2.3.0 / 2018-06-07

• [CHANGE] marathon_sd: use auth_token and auth_token_file for token-based authentication instead of bearer_token and bearer_token_file respectively.
• [CHANGE] Metric names for HTTP server metrics changed
• [FEATURE] Add query commands to promtool
• [FEATURE] Add security headers to HTTP server responses
• [FEATURE] Pass query hints via remote read API
• [FEATURE] Basic auth passwords can now be configured via file across all configuration
• [ENHANCEMENT] Optimise PromQL and API serialization for memory usage and allocations
• [ENHANCEMENT] Limit number of dropped targets in web UI
• [ENHANCEMENT] Consul and EC2 service discovery allow using server-side filtering for performance improvement
• [ENHANCEMENT] Add advanced filtering configuration to EC2 service discovery
• [ENHANCEMENT] marathon_sd: adds support for basic and bearer authentication, plus all other common HTTP client options (TLS config, proxy URL, etc.)
• [ENHANCEMENT] Provide machine type metadata and labels in GCE service discovery
• [ENHANCEMENT] Add pod controller kind and name to Kubernetes service discovery data
• [ENHANCEMENT] Move TSDB to flock-based log file that works with Docker containers
• [BUGFIX] Properly propagate storage errors in PromQL
• [BUGFIX] Fix path prefix for web pages
• [BUGFIX] Fix goroutine leak in Consul service discovery
• [BUGFIX] Fix races in scrape manager
• [BUGFIX] Fix OOM for very large k in PromQL topk() queries
• [BUGFIX] Make remote write more resilient to unavailable receivers
• [BUGFIX] Make remote write shutdown cleanly
• [BUGFIX] Don't leak files on errors in TSDB's tombstone cleanup
• [BUGFIX] Unary minus expressions now removes the metric name from results
• [BUGFIX] Fix bug that lead to wrong amount of samples considered for time range expressions