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https://issues.apache.org/jira/browse/RATIS-1245?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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runzhiwang updated RATIS-1245:
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Description: In HA case, such as there are three server: server1, server2,
server3, server1 is the leader, if we want to rolling upgrade leader, we can
upgrade server2, and then assign server2 with the highest priority, and
server1 stop accepting client request, then server2 will try to grab the leader
once catch up the log, if we want to rollback, we can assign server1 with the
highest priority and server2 stop accepting client request. (was: In HA case,
such as there are three server: server1, server2, server3, server1 is the
leader, if we want to rolling upgrade leader, we can upgrade server2, and then
assign server2 with the highest priority, and server1 stop accepting client
request, then server2 will try to grab the leader once catch up the log.)
> Support change priority dynamically
> -----------------------------------
>
> Key: RATIS-1245
> URL: https://issues.apache.org/jira/browse/RATIS-1245
> Project: Ratis
> Issue Type: Sub-task
> Reporter: runzhiwang
> Assignee: runzhiwang
> Priority: Major
>
> In HA case, such as there are three server: server1, server2, server3,
> server1 is the leader, if we want to rolling upgrade leader, we can upgrade
> server2, and then assign server2 with the highest priority, and server1 stop
> accepting client request, then server2 will try to grab the leader once catch
> up the log, if we want to rollback, we can assign server1 with the highest
> priority and server2 stop accepting client request.
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