Docker compose：运行命令变量替换不起作用答案

【问题标题】：Docker compose: run command variable substitution doesn't workDocker compose：运行命令变量替换不起作用
【发布时间】：2018-04-19 20:16:03
【问题描述】：

问题

替换不适用于构建阶段

文件

docker-compose.yml（仅 kibana 部分）：

kibana:
        build:
            context: services/kibana
            args:
                KIBANA_VERSION: "${KIBANA_VERSION}"
        entrypoint: >
            /scripts/wait-for-it.sh elasticsearch:9200
            -s --timeout=${ELASTICSEARCH_INIT_TIMEOUT}
            -- /usr/local/bin/kibana-docker
        environment:
            ELASTICSEARCH_URL: http://elasticsearch:9200
        volumes:
            - ./scripts/wait-for-it.sh:/scripts/wait-for-it.sh
        ports:
            - "${KIBANA_HTTP_PORT}:5601"
        links:
            - elasticsearch
        depends_on:
            - elasticsearch
        networks:
            - frontend
            - backend
        restart: always

服务/kibana 的 Dockerfile：

ARG KIBANA_VERSION=6.2.3
FROM docker.elastic.co/kibana/kibana:${KIBANA_VERSION}

USER root
RUN yum install -y which && yum clean all

USER kibana

COPY kibana.yml /usr/share/kibana/config/kibana.yml
RUN ./bin/kibana-plugin install https://github.com/sivasamyk/logtrail/releases/download/v0.1.27/logtrail-${KIBANA_VERSION}-0.1.27.zip
COPY logtrail.json /usr/share/kibana/plugins/logtrail/logtrail.json

EXPOSE 5601

Env 文件（仅 kibana 部分）：

KIBANA_VERSION=6.2.3
KIBANA_HTTP_PORT=5601
KIBANA_ELASTICSEARCH_HOST=elasticsearch
KIBANA_ELASTICSEARCH_PORT=9200

实际输出（问题在这里：替换不起作用）

#docker-compose up --force-recreate --build kibana

.........

Step 8/10 : RUN ./bin/kibana-plugin install https://github.com/sivasamyk/logtrail/releases/download/v0.1.27/logtrail-${KIBANA_VERSION}-0.1.27.zip
 ---> Running in d28b1dcb6348
Attempting to transfer from https://github.com/sivasamyk/logtrail/releases/download/v0.1.27/logtrail--0.1.27.zip
Attempting to transfer from https://artifacts.elastic.co/downloads/kibana-plugins/https://github.com/sivasamyk/logtrail/releases/download/v0.1.27/logtrail--0.1.27.zip/https://github.com/sivasamyk/logtrail/releases/download/v0.1.27/logtrail--0.1.27.zip-6.2.3.zip
Plugin installation was unsuccessful due to error "No valid url specified."
ERROR: Service 'kibana' failed to build: The command '/bin/sh -c ./bin/kibana-plugin install https://github.com/sivasamyk/logtrail/releases/download/v0.1.27/logtrail-${KIBANA_VERSION}-0.1.27.zip' returned a non-zero code: 70

预期输出（类似的东西）：

Step 8/10 : RUN ./bin/kibana-plugin install https://github.com/sivasamyk/logtrail/releases/download/v0.1.27/logtrail-${KIBANA_VERSION}-0.1.27.zip
 ---> Running in d28b1dcb6348
Attempting to transfer from https://github.com/sivasamyk/logtrail/releases/download/v0.1.27/logtrail-6.2.3-0.1.27.zip

【问题讨论】：

标签： docker docker-compose dockerfile

【解决方案1】：

当我发布这个问题时，我在 5 分钟后找到了答案……该死的

解决方案很愚蠢，但有效：我只需要为新用户重新定义 args。见：

ARG KIBANA_VERSION=6.2.3
FROM docker.elastic.co/kibana/kibana:${KIBANA_VERSION}

USER root
RUN yum install -y which && yum clean all

USER kibana

ARG KIBANA_VERSION=${KIBANA_VERSION}

COPY kibana.yml /usr/share/kibana/config/kibana.yml
RUN ./bin/kibana-plugin install https://github.com/sivasamyk/logtrail/releases/download/v0.1.27/logtrail-${KIBANA_VERSION}-0.1.27.zip
COPY logtrail.json /usr/share/kibana/plugins/logtrail/logtrail.json

EXPOSE 5601

解决方法如下：

USER kibana

ARG KIBANA_VERSION=${KIBANA_VERSION}

【讨论】：