin setdocker plugin upgradedocker portdocker psdocker pulldocker pushdocker renamedocker restartdocker rmdocker rmidocker rundocker savedocker searchdocker secretdocker secret createdocker secret inspectdocker secret lsdocker secret rmdocker servicedocker service createdocker service inspectdocker service logsdocker service lsdocker service psdocker service rmdocker service scaledocker service updatedocker stackdocker stack deploydocker stack lsdocker stack psdocker stack rmdocker stack servicesdocker startdocker statsdocker stopdocker swarmdocker swarm cadocker swarm initdocker swarm joindocker swarm join-tokendocker swarm leavedocker swarm unlockdocker swarm unlock-keydocker swarm updatedocker systemdocker system dfdocker system eventsdocker system infodocker system prunedocker tagdocker topdocker unpausedocker updatedocker versiondocker volumedocker volume createdocker volume inspectdocker volume lsdocker volume prunedocker volume rmdocker waitUse the Docker command line (Engine)Engine: ExtendAccess authorization plugin (Engine)Docker log driver pluginsDocker network driver plugins (Engine)Extending Engine with pluginsManaged plugin system (Engine)Plugin configuration (Engine)Plugins API (Engine)Volume plugins (Engine)Engine: SecurityAppArmor 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)Docker security non-events (Engine)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 EngineUse trusted imagesUsing certificates for repository client verification (Engine)Engine: TutorialsEngine tutorialsNetwork containers (Engine)Get StartedPart 1: OrientationPart 2: ContainersPart 3: ServicesPart 4: SwarmsPart 5: StacksPart 6: Deploy your appMachineAmazon Web Services (Machine)Digital Ocean (Machine)docker-machine activedocker-machine configdocker-machine createdocker-machine envdocker-machine helpdocker-machine inspectdocker-machine ipdocker-machine killdocker-machine lsdocker-machine provisiondocker-machine regenerate-certsdocker-machine restartdocker-machine rmdocker-machine scpdocker-machine sshdocker-machine startdocker-machine statusdocker-machine stopdocker-machine upgradedocker-machine urlDriver options and operating system defaults (Machine)Drivers overview (Machine)Exoscale (Machine)Generic (Machine)Get started with a local VM (Machine)Google Compute Engine (Machine)IBM Softlayer (Machine)Install MachineMachineMachine CLI overviewMachine command-line completionMachine concepts and helpMachine overviewMicrosoft Azure (Machine)Microsoft Hyper-V (Machine)Migrate from Boot2Docker to MachineOpenStack (Machine)Oracle VirtualBox (Machine)Provision AWS EC2 instances (Machine)Provision Digital Ocean Droplets (Machine)Provision hosts in the cloud (Machine)Rackspace (Machine)VMware Fusion (Machine)VMware vCloud Air (Machine)VMware vSphere (Machine)NotaryClient configuration (Notary)Common Server and signer configurations (Notary)Getting started with NotaryNotary changelogNotary configuration filesRunning a Notary serviceServer configuration (Notary)Signer configuration (Notary)Understand the service architecture (Notary)Use the Notary client
文字

撰写中有多个部分在某种意义上处理环境变量。这个页面应该可以帮助你找到你需要的信息。

在组合文件中替换环境变量

可以在 shell 中使用环境变量填充复合文件中的值:

web:
  image: "webapp:${TAG}"

有关更多信息,请参见变量替换节中的“撰写文件引用”。

在容器中设置环境变量

可以在服务的容器中设置环境变量。“环境”键,就像docker run -e VARIABLE=VALUE ...*

web:
  environment:    - DEBUG=1

将环境变量传递到容器

可以将环境变量直接从shell传递到服务的容器,“环境”键不给他们一个价值,就像docker run -e VARIABLE ...*

web:
  environment:    - DEBUG

DEBUG容器中的变量的值将从运行复合的 shell 中相同变量的值中提取。

env_file“ 配置选项

可以将多个环境变量从外部文件传递到服务的容器,env_file

选项,就像docker run --env-file=FILE ...*

web:
  env_file:    - web-variables.env

以 “docker-compose run”设置环境变量

就像docker run -e,则可以在一次性容器上设置环境变量docker-compose run -e*。

docker-compose run -e DEBUG=1 web python console.py

还可以通过不给变量值从 shell 传递变量:

docker-compose run -e DEBUG web python console.py

DEBUG容器中的变量的值将从运行复合的 shell 中的相同变量的值中提取。

“.env”文件

控件中引用的任何环境变量或用于配置撰写的任何环境变量的默认值。环境文件命名.env*

$ cat .env
TAG=v1.5$ cat docker-compose.yml
version: '3'services:
  web:
    image: "webapp:${TAG}"

当你运行的时候docker-compose upweb上面定义的服务使用图像webapp:v1.5.您可以使用配置命令,它将已解析的应用程序配置打印到终端:

$ docker-compose config
version: '3'services:
  web:
    image: 'webapp:v1.5'

shell 中的值优先于.env文件中指定的值。如果你TAG在你的 shell 中设置了一个不同的值,那么这个替换就会image使用它:

$ export TAG=v2.0$ docker-compose config
version: '3'services:
  web:
    image: 'webapp:v2.0'

当使用 shell 中 environment变量和env_file配置文件提供值时,环境变量的值将首先从环境密钥获取,然后从环境文件获取,然后从 ** -entry ** 获取:Dockerfile ENV

$ cat ./Docker/api/api.env
NODE_ENV=test

$ cat docker-compose.yml
version: '3'services:
  api:
    image: 'node:6-alpine'
    env_file:     - ./Docker/api/api.env
    environment:     - NODE_ENV=production

你可以用它来测试例如 NodeJSCLI 中的容器:

$ docker-compose exec api node> process.env.NODE_ENV'production'

有任何ARGENV设置在Dockerfile只有在否码头工人作曲进入environmentenv_file

NodeJS 容器专用材料:如果你有package.json进入script:start就像NODE_ENV=test node server.js,这将推翻你的docker-compose.yml档案中任何文件。

使用环境变量配置组合

有几个环境变量可供您配置 Docker Compose 命令行行为。它们以 CLI 环境变量开头COMPOSE_DOCKER_记录在 CLI 环境变量中。

由链接创建的环境变量

在 v1 撰写文件中使用 'links' 选项时,将为每个链接创建环境变量。它们记录在 Link 环境变量参考中。但请注意,这些变量已被弃用 - 您应该将链接别名用作主机名。

上一篇:下一篇: