Cybus::File

Docker containers and volumes can contain any sort of files. With the Cybus::File resources, additional files can be written into a given volume with the content specified in the commissioning file.

Note

This feature is available only in docker-compose deployments, but not in kubernetes deployments of the Connectware. Using this in a kubernetes deployment will be refused with a suitable error message.

The life-time of such a file is similar to that of a volume: Upon enabling the service, the file will be newly created by the Connectware and the specified content will be written into the file, potentially overwriting any other content that might have been existing at this file path beforehand. Subsequently, the file will neither be deleted nor truncated by the Connectware, neither on disabling the service nor on any other occasion. The file will be deleted together with the volume, once the volume gets deleted manually.

Properties

Property	Type	Required	Default
volume	string	Required
filepath	string	Required
content	string	Required
writeMode	enum	Optional	create

volume

The reference to the docker volume to which this file should be written.

• type: string

filepath

The absolute path and filename of the file to be written inside the volume.

• type: string

content

The content of the file as a base64 encoded string.

• type: string

writeMode

Choosing the writing mode when writing the file. Create - Create the file with given content if not existing, but if existing, check whether it has the given content, and if it has a different content, throw an error (i.e. don’t overwrite any different content). Overwrite - Create the file with the given content, either creating it newly or overwriting a previously existing file. Append - Append the given content to the file. If it already exists, the given content is appended. If it does not exist, the file is newly created with the given content.

• type: enum which must be one of these values: create, overwrite, ``append.

• default: create

Example

myVolume:
  type: Cybus::Volume

myFile:
  type: Cybus::File
  properties:
    volume: !ref myVolume
    filepath: '/data/myFile.txt'
    content: 'Zm9vYmFyCg=='
    writeMode: create