Add embeddings to server behind env var (#50288)

This might be useful for some customers, but definitely will be useful
for us to write an E2E pipeline for embeddings.

cc @sourcegraph/dev-experience for a quick glance at the
debugserver/prometheus part of this.

## Test plan

Will build the image locally and see if it works alright with the env
var set.

cmd/server/shared/globals.go

@@ -19,6 +19,7 @@ var SrcProfServices = []map[string]string{
 	{"Name": "repo-updater", "Host": "127.0.0.1:6074"},
 	{"Name": "worker", "Host": "127.0.0.1:6089"},
 	{"Name": "precise-code-intel-worker", "Host": "127.0.0.1:6088"},
+	{"Name": "embeddings", "Host": "127.0.0.1:6099"},
 	// no executors in server image
 	{"Name": "zoekt-indexserver", "Host": "127.0.0.1:6072"},
 	{"Name": "zoekt-webserver", "Host": "127.0.0.1:3070", "DefaultPath": "/debug/requests/"},

dev/prometheus/all/prometheus_targets.yml

@@ -68,3 +68,8 @@
   targets:
     # opentelemetry collector
     - host.docker.internal:8888
+- labels:
+    job: embeddings
+  targets:
+    # embeddings
+    - host.docker.internal:6099

dev/prometheus/linux/prometheus_targets.yml

@@ -68,3 +68,8 @@
   targets:
     # opentelemetry collector
     - host.docker.internal:8888
+- labels:
+    job: embeddings
+  targets:
+    # embeddings
+    - 127.0.0.1:6099

dev/src-prof-services.json

@@ -11,6 +11,7 @@
   { "Name": "executor-batches", "Host": "127.0.0.1:6093" },
   { "Name": "zoekt-indexserver-0", "Host": "127.0.0.1:6072" },
   { "Name": "zoekt-indexserver-1", "Host": "127.0.0.1:6073" },
+  { "Name": "embeddings", "Host": "127.0.0.1:6099" },
   { "Name": "zoekt-webserver-0", "Host": "127.0.0.1:3070", "DefaultPath": "/debug/requests/" },
   { "Name": "zoekt-webserver-1", "Host": "127.0.0.1:3071", "DefaultPath": "/debug/requests/" }
 ]

enterprise/cmd/server/build.sh

@@ -13,4 +13,5 @@ export SERVER_PKG=${SERVER_PKG:-github.com/sourcegraph/sourcegraph/enterprise/cm
   github.com/sourcegraph/sourcegraph/enterprise/cmd/migrator \
   github.com/sourcegraph/sourcegraph/enterprise/cmd/repo-updater \
   github.com/sourcegraph/sourcegraph/enterprise/cmd/symbols \
-  github.com/sourcegraph/sourcegraph/enterprise/cmd/precise-code-intel-worker
+  github.com/sourcegraph/sourcegraph/enterprise/cmd/precise-code-intel-worker \
+  github.com/sourcegraph/sourcegraph/enterprise/cmd/embeddings

enterprise/cmd/server/main.go

@@ -24,5 +24,17 @@ func main() {
 		map[string]string{"Name": "precise-code-intel-worker", "Host": "127.0.0.1:6088"},
 	)
 
+	enableEmbeddings, _ := strconv.ParseBool(os.Getenv("SRC_ENABLE_EMBEDDINGS"))
+	if enableEmbeddings {
+		shared.ProcfileAdditions = append(
+			shared.ProcfileAdditions,
+			`embeddings: embeddings`,
+		)
+		shared.SrcProfServices = append(
+			shared.SrcProfServices,
+			map[string]string{"Name": "embeddings", "Host": "127.0.0.1:6099"},
+		)
+	}
+
 	shared.Main()
 }

enterprise/dev/src-prof-services.json

@@ -6,5 +6,6 @@
   { "Name": "repo-updater", "Host": "127.0.0.1:6074" },
   { "Name": "precise-code-intel-worker", "Host": "127.0.0.1:6088" },
   { "Name": "worker", "Host": "127.0.0.1:6089" },
-  { "Name": "worker-executors", "Host": "127.0.0.1:6969" }
+  { "Name": "worker-executors", "Host": "127.0.0.1:6969" },
+  { "Name": "embeddings", "Host": "127.0.0.1:6099" }
 ]

sg.config.yaml

@@ -64,6 +64,7 @@ env:
       { "Name": "github-proxy", "Host": "127.0.0.1:6090" },
       { "Name": "worker", "Host": "127.0.0.1:6089" },
       { "Name": "worker-executors", "Host": "127.0.0.1:6996" },
+      { "Name": "embeddings", "Host": "127.0.0.1:6099" },
       { "Name": "zoekt-index-0", "Host": "127.0.0.1:6072" },
       { "Name": "zoekt-index-1", "Host": "127.0.0.1:6073" },
       { "Name": "zoekt-web-0", "Host": "127.0.0.1:3070", "DefaultPath": "/debug/requests/" },