• [FEATURE] Support more specific prefixes in ?collect parameter #387
• [FEATURE] Enabling monitoring metrics, aggregate deltas, and descriptor cache with ?collect #389

Deprecation notice: The comma delimited flags google.project-id and monitoring.metrics-type-prefixes are being replaced by repeatable flags google.project-ids and monitoring.metrics-prefixes. The comma delimited flags will be supported for at least one more release.

• [CHANGE] Migrate logging to promslog #378
• [ENHANCEMENT] Sanitize metric type prefixes to prevent duplicate metrics #319
• [ENHANCEMENT] Add project ID to all logs from the collector #362
• [FEATURE] Add support for specifying comma-delimited string flags as repeatable flags #355

• [FEATURE] Add ErrorLogger for promhttp #277
• [ENHANCEMENT] Add more info about filters to docs and rename struct fields #198

• [BUGFIX] Fix histogram merge #324

• [FEATURE] Add projects query #243
• [ENHANCEMENT] Refactor delta logic for library usage #190

• [BUGFIX] Fix default listening port #229

• [FEATURE] cache descriptors to reduce API calls #218

• [FEATURE] Add monitoring.aggregate-deltas and monitoring.aggregate-deltas-ttl flags which allow aggregating DELTA
  metrics as counters instead of a gauge #168
• [FEATURE] Add web.stackdriver-telemetry-path flag. When configured the stackdriver metrics go to this endpoint and
  web.telemetry-path contain just the runtime metrics. #173
• [ENHANCEMENT] Make Stackdriver main collector more library-friendly #157
• [BUGFIX] Fixes suspected duplicate label panic for some GCP metric #153
• [BUGFIX] Metrics-ingest-delay bugfix #151
• [BUGFIX] Fix data race on metricDescriptorsFunction start and end times #158

Breaking Changes:

The exporter nolonger supports configuration via ENV vars. This was a non-standard feature that is not part of the Prometheus ecossystem. All configuration is now handled by the existing command line arguments.

• [CHANGE] Cleanup non-standard ENV var setup #142
• [FEATURE] Add support to include ingest delay when pull metrics #129
• [FEATURE] Add monitoring.filters flag #133
• [ENHANCEMENT] Setup exporter metrics only once when we can #124

• [CHANGE] Do not treat failure to collect metrics as fatal #102
• [FEATURE] Add support for multiple google project IDs #105