我尝试在Dockerfile中设置一个mongodb 这是来自我的dockerfile，它基于Debian：
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</style>当我尝试构建此Dockerfile时，出现以下错误：
...mongoDB is installed here
#start the mongoDB
RUN mongod --fork --logpath /var/log/mongod.log
RUN mongo --eval "db.getSiblingDB('db')"
如果有人知道如何解决这个问题，那就太棒了。
答案 0 :(得分：0)
问题与Docker如何处理Dockerfile有关。 Dockerfile中的每个语句都在一个容器中执行，该容器是根据前一行的图像创建的。在RUN语句的情况下，Docker在容器中运行代码并根据容器的当前状态创建新映像。该图像不包含有关正在运行的进程的任何信息。
在您的情况下，这意味着您有一个包含mongodb安装的图像。我们称之为A（而不是docker build日志中的哈希值）。第一个RUN语句
RUN mongod --fork --logpath /var/log/mongod.log
在容器中处理，我们称之为a，它基于图像A。 mongod中的进程a可能会在日志文件中附加几行。处理完RUN语句后，容器的文件系统将被冻结并标记为图像B。 Docker镜像不包含有关正在运行的进程的任何信息。实际上，此时，不再有mongod进程在运行。但是，图像B包含此前RUN的日志条目。
第二个RUN声明
RUN mongo --eval "use db"
在容器b中执行，该容器基于图像B。此命令失败，因为没有mongo可以与之通信的正在运行的进程。
我认为您的问题有两种解决方案：
通常，您可以一步运行两个脚本
RUN mongod --fork --logpath /var/log/mongod.log && mongo --eval "use db"
或将它们移动到bash脚本，以便它们在同一个容器中执行。
使用官方mongo image on Docker hub。