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- Add a `metalctl console` subcommand with which you are able to connect to a `Servers` serial console - Factor out `bmcutils` into an own package
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Original file line number | Diff line number | Diff line change |
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and IronCore contributors | ||
// SPDX-License-Identifier: Apache-2.0 | ||
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package app | ||
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import ( | ||
"context" | ||
"fmt" | ||
"io" | ||
"log" | ||
"log/slog" | ||
"net" | ||
"os" | ||
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"github.com/ironcore-dev/metal-operator/internal/console" | ||
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"github.com/spf13/cobra" | ||
"golang.org/x/crypto/ssh" | ||
"sigs.k8s.io/controller-runtime/pkg/client" | ||
"sigs.k8s.io/controller-runtime/pkg/client/config" | ||
) | ||
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var ( | ||
kubeconfigPath string | ||
kubeconfig string | ||
serialConsoleNumber int | ||
) | ||
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func NewConsoleCommand() *cobra.Command { | ||
consoleCmd := &cobra.Command{ | ||
Use: "console", | ||
Short: "Access the serial console of a Server", | ||
RunE: runConsole, | ||
} | ||
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consoleCmd.Flags().StringVar(&kubeconfig, "kubeconfig", "", "Path to a kubeconfig.") | ||
consoleCmd.Flags().IntVar(&serialConsoleNumber, "serial-console-number", 1, "Serial console number.") | ||
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if verbose { | ||
slog.SetLogLoggerLevel(slog.LevelDebug) | ||
} | ||
return consoleCmd | ||
} | ||
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func runConsole(cmd *cobra.Command, args []string) error { | ||
if len(args) == 0 { | ||
return fmt.Errorf("server name is required") | ||
} | ||
var serverName string | ||
if len(args) > 1 { | ||
return fmt.Errorf("too many arguments") | ||
} | ||
serverName = args[0] | ||
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k8sClient, err := createClient() | ||
if err != nil { | ||
return err | ||
} | ||
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if err := openConsoleStream(cmd.Context(), k8sClient, serverName); err != nil { | ||
return err | ||
} | ||
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return nil | ||
} | ||
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func openConsoleStream(ctx context.Context, k8sClient client.Client, serverName string) error { | ||
consoleConfig, err := console.GetConfigForServerName(ctx, k8sClient, serverName) | ||
if err != nil { | ||
return fmt.Errorf("failed to get console config: %w", err) | ||
} | ||
if consoleConfig == nil { | ||
return fmt.Errorf("console config is nil") | ||
} | ||
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// Create SSH client configuration | ||
sshConfig := &ssh.ClientConfig{ | ||
User: consoleConfig.Username, | ||
Auth: []ssh.AuthMethod{ | ||
ssh.Password(consoleConfig.Password), | ||
}, | ||
// TODO: use proper key verification | ||
HostKeyCallback: ssh.InsecureIgnoreHostKey(), | ||
} | ||
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// Connect to the BMC | ||
bmcAddress := net.JoinHostPort(consoleConfig.BMCAddress, "22") | ||
conn, err := ssh.Dial("tcp", bmcAddress, sshConfig) | ||
if err != nil { | ||
return fmt.Errorf("failed to connect to BMC: %w", err) | ||
} | ||
defer func(conn *ssh.Client) { | ||
if err = conn.Close(); err != nil { | ||
log.Printf("failed to close SSH connection: %v", err) | ||
} | ||
}(conn) | ||
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// Start a session | ||
session, err := conn.NewSession() | ||
if err != nil { | ||
return fmt.Errorf("failed to create SSH session: %w", err) | ||
} | ||
defer func(session *ssh.Session) { | ||
if err = session.Close(); err != nil { | ||
log.Printf("failed to close SSH session: %v", err) | ||
} | ||
}(session) | ||
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// Request a pseudo-terminal for interactive sessions | ||
if err = session.RequestPty("xterm", 80, 40, ssh.TerminalModes{ | ||
ssh.ECHO: 0, // Disable echo | ||
ssh.TTY_OP_ISPEED: 14400, // Input speed | ||
ssh.TTY_OP_OSPEED: 14400, // Output speed | ||
}); err != nil { | ||
return fmt.Errorf("failed to request pseudo-terminal failed: %w", err) | ||
} | ||
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// Start the SOL session | ||
stdin, err := session.StdinPipe() | ||
if err != nil { | ||
return fmt.Errorf("could not get stdin pipe: %w", err) | ||
} | ||
stdout, err := session.StdoutPipe() | ||
if err != nil { | ||
return fmt.Errorf("could not get stdout pipe: %w", err) | ||
} | ||
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go func() { | ||
_, err = io.Copy(os.Stdout, stdout) | ||
if err != nil { | ||
log.Printf("failed to copy stdout: %s", err) | ||
} | ||
}() // Stream the SOL output to the terminal | ||
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if err = session.Start(fmt.Sprintf("console %d", serialConsoleNumber)); err != nil { | ||
return fmt.Errorf("failed to start SOL command: %w", err) | ||
} | ||
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log.Println("Serial-over-LAN session active. Press Ctrl+C to exit.") | ||
go func() { | ||
// Allow sending input to the session | ||
_, err = io.Copy(stdin, os.Stdin) | ||
if err != nil { | ||
log.Printf("failed to copy stdin: %s", err) | ||
} | ||
}() | ||
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// Wait for the session to end | ||
if err := session.Wait(); err != nil { | ||
return fmt.Errorf("error during SOL session: %v", err) | ||
} | ||
return nil | ||
} | ||
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func createClient() (client.Client, error) { | ||
if kubeconfig != "" { | ||
kubeconfigPath = kubeconfig | ||
} else { | ||
kubeconfigPath = os.Getenv("KUBECONFIG") | ||
if kubeconfigPath == "" { | ||
fmt.Println("Error: --kubeconfig flag or KUBECONFIG environment variable must be set") | ||
os.Exit(1) | ||
} | ||
} | ||
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clientConfig, err := config.GetConfigWithContext("") | ||
if err != nil { | ||
return nil, fmt.Errorf("failed getting client config: %w", err) | ||
} | ||
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k8sClient, err := client.New(clientConfig, client.Options{Scheme: scheme}) | ||
if err != nil { | ||
return nil, fmt.Errorf("failed creating controller-runtime client: %w", err) | ||
} | ||
return k8sClient, nil | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,63 @@ | ||
// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and IronCore contributors | ||
// SPDX-License-Identifier: Apache-2.0 | ||
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package console | ||
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import ( | ||
"context" | ||
"fmt" | ||
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"github.com/ironcore-dev/metal-operator/api/v1alpha1" | ||
"github.com/ironcore-dev/metal-operator/internal/bmcutils" | ||
"sigs.k8s.io/controller-runtime/pkg/client" | ||
) | ||
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type Config struct { | ||
BMCAddress string | ||
Username string | ||
Password string | ||
} | ||
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func GetConfigForServerName(ctx context.Context, c client.Client, serverName string) (*Config, error) { | ||
server := &v1alpha1.Server{} | ||
if err := c.Get(ctx, client.ObjectKey{Name: serverName}, server); err != nil { | ||
return nil, fmt.Errorf("failed to get server %q: %w", serverName, err) | ||
} | ||
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// Inline BMC configuration | ||
if server.Spec.BMC != nil { | ||
username, password, err := bmcutils.GetBMCCredentialsForBMCSecretName(ctx, c, server.Spec.BMC.BMCSecretRef.Name) | ||
if err != nil { | ||
return nil, err | ||
} | ||
return &Config{ | ||
BMCAddress: server.Spec.BMC.Address, | ||
Username: username, | ||
Password: password, | ||
}, nil | ||
} | ||
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// BMC by reference | ||
if server.Spec.BMCRef != nil { | ||
bmc, err := bmcutils.GetBMCFromBMCName(ctx, c, server.Spec.BMCRef.Name) | ||
if err != nil { | ||
return nil, err | ||
} | ||
username, password, err := bmcutils.GetBMCCredentialsForBMCSecretName(ctx, c, bmc.Spec.BMCSecretRef.Name) | ||
if err != nil { | ||
return nil, err | ||
} | ||
address, err := bmcutils.GetBMCAddressForBMC(ctx, c, bmc) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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return &Config{ | ||
BMCAddress: address, | ||
Username: username, | ||
Password: password, | ||
}, nil | ||
} | ||
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return nil, nil | ||
} |
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