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v0.4.0 (#772)
Conduit 0.4.0 overhauls Conduit's telemetry system and improves service discovery reliability. * Web UI * **New** automatically-configured Grafana dashboards for all Deployments. * Command-line interface * `conduit stat` has been completely rewritten to accept arguments like `kubectl get`. The `--to` and `--from` filters can be used to filter traffic by destination and source, respectively. `conduit stat` currently can operate on `Namespace` and `Deployment` Kubernetes resources. More resource types will be added in the next release! * Proxy (data plane) * **New** Prometheus-formatted metrics are now exposed on `:4191/metrics`, including rich destination labeling for outbound HTTP requests. The proxy no longer pushes metrics to the control plane. * The proxy now handles `SIGINT` or `SIGTERM`, gracefully draining requests until all are complete or `SIGQUIT` is received. * SMTP and MySQL (ports 25 and 3306) are now treated as opaque TCP by default. You should no longer have to specify `--skip-outbound-ports` to communicate with such services. * When the proxy reconnected to the controller, it could continue to send requests to old endpoints. Now, when the proxy reconnects to the controller, it properly removes invalid endpoints. * A bug impacting some HTTP/2 reset scenarios has been fixed. * Service Discovery * Previously, the proxy failed to resolve some domain names that could be misinterpreted as a Kubernetes Service name. This has been fixed by extending the _Destination_ API with a negative acknowledgement response. * Control Plane * The _Telemetry_ service and associated APIs have been removed. * Documentation * Updated Roadmap * Added prometheus metrics guide
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‎CHANGES.md

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## v0.4.0
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Conduit 0.4.0 overhauls Conduit's telemetry system and improves service discovery
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reliability.
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* Web UI
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* **New** automatically-configured Grafana dashboards for all Deployments.
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* Command-line interface
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* `conduit stat` has been completely rewritten to accept arguments like `kubectl get`.
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The `--to` and `--from` filters can be used to filter traffic by destination and
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source, respectively. `conduit stat` currently can operate on `Namespace` and
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`Deployment` Kubernetes resources. More resource types will be added in the next
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release!
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* Proxy (data plane)
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* **New** Prometheus-formatted metrics are now exposed on `:4191/metrics`, including
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rich destination labeling for outbound HTTP requests. The proxy no longer pushes
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metrics to the control plane.
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* The proxy now handles `SIGINT` or `SIGTERM`, gracefully draining requests until all
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are complete or `SIGQUIT` is received.
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* SMTP and MySQL (ports 25 and 3306) are now treated as opaque TCP by default. You
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should no longer have to specify `--skip-outbound-ports` to communicate with such
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services.
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* When the proxy reconnected to the controller, it could continue to send requests to
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old endpoints. Now, when the proxy reconnects to the controller, it properly removes
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invalid endpoints.
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* A bug impacting some HTTP/2 reset scenarios has been fixed.
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* Service Discovery
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* Previously, the proxy failed to resolve some domain names that could be misinterpreted
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as a Kubernetes Service name. This has been fixed by extending the _Destination_ API
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with a negative acknowledgement response.
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* Control Plane
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* The _Telemetry_ service and associated APIs have been removed.
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* Documentation
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* Updated [Roadmap](doc/roadmap.md)
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Special thanks to @ahume, @alenkacz, & @xiaods for contributing to this release!
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### Upgrading from v0.3.1
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When upgrading from v0.3.1, it's important to upgrade proxies before upgrading the
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controller. As you upgrade proxies, the controller will lose visibility into some data
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plane stats. Once all proxies are updated, `conduit install |kubectl apply -f -` can be
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run to upgrade the controller without causing any data plane disruptions. Once the
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controller has been restarted, traffic stats should become available.
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## v0.3.1
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Conduit 0.3.1 improves Conduit's resilience and transparency.

‎doc/get-involved.md

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There are several ways to get involved:
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- Conduit on [Github](https://github.com/runconduit/conduit)
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- Conduit on [GitHub](https://github.com/runconduit/conduit)
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- Join us on the #conduit channel in [Linkerd slack](https://slack.linkerd.io/)
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- Join the mailing lists
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- Users list: [[email protected]](https://groups.google.com/forum/#!forum/conduit-users)

‎doc/proxy-metrics.md

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### `response_total`
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A counter of the number of responses the proxy has received. This is
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incremeneted when the response stream ends.
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incremented when the response stream ends.
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### `response_duration_ms`
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‎doc/roadmap.md

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designations based on actual community usage, and generally will err on the side of being
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overly conservative.
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##### Status: alpha
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## [0.3: Telemetry Stability](https://github.com/runconduit/conduit/milestone/5)
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#### Late February 2018
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##### Status: alpha
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## [0.4.0: Rich, Kubernetes-aware Grafana & Prometheus](https://github.com/runconduit/conduit/milestone/6)
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#### 2018-04-16
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### Visibility
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- Stable, automatic top-line metrics for small-scale clusters.
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### Usability
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- Routing to external DNS names
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- Rich, Kubernetes-aware `conduit stat`:
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- Works on deployments & namespaces.
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- `--from` & `--to` flags filter stats by source & destination.
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- Proxy exposes Prometheus labeled with rich outbound stats.
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- Grafana dashboards for Kubernetes Deployments & Namespaces.
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### Reliability
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- Least-loaded L7 load balancing
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- Improved error handling
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- Improved egress support
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- The proxy properly routes egress traffic to arbitrary DNS names.
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### Development
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- Published (this) roadmap
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- All milestones, issues, PRs, & mailing lists made public
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## [0.4.1: Rich, Kubernetes-aware debugging](https://github.com/runconduit/conduit/milestone/10)
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#### Late April 2018
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## [0.4: Automatic TLS; Prometheus++](https://github.com/runconduit/conduit/milestone/6)
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### Visibility
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#### Late March 2018
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- `conduit stat` works on many Kubernetes resources.
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- Per-authority HTTP stats.
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- TCP-level stats
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- `conduit tap` works on many Kubernetes resources, too.
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- `conduit wtf`: what's the failure?
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### Usability
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- Helm integration
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- Mutating webhook admission controller
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## [0.5: Stable, private communication](https://github.com/runconduit/conduit/milestone/7)
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#### Mid-May 2018
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### Security
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- Automatically provide all meshed services with cryptographic identity
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- Automatically secure all meshed communication
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### Visibility
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- Enhanced server-side metrics, including per-path and per-status-code counts & latencies.
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- Client-side metrics to surface egress traffic, etc.
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- Latency-aware load balancing
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- Stable Service Discovery semantics.
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- Latency-aware load balancing.
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## [0.5: Controllable Deadlines/Timeouts](https://github.com/runconduit/conduit/milestone/7)
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#### Early April 2018
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## [0.6: Externally accessible](https://github.com/runconduit/conduit/milestone/8)
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#### Early June 2018
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### Reliability
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- Controllable latency objectives to configure timeouts
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- Controllable response classes to inform circuit breaking, retryability, & success rate calculation
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- High-availability controller
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### Visibility
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### Routing
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- OpenTracing integration
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- Kubernetes `Ingress` support
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### Security
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- Mutual authentication
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- Key rotation
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## [0.6: Controllable Response Classification & Retries](https://github.com/runconduit/conduit/milestone/8)
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#### Late April 2018
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- Explicitly configured TLS for ingress
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- Server Name Indication (SNI)
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### Reliability
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- Automatic alerting for latency & success objectives
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- Controllable retry policies
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### Routing
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- Scales to many cores.
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- High-availability controller
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- Circuit-breaking.
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- Rich ingress routing
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- Contextual route overrides
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### Usability
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### Security
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- Helm integration
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- Authorization policy
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## And Beyond:
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## And then...
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- Controller policy plugins
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- Support for non-Kubernetes services
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- Failure injection (aka "chaos chihuahua")
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- Mutual authentication
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- Key rotation
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- Let's Encrypt Ingress support
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- Automatic alerting for latency & success objectives
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- Controllable retry policies
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- OpenTracing integration
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- Pluggable authorization policy
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- Failure injection
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- Speculative retries
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- Dark traffic
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- gRPC payload-aware `tap`

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