adds ability for preflight to create config (#196)

internal/models/cli.go

@@ -116,6 +116,8 @@ type NodeOptions struct {
 	OtelTraces          bool   `json:"-"`
 	OtelTracesExporter  string `json:"-"`
 
+	PreflightInit string `json:"-"`
+
 	Errors []error `json:"errors,omitempty"`
 }
 

internal/node/init.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"log/slog"
+	"os"
 
 	nexmodels "github.com/synadia-io/nex/internal/models"
 )
@@ -20,6 +21,33 @@ func CmdUp(opts *nexmodels.Options, nodeopts *nexmodels.NodeOptions, ctx context
 }
 
 func CmdPreflight(opts *nexmodels.Options, nodeopts *nexmodels.NodeOptions, ctx context.Context, cancel context.CancelFunc, log *slog.Logger) error {
+	if nodeopts.PreflightInit != "" {
+		fi, err := os.Stat(nodeopts.ConfigFilepath)
+		if os.IsNotExist(err) {
+			f, err := os.Create(nodeopts.ConfigFilepath)
+			if err != nil {
+				return err
+			}
+			defer f.Close()
+			if nodeopts.PreflightInit == "sandbox" {
+				_, err = f.WriteString(defaultNodeConfig)
+				if err != nil {
+					return err
+				}
+			} else if nodeopts.PreflightInit == "nosandbox" {
+				_, err = f.WriteString(defaultNoSandboxNodeConfig)
+				if err != nil {
+					return err
+				}
+			}
+			log.Debug("Configuration file created.", slog.String("path", nodeopts.ConfigFilepath))
+		} else if err != nil || fi.IsDir() {
+			return err
+		} else {
+			log.Warn("Configuration file already exists, skipping init.", slog.String("path", nodeopts.ConfigFilepath))
+		}
+	}
+
 	config, err := LoadNodeConfiguration(nodeopts.ConfigFilepath)
 	if err != nil {
 		return fmt.Errorf("failed to load configuration file: %s", err)
@@ -34,3 +62,40 @@ func CmdPreflight(opts *nexmodels.Options, nodeopts *nexmodels.NodeOptions, ctx
 
 	return nil
 }
+
+const defaultNodeConfig string = `{
+    "default_resource_dir":"/tmp/nex",
+    "machine_pool_size": 1,
+    "internal_node_host":"10.10.10.1",
+    "cni": {
+        "network_name": "fcnet",
+        "interface_name": "veth0",
+        "subnet": "10.10.10.0/24"
+    },
+    "machine_template": {
+        "vcpu_count": 1,
+        "memsize_mib": 256
+    },
+    "tags": {
+        "simple": "true"
+    }
+}`
+
+const defaultNoSandboxNodeConfig string = `{
+    "default_resource_dir":"/tmp/nex",
+    "machine_pool_size": 1,
+    "internal_node_host":"10.10.10.1",
+    "cni": {
+        "network_name": "fcnet",
+        "interface_name": "veth0",
+        "subnet": "10.10.10.0/24"
+    },
+    "machine_template": {
+        "vcpu_count": 1,
+        "memsize_mib": 256
+    },
+    "tags": {
+        "simple": "true"
+    },
+    "no_sandbox": true
+}`

nex/node_up_preflight.go

@@ -21,6 +21,7 @@ func setConditionalCommands() {
 	nodePreflight = nodes.Command("preflight", "Checks system for node requirements and installs missing")
 	nodePreflight.Flag("force", "installs missing dependencies without prompt").Default("false").BoolVar(&NodeOpts.ForceDepInstall)
 	nodePreflight.Flag("config", "configuration file for the node").Default("./config.json").StringVar(&NodeOpts.ConfigFilepath)
+	nodePreflight.Flag("init", "creates the configuration file if it does not exist").EnumVar(&NodeOpts.PreflightInit, "sandbox", "nosandbox")
 }
 
 func RunNodeUp(ctx context.Context, logger *slog.Logger) error {