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destroy_iam.go
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destroy_iam.go
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package aws
import (
"context"
"fmt"
"strings"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/iam"
"github.com/aws/aws-sdk-go/service/iam/iamiface"
"github.com/go-logr/logr"
"github.com/spf13/cobra"
"k8s.io/apimachinery/pkg/util/wait"
awsutil "github.com/openshift/hypershift/cmd/infra/aws/util"
"github.com/openshift/hypershift/cmd/log"
"github.com/openshift/hypershift/cmd/util"
)
type DestroyIAMOptions struct {
Region string
AWSCredentialsOpts awsutil.AWSCredentialsOptions
InfraID string
Log logr.Logger
CredentialsSecretData *util.CredentialsSecretData
}
func NewDestroyIAMCommand() *cobra.Command {
cmd := &cobra.Command{
Use: "aws",
Short: "Destroys AWS instance profile for workers",
SilenceUsage: true,
}
opts := DestroyIAMOptions{
Region: "us-east-1",
InfraID: "",
Log: log.Log,
}
cmd.Flags().StringVar(&opts.InfraID, "infra-id", opts.InfraID, "Infrastructure ID to use for AWS resources.")
cmd.Flags().StringVar(&opts.Region, "region", opts.Region, "Region where cluster infra lives")
opts.AWSCredentialsOpts.BindFlags(cmd.Flags())
cmd.MarkFlagRequired("infra-id")
cmd.RunE = func(cmd *cobra.Command, args []string) error {
err := opts.AWSCredentialsOpts.Validate()
if err != nil {
return err
}
if err := opts.DestroyIAM(cmd.Context()); err != nil {
return err
}
opts.Log.Info("Successfully destroyed IAM infra")
return nil
}
return cmd
}
func (o *DestroyIAMOptions) Run(ctx context.Context) error {
return wait.PollImmediateUntil(5*time.Second, func() (bool, error) {
err := o.DestroyIAM(ctx)
if err != nil {
if !awsutil.IsErrorRetryable(err) {
return false, err
}
o.Log.Info("WARNING: error during destroy, will retry", "error", err.Error())
return false, nil
}
return true, nil
}, ctx.Done())
}
func (o *DestroyIAMOptions) DestroyIAM(ctx context.Context) error {
awsSession, err := o.AWSCredentialsOpts.GetSession("cli-destroy-iam", o.CredentialsSecretData, o.Region)
if err != nil {
return err
}
awsConfig := awsutil.NewConfig()
iamClient := iam.New(awsSession, awsConfig)
err = o.DestroyOIDCResources(ctx, iamClient)
if err != nil {
return err
}
err = o.DestroyWorkerInstanceProfile(iamClient)
if err != nil {
return err
}
return nil
}
func (o *DestroyIAMOptions) DestroyOIDCResources(ctx context.Context, iamClient iamiface.IAMAPI) error {
oidcProviderList, err := iamClient.ListOpenIDConnectProviders(&iam.ListOpenIDConnectProvidersInput{})
if err != nil {
return err
}
for _, provider := range oidcProviderList.OpenIDConnectProviderList {
if strings.Contains(*provider.Arn, o.InfraID) {
_, err := iamClient.DeleteOpenIDConnectProvider(&iam.DeleteOpenIDConnectProviderInput{
OpenIDConnectProviderArn: provider.Arn,
})
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
if aerr.Code() != iam.ErrCodeNoSuchEntityException {
o.Log.Error(aerr, "Error deleting OIDC provider", "providerARN", provider.Arn)
return aerr
}
} else {
o.Log.Error(err, "Error deleting OIDC provider", "providerARN", provider.Arn)
return err
}
} else {
o.Log.Info("Deleted OIDC provider", "providerARN", provider.Arn)
}
break
}
}
if err = o.DestroyOIDCRole(iamClient, "openshift-ingress"); err != nil {
return err
}
if err = o.DestroyOIDCRole(iamClient, "openshift-image-registry"); err != nil {
return err
}
if err = o.DestroyOIDCRole(iamClient, "aws-ebs-csi-driver-controller"); err != nil {
return err
}
if err = o.DestroyOIDCRole(iamClient, "cloud-controller"); err != nil {
return err
}
if err = o.DestroyOIDCRole(iamClient, "node-pool"); err != nil {
return err
}
if err = o.DestroyOIDCRole(iamClient, "control-plane-operator"); err != nil {
return err
}
if err := o.DestroyOIDCRole(iamClient, "cloud-network-config-controller"); err != nil {
return err
}
if err := o.DestroyOIDCRole(iamClient, "kms-provider"); err != nil {
return err
}
return nil
}
// CreateOIDCRole create an IAM Role with a trust policy for the OIDC provider
func (o *DestroyIAMOptions) DestroyOIDCRole(client iamiface.IAMAPI, name string) error {
roleName := fmt.Sprintf("%s-%s", o.InfraID, name)
_, err := client.DeleteRolePolicy(&iam.DeleteRolePolicyInput{
PolicyName: aws.String(roleName),
RoleName: aws.String(roleName),
})
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
if aerr.Code() != iam.ErrCodeNoSuchEntityException {
o.Log.Error(aerr, "Error deleting role policy", "role", roleName)
return aerr
}
} else {
o.Log.Error(err, "Error deleting role policy", "role", roleName)
return err
}
} else {
o.Log.Info("Deleted role policy", "role", roleName)
}
_, err = client.DeleteRole(&iam.DeleteRoleInput{
RoleName: aws.String(roleName),
})
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
if aerr.Code() != iam.ErrCodeNoSuchEntityException {
o.Log.Error(aerr, "Error deleting role", "role", roleName)
return aerr
}
} else {
o.Log.Error(err, "Error deleting role", "role", roleName)
return err
}
} else {
o.Log.Info("Deleted role", "role", roleName)
}
return nil
}
func (o *DestroyIAMOptions) DestroyWorkerInstanceProfile(client iamiface.IAMAPI) error {
profileName := DefaultProfileName(o.InfraID)
instanceProfile, err := existingInstanceProfile(client, profileName)
if err != nil {
return fmt.Errorf("cannot check for existing instance profile: %w", err)
}
if instanceProfile != nil {
for _, role := range instanceProfile.Roles {
_, err := client.RemoveRoleFromInstanceProfile(&iam.RemoveRoleFromInstanceProfileInput{
InstanceProfileName: aws.String(profileName),
RoleName: role.RoleName,
})
if err != nil {
return fmt.Errorf("cannot remove role %s from instance profile %s: %w", aws.StringValue(role.RoleName), profileName, err)
}
o.Log.Info("Removed role from instance profile", "profile", profileName, "role", aws.StringValue(role.RoleName))
}
_, err := client.DeleteInstanceProfile(&iam.DeleteInstanceProfileInput{
InstanceProfileName: aws.String(profileName),
})
if err != nil {
return fmt.Errorf("cannot delete instance profile %s: %w", profileName, err)
}
o.Log.Info("Deleted instance profile", "profile", profileName)
}
roleName := fmt.Sprintf("%s-role", profileName)
policyName := fmt.Sprintf("%s-policy", profileName)
role, err := existingRole(client, roleName)
if err != nil {
return fmt.Errorf("cannot check for existing role: %w", err)
}
if role != nil {
hasPolicy, err := existingRolePolicy(client, roleName, policyName)
if err != nil {
return fmt.Errorf("cannot check for existing role policy: %w", err)
}
if hasPolicy {
_, err := client.DeleteRolePolicy(&iam.DeleteRolePolicyInput{
PolicyName: aws.String(policyName),
RoleName: aws.String(roleName),
})
if err != nil {
return fmt.Errorf("cannot delete role policy %s from role %s: %w", policyName, roleName, err)
}
o.Log.Info("Deleted role policy", "role", roleName, "policy", policyName)
}
_, err = client.DeleteRole(&iam.DeleteRoleInput{
RoleName: aws.String(roleName),
})
if err != nil {
return fmt.Errorf("cannot delete role %s: %w", roleName, err)
}
o.Log.Info("Deleted role", "role", roleName)
}
return nil
}