etcd/CHANGELOG/CHANGELOG-3.6.md

Previous change logs can be found at CHANGELOG-3.5.

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v3.6.0 (TBD)

See code changes.

Breaking Changes

• etcd will no longer start on data dir created by newer versions (for example etcd v3.6 will not run on v3.7+ data dir). To downgrade data dir please check out etcdutl migrate command.
• etcd doesn't support serving client requests on the peer listen endpoints (--listen-peer-urls). See pull/13565.

Deprecations

• Deprecated V2 discovery.
• Removed etcdctl defrag --data-dir.
• Removed etcdctl snapshot status.
• Removed etcdctl snapshot restore.
• Removed etcdutl snapshot save.

etcdctl v3

• Add command to generate shell completion.
• When print endpoint status, show db size in use
• Always print the raft_term in decimal when displaying member list in json.
• Add one more field storageVersion into the response of command etcdctl endpoint status.

etcdutl v3

• Add command to generate shell completion.
• Add migrate command for downgrading/upgrading etcd data dir files.

Package server

• Package mvcc was moved to storage/mvcc
• Package mvcc/backend was moved to storage/backend
• Package mvcc/buckets was moved to storage/schema
• Package wal was moved to storage/wal
• Package datadir was moved to storage/datadir

etcd server

• Add etcd --log-format flag to support log format.
• Add etcd --experimental-max-learners flag to allow configuration of learner max membership.
• Add etcd --experimental-enable-lease-checkpoint-persist flag to handle upgrade from v3.5.2 clusters with this feature enabled.
• Add etcdctl make-mirror --rev flag to support incremental mirror.
• Add etcd --experimental-wait-cluster-ready-timeout flag to wait for cluster to be ready before serving client requests.
• Add v3 discovery to bootstrap a new etcd cluster.
• Fix non mutating requests pass through quotaKVServer when NOSPACE
• Fix exclude the same alarm type activated by multiple peers.
• Fix Provide a better liveness probe for when etcd runs as a Kubernetes pod
• Fix Lease checkpoints don't prevent to reset ttl on leader change.
• Fix assertion failed due to tx closed when recovering v3 backend from a snapshot db
• Fix A client can panic etcd by passing invalid utf-8 in the client-api-version header
• Fix etcd gateway doesn't format the endpoint of IPv6 address correctly
• Fix A client can cause a nil dereference in etcd by passing an invalid SortTarget
• Fix Grant lease with negative ID can possibly cause db out of sync
• Fix segmentation violation(SIGSEGV) error due to premature unlocking of watchableStore
• Fix inconsistent log format
• Fix Inconsistent revision and data occurs
• Fix Etcdserver is still in progress of processing LeaseGrantRequest when it receives a LeaseKeepAliveRequest on the same leaseID
• Fix consistent_index coming from snapshot is overwritten by the old local value

tools/benchmark

• Add etcd client autoSync flag

Metrics, Monitoring

See List of metrics for all metrics per release.

• Add etcd_disk_defrag_inflight.

Go

• Compile with Go 1.17+

Other

• Use Distroless as base image to make the image less vulnerable and reduce image size.

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