Py-node-exporter

* [BUGFIX] Handle errors from disabled PSI subsystem 1983
* [BUGFIX] Sanitize strings from /sys/class/power_supply 1984
* [BUGFIX] Silence missing netclass errors 1986

* [BUGFIX] Fix ineffassign issue 1957
* [BUGFIX] Fix some noisy log lines 1962

NOTE: We have improved some of the flag naming conventions (PR 1743). The old names are
deprecated and will be removed in 2.0. They will continue to work for backwards
compatibility.

* [CHANGE] Improve filter flag names 1743
* [CHANGE] Add btrfs and powersupplyclass to list of exporters enabled by default 1897
* [FEATURE] Add fibre channel collector 1786
* [FEATURE] Expose cpu bugs and flags as info metrics. 1788
* [FEATURE] Add network_route collector 1811
* [FEATURE] Add zoneinfo collector 1922
* [ENHANCEMENT] Add more InfiniBand counters 1694
* [ENHANCEMENT] Add flag to aggr ipvs metrics to avoid high cardinality metrics 1709
* [ENHANCEMENT] Adding backlog/current queue length to qdisc collector 1732
* [ENHANCEMENT] Include TCP OutRsts in netstat metrics 1733
* [ENHANCEMENT] Add pool size to entropy collector 1753
* [ENHANCEMENT] Remove CGO dependencies for OpenBSD amd64 1774
* [ENHANCEMENT] bcache: add writeback_rate_debug stats 1658
* [ENHANCEMENT] Add check state for mdadm arrays via node_md_state metric 1810
* [ENHANCEMENT] Expose XFS inode statistics 1870
* [ENHANCEMENT] Expose zfs zpool state 1878
* [ENHANCEMENT] Added an ability to pass collector.supervisord.url via SUPERVISORD_URL environment variable 1947
* [BUGFIX] filesystem_freebsd: Fix label values 1728
* [BUGFIX] Fix various procfs parsing errors 1735
* [BUGFIX] Handle no data from powersupplyclass 1747
* [BUGFIX] udp_queues_linux.go: change upd to udp in two error strings 1769
* [BUGFIX] Fix node_scrape_collector_success behaviour 1816
* [BUGFIX] Fix NodeRAIDDegraded to not use a string rule expressions 1827
* [BUGFIX] Fix node_md_disks state label from fail to failed 1862
* [BUGFIX] Handle EPERM for syscall in timex collector 1938
* [BUGFIX] bcache: fix typo in a metric name 1943
* [BUGFIX] Fix XFS read/write stats (https://github.com/prometheus/procfs/pull/343)

* [BUGFIX] filesystem_freebsd: Fix label values 1728
* [BUGFIX] Update prometheus/procfs to fix log noise 1735
* [BUGFIX] Fix build tags for collectors 1745
* [BUGFIX] Handle no data from powersupplyclass 1747, 1749

**Breaking changes**

* The netdev collector CLI argument `--collector.netdev.ignored-devices` was renamed to `--collector.netdev.device-blacklist` in order to conform with the systemd collector. 1279
* The label named `state` on `node_systemd_service_restart_total` metrics was changed to `name` to better describe the metric. 1393
* Refactoring of the mdadm collector changes several metrics
- `node_md_disks_active` is removed
- `node_md_disks` now has a `state` label for "failed", "spare", "active" disks.
- `node_md_is_active` is replaced by `node_md_state` with a state set of "active", "inactive", "recovering", "resync".
* Additional label `mountaddr` added to NFS device metrics to distinguish mounts from the same URL, but different IP addresses. 1417
* Metrics node_cpu_scaling_frequency_min_hrts and node_cpu_scaling_frequency_max_hrts of the cpufreq collector were renamed to node_cpu_scaling_frequency_min_hertz and node_cpu_scaling_frequency_max_hertz. 1510
* Collectors that are enabled, but are unable to find data to collect, now return 0 for `node_scrape_collector_success`.

Changes

* [CHANGE] Add `--collector.netdev.device-whitelist`. 1279
* [CHANGE] Ignore iso9600 filesystem on Linux 1355
* [CHANGE] Refactor mdadm collector 1403
* [CHANGE] Add `mountaddr` label to NFS metrics. 1417
* [CHANGE] Don't count empty collectors as success. 1613
* [FEATURE] New flag to disable default collectors 1276
* [FEATURE] Add experimental TLS support 1277, 1687, 1695
* [FEATURE] Add collector for Power Supply Class 1280
* [FEATURE] Add new schedstat collector 1389
* [FEATURE] Add FreeBSD zfs support 1394
* [FEATURE] Add uname support for Darwin and OpenBSD 1433
* [FEATURE] Add new metric node_cpu_info 1489
* [FEATURE] Add new thermal_zone collector 1425
* [FEATURE] Add new cooling_device metrics to thermal zone collector 1445
* [FEATURE] Add swap usage on darwin 1508
* [FEATURE] Add Btrfs collector 1512
* [FEATURE] Add RAPL collector 1523
* [FEATURE] Add new softnet collector 1576
* [FEATURE] Add new udp_queues collector 1503
* [FEATURE] Add basic authentication 1673
* [ENHANCEMENT] Log pid when there is a problem reading the process stats 1341
* [ENHANCEMENT] Collect InfiniBand port state and physical state 1357
* [ENHANCEMENT] Include additional XFS runtime statistics. 1423
* [ENHANCEMENT] Report non-fatal collection errors in the exporter metric. 1439
* [ENHANCEMENT] Expose IPVS firewall mark as a label 1455
* [ENHANCEMENT] Add check for systemd version before attempting to query certain metrics. 1413
* [ENHANCEMENT] Add a flag to adjust mount timeout 1486
* [ENHANCEMENT] Add new counters for flush requests in Linux 5.5 1548
* [ENHANCEMENT] Add metrics and tests for UDP receive and send buffer errors 1534
* [ENHANCEMENT] The sockstat collector now exposes IPv6 statistics in addition to the existing IPv4 support. 1552
* [ENHANCEMENT] Add infiniband info metric 1563
* [ENHANCEMENT] Add unix socket support for supervisord collector 1592
* [ENHANCEMENT] Implement loadavg on all BSDs without cgo 1584
* [ENHANCEMENT] Add model_name and stepping to node_cpu_info metric 1617
* [ENHANCEMENT] Add `--collector.perf.cpus` to allow setting the CPU list for perf stats. 1561
* [ENHANCEMENT] Add metrics for IO errors and retires on Darwin. 1636
* [ENHANCEMENT] Add perf tracepoint collection flag 1664
* [ENHANCEMENT] ZFS: read contents of objset file 1632
* [ENHANCEMENT] Linux CPU: Cache CPU metrics to make them monotonically increasing 1711
* [BUGFIX] Read /proc/net files with a single read syscall 1380
* [BUGFIX] Renamed label `state` to `name` on `node_systemd_service_restart_total`. 1393
* [BUGFIX] Fix netdev nil reference on Darwin 1414
* [BUGFIX] Strip path.rootfs from mountpoint labels 1421
* [BUGFIX] Fix seconds reported by schedstat 1426
* [BUGFIX] Fix empty string in path.rootfs 1464
* [BUGFIX] Fix typo in cpufreq metric names 1510
* [BUGFIX] Read /proc/stat in one syscall 1538
* [BUGFIX] Fix OpenBSD cache memory information 1542
* [BUGFIX] Refactor textfile collector to avoid looping defer 1549
* [BUGFIX] Fix network speed math 1580
* [BUGFIX] collector/systemd: use regexp to extract systemd version 1647
* [BUGFIX] Fix initialization in perf collector when using multiple CPUs 1665
* [BUGFIX] Fix accidentally empty lines in meminfo_linux 1671

Changes
* [BUGFIX] Fix incorrect sysctl call in BSD meminfo collector, resulting in broken swap metrics on FreeBSD 1345
* [BUGFIX] Fix rollover bug in mountstats collector 1364