*: enable lease checkpoint via experimental flag #10797
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Primary lessor persist lease remainingTTL only if experimental flag "--experimental-enable-lease-checkpoint" is set.
jingyih
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+1 to making the etcd 3.4 safer from a RAFT compatibility perspective. LGTM |
gyuho
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Jun 5, 2019
Thanks. Added 5af3723. |
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lgtm |
@jingyih My etcd server is running with env flags, so flag "--experimental-enable-lease-checkpoint" is equal to env flag "ETCD_EXPERIMENTAL_ENABLE_LEASE_CHECKPOINT=true"? Looking forward to your reply. |
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Discussed with @jpbetz. In etcd 3.4, let's put lease checkpoint feature #9924 behind an experimental flag. The primary concern is that the feature introduced a new raft entry type
LeaseCheckpointRequest. This will make the design of HA cluster downgrade difficult, as servers of old version panics on unknown raft type (during apply).With this PR, lease checkpoint feature is enabled only if "--experimental-enable-lease-checkpoint" is set.
cc @jpbetz @xiang90 @gyuho