Breaking changes

• Renamed interface label to device in netclass collector for consistency with other network metrics #1224
• The cpufreq metrics now separate the cpufreq and scaling data based on what the driver provides. #1248
• The labels for the network_up metric have changed, see issue #1236
• Bonding collector now uses mii_status instead of operstatus #1124
• Several systemd metrics have been turned off by default to improve performance #1254 These include unit_tasks_current, unit_tasks_max, service_restart_total, and unit_start_time_seconds
• The systemd collector blacklist now includes automount, device, mount, and slice units by default. #1255

Changes

• [CHANGE] Bonding state uses mii_status #1124
• [CHANGE] Add a limit to the number of in-flight requests #1166
• [CHANGE] Renamed interface label to device in netclass collector #1224
• [CHANGE] Add separate cpufreq and scaling metrics #1248
• [CHANGE] Several systemd metrics have been turned off by default to improve performance #1254
• [CHANGE] Expand systemd collector blacklist #1255
• [CHANGE] Split cpufreq metrics into a separate collector #1253
• [FEATURE] Add a flag to disable exporter metrics #1148
• [FEATURE] Add kstat-based Solaris metrics for boottime, cpu and zfs collectors #1197
• [FEATURE] Add uname collector for FreeBSD #1239
• [FEATURE] Add diskstats collector for OpenBSD #1250
• [FEATURE] Add pressure collector exposing pressure stall information for Linux #1174
• [FEATURE] Add perf exporter for Linux #1274
• [ENHANCEMENT] Add Infiniband counters #1120
• [ENHANCEMENT] Add TCPSynRetrans to netstat default filter #1143
• [ENHANCEMENT] Move network_up labels into new metric network_info #1236
• [ENHANCEMENT] Use 64-bit counters for Darwin netstat
• [BUGFIX] Add fallback for missing /proc/1/mounts #1172
• [BUGFIX] Fix node_textfile_mtime_seconds to work properly on symlinks #1326