🎨 adding optional override of dnsrr mode for testing purpose on master (⚠️ devops) (#5363)

Author: matusdrobuliak66

.env-devel

@@ -60,6 +60,7 @@ COMPUTATIONAL_BACKEND_DEFAULT_FILE_LINK_TYPE=PRESIGNED
 COMPUTATIONAL_BACKEND_ON_DEMAND_CLUSTERS_FILE_LINK_TYPE=PRESIGNED
 DIRECTOR_V2_DEV_FEATURES_ENABLED=0
 
+DYNAMIC_SIDECAR_ENDPOINT_SPECS_MODE_DNSRR_ENABLED=0
 DYNAMIC_SIDECAR_IMAGE=${DOCKER_REGISTRY:-itisfoundation}/dynamic-sidecar:${DOCKER_IMAGE_TAG:-latest}
 DYNAMIC_SIDECAR_LOG_LEVEL=DEBUG
 DYNAMIC_SIDECAR_PROMETHEUS_SERVICE_LABELS={}

services/director-v2/src/simcore_service_director_v2/core/dynamic_services_settings/sidecar.py

@@ -97,6 +97,11 @@ def warn_if_any_values_provided(cls, value: dict) -> dict:
 
 
 class DynamicSidecarSettings(BaseCustomSettings, MixinLoggingSettings):
+    DYNAMIC_SIDECAR_ENDPOINT_SPECS_MODE_DNSRR_ENABLED: bool = Field(  # doc: https://docs.docker.com/engine/swarm/networking/#configure-service-discovery
+        default=False,
+        env=["DYNAMIC_SIDECAR_ENDPOINT_SPECS_MODE_DNSRR_ENABLED"],
+        description="dynamic-sidecar's service 'endpoint_spec' with {'Mode': 'dnsrr'}",
+    )
     DYNAMIC_SIDECAR_SC_BOOT_MODE: BootModeEnum = Field(
         ...,
         description="Boot mode used for the dynamic-sidecar services"

services/director-v2/src/simcore_service_director_v2/modules/dynamic_sidecar/docker_service_specs/sidecar.py

@@ -448,6 +448,9 @@ def get_dynamic_sidecar_spec(  # pylint:disable=too-many-arguments# noqa: PLR091
         },
     }
 
+    if dynamic_sidecar_settings.DYNAMIC_SIDECAR_ENDPOINT_SPECS_MODE_DNSRR_ENABLED:
+        create_service_params["endpoint_spec"] = {"Mode": "dnsrr"}
+
     update_service_params_from_settings(
         labels_service_settings=settings,
         create_service_params=create_service_params,

services/docker-compose.yml

@@ -267,6 +267,7 @@ services:
       - DIRECTOR_V2_DYNAMIC_SCHEDULER_IGNORE_SERVICES_SHUTDOWN_WHEN_CREDITS_LIMIT_REACHED=${DIRECTOR_V2_DYNAMIC_SCHEDULER_IGNORE_SERVICES_SHUTDOWN_WHEN_CREDITS_LIMIT_REACHED}
       - DIRECTOR_V2_SERVICES_CUSTOM_CONSTRAINTS=${DIRECTOR_V2_SERVICES_CUSTOM_CONSTRAINTS}
 
+      - DYNAMIC_SIDECAR_ENDPOINT_SPECS_MODE_DNSRR_ENABLED=${DYNAMIC_SIDECAR_ENDPOINT_SPECS_MODE_DNSRR_ENABLED}
       - DYNAMIC_SIDECAR_ENABLE_VOLUME_LIMITS=${DYNAMIC_SIDECAR_ENABLE_VOLUME_LIMITS}
       - DYNAMIC_SIDECAR_IMAGE=${DYNAMIC_SIDECAR_IMAGE}
       - DYNAMIC_SIDECAR_LOG_LEVEL=${DYNAMIC_SIDECAR_LOG_LEVEL}