[MESOS-7272] Unified containerizer does not support docker registry version < 2.3.

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.2.0
• Fix Version/s: 1.2.1, 1.3.0
• Component/s: containerization, docker
• Labels: easyfix
• Target Version/s: 1.2.1, 1.3.0
• Epic Link: Unified Container
• Sprint: Mesosphere Sprint 53, Mesosphere Sprint 54, Mesosphere Sprint 55
• Story Points: 2
• Assignee: Gilbert Song
• Reporter: depay
• Shepherd: Jie Yu
• Created: 21/Mar/17 05:34
• Updated: 27/Apr/17 01:38
• Resolved: 27/Apr/17 01:38

Description

in file `src/uri/fetchers/docker.cpp`

```
Option<string> contentType = response.headers.get("Content-Type");
if (contentType.isSome() &&
!strings::startsWith(
contentType.get(),
"application/vnd.docker.distribution.manifest.v1"))

{ return Failure( "Unsupported manifest MIME type: " + contentType.get()); }

```

Docker fetcher check the contentType strictly, while docker registry with version < 2.3 returns manifests with contentType `application/json`, that leading failure like `E0321 13:27:27.572402 40370 slave.cpp:4650] Container 'xxx' for executor 'xxx' of framework xxx failed to start: Unsupported manifest MIME type: application/json; charset=utf-8`.