set failover connector to alpha (#32216)

**Description:** <Describe what has changed.>
<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->

This PR adds the failover connector to the contrib distro and moves the
component to alpha state as all MVP functionality has been put in place.
This PR also adds a bug fix that caused the pipeline selector to
continue switching between the stable and stable + 1 index after a new
stable index has been established.

**Link to tracking Issue:** <Issue number if applicable>

Resolves #32094

**Testing:** <Describe what testing was performed and which tests were
added.>

Additional test case added to check current index after stable check

.chloggen/failover-alpha.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: failoverconnector
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: This change puts the failoverconnector into alpha
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [20766]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

cmd/otelcontribcol/builder-config.yaml

@@ -212,6 +212,7 @@ connectors:
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/connector/countconnector v0.98.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/connector/datadogconnector v0.98.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/connector/exceptionsconnector v0.98.0
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/connector/failoverconnector v0.98.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/connector/grafanacloudconnector v0.98.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/connector/routingconnector v0.98.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/connector/servicegraphconnector v0.98.0
@@ -429,6 +430,7 @@ replaces:
   - github.com/open-telemetry/opentelemetry-collector-contrib/connector/countconnector => ../../connector/countconnector
   - github.com/open-telemetry/opentelemetry-collector-contrib/connector/datadogconnector => ../../connector/datadogconnector
   - github.com/open-telemetry/opentelemetry-collector-contrib/connector/exceptionsconnector => ../../connector/exceptionsconnector
+  - github.com/open-telemetry/opentelemetry-collector-contrib/connector/failoverconnector => ../../connector/failoverconnector
   - github.com/open-telemetry/opentelemetry-collector-contrib/connector/grafanacloudconnector => ../../connector/grafanacloudconnector
   - github.com/open-telemetry/opentelemetry-collector-contrib/connector/routingconnector => ../../connector/routingconnector
   - github.com/open-telemetry/opentelemetry-collector-contrib/connector/servicegraphconnector => ../../connector/servicegraphconnector

cmd/otelcontribcol/go.mod

@@ -10,6 +10,7 @@ require (
 	github.com/open-telemetry/opentelemetry-collector-contrib/connector/countconnector v0.98.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/connector/datadogconnector v0.98.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/connector/exceptionsconnector v0.98.0
+	github.com/open-telemetry/opentelemetry-collector-contrib/connector/failoverconnector v0.98.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/connector/grafanacloudconnector v0.98.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/connector/routingconnector v0.98.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/connector/servicegraphconnector v0.98.0
@@ -1156,6 +1157,8 @@ replace github.com/open-telemetry/opentelemetry-collector-contrib/connector/data
 
 replace github.com/open-telemetry/opentelemetry-collector-contrib/connector/exceptionsconnector => ../../connector/exceptionsconnector
 
+replace github.com/open-telemetry/opentelemetry-collector-contrib/connector/failoverconnector => ../../connector/failoverconnector
+
 replace github.com/open-telemetry/opentelemetry-collector-contrib/connector/grafanacloudconnector => ../../connector/grafanacloudconnector
 
 replace github.com/open-telemetry/opentelemetry-collector-contrib/connector/routingconnector => ../../connector/routingconnector

connector/failoverconnector/README.md

@@ -3,19 +3,20 @@
 <!-- status autogenerated section -->
 | Status        |           |
 | ------------- |-----------|
-| Distributions | [] |
+| Distributions | [contrib] |
 | Issues        | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Aconnector%2Ffailover%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Aconnector%2Ffailover) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Aconnector%2Ffailover%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Aconnector%2Ffailover) |
 | [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@akats7](https://www.github.com/akats7), [@djaglowski](https://www.github.com/djaglowski), [@fatsheep9146](https://www.github.com/fatsheep9146) |
 
-[development]: https://github.com/open-telemetry/opentelemetry-collector#development
+[alpha]: https://github.com/open-telemetry/opentelemetry-collector#alpha
+[contrib]: https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol-contrib
 
 ## Supported Pipeline Types
 
 | [Exporter Pipeline Type] | [Receiver Pipeline Type] | [Stability Level] |
 | ------------------------ | ------------------------ | ----------------- |
-| metrics | metrics | [development] |
-| traces | traces | [development] |
-| logs | logs | [development] |
+| traces | traces | [alpha] |
+| metrics | metrics | [alpha] |
+| logs | logs | [alpha] |
 
 [Exporter Pipeline Type]: https://github.com/open-telemetry/opentelemetry-collector/blob/main/connector/README.md#exporter-pipeline-type
 [Receiver Pipeline Type]: https://github.com/open-telemetry/opentelemetry-collector/blob/main/connector/README.md#receiver-pipeline-type

connector/failoverconnector/metadata.yaml

@@ -4,11 +4,11 @@ scope_name: otelcol/failover
 status:
   class: connector
   stability:
-    development: [metrics_to_metrics, traces_to_traces, logs_to_logs]
-  distributions: []
+    alpha: [traces_to_traces, metrics_to_metrics, logs_to_logs]
+  distributions: [contrib]
   codeowners:
     active: [akats7, djaglowski, fatsheep9146]
 
 tests:
-    skip_lifecycle: true
-    skip_shutdown: true
+  skip_lifecycle: true
+  skip_shutdown: true

reports/distributions/contrib.yaml

@@ -6,6 +6,7 @@ components:
         - count
         - datadog
         - exceptions
+        - failover
         - grafanacloud
         - routing
         - servicegraph