Install Docker if you have problems with the Cosmology VMs

[Dirk Broer]

This -in a part of the Stderr output message- is what makes me think Docker is needed

2021-11-28 17:57:47 (1610381): Guest Log: 00:00:00.000133 main OS Product: Linux
2021-11-28 17:57:47 (1610381): Guest Log: 00:00:00.000151 main OS Release: 4.1.19-boot2docker
2021-11-28 17:57:47 (1610381): Guest Log: 00:00:00.000163 main OS Version: #1 SMP Sun Apr 17 19:40:54 UTC 2016
2021-11-28 17:57:47 (1610381): Guest Log: 00:00:00.000176 main Executable: /sbin/VBoxService
2021-11-28 17:57:47 (1610381): Guest Log: 00:00:00.000176 main Process ID: 839
2021-11-28 17:57:47 (1610381): Guest Log: 00:00:00.000177 main Package type: LINUX_64BITS_GENERIC
2021-11-28 17:57:52 (1610381): Guest Log: Linking /etc/docker to /var/lib/boot2docker for persistence
2021-11-28 17:57:52 (1610381): Guest Log: Waiting for Docker daemon to start...
2021-11-28 17:57:54 (1610381): Guest Log: REPOSITORY TAG IMAGE ID CREATED SIZE
2021-11-28 17:57:54 (1610381): Guest Log: Running boinc_app...
2021-11-28 17:57:54 (1610381): Guest Log: Importing Docker image from BOINC...
2021-11-28 17:57:57 (1610381): Guest Log: Prerun diagnostics...
2021-11-28 17:57:57 (1610381): Guest Log: REPOSITORY TAG IMAGE ID CREATED SIZE
2021-11-28 17:57:57 (1610381): Guest Log: marius311/camb_boinc2docker 1.0.0-slim f383d587a9c8 5 years ago 128.1 MB
2021-11-28 17:57:57 (1610381): Guest Log: CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2021-11-28 17:57:57 (1610381): Guest Log: 136.9M /var/lib/docker

The computer in question ran 317 VM tasks during the sprint, of which only two errored out.