CHANGELOG.md

Changelog

Notes

1. All notable changes to this project will be documented in this file.
2. Records in this file are not identical to the title of their Pull Requests. A detailed description is necessary for understanding what changes are and why they are made.

v0.9.1 - 2024-02-26

Enhancements

• Improved the garbage collection efficiency of the otelexporter component, resulting in a noticeable reduction in the CPU usage of the agent. #623

v0.9.0 - 2024-02-02

Enhancements

• Add periodic memory cleanup for OtelExporter. This can slightly slow down the rate of memory growth. Users can configure the restart period in hours. Disabled by deafult. (#577)
• Added an extra application for collecting k8s metadata named metadata-provider,with an API that list/watch k8s metadata. More Detail at readme of metaprovider (#580,#595,#596)

Bug fixes

• Fix the bug that the agent writes a lot of kernel logs when using kernel module as the driver. (#590)
• Fix the bug that the View Mode and Show Services in the topology panel are not displayed. (#579)

v0.8.1 - 2023-09-01

Enhancements

• Improve the Grafana plugin's performance by reducing the amount of data requiring queries. Now the plugin queries through Grafana's api proxy. (#555)
• Expand the histogram bucket of otelexpoerter (Add 1500ms). (#563)
• Set default values of store_external_src_ip and StoreExternalSrcIP to false to reduce occurrences of unexpected src IP data. (#562)
• Increase maximum throughput capacity for event handling. Optimized the networkanalyzer component of the probe analyzer by utilizing Go's goroutines, enabling concurrent execution. (#558)
• Add a new configuration option ignore_dns_rcode3_error to allow users to specify whether DNS responses with RCODE 3 should be treated as errors. (#566)
• Improve event processing efficiency with batch event retrieval in cgo. (#560)
• Reduce the data volume of the kindling_k8s_workload_info metric by having each agent only send workloads present on its own node.(#554)
• Provide a new self metric for probe events, including the count of skipped and dropped events. (#553)

Bug fixes

• Fix the bug where DNS resolution would fail when UDP packets were received out of order. (#565)
• Add periodic cleanup of javatraces data to prevent continuous memory growth when trace-profiling is enabled. (#514)

In this release, we have a new contributor @YDMsama. Thanks and welcome! 🥳

v0.8.0 - 2023-06-30

New features

• Provide a new metric called kindling_k8s_workload_info, which supports workload filtering for k8s, thus preventing frequent crashes of Grafana topology. Please refer to the doc for any limitations.(#530)
• Added support for displaying trace-profiling data by querying from Elasticsearch. (#528)
• Display scheduler run queue latency on Trace-Profiling chart. To learn more about the concept of 'Run Queue Latency', refer to this blog post. You can also find a use case for this feature in this blog post. (#494)

Enhancements

• Upgrade the Grafana version to 8.5.26 (#533)
• MySQL CommandLine Case: Ignore quit command and get sql with CLIENT_QUERY_ATTRIBUTES(#523)
• ⚠️Breaking change: Refactor the data format of on/off CPU events from "string" to "array". Note that the old data format cannot be parsed using the new version of the front-end.(#512 #520)

Bug fixes

• Fix the bug where the DNS domain is not obtained when DNS transport over TCP. (#524)
• Fix panic: send on closed channel. (#519)
• Fix the bug that the event detail panel doesn't hide when switching profiles.(#513)
• Fix span data deduplication issue.(#511)

In this release, we have a new contributor @hwz779866221. Thanks and welcome! 🥳

v0.7.2 - 2023-04-24

Enhancements

• Add an option WithMemory to OpenTelemetry's Prometheus exporter. It allows users to control whether metrics that haven't been updated in the most recent interval are reported. (#501)
• Add a config to cgoreceiver for suppressing events according to processes' comm (#495)
• Add bind syscall support to get the listening ip and port of a server. (#493)
• Add an option enable_fetch_replicaset to control whether to fetch ReplicaSet metadata. The default value is false which aims to release pressure on Kubernetes API server. (#492)

Bug fixes

• Fix the memory leak issue by deleting vtid-tid map to avoid OOM. (#499)
• Fix unrunnable bug due to the error Insufficient parameters of TCP retransmit. (#499)
• Fix the bug that in cpuanalyzer, no segments are sent if they contain no cpuevents. Now segments are sent as long as they contain events, regardless of what the events are. (#502)
• Fix the bug that the default configs of slice/map are not overridden. (#497)

Thanks for the significant help of @yanhongchang to provide OOM-killed information on #499.

v0.7.1 - 2023-03-01

New features

• Support trace-profiling sampling to reduce data output. One trace is sampled every five seconds for each endpoint by default. (#446#462)

Enhancements

• Upgrade the golang version to v1.19 in the requirement. (#463)
• Improve Kindling Event log format. (#455)

Bug fixes

• Fix security alerts(CVE-2022-41721, CVE-2022-27664) by upgrading package golang.org/x/net.(#463)
• Fix the potential endless loop in the rocketmq parser. (#465)
• Fix retransmission count is not consistent with the real value on Linux 4.7 or higher. (#450)
• Reduce the cases pods are not found when they are daemonset. (#439 @llhhbc)
• Collector subscribes sendmmsg events to fix the bug that some DNS requests are missed. (#430)
• Fix the bug that the agent panics when it receives DeletedFinalStateUnknown by watching K8s metadata. (#456)

In this release, we have a new contributor @llhhbc. Thanks and welcome! 🥳

v0.7.0 - 2023-02-16

New features

• Add a new simplified chart to display the trace-profiling data. It mixes span with profiling and is more user-friendly. Try the demo now on the website.(#443)
• Add trace to cpuevents to display the payload of network flows. (#442)
• Support Attach Agent for NoAPM Java Application. (#431)

Enhancements

• Add an option edge_events_window_size to allow users to reduce the size of the files by narrowing the time window where seats the edge events. (#437)
• Rename the camera profiling file to make the timestamp of the profiling files readable. (#434)
• When using the file writer in cameraexporter, we rotate files in chronological order now and rotate half of files one time. (#420)
• Support to identify the MySQL protocol with statements commit and set. (#417)

Bug fixes

• Fix the bug that TCP metrics are not aggregated correctly. (#444)
• Fix the bug that cpuanalyzer missed some trigger events due to the incorrect variable reference. This may cause some traces can't correlate with on/off CPU data. (#424)

v0.6.0 - 2022-12-21

New features

• Support to configure snaplen through startup args.(#387)
• Add tracing span data in cpu events. (#384)
• Add a new tool: A debug tool for Trace Profiling is provided for developers to troubleshoot problems.(#363)
• Support the protocol RocketMQ.(#328)

Enhancements

• Add self-monitor tool: include kernel event log and gdb information of exit.(#398)
• Adjust max depth of stack trace to 20. (#399)
• Add the field end_timestamp to the trace data to make it easier for querying. (#380)
• Add request_tid and response_tid for trace labels.(#379)
• Add no_response_threshold(120s) for No response requests. (#376)
• Add payload for all protocols.(#375)
• Add a new clustering method "blank" that is used to reduce the cardinality of metrics as much as possible. (#372)
• Modify the configuration file structure and add parameter fields for subscription events. (#368)

Bug fixes

• Add the missing timestamp of TCP connect data and filter the incorrect one without srcPort.(#405)
• Fix the bug that multiple events cannot be correlated when they are in one ON-CPU data. (#395)
• Add the missed latency field for cgoEvent to fix the bug where the request_sent_time in single_net_request_metric_group is always 0. (#394)
• Fix http-100 request is detected as NOSUPPORT(#393)
• Fix the wrong thread name in the trace profiling function. (#385)
• Remove "reset" method of ScheduledTaskRoutine to fix a potential dead-lock issue. (#369)
• Fix the bug where the pod metadata with persistent IP in the map is deleted incorrectly due to the deleting mechanism with a delay. (#374)
• Fix the bug that when the response is nil, the NAT IP and port are not added to the labels of the "DataGroup". (#378)
• Fix potential deadlock of exited thread delay queue. (#373)
• Fix the bug that cpuEvent cache size continuously increases even if trace profiling is not enabled.(#362)
• Fix the bug that duplicate CPU events are indexed into Elasticsearch. (#359)
• Implement the delay queue for exited thread, so as to avoid losing the data in the period before the thread exits. (#365)
• Fix the bug of incomplete records when threads arrive at the cpu analyzer for the first time. (#364)

v0.5.0 - 2022-11-02

New features

• Add a new feature: Trace Profiling. See more details about it on our website. (#335)

Enhancements

• Add request and response payload of Redis protocol message to Span data. (#325)

Bug fixes

• Fix the topology node naming error in the default namespace.(#346)
• Fix the bug that if ReadBytes receives negative numbers as arguments, the program panics with the error of slice outofbound. (#327)

v0.4.1 - 2022-09-21

Enhancements

• When processing Redis' Requests, add additional labels to describe the key information of the message. Check Metrics Document for more details. (#321)

Bug fixes

• Fix the bug when the kernel does not support some kprobe, the probe crashes. (#320)

v0.4.0 - 2022-09-19

Enhancements

• Optimize the log output. (#299)
• Print logs when subscribing to events. Print a warning message if there is no event the agent subscribes to. (#290)
• Allow the collector run in the non-Kubernetes environment by setting the option enable false under the k8smetadataprocessor section. (#285)
• Add a new environment variable: IS_PRINT_EVENT. When the value is true, sinsp events can be printed to the stdout. (#283)
• Declare the 9500 port in the agent's deployment file (#282)

Bug fixes

• Avoid printing logs to console when both observability.logger.file_level and observability.logger.console_level are set to none(#316)
• Fix the userAttributes array out of range error caused by userAttNumber exceeding 8
• Fix the bug where no HTTP headers were got. (#301)
• Fix the bug that need_trace_as_span options cannot take effect (#292)
• Fix connection failure rate data lost when change topology layout in the Grafana plugin. (#289)
• Fix the bug that the external topologys' metric name is named with kindling_entity_request prefix. Change the prefix of these metrics to kindling_topology_request (#287)
• Fix the bug where the table name of SQL is missed if there is no trailing character at the end of the table name. (#284)

v0.3.0 - 2022-06-29

New features

• Add an option name debug_selector to filter debug_log from different components (#300)
• Add a URL clustering method to reduce the cardinality of the entity metrics. Configuration options are provided to choose which method to use. (#268)
• Display connection failure metrics in the Grafana-plugin (#255)
• Add the metrics that describe how many times the TCP connections have been made (#234 #235 #236 #237)
• Add a histogram aggregator in defaultAggregator (#226)
• (Experimental) Support Protocol Dubbo2 (#184)

Enhancements

• Improve the go project layout (#273)
• Correct the configurations and disable the dubbo protocol parser by default since it is still experimental now. (#270)
• Implement self-metrics using opentelemetry for cgoreceiver (#269)
• Use cgo to replace UDS for transferring data from the probe to the collector to improve the performance (#264)
• Add command labels in tcp connect metrics and span attributes (#260)
• Use the tcp_close events to generate the srtt metric (#256)
• Remove the histogram metrics by default to reduce the number of metrics (#253)
• k8sprocessor: use src IP for further searching if the dst IP is a loopback address (#251)
• docs:update developer links (#247)
• Add some self metrics for agent cpu and memory usage (#243)
• Export the trace of MySQL request when it contains an error (#241)
• Block in the application instead of the udsreceiver after running (#240)
• Decouple the logic of dispatching events from receivers (#232)
• Search for k8s metadata using src_ip when no containerid found (#233)
• Record the containers with hostport mode and fill the pod information of them in k8sprocessor (#219)
• Support building Grafana-plugin by using Actions (#218)
• Improve metrics description doc (#216)
• Update deployment files needed for releasing (#215)

Bug fixes

• docs: fix language issues in documents (#258)
• Fix the bug where the pod information is missed after it is restarted (#245)
• Grafana-plugin: delete yarn.lock to remove unnecessary dependencies (#244)
• Fix the bug that the container name is incorrect when multiple containers in the pod don't specify ports by setting it empty. (#238)
• Fix the bug that sometimes the workload kind is ReplicaSet (#230)
• Fix "no such file or directory" when using the kubeconfig file. #225
• Fix several bugs in the Grafana plugin. (#220)

v0.2.0 - 2022-05-07

Features

• Provide a kindling Prometheus exporter that can support integration with Prometheus easily. See kindling's metrics from the kindling website.
• Support network performance, DNS performance, service network maps, and workload performance analysis.
• Support HTTP, MySQL, and REDIS request analysis.
• Provide a Grafana-plugin with four built-in dashboards to support basic analysis features.