Feature: add absolute timestamp RaftMetrics::last_quorum_acked
#94
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`RaftMetrics::last_quorum_acked` is the absolute timestamp of the most recent time point that is accepted by a quorum via `AppendEntries` RPC. This field is a wrapped `Instant` type: `SerdeInstant` which support serde for `Instant`. This field is added as a replacement of `millis_since_quorum_ack`, which is a relative time. `SerdeInstant` serialize `Instant` into a string formatted as "%Y-%m-%dT%H:%M:%S%.9f%z", e.g., "2024-07-24T04:07:32.567025000+0000". Note: Serialization and deserialization are not perfectly accurate and can be indeterministic, resulting in minor variations each time. These deviations(could be smaller or greater) are typically less than a microsecond (10^-6 seconds).
WalkthroughThe recent changes enhance the Raft protocol's metrics handling and error management, introducing better serialization for time-related metrics and refining error documentation. Key updates include the implementation of Changes
Sequence Diagram(s)sequenceDiagram
participant Leader
participant Quorum
participant Metrics
Leader->>Quorum: Sends heartbeat
Quorum-->>Leader: Acknowledgment received
Leader->>Metrics: Update last_quorum_acked timestamp
Metrics-->>Leader: Store updated timestamp
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Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Files selected for processing (9)
- openraft/src/core/raft_core.rs (3 hunks)
- openraft/src/error.rs (1 hunks)
- openraft/src/metrics/mod.rs (2 hunks)
- openraft/src/metrics/raft_metrics.rs (7 hunks)
- openraft/src/metrics/serde_instant.rs (1 hunks)
- openraft/src/metrics/wait_test.rs (2 hunks)
- scripts/check.kdl (1 hunks)
- tests/tests/fixtures/mod.rs (2 hunks)
- tests/tests/metrics/t10_leader_last_ack.rs (4 hunks)
Files skipped from review due to trivial changes (2)
- openraft/src/error.rs
- scripts/check.kdl
Additional context used
GitHub Check: lint
tests/tests/fixtures/mod.rs
[failure] 157-157:
single-character string constant used as pattern
[failure] 164-164:
single-character string constant used as pattern
[failure] 157-157:
single-character string constant used as pattern
[failure] 164-164:
single-character string constant used as pattern
[failure] 157-157:
single-character string constant used as pattern
[failure] 164-164:
single-character string constant used as pattern
Additional comments not posted (28)
openraft/src/metrics/mod.rs (2)
35-35: Addition ofserde_instantmodule looks good.The new module
serde_instantis correctly added to the list of modules.
46-46: Export ofSerdeInstantlooks good.The
SerdeInstanttype is correctly exported for use in other modules.openraft/src/metrics/serde_instant.rs (8)
1-7: Imports look good.The necessary modules and traits are correctly imported.
8-23:SerdeInstantstruct definition looks good.The struct is correctly defined with necessary traits.
25-33:Derefimplementation looks good.The
Dereftrait is correctly implemented forSerdeInstant.
35-41:Fromimplementation looks good.The
Fromtrait is correctly implemented forSerdeInstant.
43-49:fmt::Displayimplementation looks good.The
fmt::Displaytrait is correctly implemented forSerdeInstant.
51-61:SerdeInstantmethods look good.The methods for creating a new instance and extracting the inner type are correctly implemented.
63-201:serde_implmodule looks good.The module correctly implements serialization and deserialization for
SerdeInstant.
162-201: Tests forSerdeInstantlook good.The tests are comprehensive and cover edge cases.
tests/tests/metrics/t10_leader_last_ack.rs (4)
Line range hint
17-104:
Updates toleader_last_ack_3_nodeslook good.The function correctly includes assertions for
millis_since_quorum_ack.
119-210: New functionleader_last_ack_3_nodes_abs_timelooks good.The function correctly tests the
last_quorum_ackedtimestamp in a three-node configuration.
Line range hint
216-254:
Updates toleader_last_ack_1_nodelook good.The function correctly includes assertions for
last_quorum_acked.
256-258:timeoutfunction looks good.The function correctly provides a timeout duration for the tests.
openraft/src/metrics/wait_test.rs (3)
252-252: LGTM! Suppressing deprecated warnings is acceptable here.The
#[allow(deprecated)]attribute is necessary to maintain functionality without addressing deprecation immediately.
265-265: LGTM! The addition of thelast_quorum_ackedfield enhances metrics tracking.The
last_quorum_ackedfield provides more precise information about the leader's synchronization status with the cluster.
Line range hint
252-265: LGTM! Initialization oflast_quorum_ackedtoNonemaintains consistency.The
init_wait_testfunction correctly initializes thelast_quorum_ackedfield toNone, ensuring consistency in the structure's state.openraft/src/metrics/raft_metrics.rs (6)
10-11: LGTM! ImportingSerdeInstantis necessary for serialization and deserialization.The
SerdeInstanttype is required for handling the newlast_quorum_ackedfield.
78-78: LGTM! Deprecatingmillis_since_quorum_ackis appropriate.The deprecation of
millis_since_quorum_ackin favor oflast_quorum_ackedprovides a more precise representation of acknowledgment timing.
93-93: LGTM! Addinglast_quorum_ackedenhances metrics tracking.The
last_quorum_ackedfield provides more precise information about the leader's synchronization status with the cluster.
132-141: LGTM! Updatingfmt::Displayimplementation to includelast_quorum_ackedis correct.The
fmt::Displayimplementation is correctly updated to format and display the newlast_quorum_ackedfield.
208-208: LGTM! Deprecatingmillis_since_quorum_ackis appropriate.The deprecation of
millis_since_quorum_ackin favor oflast_quorum_ackedprovides a more precise representation of acknowledgment timing.
223-223: LGTM! Addinglast_quorum_ackedenhances metrics tracking.The
last_quorum_ackedfield provides more precise information about the leader's synchronization status with the cluster.tests/tests/fixtures/mod.rs (2)
135-138: LGTM! Enhancingset_panic_hookto store and call the previous hook is correct.Storing the previous panic hook and calling it after logging ensures that the original behavior is preserved while adding logging functionality.
157-164: LGTM! Adjustinglog_panicto improve log readability and use structured logging is correct.Replacing newline characters with spaces in the panic message improves readability. Using
tracing::error!for structured logging enhances error reporting.Tools
GitHub Check: lint
[failure] 157-157:
single-character string constant used as pattern
[failure] 164-164:
single-character string constant used as pattern
[failure] 157-157:
single-character string constant used as pattern
[failure] 164-164:
single-character string constant used as pattern
[failure] 157-157:
single-character string constant used as pattern
[failure] 164-164:
single-character string constant used as patternopenraft/src/core/raft_core.rs (3)
63-63: Import ofSerdeInstantis correct.The import statement is necessary for the changes made to the
RaftMetricsandRaftDataMetricsstructures.
574-574: Change tolast_quorum_ackedfield inRaftMetricsis correct.The change to use
SerdeInstantfor thelast_quorum_ackedfield enhances timestamp serialization capabilities.However, ensure that all references to
last_quorum_ackedin the codebase are updated to handleSerdeInstant.Verification successful
Change to
last_quorum_ackedfield inRaftMetricsis correct.The change to use
SerdeInstantfor thelast_quorum_ackedfield enhances timestamp serialization capabilities. The references tolast_quorum_ackedin the core implementation files (raft_core.rs,leader.rs,raft_metrics.rs) have been updated to handle the newSerdeInstanttype correctly.
openraft/src/core/raft_core.rs: References tolast_quorum_ackedhave been updated to useSerdeInstant.openraft/src/proposer/leader.rs: Functions related tolast_quorum_acked_timehandleSerdeInstant.openraft/src/metrics/raft_metrics.rs: Thelast_quorum_ackedfield is correctly defined asSerdeInstant.Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify all references to `last_quorum_acked` in the codebase are updated to handle `SerdeInstant`. # Test: Search for the `last_quorum_acked` references. Expect: Only occurances of the new type. rg --type rust -A 5 $'last_quorum_acked'Length of output: 14969
589-589: Change tolast_quorum_ackedfield inRaftDataMetricsis correct.The change to use
SerdeInstantfor thelast_quorum_ackedfield enhances timestamp serialization capabilities.However, ensure that all references to
last_quorum_ackedin the codebase are updated to handleSerdeInstant.Verification successful
All references to
last_quorum_ackedin the codebase are correctly updated to handleSerdeInstant.
- The references in the following files are correctly updated:
tests/tests/metrics/t10_leader_last_ack.rsopenraft/src/core/raft_core.rsopenraft/src/proposer/leader.rsopenraft/src/metrics/wait_test.rsopenraft/src/metrics/raft_metrics.rsScripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Verify all references to `last_quorum_acked` in the codebase are updated to handle `SerdeInstant`. # Test: Search for the `last_quorum_acked` references. Expect: Only occurances of the new type. rg --type rust -A 5 $'last_quorum_acked'Length of output: 14969
Script:
#!/bin/bash # Description: Verify that all references to `last_quorum_acked` in the codebase are updated to handle `SerdeInstant`. # Check if `SerdeInstant` is used correctly in the context of `last_quorum_acked` references. rg --type rust -A 5 'last_quorum_acked' | rg 'SerdeInstant'Length of output: 465
Script:
#!/bin/bash # Description: Verify that the references to `last_quorum_acked` in `tests/tests/metrics/t10_leader_last_ack.rs` are updated to handle `SerdeInstant`. # Check the usages of `last_quorum_acked` in the test file. rg --type rust 'last_quorum_acked' tests/tests/metrics/t10_leader_last_ack.rsLength of output: 1160
Script:
#!/bin/bash # Description: Verify that the references to `last_quorum_acked` in `tests/tests/metrics/t10_leader_last_ack.rs` are updated to handle `SerdeInstant`. # Display the context around each reference to `last_quorum_acked` in the test file. rg --type rust -A 5 -B 5 'last_quorum_acked' tests/tests/metrics/t10_leader_last_ack.rsLength of output: 2998
RaftMetrics::last_quorum_ackedis the absolute timestamp of the most recent time point that is accepted by a quorum viaAppendEntriesRPC. This field is a wrappedInstanttype:SerdeInstantwhich support serde forInstant. This field is added as a replacement ofmillis_since_quorum_ack, which is a relative time.SerdeInstantserializeInstantinto a string formatted as "%Y-%m-%dT%H:%M:%S%.9f%z", e.g., "2024-07-24T04:07:32.567025000+0000".Note: Serialization and deserialization are not perfectly accurate and can be indeterministic, resulting in minor variations each time. These deviations(could be smaller or greater) are typically less than a microsecond (10^-6 seconds).
Checklist
Summary by CodeRabbit
New Features
last_quorum_acked, to track leader acknowledgment timing inRaftMetricsandRaftDataMetrics.Bug Fixes
Tests
Chores