The Docker Installer (com.castsoftware.imaging.docker) provides installation and upgrade support for CAST Imaging on Docker for Linux and Microsoft Windows. For further information, see CAST Imaging installation for Docker on Linux or Microsoft Windows. Usage is as follows:

CAST Imaging releaseRequired Docker Installer release
≥ 2.15.0-beta2Starting from 2.15.0-beta2 of CAST Imaging, the Docker Installer will be provided with every single release and should be used to install the specific release and upgrade to the specific release. 
≥ 2.14.x≥ 1.2.10-funcrel
≥ 2.13.x≥ 1.2.9-funcrel
≥ 2.12.x≥ 1.2.8-funcrel
≥ 2.11.x≥ 1.2.7-funcrel
≥ 2.10.x≥ 1.2.6-funcrel
2.7.1-funcrel - 2.9.x-funcrel1.2.4-funcrel - 1.2.5-funcrel
2.5.x-funcrel - 2.6.x-funcrel1.2.2-funcrel
2.1.x-funcrel - 2.4.0-funcrel1.1.0-funcrel, 1.2.0-funcrel or 1.2.1-funcrel
2.0.x-funcrel1.1.0-beta1 only

The Docker Installer extension replaces the deprecated Linux Docker Installer extension (com.castsoftware.imaging.linux) which provided support only for CAST Imaging on Docker for Linux.