operator v1: add additionalCommandlineArguments flag

additionalCommandlineArguments needs to be per-nodepool, because it can
have different values. concrete example is the --cpuset flag, which
differs.

operator/api/vectorized/v1alpha1/cluster_types.go

@@ -222,6 +222,10 @@ type NodePoolSpec struct {
 	// Cache directory that will be mounted for Cloud Storage.
 	// +required
 	CloudCacheStorage StorageSpec `json:"cloudCacheStorage"`
+	// Additional command line arguments that we pass to the redpanda binary
+	// These are applied last and will override any other command line arguments that may be defined,
+	// including the ones added when setting `DeveloperMode` to `true`.
+	AdditionalCommandlineArguments map[string]string `json:"additionalCommandlineArguments,omitempty"`
 }
 
 // RestartConfig contains strategies to configure how the cluster behaves when restarting, because of upgrades

operator/config/crd/bases/redpanda.vectorized.io_clusters.yaml

@@ -1027,6 +1027,14 @@ spec:
                     Replicas, so they can be controlled independently
                     Resources, because this is tied strongly to the actual machine shape backing the NodePool.
                   properties:
+                    additionalCommandlineArguments:
+                      additionalProperties:
+                        type: string
+                      description: |-
+                        Additional command line arguments that we pass to the redpanda binary
+                        These are applied last and will override any other command line arguments that may be defined,
+                        including the ones added when setting `DeveloperMode` to `true`.
+                      type: object
                     cloudCacheStorage:
                       description: Cache directory that will be mounted for Cloud
                         Storage.