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feat(nats): present projected SA-token as NATS bearer (B4) #2

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Merged
hbrombeer merged 1 commit into from
Jun 2, 2026
Merged

feat(nats): present projected SA-token as NATS bearer (B4) #2

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2 changes: 1 addition & 1 deletion velocity/build.gradle.kts
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Original file line number Diff line number Diff line change
Expand Up @@ -2,5 +2,5 @@ plugins { id("gg.grounds.velocity") version "0.1.1" }

dependencies {
implementation(project(":api"))
implementation("io.nats:jnats:2.21.1")
implementation("io.nats:jnats:2.25.3")
}
15 changes: 12 additions & 3 deletions velocity/src/main/kotlin/gg/grounds/proxy/velocity/handler/NatsHandler.kt
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Expand Up @@ -7,6 +7,8 @@ import io.nats.client.Nats
import io.nats.client.Options
import io.nats.client.Subscription
import java.nio.charset.StandardCharsets
import java.nio.file.Files
import java.nio.file.Path
import java.time.Duration
import org.slf4j.Logger

Expand All @@ -15,7 +17,7 @@ class NatsHandler(private val natsUrl: String, private val logger: Logger) : Aut
private lateinit var dispatcher: Dispatcher

fun connect() {
val options =
val builder =
Options.Builder()
.server(natsUrl)
.connectionName("plugin-proxy")
Expand All @@ -30,8 +32,15 @@ class NatsHandler(private val natsUrl: String, private val logger: Logger) : Aut
else -> {}
}
}
.build()
connection = Nats.connect(options)
// Present the projected SA-token (audience grounds-services) as the NATS
// bearer for the auth-callout broker. Re-read per (re)connect for kubelet
// rotation; skipped when absent (local/dev without the projected volume).
val tokenFile = System.getenv("GROUNDS_TOKEN_FILE") ?: "/var/run/secrets/grounds/token"
val tokenPath = Path.of(tokenFile)
if (Files.exists(tokenPath)) {
builder.tokenSupplier { Files.readString(tokenPath).trim().toCharArray() }
}
connection = Nats.connect(builder.build())
dispatcher = connection.createDispatcher()
logger.info("Connected to NATS (url={})", natsUrl)
}
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