Ref #34608: add option to specify DNS server

Author: LEDfan

src/main/kotlin/eu/openanalytics/shinyproxyoperator/impl/docker/DockerOrchestrator.kt

@@ -247,6 +247,7 @@ class DockerOrchestrator(channel: Channel<ShinyProxyEvent>,
                     .memory(memoryToBytes(shinyProxy.memoryLimit))
                     .cpuPeriod(cpuPeriod)
                     .cpuQuota(cpuQuota)
+                    .dns(shinyProxy.dns)
 
                 if (monitoringConfig.isEnabled()) {
                     hostConfigBuilder.logConfig(LogConfig.builder()

src/main/kotlin/eu/openanalytics/shinyproxyoperator/impl/kubernetes/components/PodTemplateSpecFactory.kt

@@ -142,6 +142,9 @@ class PodTemplateSpecFactory(config: Config) {
                         .endStartupProbe()
                         .withTerminationMessagePolicy("FallbackToLogsOnError")
                     .endContainer()
+                    .withNewDnsConfig()
+                        .addToNameservers(*shinyProxy.dns.toTypedArray())
+                    .endDnsConfig()
                     .withAffinity(createAffinity(shinyProxy, shinyProxyInstance))
                     .withVolumes(VolumeBuilder()
                             .withName("config-volume")

src/main/kotlin/eu/openanalytics/shinyproxyoperator/model/ShinyProxy.kt

@@ -120,6 +120,14 @@ class ShinyProxy(private val spec: JsonNode, val name: String, val namespace: St
         return@lazy spec.getTextValueOrNull("cpu-limit") ?: spec.getTextValueOrNull("cpuLimit")
     }
 
+    @get:JsonIgnore
+    val dns: List<String> by lazy {
+        if (spec.get("dns")?.isArray == true) {
+            return@lazy spec.get("dns").elements().asSequence().map { it.textValue() }.toList()
+        }
+        return@lazy listOf()
+    }
+
     fun getSpec(): JsonNode {
         return spec
     }