[new-component] Operator OpAMP Bridge Service (open-telemetry#1339)

* Begin the journey

* Some hacks to functionality

* Fix create bug, getting prepped for refactor

* Some reorganization and cleaning, added tests

* Add deletion and dockerfile

* Add logic for specifying allowed components

* Linting, CI, header

* Makefile CI

* Added comments, created an object for use by the applied keys map

* Fix makefile, update to use require

* IMports

* updated from comments

* Improved logging, working dockerfile

* Rename the whole thing

* Change service name

* Update from feedback

.chloggen/1318-remote-config-service.yaml

@@ -0,0 +1,16 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: new_component
+
+# The name of the component, or a single word describing the area of concern, (e.g. operator, target allocator, github action)
+component: Operator OpAMP Bridge
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Introducing the Operator OpAMP Bridge service, which allows a user to manage OpenTelemetry Collector CRDs via OpAMP
+
+# One or more tracking issues related to the change
+issues: [1318]
+
+# (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:

.github/workflows/continuous-integration.yaml

@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        workdir: [".", "./cmd/otel-allocator"]
+        workdir: [".", "./cmd/otel-allocator", "./cmd/operator-opamp-bridge"]
     steps:
     - name: Set up Go
       uses: actions/setup-go@v3

.gitignore

@@ -7,6 +7,7 @@
 *.dylib
 bin
 vendor
+.DS_Store
 
 # Test binary, build with `go test -c`
 *.test

Makefile

@@ -21,6 +21,9 @@ BUNDLE_IMG ?= ${IMG_PREFIX}/${IMG_REPO}-bundle:${VERSION}
 TARGETALLOCATOR_IMG_REPO ?= target-allocator
 TARGETALLOCATOR_IMG ?= ${IMG_PREFIX}/${TARGETALLOCATOR_IMG_REPO}:$(addprefix v,${VERSION})
 
+OPERATOROPAMPBRIDGE_IMG_REPO ?= operator-opamp-bridge
+OPERATOROPAMPBRIDGE_IMG ?= ${IMG_PREFIX}/${OPERATOROPAMPBRIDGE_IMG_REPO}:$(addprefix v,${VERSION})
+
 # Options for 'bundle-build'
 ifneq ($(origin CHANNELS), undefined)
 BUNDLE_CHANNELS := --channels=$(CHANNELS)
@@ -89,6 +92,7 @@ ci: test
 test: generate fmt vet ensure-generate-is-noop envtest
 	KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(KUBE_VERSION) -p path)" go test ${GOTEST_OPTS} ./...
 	cd cmd/otel-allocator && KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(KUBE_VERSION) -p path)" go test ${GOTEST_OPTS} ./...
+	cd cmd/operator-opamp-bridge && KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(KUBE_VERSION) -p path)" go test ${GOTEST_OPTS} ./...
 
 # Build manager binary
 .PHONY: manager
@@ -152,6 +156,7 @@ vet:
 lint:
 	golangci-lint run
 	cd cmd/otel-allocator && golangci-lint run
+	cd cmd/operator-opamp-bridge && golangci-lint run
 
 # Generate code
 .PHONY: generate
@@ -174,7 +179,7 @@ e2e-log-operator:
 	kubectl get deploy -A
 
 .PHONY: prepare-e2e
-prepare-e2e: kuttl set-image-controller container container-target-allocator start-kind cert-manager install-metrics-server install-openshift-routes load-image-all deploy
+prepare-e2e: kuttl set-image-controller container container-target-allocator container-operator-opamp-bridge start-kind cert-manager install-metrics-server install-openshift-routes load-image-all deploy
 	TARGETALLOCATOR_IMG=$(TARGETALLOCATOR_IMG) ./hack/modify-test-images.sh
 
 .PHONY: scorecard-tests
@@ -201,6 +206,10 @@ container-target-allocator-push:
 container-target-allocator:
 	docker buildx build  --load --platform linux/${ARCH} -t ${TARGETALLOCATOR_IMG} cmd/otel-allocator
 
+.PHONY: container-operator-opamp-bridge
+container-operator-opamp-bridge:
+	docker buildx build --platform linux/${ARCH} -t ${OPERATOROPAMPBRIDGE_IMG} cmd/operator-opamp-bridge
+
 .PHONY: start-kind
 start-kind:
 ifeq (true,$(START_KIND_CLUSTER))
@@ -216,7 +225,7 @@ install-openshift-routes:
 	./hack/install-openshift-routes.sh
 
 .PHONY: load-image-all
-load-image-all: load-image-operator load-image-target-allocator
+load-image-all: load-image-operator load-image-target-allocator load-image-operator-opamp-bridge
 
 .PHONY: load-image-operator
 load-image-operator: container
@@ -236,6 +245,10 @@ else
 endif
 
 
+.PHONY: load-image-operator-opamp-bridge
+load-image-operator-opamp-bridge:
+	kind load docker-image ${OPERATOROPAMPBRIDGE_IMG}
+
 .PHONY: cert-manager
 cert-manager: cmctl
 	# Consider using cmctl to install the cert-manager once install command is not experimental

cmd/operator-opamp-bridge/Dockerfile

@@ -0,0 +1,29 @@
+# Build the operator-opamp-bridge binary
+FROM golang:1.19-alpine as builder
+
+WORKDIR /app
+
+RUN apk --no-cache add ca-certificates
+
+# Copy go mod and sum files
+COPY go.mod go.sum ./
+
+RUN go mod download
+
+COPY . .
+
+# Build the Go app
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .
+
+######## Start a new stage from scratch #######
+FROM scratch
+
+WORKDIR /root/
+
+# Copy the certs from the builder
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+
+# Copy the pre-built binary file from the previous stage
+COPY --from=builder /app/main .
+
+ENTRYPOINT ["./main"]