|
| 1 | +package kube |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "fmt" |
| 6 | + "path/filepath" |
| 7 | + "reflect" |
| 8 | + "strings" |
| 9 | + |
| 10 | + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 11 | + "k8s.io/client-go/kubernetes" |
| 12 | + "k8s.io/client-go/tools/clientcmd" |
| 13 | + "k8s.io/client-go/util/homedir" |
| 14 | + |
| 15 | + "github.com/aws/aws-sdk-go-v2/service/ec2" |
| 16 | + "github.com/aws/aws-sdk-go-v2/service/ec2/types" |
| 17 | + "github.com/aws/aws-sdk-go-v2/service/eks" |
| 18 | + "github.com/aws/aws-sdk-go-v2/service/iam" |
| 19 | + "github.com/sourcegraph/src-cli/internal/validate" |
| 20 | + |
| 21 | + "github.com/sourcegraph/sourcegraph/lib/errors" |
| 22 | +) |
| 23 | + |
| 24 | +type EbsTestObjects struct { |
| 25 | + addons []string |
| 26 | + serviceAccount string |
| 27 | + ebsRolePolicy RolePolicy |
| 28 | +} |
| 29 | + |
| 30 | +// EksEbsCsiDrivers will validate that EKS cluster has ebs-cli drivers installed and configured |
| 31 | +func EksEbsCsiDrivers(ctx context.Context, config *Config) ([]validate.Result, error) { |
| 32 | + var results []validate.Result |
| 33 | + var ebsTestParams EbsTestObjects |
| 34 | + |
| 35 | + addons, err := getAddons(ctx, config.eksClient) |
| 36 | + if err != nil { |
| 37 | + results = append(results, validate.Result{ |
| 38 | + Status: validate.Failure, |
| 39 | + Message: "EKS: could not validate ebs in addons", |
| 40 | + }) |
| 41 | + return results, err |
| 42 | + } |
| 43 | + |
| 44 | + ebsSA, err := getEbsSA(ctx, config.clientSet) |
| 45 | + if err != nil { |
| 46 | + results = append(results, validate.Result{ |
| 47 | + Status: validate.Failure, |
| 48 | + Message: "EKS: could not validate ebs service account", |
| 49 | + }) |
| 50 | + return results, err |
| 51 | + } |
| 52 | + |
| 53 | + EBSCSIRole, err := getEBSCSIRole(ctx, config.iamClient, ebsSA) |
| 54 | + if err != nil { |
| 55 | + results = append(results, validate.Result{ |
| 56 | + Status: validate.Failure, |
| 57 | + Message: "EKS: could not validate ebs role policy", |
| 58 | + }) |
| 59 | + } |
| 60 | + |
| 61 | + ebsTestParams.addons = addons |
| 62 | + ebsTestParams.serviceAccount = ebsSA |
| 63 | + ebsTestParams.ebsRolePolicy = EBSCSIRole |
| 64 | + |
| 65 | + r := validateEbsCsiDrivers(ebsTestParams) |
| 66 | + results = append(results, r...) |
| 67 | + |
| 68 | + return results, nil |
| 69 | +} |
| 70 | + |
| 71 | +func validateEbsCsiDrivers(testers EbsTestObjects) (result []validate.Result) { |
| 72 | + for _, addon := range testers.addons { |
| 73 | + if addon == "aws-ebs-csi-driver" { |
| 74 | + result = append(result, validate.Result{ |
| 75 | + Status: validate.Success, |
| 76 | + Message: "EKS: ebs-csi driver validated", |
| 77 | + }) |
| 78 | + } else { |
| 79 | + result = append(result, validate.Result{ |
| 80 | + Status: validate.Failure, |
| 81 | + Message: "EKS: no 'aws-ebs-csi-driver' present in addons", |
| 82 | + }) |
| 83 | + } |
| 84 | + } |
| 85 | + |
| 86 | + if testers.serviceAccount != "" { |
| 87 | + result = append(result, validate.Result{ |
| 88 | + Status: validate.Success, |
| 89 | + Message: "EKS: ebs service account validated", |
| 90 | + }) |
| 91 | + } else { |
| 92 | + result = append(result, validate.Result{ |
| 93 | + Status: validate.Failure, |
| 94 | + Message: "EKS: no 'ebs-csi-controller-sa' service account present in cluster", |
| 95 | + }) |
| 96 | + } |
| 97 | + |
| 98 | + if *testers.ebsRolePolicy.PolicyName == "AmazonEBSCSIDriverPolicy" { |
| 99 | + result = append(result, validate.Result{ |
| 100 | + Status: validate.Success, |
| 101 | + Message: "EKS: service account ebs role policy validated", |
| 102 | + }) |
| 103 | + } else { |
| 104 | + result = append(result, validate.Result{ |
| 105 | + Status: validate.Failure, |
| 106 | + Message: "EKS: no 'AmazonEBSCSIDriverPolicy' attached to role", |
| 107 | + }) |
| 108 | + } |
| 109 | + |
| 110 | + return result |
| 111 | +} |
| 112 | + |
| 113 | +// EksVpc checks if a valid vpc available |
| 114 | +func EksVpc(ctx context.Context, config *Config) ([]validate.Result, error) { |
| 115 | + var results []validate.Result |
| 116 | + if config.ec2Client == nil { |
| 117 | + results = append(results, validate.Result{ |
| 118 | + Status: validate.Failure, |
| 119 | + Message: "EKS: validate VPC failed", |
| 120 | + }) |
| 121 | + } |
| 122 | + |
| 123 | + inputs := &ec2.DescribeVpcsInput{} |
| 124 | + outputs, err := config.ec2Client.DescribeVpcs(ctx, inputs) |
| 125 | + |
| 126 | + if err != nil { |
| 127 | + results = append(results, validate.Result{ |
| 128 | + Status: validate.Failure, |
| 129 | + Message: "EKS: Validate VPC failed", |
| 130 | + }) |
| 131 | + return results, nil |
| 132 | + } |
| 133 | + |
| 134 | + if len(outputs.Vpcs) == 0 { |
| 135 | + results = append(results, validate.Result{ |
| 136 | + Status: validate.Failure, |
| 137 | + Message: "EKS: Validate VPC failed: No VPC configured", |
| 138 | + }) |
| 139 | + return results, nil |
| 140 | + } |
| 141 | + |
| 142 | + for _, vpc := range outputs.Vpcs { |
| 143 | + r := validateVpc(&vpc) |
| 144 | + results = append(results, r...) |
| 145 | + } |
| 146 | + |
| 147 | + return results, nil |
| 148 | +} |
| 149 | + |
| 150 | +func validateVpc(vpc *types.Vpc) (result []validate.Result) { |
| 151 | + state := vpc.State |
| 152 | + |
| 153 | + if state == "available" { |
| 154 | + result = append(result, validate.Result{ |
| 155 | + Status: validate.Success, |
| 156 | + Message: "VPC is validated", |
| 157 | + }) |
| 158 | + return result |
| 159 | + } |
| 160 | + |
| 161 | + result = append(result, validate.Result{ |
| 162 | + Status: validate.Failure, |
| 163 | + Message: "vpc.State stuck in pending state", |
| 164 | + }) |
| 165 | + |
| 166 | + return result |
| 167 | +} |
| 168 | + |
| 169 | +// checks if current context is set to EKS cluster |
| 170 | +func CurrentContextSetToEKSCluster() error { |
| 171 | + home := homedir.HomeDir() |
| 172 | + pathToKubeConfig := filepath.Join(home, ".kube", "config") |
| 173 | + |
| 174 | + config, err := clientcmd.NewNonInteractiveDeferredLoadingClientConfig( |
| 175 | + &clientcmd.ClientConfigLoadingRules{ExplicitPath: pathToKubeConfig}, |
| 176 | + &clientcmd.ConfigOverrides{ |
| 177 | + CurrentContext: "", |
| 178 | + }).RawConfig() |
| 179 | + |
| 180 | + if err != nil { |
| 181 | + return err |
| 182 | + } |
| 183 | + |
| 184 | + got := strings.Split(config.CurrentContext, ":") |
| 185 | + want := []string{"arn", "aws", "eks"} |
| 186 | + |
| 187 | + if len(got) >= 3 { |
| 188 | + got = got[:3] |
| 189 | + if reflect.DeepEqual(got, want) { |
| 190 | + return nil |
| 191 | + } |
| 192 | + } |
| 193 | + |
| 194 | + return errors.Newf("%s no eks cluster configured", validate.FailureEmoji) |
| 195 | +} |
| 196 | + |
| 197 | +func getAddons(ctx context.Context, client *eks.Client) ([]string, error) { |
| 198 | + clusterName := getClusterName(ctx, client) |
| 199 | + inputs := &eks.ListAddonsInput{ClusterName: clusterName} |
| 200 | + outputs, err := client.ListAddons(ctx, inputs) |
| 201 | + |
| 202 | + if err != nil { |
| 203 | + return nil, err |
| 204 | + } |
| 205 | + |
| 206 | + return outputs.Addons, nil |
| 207 | +} |
| 208 | + |
| 209 | +func getEbsSA(ctx context.Context, client *kubernetes.Clientset) (string, error) { |
| 210 | + serviceAccounts := client.CoreV1().ServiceAccounts("kube-system") |
| 211 | + ebsSA, err := serviceAccounts.Get( |
| 212 | + ctx, |
| 213 | + "ebs-csi-controller-sa", |
| 214 | + metav1.GetOptions{}, |
| 215 | + ) |
| 216 | + |
| 217 | + if err != nil { |
| 218 | + return "", err |
| 219 | + } |
| 220 | + |
| 221 | + annotations := ebsSA.GetAnnotations() |
| 222 | + roleArn := strings.Split(annotations["eks.amazonaws.com/role-arn"], "/") |
| 223 | + ebsControllerSA := roleArn[len(roleArn)-1] |
| 224 | + |
| 225 | + return ebsControllerSA, nil |
| 226 | +} |
| 227 | + |
| 228 | +type RolePolicy struct { |
| 229 | + PolicyName *string |
| 230 | + PolicyArn *string |
| 231 | +} |
| 232 | + |
| 233 | +func getEBSCSIRole(ctx context.Context, client *iam.Client, SAName string) (RolePolicy, error) { |
| 234 | + inputs := iam.ListAttachedRolePoliciesInput{RoleName: &SAName} |
| 235 | + outputs, err := client.ListAttachedRolePolicies(ctx, &inputs) |
| 236 | + |
| 237 | + if err != nil { |
| 238 | + return RolePolicy{}, err |
| 239 | + } |
| 240 | + |
| 241 | + var policyName *string |
| 242 | + for _, policy := range outputs.AttachedPolicies { |
| 243 | + policyName = policy.PolicyName |
| 244 | + if *policyName == "AmazonEBSCSIDriverPolicy" { |
| 245 | + return RolePolicy{ |
| 246 | + PolicyName: policy.PolicyName, |
| 247 | + PolicyArn: policy.PolicyArn, |
| 248 | + }, nil |
| 249 | + } |
| 250 | + } |
| 251 | + |
| 252 | + return RolePolicy{}, nil |
| 253 | +} |
| 254 | + |
| 255 | +func getClusterName(ctx context.Context, client *eks.Client) *string { |
| 256 | + home := homedir.HomeDir() |
| 257 | + pathToKubeConfig := filepath.Join(home, ".kube", "config") |
| 258 | + |
| 259 | + config, err := clientcmd.NewNonInteractiveDeferredLoadingClientConfig( |
| 260 | + &clientcmd.ClientConfigLoadingRules{ExplicitPath: pathToKubeConfig}, |
| 261 | + &clientcmd.ConfigOverrides{ |
| 262 | + CurrentContext: "", |
| 263 | + }).RawConfig() |
| 264 | + |
| 265 | + if err != nil { |
| 266 | + fmt.Printf("error while checking current context: %s\n", err) |
| 267 | + return nil |
| 268 | + } |
| 269 | + |
| 270 | + currentContext := strings.Split(config.CurrentContext, "/") |
| 271 | + clusterName := currentContext[len(currentContext)-1] |
| 272 | + return &clusterName |
| 273 | +} |
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