[MESOS-5261] Combine the internal::slave::Fetcher class and mesos-fetcher binary

• Type: Task
• Status: Accepted
• Priority: Major
• Resolution: Unresolved
• Component/s: fetcher
• Labels: fetcher mesosphere
• Epic Link: URI Fetcher
• Story Points: 3
• Assignee: Unassigned
• Reporter: Joseph Wu
• Shepherd: Jie Yu
• Created: 23/Apr/16 00:16
• Updated: 03/Aug/17 23:11

Description

After MESOS-5259, the mesos-fetcher will no longer need to be a separate binary and can be safely folded back into the agent process. (It was a separate binary because libcurl has synchronous/blocking calls.)

This will likely mean:

• A change to the fetch continuation chain:
  https://github.com/apache/mesos/blob/653eca74f1080f5f55cd5092423506163e65d402/src/slave/containerizer/fetcher.cpp#L315
• This protobuf can be deprecated (or just removed):
  https://github.com/apache/mesos/blob/653eca74f1080f5f55cd5092423506163e65d402/include/mesos/fetcher/fetcher.proto

Issue Links

• blocks: MESOS-3926 Modularize URI fetcher plugin interface.
• is blocked by: MESOS-5259 Refactor the mesos-fetcher binary to use the uri::Fetcher as a backend