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
The Markdown files were all originally named "$x/_index.md"; I renamed
them as follows:
```
for x in `ls ~/conduit-site/conduit.io/content`; do
cp ~/conduit-site/conduit.io/content/$x/_index.md doc/$x.md
done
mv doc/doc.md doc/overview.md
```
When we publish the files on conduit.io we need to do the inverse
transformation to avoid breaking existing links.
The images were embedded using a syntax GitHub doesn't support. Also, the
images were not originally in a subdirectory of docs/.
Use normal Markdown syntax for image embedding, and reference the docs
using relative links to the images/ subdirectory. This way they will show
up in the GitHub UI. When we publish the docs on conduit.io we'll need to
figure out how to deal with this change.
I took the liberty of renaming data-plane.png to dashboard-data-plane.png to
clarify it a bit.
There is no other roadmap so there's no need to qualify this one as
"public." Before it was made public we marked it "public" to emphasize
that it would become public, but that isn't needed now.
Signed-off-by: Brian Smith <brian@briansmith.org>
Andrew Seigner
Oliver Gould
Brian Smith