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don Rumata
Asked:2024-01-08 19:41:12 +0000 UTC2024-01-08 19:41:12 +0000 UTC

FROM 的 ARG 在 Dockerfile 中不起作用

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docker info:

Client: Docker Engine - Community
 Version:    24.0.7
 Context:    default
 Debug Mode: false
 Plugins:
  buildx: Docker Buildx (Docker Inc.)
    Version:  v0.11.2
    Path:     /usr/libexec/docker/cli-plugins/docker-buildx
  compose: Docker Compose (Docker Inc.)
    Version:  v2.21.0
    Path:     /usr/libexec/docker/cli-plugins/docker-compose

Server:
 Containers: 15
  Running: 1
  Paused: 0
  Stopped: 14
 Images: 339
 Server Version: 24.0.7
 Storage Driver: overlay2
  Backing Filesystem: extfs
  Supports d_type: true
  Using metacopy: false
  Native Overlay Diff: true
  userxattr: false
 Logging Driver: json-file
 Cgroup Driver: cgroupfs
 Cgroup Version: 1
 Plugins:
  Volume: local
  Network: bridge host ipvlan macvlan null overlay
  Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
 Swarm: inactive
 Runtimes: io.containerd.runc.v2 runc
 Default Runtime: runc
 Init Binary: docker-init
 containerd version: 3dd1e886e55dd695541fdcd67420c2888645a495
 runc version: v1.1.10-0-g18a0cb0
 init version: de40ad0
 Security Options:
  apparmor
  seccomp
   Profile: builtin
 Kernel Version: 5.4.0-132-generic
 Operating System: Ubuntu 20.04.5 LTS
 OSType: linux
 Architecture: x86_64
 CPUs: 4
 Total Memory: 3.839GiB
 Name: ubuntu-2004-clean-01
 ID: e397e021-a07f-4d31-8542-a4a52e25c357
 Docker Root Dir: /var/lib/docker
 Debug Mode: false
 Experimental: false
 Insecure Registries:
  172.16.11.200:5000
  cache.localdomain:5000
  repo.localdomain:5000
  127.0.0.0/8
 Live Restore Enabled: false

部分Dockerfile：

ARG DOCKER_REGISTRY_ADDRESS="cache.localdomain:5000"
ARG DISTRO=alpine
ARG DISTRO_VERSION=3.18
ARG DOCKER_NODEJS_IMAGE_NAME=${DOCKER_REGISTRY_ADDRESS}/node-${DISTRO}${DISTRO_VERSION}

FROM ${DOCKER_NODEJS_IMAGE_NAME} AS nodejs

我执行docker build . --tag image-custom并得到：

ERROR: failed to solve: base name (${DOCKER_NODEJS_IMAGE_NAME}) should not be blank

在不同的网络上，我计划使用 docker 镜像的不同注册表地址和 docker 镜像本身的不同名称。这就是我写作的原因ARG，以便我能做到docker build --build-arg。

docker

1 个回答

  1. Best Answer

    发现问题了。

    我的高度太高了LABEL maintainer=${MAINTAINER}，它已经需要某种图像，所以作为临时解决方案，我添加了FROM alpine. 那些。它看起来更完整，如下所示：

    ARG DOCKER_REGISTRY_ADDRESS="cache.localdomain:5000"
ARG DISTRO=alpine
ARG DISTRO_VERSION=3.18
FROM ${DISTRO}

ARG DOCKER_NODEJS_IMAGE_NAME=${DOCKER_REGISTRY_ADDRESS}/node-${DISTRO}${DISTRO_VERSION}

ARG MAINTAINER="don Rumata"
LABEL maintainer=${MAINTAINER}

FROM ${DOCKER_NODEJS_IMAGE_NAME} AS nodejs

    显然，我搞乱了图层的创建顺序，这就是一切崩溃的原因。这是正确的选项：

    ARG DOCKER_REGISTRY_ADDRESS="cache.localdomain:5000"
ARG DISTRO=alpine
ARG DISTRO_VERSION=3.18

ARG DOCKER_NODEJS_IMAGE_NAME=${DOCKER_REGISTRY_ADDRESS}/node-${DISTRO}${DISTRO_VERSION}

FROM ${DOCKER_NODEJS_IMAGE_NAME} AS nodejs

ARG MAINTAINER="don Rumata"
LABEL maintainer=${MAINTAINER}
    • 0

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