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test: add e2e test for region failover #4188

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merged 6 commits into from
Jun 28, 2024

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@WenyXu WenyXu commented Jun 21, 2024

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

#4161
wait for #4172

What's changed and what's your intention?

  • Modified CreateTableExprGenerator to use Ident instead of String for table names in create_expr.rs
  • Updated InsertExprGenerator to use Ident instead of String for table names in insert_expr.rs
  • Introduced new utility modules: cluster_info, partition, and wait in utils.rs
  • Added GT_FUZZ_CLUSTER_NAMESPACE and GT_FUZZ_CLUSTER_NAME constants in utils.rs
  • Created new fuzz target fuzz_failover_mito_regions.rs
  • Implemented Ident::is_empty method in ir.rs
  • Refactored timestamp generation for MySQL to use TsValueGenerator
  • Added count_values function in validator/row.rs
  • Updated Makefile to include fuzz-ls target for listing fuzz targets
sequenceDiagram
    participant Client
    participant Cluster
    participant Datanode
    participant K8s

    Client->>Cluster: Initialize connections
    Cluster->>Datanode: Fetch node info
    Datanode-->>Cluster: Return node info
    Cluster->>Client: Return connections
    Client->>K8s: Simulate pod failure
    Cluster-->>Datanode: Region failover
    Client->>K8s: Recover pod
    Client->>Cluster: Validate data consistency
    Cluster-->>Client: Data validation result
Loading

Checklist

  • I have written the necessary rustdoc comments.
  • I have added the necessary unit tests and integration tests.
  • This PR requires documentation updates.

Summary by CodeRabbit

  • New Features

    • Introduced functionality for fetching cluster node information, managing partitions, and simulating pod failures.
    • Added a fuzzing target for testing failover scenarios, which includes generating table schemas, inserting data, and validating data consistency post-recovery.
  • Refactor

    • Updated methods for MySQL connection options and logging configurations.
  • Enhancements

    • Added utility functions for waiting for conditions, managing regions, and dealing with pod failures in a Kubernetes cluster.

@github-actions github-actions bot added the docs-not-required This change does not impact docs. label Jun 21, 2024
@WenyXu WenyXu marked this pull request as ready for review June 25, 2024 12:44
@WenyXu WenyXu requested a review from a team as a code owner June 25, 2024 12:44
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Commits

Files that changed from the base of the PR and between e167bbe and ed3c018.

Walkthrough

The recent updates enhance the tests-fuzz/src/utils.rs by adding new modules (cluster_info, partition, pod_failure, and wait) and refactoring existing functionalities to improve cluster management, logging, and failover fuzz testing. These updates primarily introduce new functions and structs to manage cluster nodes, handle partition data, simulate and recover from pod failures, and wait for specified conditions. They also refine MySQL connection handling for better logging control.

Changes

Files/Modules Change Summary
tests-fuzz/src/utils.rs Added new modules for cluster info, partitions, pod failures, and wait actions. Refactored MySQL connections.
.../utils/cluster_info.rs Introduced node info fetching, wait-for-datanode readiness functions, and NodeInfo struct.
.../utils/partition.rs Added structs and functions for partition management, including counting, fetching data, and handling region distribution.
.../utils/pod_failure.rs Provided functions to simulate and recover from pod failures in Kubernetes.
.../utils/wait.rs Added function for condition-based waiting within a specified timeout period.
.../targets/failover/fuzz_failover_mito_regions.rs Introduced a new fuzzing target that tests failover scenarios, including schema generation, data insertion, pod failure simulation, and data consistency validation.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant Cluster
    participant Datanode
    participant K8sPod
    participant Database

    Client->>Cluster: Initialize connections
    Cluster->>Datanode: Fetch node info
    Datanode-->>Cluster: Return node info
    Cluster->>Client: Return connections
    Client->>K8sPod: Simulate pod failure
    K8sPod-->Database: Data operations interrupted
    Client->>K8sPod: Recover pod
    K8sPod-->Database: Resume data operations
    Client->>Cluster: Validate data consistency
    Cluster-->>Client: Data validation result
Loading

Poem

In clusters wide and nodes so bright,
We fetch, we wait, from day to night.
With partitions spread and pods aflame,
We test and tweak, enhancing fame.
Connections strong, failover's dance,
Our code refined, it leads the chance.
🌟👩‍💻✨


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Actionable comments posted: 11

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between ac574b6 and 00e7d0e.

Files ignored due to path filters (1)
  • Cargo.lock is excluded by !**/*.lock
Files selected for processing (13)
  • Makefile (1 hunks)
  • tests-fuzz/Cargo.toml (3 hunks)
  • tests-fuzz/src/generator/create_expr.rs (3 hunks)
  • tests-fuzz/src/generator/insert_expr.rs (1 hunks)
  • tests-fuzz/src/ir.rs (4 hunks)
  • tests-fuzz/src/ir/insert_expr.rs (1 hunks)
  • tests-fuzz/src/utils.rs (2 hunks)
  • tests-fuzz/src/utils/cluster_info.rs (1 hunks)
  • tests-fuzz/src/utils/crd.rs (1 hunks)
  • tests-fuzz/src/utils/partition.rs (1 hunks)
  • tests-fuzz/src/utils/wait.rs (1 hunks)
  • tests-fuzz/src/validator/row.rs (1 hunks)
  • tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs (1 hunks)
Files skipped from review due to trivial changes (1)
  • tests-fuzz/src/utils/crd.rs
Additional comments not posted (12)
tests-fuzz/Cargo.toml (1)

30-31: Addition of futures and humantime dependencies, and a new binary store-api.

The addition of futures and humantime dependencies aligns with the need for asynchronous and time-related functionalities in fuzz tests. The declaration of store-api as a workspace member ensures that it is correctly integrated into the project's build process.

Ensure that these dependencies are used appropriately in the project to avoid unnecessary bloat.

Also applies to: 59-59

tests-fuzz/src/ir/insert_expr.rs (1)

22-22: Change of table_name field type from String to Ident.

This change enhances type safety and consistency across the codebase. Using Ident instead of String for SQL identifiers is a good practice as it can provide additional type checks and potentially reduce errors during compile time.

tests-fuzz/src/utils.rs (2)

95-97: Addition of new constants for cluster configuration

The constants GT_FUZZ_CLUSTER_NAMESPACE and GT_FUZZ_CLUSTER_NAME are added to configure cluster settings. This is a good practice as it avoids hardcoding values and makes the configuration more flexible. Ensure these constants are used consistently throughout the codebase.

Verification successful

Consistent usage of new constants GT_FUZZ_CLUSTER_NAMESPACE and GT_FUZZ_CLUSTER_NAME verified

The constants GT_FUZZ_CLUSTER_NAMESPACE and GT_FUZZ_CLUSTER_NAME are properly utilized in the codebase, specifically within the files tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs and tests-fuzz/src/utils.rs. This confirms that the new constants are being used consistently to configure cluster settings, enhancing the flexibility and maintainability of the configuration.

  • tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs
    • Usage in environment variable retrieval for namespace and cluster_name.
  • tests-fuzz/src/utils.rs
    • Declaration of the constants.
Scripts executed

The following scripts were executed for the analysis:


Script:

#!/bin/bash
# Description: Verify the usage of the new constants across the codebase.

# Test: Search for the usage of the new constants. Expect: Multiple files referencing these constants.
rg --type rust -e "GT_FUZZ_CLUSTER_NAMESPACE" -e "GT_FUZZ_CLUSTER_NAME" --files-with-matches

Length of output: 172



Script:

#!/bin/bash
# Extract and review the lines where the constants are used in the mentioned files.

# Extract lines from tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs
echo "Usage in tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs:"
rg --type rust -e "GT_FUZZ_CLUSTER_NAMESPACE" -e "GT_FUZZ_CLUSTER_NAME" tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs

# Extract lines from tests-fuzz/src/utils.rs
echo "Usage in tests-fuzz/src/utils.rs:"
rg --type rust -e "GT_FUZZ_CLUSTER_NAMESPACE" -e "GT_FUZZ_CLUSTER_NAME" tests-fuzz/src/utils.rs

Length of output: 828


97-97: Implementation of flush_memtable function

The flush_memtable function is crucial for ensuring data consistency during tests by flushing the memtable to an SST file. The implementation uses dynamic SQL construction, which can be prone to errors if not handled correctly. Ensure that the sql variable is properly sanitized and tested to prevent SQL injection vulnerabilities.

tests-fuzz/src/generator/insert_expr.rs (1)

106-106: Optimization in InsertIntoExpr generator

The change from .to_string() to .clone() for the table_name assignment is a good optimization. It avoids unnecessary string creation and leverages the Clone trait, which is more efficient for Ident types that might already be stored in memory.

Makefile (1)

173-176: Addition of fuzz-ls target in Makefile

The new fuzz-ls target is a useful addition for listing all available fuzz targets. This enhances the usability of the fuzz testing framework by providing a quick way to view all targets. Ensure that this target is documented in the Makefile to help new developers understand its purpose.

tests-fuzz/src/ir.rs (2)

42-42: Addition of new import in ir.rs

The import of TsValueGenerator is crucial for the modifications made in the generate_unique_timestamp_for_mysql function. This ensures that the function can utilize the timestamp generation capabilities defined elsewhere in the codebase.


Line range hint 130-142: Refactor of generate_unique_timestamp_for_mysql

The refactor of generate_unique_timestamp_for_mysql to return a TsValueGenerator instead of a closure is a significant improvement. This change enhances the modularity and reusability of the timestamp generation logic. Ensure that all usages of this function are updated to handle the new return type correctly.

Verification successful

This script will help us inspect how InsertExprGeneratorBuilder handles the ts_value_generator method and ensure it correctly processes the new return type from generate_unique_timestamp_for_mysql.


This script will help us inspect how InsertExprGeneratorBuilder handles the ts_value_generator method and ensure it correctly processes the new return type from generate_unique_timestamp_for_mysql.


This script will help us inspect how InsertExprGeneratorBuilder handles the ts_value_generator method and ensure it correctly processes the new return type from generate_unique_timestamp_for_mysql.


Refactor of generate_unique_timestamp_for_mysql verified

The refactor of generate_unique_timestamp_for_mysql to return a TsValueGenerator has been correctly handled in the codebase. The usage of this function in tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs and the handling within InsertExprGeneratorBuilder are consistent with the new return type.

  • Files and usages checked:
    • tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs
    • InsertExprGeneratorBuilder implementation

Everything appears to be correctly updated.

Scripts executed

The following scripts were executed for the analysis:


Script:

#!/bin/bash
# Description: Verify that all usages of `generate_unique_timestamp_for_mysql` are updated.

# Test: Search for the usages of the function. Expect: Correct handling of the new return type.
rg --type rust -e "generate_unique_timestamp_for_mysql" --files-with-matches

Length of output: 155



Script:

#!/bin/bash
# Extract the relevant code from `tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs`
rg -B 5 -A 10 "generate_unique_timestamp_for_mysql" tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs

Length of output: 1545



Script:

#!/bin/bash
# Extract the relevant code from the file defining `InsertExprGeneratorBuilder`
rg "InsertExprGeneratorBuilder" --files-with-matches | xargs -I {} rg -A 10 "InsertExprGeneratorBuilder" {}

Length of output: 3903



Script:

#!/bin/bash
# Extract the relevant code from the file defining `InsertExprGeneratorBuilder`
rg "InsertExprGeneratorBuilder" --files-with-matches | xargs -I {} rg -A 10 "InsertExprGeneratorBuilder" {}

Length of output: 3903



Script:

#!/bin/bash
# Extract the relevant code from the file defining `InsertExprGeneratorBuilder`
rg "InsertExprGeneratorBuilder" --files-with-matches | xargs -I {} rg -A 10 "InsertExprGeneratorBuilder" {}

Length of output: 3903



Script:

#!/bin/bash
# Extract the relevant code from the file defining `InsertExprGeneratorBuilder`
rg "InsertExprGeneratorBuilder" --files-with-matches | xargs -I {} rg -A 10 "InsertExprGeneratorBuilder" {}

Length of output: 3903

tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs (4)

303-313: Add comments to region_distribution

The function region_distribution could benefit from additional comments explaining its role in mapping partitions to datanodes, which would improve code maintainability.

+ // Maps each partition to its corresponding datanode and aggregates the regions under each datanode.
  fn region_distribution(partitions: Vec<Partition>) -> BTreeMap<u64, Vec<RegionId>> {

315-319: Approve logging in pretty_print_region_distribution

The pretty_print_region_distribution function uses structured logging effectively to display the distribution of regions across datanodes. This is a good practice in maintaining clarity in log outputs.


287-301: Improve error handling in collect_table_partitions

The function collect_table_partitions uses .unwrap() which could potentially lead to panics. Replace with proper error handling to make the function more robust.

- let table_partitions = fetch_partitions(&ctx.greptime, table_ctx.name.clone()).await.unwrap();
+ let table_partitions = fetch_partitions(&ctx.greptime, table_ctx.name.clone()).await.context(error::FetchPartitionsSnafu { table_name: &table_ctx.name })?;

Likely invalid or redundant comment.


103-137: Review the use of random generators in critical path

The function generate_create_exprs uses random generators for table names and other parameters. While this is typical in fuzz testing, ensure that the randomness does not introduce flakiness in tests where deterministic outcomes are necessary.

Verification successful

Verified: Randomness in generate_create_exprs is controlled

The function generate_create_exprs is used within the tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs file, which includes RNG seeding. This indicates that the randomness is controlled and should not introduce flakiness in tests.

  • The RNG seeding is present in multiple test files, ensuring controlled randomness.
  • The specific test file using generate_create_exprs also includes RNG seeding.
Scripts executed

The following scripts were executed for the analysis:


Script:

#!/bin/bash
# Description: Verify that the random generation logic does not introduce flakiness.
# Test: Run the generate_create_exprs function multiple times and ensure consistent outcomes where necessary.
echo "Manual verification required: Run the generate_create_exprs function multiple times to check for consistency."

Length of output: 228



Script:

#!/bin/bash
# Search for RNG seeding in the codebase
rg --pcre2 --glob '!target' 'seed|rng.*seed'

# Search for references to `generate_create_exprs` in test files
rg --pcre2 --glob 'tests/**/*.rs' 'generate_create_exprs'

Length of output: 6756



Script:

#!/bin/bash
# Search for references to `generate_create_exprs` in the entire codebase
rg --pcre2 'generate_create_exprs'

Length of output: 273

tests-fuzz/src/utils/wait.rs Show resolved Hide resolved
tests-fuzz/src/utils/cluster_info.rs Show resolved Hide resolved
tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs Outdated Show resolved Hide resolved
tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs Outdated Show resolved Hide resolved
tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs Outdated Show resolved Hide resolved
tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs Outdated Show resolved Hide resolved
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Actionable comments posted: 3

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 00e7d0e and a3cb0bd.

Files ignored due to path filters (1)
  • Cargo.lock is excluded by !**/*.lock
Files selected for processing (15)
  • .github/actions/setup-chaos/action.yml (1 hunks)
  • .github/workflows/develop.yml (1 hunks)
  • Makefile (1 hunks)
  • tests-fuzz/Cargo.toml (3 hunks)
  • tests-fuzz/src/generator/create_expr.rs (3 hunks)
  • tests-fuzz/src/generator/insert_expr.rs (1 hunks)
  • tests-fuzz/src/ir.rs (4 hunks)
  • tests-fuzz/src/ir/insert_expr.rs (1 hunks)
  • tests-fuzz/src/utils.rs (2 hunks)
  • tests-fuzz/src/utils/cluster_info.rs (1 hunks)
  • tests-fuzz/src/utils/crd.rs (1 hunks)
  • tests-fuzz/src/utils/partition.rs (1 hunks)
  • tests-fuzz/src/utils/wait.rs (1 hunks)
  • tests-fuzz/src/validator/row.rs (1 hunks)
  • tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs (1 hunks)
Additional comments not posted (25)
.github/actions/setup-chaos/action.yml (3)

1-2: Ensure clarity in action name and description.

The action name and description are clear and concise, indicating the setup of a Kind cluster, which is appropriate for the context.


14-17: Use of conditional steps and shell commands.

The step to print Chaos Mesh pod information is set to always execute, which is a good practice for debugging. The commands used are standard for checking pod status.


6-12: Validate the setup commands for Kind and Chaos Mesh.

The steps to add the Chaos Mesh Helm repository, create a namespace, and install Chaos Mesh are correctly formatted and use appropriate versions. However, it's essential to ensure that the helm and kubectl commands are available in the runner environment.

tests-fuzz/src/utils/crd.rs (1)

15-16: Visibility of Rust modules.

Making the common and pod modules public is appropriate if they are intended to be used by other parts of the application or library. Ensure that the documentation and interface contracts of these modules are well-defined to prevent misuse.

tests-fuzz/src/utils/cluster_info.rs (1)

31-47: Review of fetch_nodes: Efficient and robust database interaction.

The function fetch_nodes uses sqlx to asynchronously fetch node information from a database. The use of .context from the snafu crate effectively adds context to errors, which is crucial for debugging.

Consider adding more specific error handling or logging within the function to provide detailed diagnostics in case of failure, especially given the critical nature of fetching node data in a distributed system.

tests-fuzz/Cargo.toml (2)

30-31: Dependency declarations for futures and store-api.

The addition of futures and store-api as workspace dependencies is appropriate if they are being used across multiple crates in the workspace. Ensure that these dependencies are indeed utilized to avoid unnecessary bloat.

Also applies to: 59-59


124-129: Declaration of new binary fuzz_failover_mito_regions.

The new binary fuzz_failover_mito_regions is correctly configured with its path and flags. This setup is crucial for ensuring that the binary is built and managed correctly by Cargo. Make sure the path to the binary is correct and that the binary is integrated into the build process.

tests-fuzz/src/utils/partition.rs (1)

52-71: Review of fetch_partitions: Ensure proper handling of Ident type

The function fetch_partitions correctly uses parameterized queries which is good for security. However, the .bind method is called with table_name.value.to_string(), which might not be the most efficient way if Ident can be directly bound as a parameter. If Ident implements traits to support direct binding, consider using it directly.

Verification successful

Conclusion: Ident cannot be directly used with sqlx bind

The Ident type in tests-fuzz/src/ir.rs does not implement traits required for direct binding with sqlx (such as Encode or Type). Therefore, the current use of table_name.value.to_string() in the .bind method is appropriate.

  • tests-fuzz/src/ir.rs:
    • impl From<&str> for Ident
    • impl From<String> for Ident
    • impl fmt::Display for Ident
Scripts executed

The following scripts were executed for the analysis:


Script:

#!/bin/bash
# Description: Check if Ident type can be directly used with sqlx bind.

# Test: Search for Ident implementation details related to sqlx binding.
rg --type rust "impl .* for Ident" src/ir.rs

Length of output: 96



Script:

#!/bin/bash
# Description: Check if Ident type can be directly used with sqlx bind by searching for relevant trait implementations.

# Search for Ident type definition and its implementations across the entire codebase
rg --type rust "struct Ident" 
rg --type rust "impl .* for Ident"

Length of output: 259

tests-fuzz/src/ir/insert_expr.rs (2)

19-19: Approval of the import changes

The import of Ident from crate::ir is correctly done to support the changes in the InsertIntoExpr structure.


Line range hint 106-106: Ensure proper handling of Ident in InsertIntoExpr

The change to use Ident instead of String for table_name in InsertIntoExpr is a good practice for type safety and better management of identifiers. Ensure that all usages of InsertIntoExpr across the codebase are updated to handle Ident correctly.

tests-fuzz/src/utils.rs (2)

15-22: Approval of module declarations

The addition of cluster_info, config, crd, health, partition, process, and wait modules is approved. Ensure that these modules are well-documented and have corresponding tests to verify their functionality.


95-97: Review of new constants

The addition of GT_FUZZ_CLUSTER_NAMESPACE and GT_FUZZ_CLUSTER_NAME constants is a good practice for managing configuration. Ensure these constants are used consistently across the codebase.

Verification successful

Constants Usage Verified

The constants GT_FUZZ_CLUSTER_NAMESPACE and GT_FUZZ_CLUSTER_NAME are defined and used correctly in the codebase.

  • Defined in: tests-fuzz/src/utils.rs
  • Used in: tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs

The usage of these constants in the fuzz_failover_mito_regions.rs file is consistent with their intended purpose for managing configurations.

Scripts executed

The following scripts were executed for the analysis:


Script:

#!/bin/bash
# Description: Verify the usage of new constants across the codebase.

# Test: Search for the usage of `GT_FUZZ_CLUSTER_NAMESPACE` and `GT_FUZZ_CLUSTER_NAME`.
rg --type rust "GT_FUZZ_CLUSTER_NAMESPACE|GT_FUZZ_CLUSTER_NAME" --files-with-matches

Length of output: 168



Script:

#!/bin/bash
# Extract the lines where the constants are used in the specified file.
rg "GT_FUZZ_CLUSTER_NAMESPACE|GT_FUZZ_CLUSTER_NAME" tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs

Length of output: 360

tests-fuzz/src/generator/insert_expr.rs (1)

106-106: Ensure correct handling of Ident in expression generation

The use of Ident for table_name in the InsertIntoExpr struct is correctly implemented. Ensure that all related functionalities that utilize this struct handle Ident properly to avoid type mismatches or runtime errors.

Makefile (1)

173-176: New fuzz-ls target added correctly.

The addition of the fuzz-ls target in the Makefile is correctly implemented and marked as .PHONY. This target will help in listing all available fuzz targets, which is useful for debugging and development.

Verification successful

New fuzz-ls target added correctly.

The addition of the fuzz-ls target in the Makefile is correctly implemented and marked as .PHONY. This target will help in listing all available fuzz targets, which is useful for debugging and development.

  • .PHONY: fuzz-ls
  • fuzz-ls:
    • cargo fuzz list --fuzz-dir tests-fuzz
Scripts executed

The following scripts were executed for the analysis:


Script:

#!/bin/bash
# Description: Verify the new `fuzz-ls` target functions as expected.

# Test: Execute the `fuzz-ls` target. Expect: Successful execution without errors.
make fuzz-ls

Length of output: 86



Script:

#!/bin/bash
# Verify the existence and structure of the `fuzz-ls` target in the Makefile.

# Search for the `fuzz-ls` target in the Makefile and display its surrounding lines.
rg -A 3 '^\s*\.PHONY:\s*fuzz-ls' Makefile

Length of output: 109

tests-fuzz/src/ir.rs (3)

42-42: Import additions are appropriate.

The new imports are relevant to the changes made in the timestamp generation functionality, ensuring that the necessary modules and traits are available in the scope.


255-257: Utility method is_empty added to Ident.

The addition of the is_empty method to the Ident struct is a useful utility that enhances the usability of the Ident type by allowing easy checks for empty identifiers. This is particularly useful in validation scenarios where identifiers are expected to be non-empty.


Line range hint 130-142: Refactor of timestamp generation to use TsValueGenerator.

The refactoring of the generate_unique_timestamp_for_mysql function to use TsValueGenerator is a significant improvement. It abstracts the generation logic into a more reusable and testable format. Ensure that this new approach is covered by unit tests, especially since it involves atomic operations which are critical to get right.

tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs (6)

321-432: Ensure proper error handling and resource cleanup

In the execute_failover function, the pod failure is injected (line 354) and supposed to be recovered (line 379), but there's no error handling to ensure that recovery happens if any steps in between throw an error. Consider using a defer pattern or similar to guarantee cleanup.

// Suggested refactor to ensure cleanup even if an error occurs
async fn execute_failover(ctx: FuzzContext, input: FuzzInput) -> Result<()> {
    let chaos_name = inject_pod_failure(&ctx, selected_datanode, 360).await?;
    let cleanup = scopeguard::defer(|| {
        let _ = recover_pod_failure(&ctx, &chaos_name).await;
    });

    // rest of the function...

    cleanup.dismiss();  // Only dismiss if everything was successful
    Ok(())
}

197-226: Add error handling in inject_pod_failure

The function inject_pod_failure lacks comprehensive error handling. Currently, it unwraps the result of the Kubernetes API call, which could panic in case of an error. Consider handling errors gracefully to avoid crashes during tests.

- api.create(&Default::default(), &cr).await.unwrap();
+ match api.create(&Default::default(), &cr).await {
+     Ok(_) => info!("Pod failure injected successfully."),
+     Err(e) => return Err(Error::from(e)),
+ }

228-232: Ensure error handling in recover_pod_failure

Similar to the inject_pod_failure function, recover_pod_failure directly unwraps the result of the Kubernetes API call. Implement error handling to ensure the function does not cause a panic if the API call fails.

- api.delete(name, &Default::default()).await.unwrap();
+ match api.delete(name, &Default::default()).await {
+     Ok(_) => info!("Pod recovery successful."),
+     Err(e) => return Err(Error::from(e)),
+ }

234-285: Refactor error handling in execute_insert_exprs

The function execute_insert_exprs uses .unwrap() within an async block, which could lead to panics if errors occur. Refactor to use proper error handling and potentially return detailed error information to the caller.

- let _permit = semaphore.acquire().await.unwrap();
- let sql = translator.translate(&insert_expr)?;
+ let _permit = semaphore.acquire().await?;
+ let sql = translator.translate(&insert_expr).context(error::TranslateQuerySnafu { expr: &insert_expr })?;

358-375: Ensure robust error handling in wait_condition_fn

The wait_condition_fn uses unwrapping in several places, which could lead to panics if unexpected conditions occur. Enhance error handling to make the function more resilient and less prone to crashes.

- let partition = count_partitions(&greptime, selected_datanode).await.unwrap();
+ let partition = count_partitions(&greptime, selected_datanode).await.context(error::CountPartitionsSnafu { datanode_id: selected_datanode })?;

434-450: Improve error messages in fuzzing entry point

The main fuzzing entry point could benefit from more descriptive error messages, especially when initialization fails. This would help in debugging and maintaining the code.

- mysql.expect("mysql connection init must be succeed"),
- kube::client::Client::try_default().await.expect("init kube client"),
+ mysql.context(error::InitDbConnectionSnafu)?,
+ kube::client::Client::try_default().await.context(error::InitKubeClientSnafu)?,
tests-fuzz/src/generator/create_expr.rs (1)

Line range hint 47-193: Review changes to CreateTableExprGenerator

The change from String to Ident for the name field in CreateTableExprGenerator is a significant modification. This change aligns with the overall goal of improving type safety and clarity in table name handling. The use of the Ident type ensures that the table names are handled more consistently and can support more complex naming conventions including those requiring quoting or escaping.

Ensure that all usages of this generator have been updated to handle the Ident type appropriately. This includes checking that any serialization or deserialization code, logging, or error handling that might rely on the table name being a simple string is updated to handle the Ident type.

Additionally, review related functions and methods to ensure they do not perform unnecessary conversions or checks that might be handled by the Ident type itself.

.github/workflows/develop.yml (1)

412-536: Review of the New Distributed Fuzz Test with Chaos Job

  1. Job Setup and Dependencies:

    • The job correctly specifies runs-on: ubuntu-latest and depends on build-greptime-ci. This setup ensures that the job runs on a fresh virtual environment and only starts after the necessary build job completes.
  2. Strategy Matrix:

    • The matrix setup for target and mode is well-defined, focusing on a specific fuzz target and environment setup. This allows for targeted testing under specific conditions, which is excellent for isolating and reproducing issues.
  3. Service Setup:

    • The steps to set up Kind, Chaos Mesh, Minio, and Kafka are well-organized. However, using .github/actions/setup-kind and similar custom actions for setup tasks is crucial to maintain as updates to these actions can directly affect the workflow's reliability and performance.
  4. Environment Configuration:

    • The use of environment variables like CUSTOM_LIBFUZZER_PATH and GT_MYSQL_ADDR is appropriate. These are essential for configuring the fuzz test environment correctly.
  5. Resource Cleanup:

    • The steps to delete the cluster and clean up Docker resources are crucial to prevent resource leakage. This is particularly important in CI environments where resources are limited.
  6. Potential Improvements:

    • Consider parameterizing the ubuntu-latest runner to use a specific version for more consistent results across runs.
    • The cleanup commands could be placed in a separate job that always runs regardless of success or failure to ensure cleanup happens even if the job is canceled or fails unexpectedly.

Overall, the job setup looks robust with a focus on detailed testing and environment isolation, which is crucial for fuzz testing.

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Actionable comments posted: 0

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Review profile: CHILL

Commits

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Files selected for processing (1)
  • tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs (1 hunks)
Additional comments not posted (5)
tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs (5)

197-226: Add error handling in inject_pod_failure

The function inject_pod_failure lacks comprehensive error handling. Currently, it unwraps the result of the Kubernetes API call, which could panic in case of an error. Consider handling errors gracefully to avoid crashes during tests.

- api.create(&Default::default(), &cr).await.unwrap();
+ match api.create(&Default::default(), &cr).await {
+     Ok(_) => info!("Pod failure injected successfully."),
+     Err(e) => return Err(Error::from(e)),
+ }

228-232: Ensure error handling in recover_pod_failure

Similar to the inject_pod_failure function, recover_pod_failure directly unwraps the result of the Kubernetes API call. Implement error handling to ensure the function does not cause a panic if the API call fails.

- api.delete(name, &Default::default()).await.unwrap();
+ match api.delete(name, &Default::default()).await {
+     Ok(_) => info!("Pod recovery successful."),
+     Err(e) => return Err(Error::from(e)),
+ }

234-285: Refactor error handling in execute_insert_exprs

The function execute_insert_exprs uses .unwrap() within an async block, which could lead to panics if errors occur. Refactor to use proper error handling and potentially return detailed error information to the caller.

- let _permit = semaphore.acquire().await.unwrap();
- let sql = translator.translate(&insert_expr)?;
+ let _permit = semaphore.acquire().await?;
+ let sql = translator.translate(&insert_expr).context(error::TranslateQuerySnafu { expr: &insert_expr })?;

358-375: Ensure robust error handling in wait_condition_fn

The wait_condition_fn uses unwrapping in several places, which could lead to panics if unexpected conditions occur. Enhance error handling to make the function more resilient and less prone to crashes.

- let partition = count_partitions(&greptime, selected_datanode).await.unwrap();
+ let partition = count_partitions(&greptime, selected_datanode).await.context(error::CountPartitionsSnafu { datanode_id: selected_datanode })?;

434-450: Improve error messages in fuzzing entry point

The main fuzzing entry point could benefit from more descriptive error messages, especially when initialization fails. This would help in debugging and maintaining the code.

- mysql.expect("mysql connection init must be succeed"),
- kube::client::Client::try_default().await.expect("init kube client"),
+ mysql.context(error::InitDbConnectionSnafu)?,
+ kube::client::Client::try_default().await.context(error::InitKubeClientSnafu)?,

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codecov bot commented Jun 25, 2024

Codecov Report

Attention: Patch coverage is 2.47525% with 197 lines in your changes missing coverage. Please review.

Project coverage is 84.53%. Comparing base (8cbe716) to head (ed3c018).
Report is 8 commits behind head on main.

Additional details and impacted files
@@            Coverage Diff             @@
##             main    #4188      +/-   ##
==========================================
- Coverage   84.89%   84.53%   -0.36%     
==========================================
  Files        1039     1044       +5     
  Lines      182758   183697     +939     
==========================================
+ Hits       155150   155294     +144     
- Misses      27608    28403     +795     

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Actionable comments posted: 2

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Review profile: CHILL

Commits

Files that changed from the base of the PR and between 330bc7f and 234677f.

Files selected for processing (2)
  • .github/actions/setup-greptimedb-cluster/action.yml (2 hunks)
  • .github/workflows/develop.yml (1 hunks)
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.github/workflows/develop.yml (1)

412-537: Review the new job distributed-fuzztest-with-chaos.

The new job distributed-fuzztest-with-chaos is well-structured and includes necessary steps for setting up and executing fuzz tests with chaos engineering. However, ensure that the setup-chaos action (line 429) is fully implemented and tested since it's critical for the chaos testing aspect of this job. Additionally, verify that all environment variables and paths set in this job are correct and secure.

Verification successful

The setup-chaos action is implemented.

The setup-chaos action is fully implemented and includes steps to deploy Chaos Mesh using Helm. The action creates a namespace for Chaos Mesh, installs it, and prints the status of the pods.

  • File: .github/actions/setup-chaos/action.yml

    name: Setup Kind
    description: Deploy Kind
    runs:
      using: composite
      steps:
      - uses: actions/checkout@v4
      - name: Create kind cluster
        shell: bash
        run: |
          helm repo add chaos-mesh https://charts.chaos-mesh.org
          kubectl create ns chaos-mesh
          helm install chaos-mesh chaos-mesh/chaos-mesh -n=chaos-mesh --version 2.6.3
      - name: Print Chaos-mesh
        if: always()
        shell: bash
        run: | 
          kubectl get po -n chaos-mesh

The setup-chaos action appears to be correctly implemented and ready for use in the workflow.

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Script:

#!/bin/bash
# Check if the setup-chaos action is implemented and verify its contents.
cat ./.github/actions/setup-chaos

Length of output: 86



Script:

#!/bin/bash
# List files in the setup-chaos directory and view their contents
echo "Listing files in .github/actions/setup-chaos:"
ls ./.github/actions/setup-chaos

echo "Contents of files in .github/actions/setup-chaos:"
for file in ./.github/actions/setup-chaos/*; do
  echo "File: $file"
  cat "$file"
  echo "-------------------"
done

Length of output: 946

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  • tests-fuzz/src/utils.rs (3 hunks)
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tests-fuzz/src/utils.rs (2)

15-22: Addition of new modules and constants

The addition of cluster_info, config, crd, health, partition, and wait modules expands the utility functions available for fuzz testing. Ensure these modules are properly documented and tested, especially since they seem to interact with potentially complex functionalities like cluster management and partition handling.


93-94: Introduction of new constants for cluster configuration

The introduction of GT_FUZZ_CLUSTER_NAMESPACE and GT_FUZZ_CLUSTER_NAME constants is a positive change as it standardizes the configuration and makes the codebase more maintainable. It's essential to ensure that these constants are used consistently across the codebase.

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Actionable comments posted: 1

Outside diff range and nitpick comments (3)
tests-fuzz/src/utils.rs (3)

Line range hint 67-79: Improve Error Handling in Environment Variable Loading

The use of expect in load_unstable_test_env_variables can lead to panics if the environment variables are not set, which is not ideal for production code. Consider using more graceful error handling to improve the robustness of the code.

- let binary_path = env::var(GT_FUZZ_BINARY_PATH).expect("GT_FUZZ_BINARY_PATH not found");
+ let binary_path = env::var(GT_FUZZ_BINARY_PATH).unwrap_or_else(|_| "default_binary_path".to_string());

Line range hint 95-112: Secure and Optimize Database Operation Functions

The functions flush_memtable and compact_table use dynamic SQL generation, which can be susceptible to SQL injection if not handled correctly. Ensure that inputs like table_name are properly sanitized before use in SQL queries. Additionally, consider using parameterized queries to enhance security and performance.

- let sql = format!("SELECT flush_table(\"{}\")", table_name);
+ let sql = "SELECT flush_table(?)";
- let result = sqlx::query(&sql).execute(e).await.context(error::ExecuteQuerySnafu { sql })?;
+ let result = sqlx::query(sql).bind(table_name).execute(e).await.context(error::ExecuteQuerySnafu { sql })?;

[!TIP]
Codebase Verification

Ensure Robust Error Handling in Database Connection Setup

The functions init_greptime_connections_via_env and init_greptime_connections in tests-fuzz/src/utils.rs use unwrap() for error handling, which can cause the program to panic if an error occurs. This is not recommended for robust error handling, especially in production code.

  • Line 63: let mut opts: MySqlConnectOptions = format!("mysql://{addr}/public").parse().unwrap();
  • Line 64: Some(MySqlPoolOptions::new().connect_with(opts).await.unwrap())

Consider replacing unwrap() with proper error handling to ensure the program can handle errors gracefully.

Analysis chain

Line range hint 30-60: Review Database Connection Setup Functions

The implementation of init_greptime_connections_via_env and init_greptime_connections uses environment variables to configure database connections, which is standard. However, it is crucial to ensure robust error handling and security practices around database connections, especially when dealing with potentially sensitive information like database addresses.

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# Description: Verify robust error handling in database connection setup functions.

# Test: Search for error handling patterns in the functions.
rg --type rust "unwrap()" -- "src/utils.rs"

Length of output: 96



Script:

#!/bin/bash
# Description: Locate the correct file path for utils.rs.

# Search for the file named utils.rs in the repository.
fd utils.rs

Length of output: 657



Script:

#!/bin/bash
# Description: Verify robust error handling in database connection setup functions in tests-fuzz/src/utils.rs.

# Test: Search for error handling patterns in the functions.
rg --type rust "unwrap()" -- "tests-fuzz/src/utils.rs"

Length of output: 221

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Files selected for processing (3)
  • .github/actions/setup-greptimedb-cluster/action.yml (2 hunks)
  • .github/workflows/develop.yml (1 hunks)
  • tests-fuzz/src/utils.rs (3 hunks)
Files skipped from review as they are similar to previous changes (2)
  • .github/actions/setup-greptimedb-cluster/action.yml
  • .github/workflows/develop.yml

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  • tests-fuzz/src/utils.rs (3 hunks)
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tests-fuzz/src/utils.rs (2)

58-60: Refactor Connection Initialization

The refactoring to use MySqlConnectOptions and disabling logging with LevelFilter::Off is a good practice for production environments where verbose logging might be undesirable. However, ensure that errors during connection setup are gracefully handled and logged appropriately to avoid silent failures.


93-94: Validate the Usage of New Constants

Ensure that GT_FUZZ_CLUSTER_NAMESPACE and GT_FUZZ_CLUSTER_NAME are used consistently across the testing framework. These constants are crucial for identifying and configuring cluster-related settings in fuzz tests.

Verification successful

Consistent Usage of New Constants Verified

The constants GT_FUZZ_CLUSTER_NAMESPACE and GT_FUZZ_CLUSTER_NAME are defined in tests-fuzz/src/utils.rs and are used consistently in tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs for environment variable retrieval.

  • tests-fuzz/src/utils.rs: Constants are defined.
  • tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs: Constants are used to fetch environment variables for namespace and cluster name.
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#!/bin/bash
# Description: Verify the consistent usage of the new constants across the testing framework.

# Test: Search for constant usage. Expect: Consistent and correct usage across all related files.
rg --type rust $'GT_FUZZ_CLUSTER_NAMESPACE|GT_FUZZ_CLUSTER_NAME' -C 3

Length of output: 2070

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WenyXu commented Jun 28, 2024

@coderabbitai resolve

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Files selected for processing (6)
  • tests-fuzz/src/utils.rs (3 hunks)
  • tests-fuzz/src/utils/cluster_info.rs (1 hunks)
  • tests-fuzz/src/utils/partition.rs (1 hunks)
  • tests-fuzz/src/utils/pod_failure.rs (1 hunks)
  • tests-fuzz/src/utils/wait.rs (1 hunks)
  • tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs (1 hunks)
Additional comments not posted (4)
tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs (4)

59-69: Ensure proper resource cleanup in FuzzContext

The close method of FuzzContext properly awaits the closure of the greptime database connection. Ensure this method is called in all exit paths to prevent resource leaks.


99-133: Review of generate_create_exprs function

This function correctly generates table creation expressions. However, consider documenting the use of random values to ensure test reproducibility.


161-190: Review of generate_insert_exprs function

The function correctly generates insert expressions based on the provided parameters and handles optional column lists effectively.


246-260: Review of collect_table_partitions function

This function correctly fetches and logs partition data for each table context. Good use of async/await and error handling.

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  • tests-fuzz/src/utils.rs (3 hunks)
  • tests-fuzz/src/utils/cluster_info.rs (1 hunks)
  • tests-fuzz/src/utils/partition.rs (1 hunks)
  • tests-fuzz/src/utils/pod_failure.rs (1 hunks)
  • tests-fuzz/src/utils/wait.rs (1 hunks)
  • tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs (1 hunks)
Files not reviewed due to errors (1)
  • tests-fuzz/targets/failover/fuzz_failover_mito_regions.rs (no review received)
Files skipped from review as they are similar to previous changes (4)
  • tests-fuzz/src/utils.rs
  • tests-fuzz/src/utils/cluster_info.rs
  • tests-fuzz/src/utils/pod_failure.rs
  • tests-fuzz/src/utils/wait.rs
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tests-fuzz/src/utils/partition.rs (4)

39-56: Security Best Practice: Use of Parameterized Queries

The function count_partitions uses parameterized queries which is a good practice for security. This helps in preventing SQL injection attacks.


58-77: Security Best Practice: Secure Query Handling

The function fetch_partitions correctly uses parameterized queries to ensure security and prevent SQL injection. Error handling is appropriately managed using the context method.


79-92: Good Implementation of Region Distribution Mapping

The function region_distribution is implemented efficiently using BTreeMap for mapping datanode IDs to regions. This is a clean and efficient use of Rust's standard library.


94-101: Effective Logging in Region Distribution

The function pretty_print_region_distribution effectively logs the number of regions for each datanode, which is crucial for monitoring and debugging purposes.

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WenyXu commented Jun 28, 2024

@coderabbitai resolve

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LGTM

@fengjiachun fengjiachun added this pull request to the merge queue Jun 28, 2024
Merged via the queue into GreptimeTeam:main with commit 352cc9d Jun 28, 2024
56 checks passed
zyy17 pushed a commit to zyy17/greptimedb that referenced this pull request Jun 28, 2024
* test: add e2e test for region failover

* chore: add ci cfg

* chore: reduce parallelism to 8

* fix(ci): enable region failure

* chore: set sqlx LogLevel to Off

* refactor: move help functions to utils
zyy17 pushed a commit to zyy17/greptimedb that referenced this pull request Jun 28, 2024
* test: add e2e test for region failover

* chore: add ci cfg

* chore: reduce parallelism to 8

* fix(ci): enable region failure

* chore: set sqlx LogLevel to Off

* refactor: move help functions to utils
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