Highlights:

• Added support for fanotify for a faster and more reliable cgroup monitoring (#244, #263, #264, #265, #266, #279, #288)
• Added builds with built-in libbpf (now preferred) and system provided libbpf (#286)
• Started publishing Docker images on GitHub (#271, #290, #291, #292, #293, #294, #295)

New examples:

• Added icmp-ip example with inet_ip decoder (#251)
• Added pci_vendor, pci_device, pci_class, pci_subclass decoders with examples (#255, #274)
• Added kstack decoder with an example (#313)
• Added unix-socket-backlog example (#284)
• Added softirq-latency example (#300, #304)
• Added softirq-latency-net-rx example that's an array based version of softirq-latency (#310)
• Added cfs-throttling example (#311)
• Added tcp-retransmit example (#318, #335)

Changes to examples:

• Added jsonschema for examples and cleaned up unused keys (#314)
• Added exp2zero histogram type for cases when 0 is a significant outcome and added tcp-syn-backlog-exp2zero example (#280)
• Fixed uint decoder for very large numbers (#296)
• Removed copy-pasted division by 50 in tcp-syn-backlog-exp2zero example (#301)
• Added increment_exp2zero_histogram helper macro for examples (#302)
• Added {increment_map,increment_{exp2,ex2zero}_histogram}_nosync helper macros (#303, #305)
• Fixed tcp-syn-backlog example with linear histogram (#306)
• Added example rebuild if any of the headers change (#307)
• Simplified header includes in examples (#312)
• Fixed shrinklat example failure due to wrongly sized key (#319)
• Suppressed BTF warning in the shrinklat example due to type mismatch (#327)
• Fixed biolatency kernel version check after an upstream LTS backport (#309)

Build changes:

• Bumped Go to 1.20 and dependencies to latest (#249, #258, #281, #282, #283, #289, #317, #333, #334)
• Added build-dynamic and build-static make goals (#241)
• Expanded linting from golangci-lint and fixed uncovered issues (#256, #259, #269, #270)
• Added configuration loading checks for existing configs to CI (#322, #326)
• Added export of built examples in CI jobs to attach them to releases (#308, #325)
• Suppressed errors when building outside of a git repo (#242)
• Added checks for libbpf version on startup to prevent runtime errors (#247)
• Clarified libbpf instructions (#262)
• Started running tests with -race if available (#267)
• Added checks that produced binaries work in CI (#268)
• Switched from dbhi/qus/action to more official docker/setup-qemu-action for CI builds (#272)
• Split Docker image into multiple variants: ebpf_exporter and ebpf_exporter_with_examples (#273)
• Optimized libbpf dependencies in CI (#275)
• Added clang-format output diff to CI failures (#328)

Other changes:

• Styling and typo fixes (#252, #276, #329)
• Added map value size validation to startup config checks (#257, #321, #322)
• Added linguist ignores for vmlinux.h files that were screwing language stats (#248)
• Added .dockerignore for libbpf and built examples (#298)
• Removed unused perf_event from config definitions (#315)
• Added support for external BTF information (#320, #323)
• Added a uprobe benchmark (it's slow!) (#331)