|
| 1 | +package cloud |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "encoding/json" |
| 6 | + "fmt" |
| 7 | + "os" |
| 8 | + "os/exec" |
| 9 | + "strings" |
| 10 | + |
| 11 | + "github.com/aws/aws-sdk-go-v2/aws" |
| 12 | + awsConfig "github.com/aws/aws-sdk-go-v2/config" |
| 13 | + "github.com/aws/aws-sdk-go-v2/service/ssm" |
| 14 | + "github.com/openshift/backplane-cli/pkg/cli/config" |
| 15 | + bpCredentials "github.com/openshift/backplane-cli/pkg/credentials" |
| 16 | + "github.com/openshift/backplane-cli/pkg/ocm" |
| 17 | + logger "github.com/sirupsen/logrus" |
| 18 | + "github.com/spf13/cobra" |
| 19 | + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 20 | + "k8s.io/cli-runtime/pkg/genericclioptions" |
| 21 | + "k8s.io/client-go/kubernetes" |
| 22 | + "k8s.io/client-go/rest" |
| 23 | +) |
| 24 | + |
| 25 | +var ( |
| 26 | + CreateClientSet func(*rest.Config) (kubernetes.Interface, error) = createClientSet |
| 27 | + GetInstanceID func(node string, config *rest.Config) (string, error) = getInstanceID |
| 28 | + StartSSMsession func(cmd *cobra.Command, argv []string) error = startSSMsession |
| 29 | + ExecCommand func(name string, arg ...string) *exec.Cmd = exec.Command |
| 30 | + NewFromConfig func(cfg aws.Config) SSMClient = NewFromConfigVar |
| 31 | + GetCurrentKubeconfig func() (*rest.Config, error) = getCurrentKubeconfig |
| 32 | + FetchCloudCredentials func() (*bpCredentials.AWSCredentialsResponse, error) = fetchCloudCredentials |
| 33 | +) |
| 34 | + |
| 35 | +func NewFromConfigVar(cfg aws.Config) SSMClient { |
| 36 | + return ssm.NewFromConfig(cfg) |
| 37 | +} |
| 38 | + |
| 39 | +var ( |
| 40 | + createClientSet = func(c *rest.Config) (kubernetes.Interface, error) { return kubernetes.NewForConfig(c) } |
| 41 | +) |
| 42 | + |
| 43 | +var ssmArgs struct { |
| 44 | + node string |
| 45 | +} |
| 46 | + |
| 47 | +var SSMSessionCmd = &cobra.Command{ |
| 48 | + Use: "ssm", |
| 49 | + Short: "Start an AWS SSM session for a node", |
| 50 | + Long: "Start an AWS SSM session for the specified node provided to debug.", |
| 51 | + Args: cobra.ExactArgs(0), |
| 52 | + RunE: startSSMsession, |
| 53 | +} |
| 54 | + |
| 55 | +func init() { |
| 56 | + SSMSessionCmd.Flags().StringVar(&ssmArgs.node, "node", "", "Specify the node name to start the SSM session.") |
| 57 | +} |
| 58 | + |
| 59 | +func fetchCloudCredentials() (*bpCredentials.AWSCredentialsResponse, error) { |
| 60 | + var clusterKey string |
| 61 | + clusterInfo, err := GetBackplaneClusterFromConfig() |
| 62 | + if err != nil { |
| 63 | + return nil, fmt.Errorf("expected exactly one cluster: %w", err) |
| 64 | + } |
| 65 | + clusterKey = clusterInfo.ClusterID |
| 66 | + |
| 67 | + clusterID, clusterName, err := ocm.DefaultOCMInterface.GetTargetCluster(clusterKey) |
| 68 | + if err != nil { |
| 69 | + return nil, fmt.Errorf("expected exactly one cluster: %w", err) |
| 70 | + } |
| 71 | + |
| 72 | + cluster, err := ocm.DefaultOCMInterface.GetClusterInfoByID(clusterID) |
| 73 | + if err != nil { |
| 74 | + return nil, fmt.Errorf("failed to get cluster info for %s: %w", clusterID, err) |
| 75 | + } |
| 76 | + |
| 77 | + logger.WithFields(logger.Fields{ |
| 78 | + "ID": clusterID, |
| 79 | + "Name": clusterName}).Infoln("Target cluster") |
| 80 | + |
| 81 | + backplaneConfig, err := config.GetBackplaneConfiguration() |
| 82 | + if err != nil { |
| 83 | + return nil, fmt.Errorf("failed to get backplane configuration: %w", err) |
| 84 | + } |
| 85 | + |
| 86 | + ocmConnection, err := ocm.DefaultOCMInterface.SetupOCMConnection() |
| 87 | + if err != nil { |
| 88 | + return nil, fmt.Errorf("failed to create OCM connection: %w", err) |
| 89 | + } |
| 90 | + defer ocmConnection.Close() |
| 91 | + |
| 92 | + queryConfig := &QueryConfig{OcmConnection: ocmConnection, BackplaneConfiguration: backplaneConfig, Cluster: cluster} |
| 93 | + |
| 94 | + creds, err := queryConfig.GetCloudCredentials() |
| 95 | + if err != nil { |
| 96 | + return nil, fmt.Errorf("failed to fetch cloud credentials: %w", err) |
| 97 | + } |
| 98 | + |
| 99 | + awsCreds, ok := creds.(*bpCredentials.AWSCredentialsResponse) |
| 100 | + if !ok { |
| 101 | + return nil, fmt.Errorf("unexpected credentials type: %T", creds) |
| 102 | + } |
| 103 | + |
| 104 | + logger.Info("Successfully fetched cloud credentials.") |
| 105 | + return awsCreds, nil |
| 106 | +} |
| 107 | + |
| 108 | +func getInstanceID(nodeName string, config *rest.Config) (string, error) { |
| 109 | + clientset, err := CreateClientSet(config) |
| 110 | + if err != nil { |
| 111 | + return "", fmt.Errorf("failed to create client: %w", err) |
| 112 | + } |
| 113 | + |
| 114 | + node, err := clientset.CoreV1().Nodes().Get(context.TODO(), nodeName, metav1.GetOptions{}) |
| 115 | + if err != nil { |
| 116 | + return "", fmt.Errorf("failed to get node %s: %w", nodeName, err) |
| 117 | + } |
| 118 | + |
| 119 | + if node.Spec.ProviderID == "" { |
| 120 | + return "", fmt.Errorf("providerID is not set") |
| 121 | + } |
| 122 | + |
| 123 | + // Extract instance ID from ProviderID |
| 124 | + instanceID := strings.Split(node.Spec.ProviderID, "/")[len(strings.Split(node.Spec.ProviderID, "/"))-1] |
| 125 | + return instanceID, nil |
| 126 | +} |
| 127 | + |
| 128 | +func startSSMsession(cmd *cobra.Command, argv []string) error { |
| 129 | + if ssmArgs.node == "" { |
| 130 | + return fmt.Errorf("--node flag is required") |
| 131 | + } |
| 132 | + |
| 133 | + // Fetch cloud credentials and export them as environment variables |
| 134 | + creds, err := FetchCloudCredentials() // Use the variable instead of direct call |
| 135 | + if err != nil { |
| 136 | + return fmt.Errorf("failed to fetch cloud credentials: %w", err) |
| 137 | + } |
| 138 | + |
| 139 | + // Set AWS credentials in environment variables |
| 140 | + os.Setenv("AWS_ACCESS_KEY_ID", creds.AccessKeyID) |
| 141 | + os.Setenv("AWS_SECRET_ACCESS_KEY", creds.SecretAccessKey) |
| 142 | + os.Setenv("AWS_SESSION_TOKEN", creds.SessionToken) |
| 143 | + |
| 144 | + kubeconfig, err := getCurrentKubeconfig() |
| 145 | + if err != nil { |
| 146 | + return fmt.Errorf("failed to get kubeconfig: %w", err) |
| 147 | + } |
| 148 | + |
| 149 | + instanceID, err := getInstanceID(ssmArgs.node, kubeconfig) |
| 150 | + if err != nil { |
| 151 | + return fmt.Errorf("failed to get instance ID for node %s: %w", ssmArgs.node, err) |
| 152 | + } |
| 153 | + |
| 154 | + logger.Infof("Starting SSM session for node: %s with Instance ID: %s", ssmArgs.node, instanceID) |
| 155 | + |
| 156 | + cfg, err := awsConfig.LoadDefaultConfig(context.TODO(), awsConfig.WithRegion(creds.Region)) |
| 157 | + if err != nil { |
| 158 | + return fmt.Errorf("unable to load SDK config: %v", err) |
| 159 | + } |
| 160 | + ssmClient := NewFromConfig(cfg) |
| 161 | + |
| 162 | + input := &ssm.StartSessionInput{ |
| 163 | + Target: aws.String(instanceID), |
| 164 | + } |
| 165 | + |
| 166 | + result, err := ssmClient.StartSession(context.TODO(), input) |
| 167 | + if err != nil { |
| 168 | + return fmt.Errorf("failed to start SSM session via SDK: %w", err) |
| 169 | + } |
| 170 | + |
| 171 | + // Ensure the session details are not nil |
| 172 | + if result.SessionId == nil || result.StreamUrl == nil || result.TokenValue == nil { |
| 173 | + return fmt.Errorf("session details are incomplete: SessionId=%v, StreamUrl=%v, TokenValue=%v", result.SessionId, result.StreamUrl, result.TokenValue) |
| 174 | + } |
| 175 | + |
| 176 | + // Log session details for debugging |
| 177 | + logger.Infof("SessionId: %v", *result.SessionId) |
| 178 | + logger.Infof("StreamUrl: %v", *result.StreamUrl) |
| 179 | + logger.Infof("TokenValue: %v", *result.TokenValue) |
| 180 | + |
| 181 | + // Prepare arguments for Session Manager Plugin |
| 182 | + sessionJSON, err := json.Marshal(map[string]string{ |
| 183 | + "SessionId": *result.SessionId, |
| 184 | + "StreamUrl": *result.StreamUrl, |
| 185 | + "TokenValue": *result.TokenValue, |
| 186 | + }) |
| 187 | + if err != nil { |
| 188 | + return fmt.Errorf("failed to serialize session details: %w", err) |
| 189 | + } |
| 190 | + |
| 191 | + //Check if session command is installed |
| 192 | + ValidateSessionCmd := ExecCommand("session-manager-plugin", "--version") |
| 193 | + err = ValidateSessionCmd.Run() |
| 194 | + if err != nil { |
| 195 | + return fmt.Errorf("session-manager-plugin is not installed. Please refer AWS doc: https://docs.aws.amazon.com/systems-manager/latest/userguide/session-manager-working-with-install-plugin.html") |
| 196 | + } |
| 197 | + |
| 198 | + cmdArgs := []string{"session-manager-plugin", string(sessionJSON), creds.Region, "StartSession"} |
| 199 | + pluginCmd := ExecCommand(cmdArgs[0], cmdArgs[1:]...) //#nosec G204: Command arguments are trusted |
| 200 | + pluginCmd.Stdout = os.Stdout |
| 201 | + pluginCmd.Stderr = os.Stderr |
| 202 | + pluginCmd.Stdin = os.Stdin |
| 203 | + |
| 204 | + return pluginCmd.Run() |
| 205 | +} |
| 206 | + |
| 207 | +func getCurrentKubeconfig() (*rest.Config, error) { |
| 208 | + cf := genericclioptions.NewConfigFlags(true) |
| 209 | + config, err := cf.ToRESTConfig() |
| 210 | + if err != nil { |
| 211 | + return nil, err |
| 212 | + } |
| 213 | + return config, nil |
| 214 | +} |
| 215 | + |
| 216 | +// Define SSMClient interface |
| 217 | +type SSMClient interface { |
| 218 | + StartSession(ctx context.Context, params *ssm.StartSessionInput, optFns ...func(*ssm.Options)) (*ssm.StartSessionOutput, error) |
| 219 | +} |
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