Fix Target Allocator builds by using versions.txt (open-telemetry#1140)

* Rerun target allocator publish step

* Docs which will trigger a publish

* update release docs

* update on new version

.github/workflows/publish-target-allocator.yaml

@@ -7,6 +7,8 @@ on:
       - '.github/workflows/publish-target-allocator.yaml'
     branches:
       - main
+    tags:
+      - 'v*'
   workflow_dispatch:
 
 jobs:
@@ -17,7 +19,7 @@ jobs:
       - uses: actions/checkout@v3
 
       - name: Read version
-        run: echo "VERSION=$(cat cmd/otel-allocator/version.txt)" >> $GITHUB_ENV
+        run: grep -v '\#' versions.txt | grep targetallocator | awk -F= '{print "VERSION="$2}' >> $GITHUB_ENV
 
       - name: Docker meta
         id: meta

RELEASE.md

@@ -2,7 +2,7 @@
 
 Steps to release a new version of the OpenTelemetry Operator:
 
-1. Change the `versions.txt`, so that it lists the target version of the OpenTelemetry Collector (operand), and the desired version for the operator. The `major.minor` should typically match, with the patch portion being possibly different.
+1. Change the `versions.txt`, so that it lists the target version of the OpenTelemetry Collector (operand), and the desired version for the target allocator and the operator. The `major.minor` should typically match, with the patch portion being possibly different.
 1. Run `make bundle USER=open-telemetry VERSION=0.38.0`, using the version that will be released.
 1. Change the compatibility matrix in the readme file, using the OpenTelemetry Operator version to be released and the current latest Kubernetes version as the latest supported version, with N-2 being the lower bound. Make sure that the CI is currently testing the latest Kubernetes version!
 1. Add the changes to the changelog

cmd/otel-allocator/README.md

@@ -1,7 +1,8 @@
 # Target Allocator
 
 The TargetAllocator is an optional separately deployed component of an OpenTelemetry Collector setup, which is used to
-distribute targets of the PrometheusReceiver on all deployed Collector instances.
+distribute targets of the PrometheusReceiver on all deployed Collector instances. The release version matches the
+operator's most recent release as well.
 
 # Design
 

versions.txt

@@ -8,7 +8,7 @@ opentelemetry-collector=0.60.0
 operator=0.60.0
 
 # Represents the current release of the Target Allocator.
-targetallocator=0.1.0
+targetallocator=0.60.0
 
 # Represents the current release of Java instrumentation.
 # Should match autoinstrumentation/java/version.txt