Add Load Balancer configuration through charm config

charms/worker/k8s/charmcraft.yaml

@@ -185,6 +185,54 @@ config:
       default: false
       description: |
         Enable/Disable the gateway feature on the cluster.
+    load-balancer-enabled:
+      type: boolean
+      default: false
+      description: |
+        Enable/Disable the load balancer feature on the cluster.
+    load-balancer-cidrs:
+      type: string
+      default: ""
+      description: |
+        Space-separated list of CIDRs to use for the load balancer. This is
+        only used if load-balancer-enabled is set to true.
+    load-balancer-l2-mode:
+      type: boolean
+      default: false
+      description: |
+        Enable/Disable L2 mode for the load balancer. This is only used if
+        load-balancer-enabled is set to true.
+    load-balancer-l2-interfaces:
+      type: string
+      default: ""
+      description: |
+        Space-separated list of interfaces to use for the load balancer. This
+        is only used if load-balancer-l2-mode is set to true. if unset, all
+        interfaces will be used.
+    load-balancer-bgp-mode:
+      type: boolean
+      default: false
+      description: |
+        Enable/Disable BGP mode for the load balancer. This is only used if
+        load-balancer-enabled is set to true.
+    load-balancer-bgp-local-asn:
+      type: int
+      default: 64512
+      description: |
+        Local ASN for the load balancer. This is only used if load-balancer-bgp-mode
+        is set to true.
+    load-balancer-bgp-peer-address:
+      type: string
+      default: ""
+      description: |
+        Address of the BGP peer for the load balancer. This is only used if
+        load-balancer-bgp-mode is set to true.
+    load-balancer-bgp-peer-port:
+      type: int
+      default: 179
+      description: |
+        Port of the BGP peer for the load balancer. This is only used if
+        load-balancer-bgp-mode is set to true.
     local-storage-enabled:
       type: boolean
       default: true

charms/worker/k8s/lib/charms/k8s/v0/k8sd_api_manager.py

@@ -230,9 +230,9 @@ class LoadBalancerConfig(BaseModel, allow_population_by_field_name=True):
     Attributes:
         enabled: Optional flag which represents the status of LoadBalancer.
         cidrs: List of CIDR blocks for the load balancer.
-        l2_enabled: Optional flag to enable or disable layer 2 functionality.
+        l2_mode: Optional flag to enable or disable layer 2 mode.
         l2_interfaces: List of layer 2 interfaces for the load balancer.
-        bgp_enabled: Optional flag to enable or disable BGP.
+        bgp_mode: Optional flag to enable or disable BGP.
         bgp_local_asn: The local ASN for BGP configuration.
         bgp_peer_address: The peer address for BGP configuration.
         bgp_peer_asn: The peer ASN for BGP configuration.
@@ -241,9 +241,9 @@ class LoadBalancerConfig(BaseModel, allow_population_by_field_name=True):
 
     enabled: Optional[bool] = Field(default=None)
     cidrs: Optional[List[str]] = Field(default=None)
-    l2_enabled: Optional[bool] = Field(default=None, alias="l2-enabled")
+    l2_mode: Optional[bool] = Field(default=None, alias="l2-mode")
     l2_interfaces: Optional[List[str]] = Field(default=None, alias="l2-interfaces")
-    bgp_enabled: Optional[bool] = Field(default=None, alias="bgp-enabled")
+    bgp_mode: Optional[bool] = Field(default=None, alias="bgp-mode")
     bgp_local_asn: Optional[int] = Field(default=None, alias="bgp-local-asn")
     bgp_peer_address: Optional[str] = Field(default=None, alias="bgp-peer-address")
     bgp_peer_asn: Optional[int] = Field(default=None, alias="bgp-peer-asn")

charms/worker/k8s/src/charm.py

@@ -45,6 +45,7 @@
     JoinClusterRequest,
     K8sdAPIManager,
     K8sdConnectionError,
+    LoadBalancerConfig,
     LocalStorageConfig,
     NetworkConfig,
     UnixSocketConnectionFactory,
@@ -427,6 +428,18 @@ def _assemble_cluster_config(self) -> UserFacingClusterConfig:
             enabled=self.config.get("network-enabled"),
         )
 
+        load_balancer = LoadBalancerConfig(
+            enabled=self.config.get("load-balancer-enabled"),
+            cidrs=str(self.config.get("load-balancer-cidrs")).split(),
+            l2_mode=self.config.get("load-balancer-l2-mode"),
+            l2_interfaces=str(self.config.get("load-balancer-l2-interfaces")).split(),
+            bgp_mode=self.config.get("load-balancer-bgp-mode"),
+            bgp_local_asn=self.config.get("load-balancer-bgp-local-asn"),
+            bgp_peer_address=self.config.get("load-balancer-bgp-peer-address"),
+            bgp_peer_asn=self.config.get("load-balancer-bgp-peer-asn"),
+            bgp_peer_port=self.config.get("load-balancer-bgp-peer-port"),
+        )
+
         cloud_provider = None
         if self.xcp.has_xcp:
             cloud_provider = "external"
@@ -437,6 +450,7 @@ def _assemble_cluster_config(self) -> UserFacingClusterConfig:
             network=network,
             annotations=self._get_valid_annotations(),
             cloud_provider=cloud_provider,
+            load_balancer=load_balancer,
         )
 
     def _configure_datastore(self, config: Union[BootstrapConfig, UpdateClusterConfigRequest]):