Marathon Files

Changes from 1.8.218 to 1.8.212

External Volume Validation changes

Relaxed name validation

As there are some external volume providers which require options in the volume name, the strict validation of the name on the external volume is now removed.

As the uniqueness check is based on the volume name, this may lead to some inconsistencies, for the sake of uniqueness, the following volumes are distinct:

:::json
"volumes": [
      {
        "external": {
          "name": "name=volumename,option1=value",
        },
      }
    ],

:::json
"volumes": [
      {
        "external": {
          "name": "option1=value,name=volumename",
        },
      }
    ],

Optional uniqueness check

Previously, Marathon would validate that an external volume with the same name is only used once across all apps. This was due to the initial implementation being focused on Rexray+EBS. However, multiple external volume providers now allow shared access to mounted volumes, so we introduced a way to disable the uniqueness check:

A new field, container.volumes[n].external.shared which defaults to false. If set to true, the same volume name can be used by multiple containers. The shared flag has to be set to true on all external volumes with the same name, otherwise a conflict is reported on the volume without the shared=true flag.

:::json
  "container": {
    "type": "MESOS",
    "volumes": [
      {
        "external": {
          "size": 5,
          "name": "volumename",
          "provider": "dvdi",
          "shared": "true",
          "options": {
            "dvdi/driver": "pxd",
            "dvdi/shared": "true"
          }
        },
        "mode": "RW",
        "containerPath": "/mnt/nginx"
      }
    ],
  }