Prometheus Integration general availability

.editorconfig

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+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+tab_width = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.go]
+indent_style = tab

.gitignore

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+.DS_Store
+.idea
+*.log
+tmp/
+vendor/*/
+!vendor/github.com/
+vendor/github.com/*/
+!vendor/github.com/newrelic/
+vendor/github.com/newrelic/*/
+!vendor/github.com/newrelic/go-telemetry-sdk/
+bin/
+deploy/local*.yaml

.golangci.yml

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+linters:
+  enable:
+    - govet
+    - golint
+    - goimports
+    - unused
+    - goconst
+    - errcheck
+  enable-all: false
+  disable-all: true
+  fast: false
+
+# all available settings of specific linters
+linters-settings:
+  golint:
+    # minimal confidence for issues, default is 0.8
+    min-confidence: 0.3
+
+issues:
+  exclude-use-default: false
+
+misspell:
+    locale: US
+
+lll:
+  line-length: 100

CHANGELOG.md

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+# Change Log
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## Unreleased
+
+### Added
+- Reconnect support when resource watcher connection is dropped.
+
+### Changed
+- Fix and refactor self describing metrics
+- Fix how the scrape interval is respected. 
+
+## 0.10.3
+### Added
+- Decorate samples with `k8s.cluster.name`.
+
+### Fixed
+- Logic for target discovery was adding nodes even when they were not labelled and required a label to be scraped.
+- The `SCRAPE_DURATION` time is respected even when the scrape cycle might finish earlier.
+
+## 0.10.2
+### Added
+- Support for scraping static targets using (mutual) TLS authentication.
+
+### Changed
+- By default do not skip the TLS verification.
+- Revamp of the static target configuration:
+    - `endpoints` key renamed to `targets`. If you had endpoints configured before, you need to update your 
+       configuration and restart the scraper.
+    - Each item in target can contain one or many urls in the `urls` key. This key is always a list.
+    - Each target hosts its own TLS configuration in the `tls_config` key.
+    - The TLS configuration contains 3 keys: `ca_file_path`, `cert_file_path` and `key_file_path`
+- Rename rules are executed at the end of the transformations pipeline. Now Copy attributes
+rules are being executed before it, so the name of metrics being used for matching the source and 
+the dest match with the original scraped instead of the renamed one.  
+
+### Removed
+- Static targets cannot be configured via environment variables anymore, as it requires a complex structure now. See
+  the _Changed_ section for more information.
+
+## 0.10.1
+### Fixed
+- The Telemetry Emitter now correctly handles counter metrics.
+
+## 0.10.0 - 2019-07-02
+### Added
+- Integration benchmark
+- `scrape_duration` configuration option to specify the length in time to distribute the
+  scraping from the endpoints.
+- Ignore rule accepts now exceptions.
+
+### Changed
+- Delta calculator memory optimization
+- Avoid growing slices when converting from Prometheus metrics 
+  to our internal DTO by setting the final capacity. This reduces memory allocs.
+- Optimized Target Metadata generation
+- Distributed targets fetching on time, to avoid memory peaks and big heaps.
+- Putting processing rules in contiguous memory to decrease the working set of
+  the process.
+- Emitters are now responsible for any delta calculation.
+- The default emitter now is the Go Telemetry SDK.
+
+### Removed
+- Unused `RawMetrics` field from `TargetMetrics` data structure.
+
+## 0.9.0 - 2019-06-12
+### Added
+- Transformation rule to add static attributes, i.e. a cluster name, through the configuration.
+- Default attributes to decorate the metrics with: `clusterName`, `integrationVersion` and `integrationName`. 
+- Mount pprof http endpoints when running in debug mode.
+- `targetName` attribute added to the metrics when converting from Prometheus metrics.
+- Integration benchmark
+
+### Changed
+- Now convert Prometheus metric types to our own types in the fetchers.
+- Emitters now receive `Metric`s instead of `Observation`s to avoid coupling with the format of especific emitters.
+- Convert Prometheus `counter`s into New Relic `count`s
+- Adapter the fetcher to use the worker concurrency pattern instead of starting blocked go routines.
+
+### Removed
+- `nrMetricName` and `nrMetricType` aren't added as metric attributes anymore. This is done by the Metric API.
+- `metadata` field removed from the `Metric` type.
+- `labels` field removed from the `Target` type.
+- The parallel emitter has been removed.
+
+### Fixed
+- Now listing pods when looking for targets.
+- The Kubernetes target retriever now removes targets if their scrape label is removed or not `true` anymore.
+
+## 0.8.2 - 2019-04-17
+### Fixed
+- StartTimeMs is now generated correctly.
+
+## 0.8.1 - 2019-04-16
+### Fixed
+- StartTimeMs values are correctly sent as milliseconds.
+- Update the Kubernetes retriever to continue watching the objects when there is
+  an error listing them.
+
+## 0.8.0 - 2019-03-04
+### Changed
+- Transformations config format
+- Internal refactoring
+
+## 0.7.0 - 2019-02-25
+### Added
+- Add support for reading config options from a configuration file
+- Read processing rules from the config file
+
+### Changed
+- Rename URL config option and its default value
+- Modify docker images to don't use the root user
+
+## 0.6.0 - 2019-02-22
+### Changed
+- Added more rename attributes for known exporters
+
+## 0.5.0 - 2019-02-22
+### Changed
+- Prefix metric attributes that are coming from K8s object labels
+
+### Removed
+- Removed "entityName" attribute from all the metrics
+
+
+## 0.4.0 - 2019-02-22
+### Added
+- Log error when a request to the metric API is not successful
+- Support for K8s clusters using RBAC
+
+### Changed
+- Rename the attribute with info about the scraped endpoint
+
+## 0.3.0 - 2019-02-20
+### Added
+- Decorate metrics from K8s targets with K8s context attributes
+- Add option to decorate metrics automatically
+
+### Changed
+- Ignore unsupported metric type
+- Send Prometheus untyped metrics as gauges
+- Renamed the integration
+
+## 0.2.0 - 2019-02-20
+### Added
+- Emitters: "api" and "stdout"
+- Configurable list of static endpoints
+- Integration metrics
+
+### Changed
+- Refactor: Decoupled data processing pipeline
+- v0.3.0 metrics format
+- Watch Kubernetes objects
+
+### Removed
+- New Relic Infrastructure Agent dependency
+
+## 0.1.0 - 2019-02-13
+### Added
+- Initial version

CODE_OF_CONDUCT.md

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+# CONTRIBUTOR COVENANT CODE OF CONDUCT
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age,
+body size, disability, ethnicity, sex characteristics, gender identity and
+expression, level of experience, education, socio-economic status, nationality,
+personal appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+- Using welcoming and inclusive language
+- Being respectful of differing viewpoints and experiences
+- Gracefully accepting constructive criticism
+- Focusing on what is best for the community
+- Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+- The use of sexualized language or imagery and unwelcome sexual attention or
+  advances
+- Trolling, insulting/derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others’ private information, such as a physical or electronic
+  address, without explicit permission
+- Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies within all project spaces, and it also applies
+when an individual is representing the project or its community in public
+spaces. Examples of representing a project or community include using an
+official project e-mail address, posting via an official social media account,
+or acting as an appointed representative at an online or offline event.
+Representation of a project may be further defined and clarified by project
+maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at [email protected]. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an
+incident. Further details of specific enforcement policies may be posted
+separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project’s leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the Contributor Covenant, version 1.4,
+available at
+https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
+
+For answers to common questions about this code of conduct, see
+https://www.contributor-covenant.org/faq