[RATIS-1474] Support no-leader mode in ratis

• Type: New Feature
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.3.0
• Component/s: server
• Assignee: Yaolong Liu
• Reporter: Yaolong Liu
• Created: 21/Dec/21 02:46
• Updated: 10/May/22 05:05
• Resolved: 10/May/22 05:05

Description

Hi, szetszwo, we have a requirement here. We want to make a ratis cluster temporarily without a leader and call it safe mode. We want all three ratis servers to be in the follower state. I haven't thought of a good way to achieve it, Do you have any solutions?

Sub-Tasks

• Implement pause election to support no leader mode: Resolved
• Add pause leader election request related code: Resolved
• Add setLeaderElection grpc and client related code: Resolved
• Implement step down leader in server: Resolved
• Add step down leader proto and client related code: Resolved
• Add ratis-shell pause&resume leader election command: Resolved
• Add ratis-shell step down leader command: Resolved