如何在数字海洋水滴上运行docker图像？

Question

我有一个基于Ubuntu的液滴在数字海洋上安装了Docker，并在那里我上传了我的docker image.tar文件从我的桌面。我将这个image.tar文件上传到/home/newuser/app目录中。接下来，我使用以下命令加载image.tar：

sudo docker load -i image.tar

图像已加载。我查过了。

当我运行以下代码行时，我看不到公网IP上的图像应用程序连接到我的droplet实例：

sudo docker run image

或

sudo docker run -p 80:80 image

你们是怎么做的？

这是dockerfile：

FROM r-base:3.5.0

# Install Ubuntu packages
RUN apt-get update && apt-get install -y \
    sudo \
    gdebi-core \
    pandoc \
    pandoc-citeproc \
    libcurl4-gnutls-dev \
    libcairo2-dev/unstable \
    libxt-dev \
    libssl-dev 


# Add shiny user
RUN groupadd  shiny \
&& useradd --gid shiny --shell /bin/bash --create-home shiny



# Download and install ShinyServer
RUN wget --no-verbose https://download3.rstudio.org/ubuntu-14.04/x86_64/shiny-server-1.5.7.907-amd64.deb && \
    gdebi shiny-server-1.5.7.907-amd64.deb


# Install R packages that are required
RUN R -e "install.packages(c('Benchmarking', 'plotly', 'DT'), repos='http://cran.rstudio.com/')"
RUN R -e "install.packages('shiny', repos='https://cloud.r-project.org/')"

# Copy configuration files into the Docker image
COPY shiny-server.conf  /etc/shiny-server/shiny-server.conf
COPY /app /srv/shiny-server/

# Make the ShinyApp available at port 80
EXPOSE 80

# Copy further configuration files into the Docker image
COPY shiny-server.sh /usr/bin/shiny-server.sh

CMD ["/usr/bin/shiny-server.sh"]

shiny-server.conf的代码：

# Define the user we should use when spawning R Shiny processes
run_as shiny;

# Define a top-level server which will listen on a port
server {
  # Instruct this server to listen on port 80. The app at dokku-alt need expose PORT 80, or 500 e etc. See the docs
  listen 80;

  # Define the location available at the base URL
  location / {

    # Run this location in 'site_dir' mode, which hosts the entire directory
    # tree at '/srv/shiny-server'
    site_dir /srv/shiny-server;

    # Define where we should put the log files for this location
    log_dir /var/log/shiny-server;

    # Should we list the contents of a (non-Shiny-App) directory when the user 
    # visits the corresponding URL?
    directory_index on;
  }
}

shiny-server.sh的代码：

# Make sure the directory for individual app logs exists
mkdir -p /var/log/shiny-server
chown shiny.shiny /var/log/shiny-server

exec shiny-server >> /var/log/shiny-server.log 2>&1

Answer 1

当您使用-p 80:80运行容器时，实际上不需要在docker文件中公开端口80，可能只是作为对其他人的提示：https://forums.docker.com/t/what-is-the-use-of-expose-in-docker-file/37726/2

您可能应该发布shiny-server.conf，但我打赌您要么没有指定端口(在这种情况下，shiny-server在端口3838上启动)，要么指定了一个不是80的端口。确保在配置文件中修改以下行：

listen 3838