feat: support aigw install/uninstall

Signed-off-by: bitliu <bitliu@tencent.com>

Author: Xunzhuo

cmd/aigw/install.go

@@ -0,0 +1,211 @@
+// Copyright Envoy AI Gateway Authors
+// SPDX-License-Identifier: Apache-2.0
+// The full text of the Apache license is available in the LICENSE file at
+// the root of the repo.
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"time"
+
+	"github.com/envoyproxy/ai-gateway/cmd/aigw/internal/installer"
+	"github.com/envoyproxy/ai-gateway/cmd/aigw/internal/ui"
+)
+
+// cmdInstall corresponds to `aigw install` command.
+type cmdInstall struct {
+	// Envoy Gateway options
+	EnvoyGatewayNamespace string `help:"Envoy Gateway installation namespace" default:"envoy-gateway-system"`
+	EnvoyGatewayVersion   string `help:"Envoy Gateway chart version" default:"v0.0.0-latest"`
+
+	// AI Gateway options
+	Namespace string `help:"AI Gateway installation namespace" default:"envoy-ai-gateway-system"`
+	Version   string `help:"AI Gateway chart version" default:"v0.0.0-latest"`
+	SkipCRDs  bool   `help:"Skip AI Gateway CRDs installation"`
+
+	// Common options
+	DryRun  bool          `help:"Show what would be done without executing"`
+	Force   bool          `help:"Skip confirmation prompts"`
+	Debug   bool          `help:"Enable debug logging"`
+	Timeout time.Duration `help:"Timeout for installation operations" default:"5m"`
+}
+
+// install executes the install command.
+func install(ctx context.Context, cmd cmdInstall, stdout, stderr io.Writer) error {
+	output := ui.NewOutput(stdout, cmd.Debug)
+
+	// Print banner
+	output.Banner("Envoy AI Gateway Installation")
+
+	if cmd.DryRun {
+		output.Info("Running in DRY RUN mode - no changes will be made")
+		output.EmptyLine()
+	}
+
+	// Show installation options
+	output.Subheader("Envoy Gateway Installation Options")
+	envoyOptions := []string{
+		fmt.Sprintf("Namespace: %s", cmd.EnvoyGatewayNamespace),
+		fmt.Sprintf("Chart Version: %s", cmd.EnvoyGatewayVersion),
+	}
+	output.List(envoyOptions)
+	output.EmptyLine()
+
+	output.Subheader("Envoy AI Gateway Installation Options")
+	aiOptions := []string{
+		fmt.Sprintf("Namespace: %s", cmd.Namespace),
+		fmt.Sprintf("Chart Version: %s", cmd.Version),
+		fmt.Sprintf("Skip CRDs: %t", cmd.SkipCRDs),
+		fmt.Sprintf("Timeout: %s", cmd.Timeout),
+	}
+	output.List(aiOptions)
+	output.EmptyLine()
+
+	// Confirmation prompt (unless force is specified or dry run)
+	if !cmd.Force && !cmd.DryRun {
+		if !output.ConfirmPrompt("Do you want to proceed with the installation?") {
+			output.Info("Installation cancelled by user")
+			return nil
+		}
+		output.EmptyLine()
+	}
+
+	// Create installation manager
+	manager, err := installer.NewManager(output, cmd.DryRun)
+	if err != nil {
+		return fmt.Errorf("failed to create installation manager: %w", err)
+	}
+
+	// Prepare installation options
+	installOpts := installer.InstallOptions{
+		EnvoyGatewayNamespace: cmd.EnvoyGatewayNamespace,
+		EnvoyGatewayVersion:   cmd.EnvoyGatewayVersion,
+		Namespace:             cmd.Namespace,
+		Version:               cmd.Version,
+		SkipCRDs:              cmd.SkipCRDs,
+		Timeout:               cmd.Timeout,
+		CreateNamespace:       true,
+	}
+
+	// Execute installation
+	err = manager.Install(ctx, installOpts)
+	if err != nil {
+		output.Error(fmt.Sprintf("Installation failed: %v", err))
+		output.EmptyLine()
+		output.Subheader("Troubleshooting")
+		output.List([]string{
+			"Check that your kubeconfig is properly configured",
+			"Ensure you have sufficient permissions in the cluster",
+			"Verify that the cluster meets the minimum version requirements (1.29+)",
+			"Check the cluster has sufficient resources available",
+			"Run with --debug flag for more detailed output",
+		})
+		return err
+	}
+
+	// Show success message and next steps
+	output.EmptyLine()
+	output.Success("Installation completed successfully!")
+	output.EmptyLine()
+
+	output.Subheader("Next Steps")
+	nextSteps := []string{
+		"Verify the installation: kubectl get pods -n " + cmd.Namespace,
+		"Check Envoy Gateway: kubectl get pods -n " + cmd.EnvoyGatewayNamespace,
+		"View the documentation: https://aigateway.envoyproxy.io/docs/latest/getting-started/basic-usage",
+		"Connect providers: https://aigateway.envoyproxy.io/docs/latest/getting-started/connect-providers",
+	}
+	output.NumberedList(nextSteps)
+
+	output.EmptyLine()
+	output.Info("Happy AI Gateway-ing! 🚀")
+
+	return nil
+}
+
+// showInstallationStatus shows the current installation status.
+func showInstallationStatus(ctx context.Context, output *ui.Output, namespace string) error {
+	output.Subheader("Installation Status")
+
+	// This would check the current status of the installation
+	// For now, we'll just show a placeholder
+	output.Info("Checking installation status...")
+
+	// TODO: Implement status checking
+	output.Warning("Status checking not implemented yet")
+
+	return nil
+}
+
+// validateInstallOptions validates the installation options.
+func validateInstallOptions(cmd cmdInstall) error {
+	// Validate namespace name
+	if cmd.Namespace == "" {
+		return fmt.Errorf("namespace cannot be empty")
+	}
+
+	// Validate version format
+	if cmd.Version == "" {
+		return fmt.Errorf("version cannot be empty")
+	}
+
+	// Validate timeout
+	if cmd.Timeout <= 0 {
+		return fmt.Errorf("timeout must be positive")
+	}
+
+	return nil
+}
+
+// showPreInstallationInfo shows information before installation.
+func showPreInstallationInfo(output *ui.Output, cmd cmdInstall) {
+	output.Subheader("Pre-Installation Information")
+
+	info := []string{
+		"This will install Envoy AI Gateway and its dependencies",
+		"Envoy Gateway will be installed in the 'envoy-gateway-system' namespace",
+		fmt.Sprintf("AI Gateway will be installed in the '%s' namespace", cmd.Namespace),
+		"Configuration will be applied to integrate the components",
+	}
+
+	if cmd.SkipCRDs {
+		info = append(info, "CRDs installation will be skipped (ensure they are already installed)")
+	} else {
+		info = append(info, "CRDs will be installed automatically")
+	}
+
+	output.List(info)
+	output.EmptyLine()
+
+	output.Subheader("Prerequisites")
+	prereqs := []string{
+		"kubectl command-line tool",
+		"helm package manager",
+		"Kubernetes cluster version 1.29 or higher",
+		"Sufficient cluster permissions (cluster-admin recommended)",
+	}
+	output.List(prereqs)
+	output.EmptyLine()
+}
+
+// handleInstallationError handles installation errors and provides guidance.
+func handleInstallationError(output *ui.Output, err error) {
+	output.Error(fmt.Sprintf("Installation failed: %v", err))
+	output.EmptyLine()
+
+	output.Subheader("Common Issues and Solutions")
+	solutions := []string{
+		"Permission denied: Ensure you have cluster-admin permissions",
+		"Connection refused: Check your kubeconfig and cluster connectivity",
+		"Version mismatch: Verify your Kubernetes cluster version is 1.29+",
+		"Resource conflicts: Check if components are already installed",
+		"Timeout errors: Increase timeout with --timeout flag",
+	}
+	output.List(solutions)
+	output.EmptyLine()
+
+	output.Info("For more help, visit: https://aigateway.envoyproxy.io/docs/latest/getting-started/installation")
+}