render

README

docker render

Install the Docker plugin

Use the following command to install the Docker plugin in your current Docker CLI installation

make install-plugins

Test the installation using docker render from your Terminal.

Usage

Once you've installed the Docker plugin you can use as following

docker render [OPTIONS] <context_path>

With the following options:

Name	Description	Required	Default value
file-name	The name of the template file	False	Dockerfile.template
output	The name of the outputfile, if it's an empty string the result will be printed on stdout	False
values	The path for the values file. If an absolute path is passed context path will be ignored. Otherwise it will be joined to the conext path	False	docker-values.yaml

Example

Once you've installed the Docker plugin you can follow the below steps:

• Create a Dockerfile.template with the following content

  # Use an official base image
  FROM {{.BaseImage}}
  
  # Set the exposed port
  EXPOSE {{.Deployment.ExposedPort}}
  
  # Set environment variables
  {{range .Deployment.Environment}}
  ENV {{.Name}}="{{.Value}}"
  {{end}}
  
  # Copy source code
  COPY . {{.CopyDestination}}
  
  # Run command
  CMD {{.RunCommand}}
  

• Create a docker-values.yaml file with the following content:

  BaseImage: "ubuntu:latest"
  Deployment:
  ExposedPort: "9091"
  Environment:
      - Name: "DEBUG"
      Value: "false"
      - Name: "LOG_LEVEL"
      Value: "info"
  CopyDestination: "/app"
  RunCommand: "echo Hello World"
  

• Create the Dockerfile with

  docker render -output Dockerfile .
  

• Build the Docker image

  docker build . -t rendered-docker-image
  

• Run the container

  docker run -it rendered-docker-image
  

  This shoould output Hello World on your terminal.