{
  "$schema": "http://json-schema.org/draft-04/schema",
  "type": "object",
  "description": "Manifest describing group of [Docker containers](http://docker.io); also used by [Google Cloud Platform's container-vm images](https://developers.google.com/compute/docs/containers).",
  "properties": {
    "version": {
      "type": "string",
      "description": "The version of the manifest.",
      "enum": [
        "v1beta1"
      ]
    },
    "containers": {
      "type": "array",
      "description": "The list of containers to launch.",
      "items": {
        "type": "object",
        "required": [
          "image"
        ],
        "properties": {
          "name": {
            "type": "string",
            "description" : "A symbolic name used to create and track the container. Must be an RFC1035 compatible value (a single segment of a DNS name). All containers must have unique names."
          }, 
          "image": {
            "type": "string",
            "description" : "The container image to run."
          }, 
          "command": {
            "type": "array",
            "description" : "The command line to run. If this is omitted, the container is assumed to have a command embedded in it.",
            "items": {
              "type": "string"
            }
          },
          "workingDir": {
            "type": "string",
            "description" : "The initial working directory for the command. Default is the container’s embedded working directory or else the Docker default."
          }, 
          "volumeMounts": {
            "type": "array",
            "description" : "Data volumes to expose into the container.",
            "items": {
              "type": "object",
              "properties": {
                "name": {
                  "type": "string",
                  "description" : "The name of the volume to mount. This must match the name of a volume defined in volumes[]."
                }, 
                "mountPath": {
                  "type": "string",
                  "description" : "The path at which to mount the volume inside the container. This must be an absolute path and no longer than 512 characters."
                }, 
                "readOnly": {
                  "type": "boolean",
                  "description" : "Whether this volume should be read-only. Default is false (read-write)."
                }
              }
            }
          },
          "ports": {
            "type": "array",
            "description" : "Ports to expose from the container. All of these are exposed out through the public interface of the VM.",
            "items": {
              "type": "object",
              "properties": {
                "name": {
                  "type": "string",
                  "description" : "A symbolic name used to create and track the port. Must be an RFC1035 compatible value (a single segment of a DNS name)."
                },
                "containerPort": {
                  "type": "integer",
                  "description" : "The port on which the container is listening."
                }, 
                "hostPort": {
                  "type": "integer",
                  "description" : "The port on the host which maps to the containerPort. Default is auto-allocated."
                }, 
                "protocol": {
                  "type": "string",
                  "description" : "The protocol for this port. Valid options are TCP and UDP. Default is TCP."
                }
              }
            }
          },
          "env": {
            "type": "array",
            "description" : "Environment variables to set before the container runs.",
            "items": {
              "type": "object",
              "properties": {
                "name": {
                  "type": "string",
                  "description" : "The name of the environment variable."
                }, 
                "value": {
                  "type": "string",
                  "description" : "The value of the environment variable."
                }
              }
            }
          }
        }
      }
    }, 
    "volumes": {
      "type": "array", 
      "description" : "A list of volumes to share between containers.",
      "uniqueItems": true,
      "items": {
        "type": "object",
        "required": [
          "name"
        ],
        "properties": {
          "name": {
            "type": "string",
            "description" : "The name of the volume. Must be an RFC1035 compatible value (a single segment of a DNS name). All volumes must have unique names. These are referenced by `containers[].volumeMounts[].name`.",
            "pattern": "^[a-z]([-a-z0-9]*[a-z0-9])*"
          }
        }
      }
    }
  }
}