/
irsa.go
1182 lines (1081 loc) · 36.3 KB
/
irsa.go
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// Package irsa implements tester for IAM Roles for Service Accounts (IRSA).
package irsa
import (
"bytes"
"context"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"reflect"
"strings"
"text/template"
"time"
eks_tester "github.com/aws/aws-k8s-tester/eks/tester"
"github.com/aws/aws-k8s-tester/eksconfig"
"github.com/aws/aws-k8s-tester/pkg/aws/cfn"
aws_ecr "github.com/aws/aws-k8s-tester/pkg/aws/ecr"
aws_s3 "github.com/aws/aws-k8s-tester/pkg/aws/s3"
k8s_client "github.com/aws/aws-k8s-tester/pkg/k8s-client"
"github.com/aws/aws-k8s-tester/pkg/randutil"
"github.com/aws/aws-k8s-tester/pkg/timeutil"
"github.com/aws/aws-k8s-tester/pkg/user"
"github.com/aws/aws-k8s-tester/version"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/service/cloudformation"
"github.com/aws/aws-sdk-go/service/cloudformation/cloudformationiface"
"github.com/aws/aws-sdk-go/service/ecr/ecriface"
"github.com/aws/aws-sdk-go/service/iam"
"github.com/aws/aws-sdk-go/service/iam/iamiface"
"github.com/aws/aws-sdk-go/service/s3/s3iface"
"go.uber.org/zap"
apps_v1 "k8s.io/api/apps/v1"
v1 "k8s.io/api/core/v1"
apierrs "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/utils/exec"
)
// Config defines "IAM Roles for Service Accounts (IRSA)" configuration.
// ref. https://aws.amazon.com/blogs/opensource/introducing-fine-grained-iam-roles-service-accounts/
type Config struct {
Logger *zap.Logger
LogWriter io.Writer
Stopc chan struct{}
EKSConfig *eksconfig.Config
K8SClient k8s_client.EKS
S3API s3iface.S3API
CFNAPI cloudformationiface.CloudFormationAPI
IAMAPI iamiface.IAMAPI
ECRAPI ecriface.ECRAPI
}
var pkgName = reflect.TypeOf(tester{}).PkgPath()
func (ts *tester) Name() string { return pkgName }
// New creates a new Job tester.
func New(cfg Config) eks_tester.Tester {
cfg.Logger.Info("creating tester", zap.String("tester", pkgName))
return &tester{cfg: cfg}
}
type tester struct {
cfg Config
ecrImage string
deploymentCreated time.Time
sleepMessage string
testBody string
}
func (ts *tester) Create() (err error) {
if !ts.cfg.EKSConfig.IsEnabledAddOnIRSA() {
ts.cfg.Logger.Info("skipping tester.Create", zap.String("tester", pkgName))
return nil
}
if ts.cfg.EKSConfig.AddOnIRSA.Created {
ts.cfg.Logger.Info("skipping tester.Create", zap.String("tester", pkgName))
return nil
}
ts.cfg.Logger.Info("starting tester.Create", zap.String("tester", pkgName))
ts.cfg.EKSConfig.AddOnIRSA.Created = true
ts.cfg.EKSConfig.Sync()
createStart := time.Now()
defer func() {
createEnd := time.Now()
ts.cfg.EKSConfig.AddOnIRSA.TimeFrameCreate = timeutil.NewTimeFrame(createStart, createEnd)
ts.cfg.EKSConfig.Sync()
}()
if ts.ecrImage, _, err = aws_ecr.Check(
ts.cfg.Logger,
ts.cfg.ECRAPI,
ts.cfg.EKSConfig.Partition,
ts.cfg.EKSConfig.AddOnIRSA.RepositoryAccountID,
ts.cfg.EKSConfig.AddOnIRSA.RepositoryRegion,
ts.cfg.EKSConfig.AddOnIRSA.RepositoryName,
ts.cfg.EKSConfig.AddOnIRSA.RepositoryImageTag,
); err != nil {
return err
}
if err = k8s_client.CreateNamespace(
ts.cfg.Logger,
ts.cfg.K8SClient.KubernetesClientSet(),
ts.cfg.EKSConfig.AddOnIRSA.Namespace,
); err != nil {
return err
}
if err = ts.createS3Object(); err != nil {
return err
}
if err = ts.createOIDCProvider(); err != nil {
return err
}
if err = ts.createRole(); err != nil {
return err
}
if err = ts.createServiceAccount(); err != nil {
return err
}
if err = ts.createConfigMap(); err != nil {
return err
}
if err = ts.createDeployment(); err != nil {
return err
}
if err = ts.waitDeployment(); err != nil {
return err
}
if err = ts.checkPodWebhook(); err != nil {
return err
}
if err = ts.checkResults(); err != nil {
return err
}
ts.cfg.EKSConfig.AddOnIRSA.DeploymentTook = time.Since(ts.deploymentCreated)
ts.cfg.EKSConfig.AddOnIRSA.DeploymentTookString = ts.cfg.EKSConfig.AddOnIRSA.DeploymentTook.String()
ts.cfg.EKSConfig.Sync()
return nil
}
func (ts *tester) Delete() error {
if !ts.cfg.EKSConfig.IsEnabledAddOnIRSA() {
ts.cfg.Logger.Info("skipping tester.Delete", zap.String("tester", pkgName))
return nil
}
if !ts.cfg.EKSConfig.AddOnIRSA.Created {
ts.cfg.Logger.Info("skipping tester.Delete", zap.String("tester", pkgName))
return nil
}
ts.cfg.Logger.Info("starting tester.Delete", zap.String("tester", pkgName))
deleteStart := time.Now()
defer func() {
deleteEnd := time.Now()
ts.cfg.EKSConfig.AddOnIRSA.TimeFrameDelete = timeutil.NewTimeFrame(deleteStart, deleteEnd)
ts.cfg.EKSConfig.Sync()
}()
var errs []string
if err := ts.deleteDeployment(); err != nil {
errs = append(errs, fmt.Sprintf("failed to delete Deployments (%v)", err))
}
time.Sleep(2 * time.Minute)
if err := ts.deleteConfigMaps(); err != nil {
errs = append(errs, fmt.Sprintf("failed to delete ConfigMap (%v)", err))
}
ts.cfg.Logger.Info("wait after deleting ConfigMap")
time.Sleep(20 * time.Second)
if err := ts.deleteServiceAccount(); err != nil {
errs = append(errs, fmt.Sprintf("failed to delete ServiceAccount (%v)", err))
}
ts.cfg.Logger.Info("wait after deleting ServiceAccount")
time.Sleep(20 * time.Second)
if err := ts.deleteRole(); err != nil {
errs = append(errs, fmt.Sprintf("failed to delete IAM Role (%v)", err))
}
ts.cfg.Logger.Info("wait after deleting IAM Role")
time.Sleep(20 * time.Second)
if err := ts.deleteOIDCProvider(); err != nil {
errs = append(errs, fmt.Sprintf("failed to delete IAM Open ID Connect provider (%v)", err))
}
ts.cfg.Logger.Info("wait for a minute after deleting OIDC provider")
time.Sleep(time.Minute)
if err := k8s_client.DeleteNamespaceAndWait(
ts.cfg.Logger,
ts.cfg.K8SClient.KubernetesClientSet(),
ts.cfg.EKSConfig.AddOnIRSA.Namespace,
k8s_client.DefaultNamespaceDeletionInterval,
k8s_client.DefaultNamespaceDeletionTimeout,
k8s_client.WithForceDelete(true),
); err != nil {
errs = append(errs, fmt.Sprintf("failed to delete IRSA namespace (%v)", err))
}
if len(errs) > 0 {
return errors.New(strings.Join(errs, ", "))
}
ts.cfg.EKSConfig.AddOnIRSA.Created = false
ts.cfg.EKSConfig.Sync()
return nil
}
func (ts *tester) createS3Object() (err error) {
if ts.cfg.EKSConfig.S3.BucketName == "" {
return errors.New("empty S3 bucket name for IRSA add-on")
}
ts.testBody = randutil.String(256)
ts.sleepMessage = `SUCCESS IRSA TEST: SLEEPING WITH ` + randutil.String(32)
return aws_s3.UploadBody(
ts.cfg.Logger,
ts.cfg.S3API,
ts.cfg.EKSConfig.S3.BucketName,
ts.cfg.EKSConfig.AddOnIRSA.S3Key,
strings.NewReader(ts.testBody),
)
}
func (ts *tester) createOIDCProvider() error {
if ts.cfg.EKSConfig.Name == "" {
return errors.New("EKSConfig.Name is empty")
}
if ts.cfg.EKSConfig.Status.ClusterOIDCIssuerURL == "" {
return errors.New("EKSConfig.Status.ClusterOIDCIssuerURL is empty")
}
ts.cfg.Logger.Info("checking existing IAM Open ID Connect provider",
zap.String("provider-arn", ts.cfg.EKSConfig.Status.ClusterOIDCIssuerARN),
)
needCreate := false
_, err := ts.cfg.IAMAPI.GetOpenIDConnectProvider(&iam.GetOpenIDConnectProviderInput{
OpenIDConnectProviderArn: aws.String(ts.cfg.EKSConfig.Status.ClusterOIDCIssuerARN),
})
if err != nil {
arr := err.(awserr.Error)
if arr.Code() == iam.ErrCodeNoSuchEntityException {
needCreate = true
} else {
ts.cfg.Logger.Warn("failed to get IAM Open ID Connect provider", zap.Error(err))
}
} else {
ts.cfg.Logger.Info("IAM Open ID Connect provider already exists",
zap.String("provider-arn", ts.cfg.EKSConfig.Status.ClusterOIDCIssuerARN),
)
}
if needCreate {
ts.cfg.Logger.Info("creating IAM Open ID Connect provider")
output, err := ts.cfg.IAMAPI.CreateOpenIDConnectProvider(&iam.CreateOpenIDConnectProviderInput{ // no name or tags, keyed to URL
Url: aws.String(ts.cfg.EKSConfig.Status.ClusterOIDCIssuerURL),
ThumbprintList: aws.StringSlice([]string{ts.cfg.EKSConfig.Status.ClusterOIDCIssuerCAThumbprint}),
ClientIDList: aws.StringSlice([]string{"sts.amazonaws.com"}),
})
if err != nil {
return err
}
ts.cfg.EKSConfig.Status.ClusterOIDCIssuerARN = aws.StringValue(output.OpenIDConnectProviderArn)
ts.cfg.EKSConfig.Sync()
ts.cfg.Logger.Info("created IAM Open ID Connect provider", zap.String("provider-arn", ts.cfg.EKSConfig.Status.ClusterOIDCIssuerARN))
}
ts.cfg.EKSConfig.Sync()
return nil
}
func (ts *tester) deleteOIDCProvider() error {
ts.cfg.Logger.Info("deleting IAM Open ID Connect provider",
zap.String("provider-arn", ts.cfg.EKSConfig.Status.ClusterOIDCIssuerARN),
)
_, err := ts.cfg.IAMAPI.DeleteOpenIDConnectProvider(&iam.DeleteOpenIDConnectProviderInput{
OpenIDConnectProviderArn: aws.String(ts.cfg.EKSConfig.Status.ClusterOIDCIssuerARN),
})
if err != nil {
arr := err.(awserr.Error)
if arr.Code() == iam.ErrCodeNoSuchEntityException {
ts.cfg.Logger.Warn("IAM Open ID Connect provider already deleted", zap.Error(err))
} else {
ts.cfg.Logger.Warn("failed to delete IAM Open ID Connect provider", zap.Error(err))
}
} else {
ts.cfg.Logger.Info("deleted IAM Open ID Connect provider",
zap.String("provider-arn", ts.cfg.EKSConfig.Status.ClusterOIDCIssuerARN),
)
}
ts.cfg.EKSConfig.Sync()
return nil
}
// TemplateRole is the CloudFormation template for EKS IRSA role.
const TemplateRole = `
---
AWSTemplateFormatVersion: '2010-09-09'
Description: 'Amazon EKS Cluster IRSA Role'
Parameters:
RoleName:
Type: String
Description: The name of the IRSA role
IssuerARN:
Type: String
Description: EKS IRSA Provider ARN
Namespace:
Type: String
Description: The namespace for the IRSA role
ServiceAccountName:
Type: String
Description: The ServiceAccount name for the IRSA role
Resources:
IRSARole:
Type: AWS::IAM::Role
Properties:
RoleName: !Ref RoleName
AssumeRolePolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Principal:
Federated: !Ref IssuerARN
Action:
- sts:AssumeRoleWithWebIdentity
Condition:
StringEquals:
{{ .IRSAIssuerHostPath }}:sub: !Join [':', ['system:serviceaccount', !Ref Namespace, !Ref ServiceAccountName]]
Policies:
- PolicyName: !Join ['-', [!Ref RoleName, 's3-policy']]
PolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Action:
- s3:ListBucket
- s3:GetObject
Resource:
- !Join ['', [!Sub 'arn:${AWS::Partition}:s3:::', '{{.S3BucketName}}']]
- !Join ['', [!Sub 'arn:${AWS::Partition}:s3:::', '{{.S3BucketName}}', '/', '{{.ClusterName}}', '/*']]
Outputs:
IRSARoleARN:
Description: The IRSA role ARN
Value: !GetAtt IRSARole.Arn
`
type irsaTemplate struct {
IRSAIssuerHostPath string
S3BucketName string
ClusterName string
}
func (ts *tester) createRole() error {
if ts.cfg.EKSConfig.AddOnIRSA.RoleName == "" {
return errors.New("empty AddOnIRSA.RoleName")
}
if ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackID != "" ||
ts.cfg.EKSConfig.AddOnIRSA.RoleARN != "" {
ts.cfg.Logger.Info("non-empty roleARN given; no need to create a new one")
return nil
}
tpl := template.Must(template.New("TemplateRole").Parse(TemplateRole))
buf := bytes.NewBuffer(nil)
if err := tpl.Execute(buf, irsaTemplate{
IRSAIssuerHostPath: ts.cfg.EKSConfig.Status.ClusterOIDCIssuerHostPath,
S3BucketName: ts.cfg.EKSConfig.S3.BucketName,
ClusterName: ts.cfg.EKSConfig.Name,
}); err != nil {
return err
}
// grant write permission in case of overwrites
if err := ioutil.WriteFile(ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackYAMLPath, buf.Bytes(), 0600); err != nil {
return err
}
if err := aws_s3.Upload(
ts.cfg.Logger,
ts.cfg.S3API,
ts.cfg.EKSConfig.S3.BucketName,
ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackYAMLS3Key,
ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackYAMLPath,
); err != nil {
return err
}
ts.cfg.Logger.Info("creating a new IRSA role using CFN",
zap.String("role-name", ts.cfg.EKSConfig.AddOnIRSA.RoleName),
zap.String("role-cfn-file-path", ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackYAMLPath),
)
stackInput := &cloudformation.CreateStackInput{
StackName: aws.String(ts.cfg.EKSConfig.AddOnIRSA.RoleName),
Capabilities: aws.StringSlice([]string{"CAPABILITY_NAMED_IAM"}),
OnFailure: aws.String(cloudformation.OnFailureDelete),
TemplateBody: aws.String(buf.String()),
Tags: cfn.NewTags(map[string]string{
"Kind": "aws-k8s-tester",
"Name": ts.cfg.EKSConfig.Name,
"aws-k8s-tester-version": version.ReleaseVersion,
"User": user.Get(),
}),
Parameters: []*cloudformation.Parameter{
{
ParameterKey: aws.String("RoleName"),
ParameterValue: aws.String(ts.cfg.EKSConfig.AddOnIRSA.RoleName),
},
{
ParameterKey: aws.String("IssuerARN"),
ParameterValue: aws.String(ts.cfg.EKSConfig.Status.ClusterOIDCIssuerARN),
},
{
ParameterKey: aws.String("Namespace"),
ParameterValue: aws.String(ts.cfg.EKSConfig.AddOnIRSA.Namespace),
},
{
ParameterKey: aws.String("ServiceAccountName"),
ParameterValue: aws.String(irsaServiceAccountName),
},
},
}
stackOutput, err := ts.cfg.CFNAPI.CreateStack(stackInput)
if err != nil {
return err
}
ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackID = aws.StringValue(stackOutput.StackId)
ctx, cancel := context.WithTimeout(context.Background(), 15*time.Minute)
ch := cfn.Poll(
ctx,
ts.cfg.Stopc,
ts.cfg.Logger,
ts.cfg.LogWriter,
ts.cfg.CFNAPI,
ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackID,
cloudformation.ResourceStatusCreateComplete,
time.Minute,
10*time.Second,
)
var st cfn.StackStatus
for st = range ch {
if st.Error != nil {
cancel()
ts.cfg.EKSConfig.RecordStatus(fmt.Sprintf("failed to create IRSA role (%v)", st.Error))
return st.Error
}
}
cancel()
for _, o := range st.Stack.Outputs {
switch k := aws.StringValue(o.OutputKey); k {
case "IRSARoleARN":
ts.cfg.EKSConfig.AddOnIRSA.RoleARN = aws.StringValue(o.OutputValue)
default:
return fmt.Errorf("unexpected OutputKey %q from %q", k, ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackID)
}
}
ts.cfg.Logger.Info("created a IRSA role",
zap.String("cfn-stack-id", ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackID),
zap.String("role-name", ts.cfg.EKSConfig.AddOnIRSA.RoleName),
zap.String("role-arn", ts.cfg.EKSConfig.AddOnIRSA.RoleARN),
)
ts.cfg.EKSConfig.Sync()
return nil
}
func (ts *tester) deleteRole() error {
if ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackID == "" {
ts.cfg.Logger.Info("empty IRSA role CFN stack ID; no need to delete IRSA")
return nil
}
ts.cfg.Logger.Info("deleting IRSA role CFN stack",
zap.String("role-cfn-stack-id", ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackID),
)
_, err := ts.cfg.CFNAPI.DeleteStack(&cloudformation.DeleteStackInput{
StackName: aws.String(ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackID),
})
if err != nil {
return err
}
ctx, cancel := context.WithTimeout(context.Background(), 15*time.Minute)
ch := cfn.Poll(
ctx,
make(chan struct{}), // do not exit on stop
ts.cfg.Logger,
ts.cfg.LogWriter,
ts.cfg.CFNAPI,
ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackID,
cloudformation.ResourceStatusDeleteComplete,
time.Minute,
10*time.Second,
)
var st cfn.StackStatus
for st = range ch {
if st.Error != nil {
cancel()
ts.cfg.EKSConfig.RecordStatus(fmt.Sprintf("failed to delete IRSA role (%v)", st.Error))
return st.Error
}
}
cancel()
ts.cfg.Logger.Info("deleted a IRSA role",
zap.String("role-cfn-stack-id", ts.cfg.EKSConfig.AddOnIRSA.RoleCFNStackID),
)
ts.cfg.EKSConfig.Sync()
return nil
}
const (
irsaServiceAccountName = "irsa-service-account"
irsaConfigMapName = "irsa-configmap"
irsaConfigMapFileName = "irsa-configmap.bash"
irsaDeploymentName = "irsa-deployment"
irsaAppName = "irsa-app"
)
func (ts *tester) createServiceAccount() error {
ts.cfg.Logger.Info("creating service account", zap.String("name", irsaServiceAccountName))
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
_, err := ts.cfg.K8SClient.KubernetesClientSet().
CoreV1().
ServiceAccounts(ts.cfg.EKSConfig.AddOnIRSA.Namespace).
Create(
ctx,
&v1.ServiceAccount{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "ServiceAccount",
},
ObjectMeta: metav1.ObjectMeta{
Name: irsaServiceAccountName,
Namespace: ts.cfg.EKSConfig.AddOnIRSA.Namespace,
Labels: map[string]string{
"name": irsaServiceAccountName,
},
Annotations: map[string]string{
"eks.amazonaws.com/role-arn": ts.cfg.EKSConfig.AddOnIRSA.RoleARN,
},
},
},
metav1.CreateOptions{},
)
cancel()
if err != nil {
return err
}
ts.cfg.Logger.Info("created service account", zap.String("name", irsaServiceAccountName))
ts.cfg.EKSConfig.Sync()
return nil
}
func (ts *tester) deleteServiceAccount() error {
ts.cfg.Logger.Info("deleting service account", zap.String("name", irsaServiceAccountName))
foreground := metav1.DeletePropagationForeground
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
err := ts.cfg.K8SClient.KubernetesClientSet().
CoreV1().
ServiceAccounts(ts.cfg.EKSConfig.AddOnIRSA.Namespace).
Delete(
ctx,
irsaServiceAccountName,
metav1.DeleteOptions{
GracePeriodSeconds: aws.Int64(0),
PropagationPolicy: &foreground,
},
)
cancel()
if err != nil {
return err
}
ts.cfg.Logger.Info("deleted service account", zap.String("name", irsaServiceAccountName))
ts.cfg.EKSConfig.Sync()
return nil
}
// TemplateConfigMap is the IRSA config map.
// Do not download to the same file paths.
// e.g. download failed: s3://aws-k8s-tester-eks-s3-bucket/eks-2020062621-misty8up27dz/irsa-s3-key to var/log/output-configmap.log [Errno 16] Device or resource busy: '/var/log/output-configmap.log.75Caa245' -> '/var/log/output-configmap.log'
// ${HOSTNAME} is same as Pod name, writes "/var/log/[POD_NAME].s3.output"
const TemplateConfigMap = `
#!/usr/bin/env bash
set -e
printf "\n"
aws --version
/s3-utils version
/sts-utils version
printf "\nhttp://169.254.169.254/latest/meta-data/ami-id with IMDBv1:\n"
curl -v http://169.254.169.254/latest/meta-data/ami-id || true
printf "\n\nProjected ServiceAccount token AWS_WEB_IDENTITY_TOKEN_FILE:\n"
cat $AWS_WEB_IDENTITY_TOKEN_FILE; echo
printf "\nHOSTNAME:\n"
echo $HOSTNAME
printf "\nAWS_ROLE_ARN:\n"
echo $AWS_ROLE_ARN
printf "\n'sts-utils get-caller-identity' output:\n"
/sts-utils get-caller-identity --log-level debug --partition {{.Partition}} --region {{.Region}} || true
# printf "\n'aws s3 cp':\n"
# aws s3 cp s3://{{ .S3BucketName }}/{{ .S3Key }} /var/log/$HOSTNAME.s3.output;
printf "\n's3-utils cp':\n"
/s3-utils cp --log-level info --partition {{.Partition}} --region {{.Region}} --s3-bucket {{ .S3BucketName }} --s3-key {{ .S3Key }} --local-path /var/log/$HOSTNAME.s3.output --timeout 10s;
printf "\n"
echo {{ .S3Key }} contents:
cat /var/log/$HOSTNAME.s3.output;
printf "\n\nSUCCESS IRSA TEST: S3 FILE DOWNLOADED!\n\n"
printf "\n'sts-utils get-caller-identity' expected role ARN:\n"
/sts-utils get-caller-identity --partition {{.Partition}} --region {{.Region}} --match-contain-role-arn {{ .RoleName }}
printf "\nSUCCESS IRSA TEST: CALLER_ROLE_ARN FOUND!\n\n"
printf "\n{{ .SleepMessage }}\n\n"
sleep 86400
printf "\nSUCCESS IRSA TEST: EXITING...\n\n"
`
/*
# https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instancedata-data-retrieval.html
printf "\nhttp://169.254.169.254/latest/meta-data/ami-id with IMDBv2:\n"
TOKEN=` + "`" + `curl -X PUT "http://169.254.169.254/latest/api/token" -H "X-aws-ec2-metadata-token-ttl-seconds: 21600"` + "`" + `\
&& curl -H "X-aws-ec2-metadata-token: $TOKEN" -v http://169.254.169.254/latest/meta-data/ami-id || true
printf "\n"
printf "\n'aws sts get-caller-identity' output:\n"
aws --debug --cli-read-timeout=5 --cli-connect-timeout=5 sts get-caller-identity || true
CALLER_ROLE_ARN=$(aws --cli-read-timeout=5 --cli-connect-timeout=5 sts get-caller-identity --query Arn --output text || true)
echo $CALLER_ROLE_ARN
if [[ $CALLER_ROLE_ARN =~ *{{ .RoleName }}* ]]; then
echo "Unexpected CALLER_ROLE_ARN: ${CALLER_ROLE_ARN}"
exit 1
fi
*/
type configMapTemplate struct {
Partition string
Region string
RoleName string
S3BucketName string
S3Key string
SleepMessage string
}
func (ts *tester) createConfigMap() error {
ts.cfg.Logger.Info("creating configmap", zap.String("name", irsaConfigMapName))
tpl := template.Must(template.New("TemplateConfigMap").Parse(TemplateConfigMap))
buf := bytes.NewBuffer(nil)
if err := tpl.Execute(buf, configMapTemplate{
Partition: ts.cfg.EKSConfig.Partition,
Region: ts.cfg.EKSConfig.Region,
// e.g.
// created role ARN: arn:aws:iam::607362164682:role/eks-2020071200-galaxyzejwho-add-on-irsa-role
// sts caller role ARN: arn:aws:sts::607362164682:assumed-role/eks-2020071200-galaxyzejwho-add-on-irsa-role/botocore-session-1594541343
RoleName: ts.cfg.EKSConfig.AddOnIRSA.RoleName,
S3BucketName: ts.cfg.EKSConfig.S3.BucketName,
S3Key: ts.cfg.EKSConfig.AddOnIRSA.S3Key,
SleepMessage: ts.sleepMessage,
}); err != nil {
return err
}
tplTxt := buf.String()
fmt.Fprintf(ts.cfg.LogWriter, "\nAddOnIRSA ConfigMap:\n%s\n\n", tplTxt)
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
_, err := ts.cfg.K8SClient.KubernetesClientSet().
CoreV1().
ConfigMaps(ts.cfg.EKSConfig.AddOnIRSA.Namespace).
Create(
ctx,
&v1.ConfigMap{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "ConfigMap",
},
ObjectMeta: metav1.ObjectMeta{
Name: irsaConfigMapName,
Namespace: ts.cfg.EKSConfig.AddOnIRSA.Namespace,
Labels: map[string]string{
"name": irsaConfigMapName,
},
},
Data: map[string]string{
irsaConfigMapFileName: tplTxt,
},
},
metav1.CreateOptions{},
)
cancel()
if err != nil {
return err
}
ts.cfg.Logger.Info("created configmap", zap.String("name", irsaConfigMapName))
ts.cfg.EKSConfig.Sync()
return nil
}
func (ts *tester) deleteConfigMaps() error {
ts.cfg.Logger.Info("deleting configmap", zap.String("name", irsaConfigMapName))
foreground := metav1.DeletePropagationForeground
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
err := ts.cfg.K8SClient.KubernetesClientSet().
CoreV1().
ConfigMaps(ts.cfg.EKSConfig.AddOnIRSA.Namespace).
Delete(
ctx,
irsaConfigMapName,
metav1.DeleteOptions{
GracePeriodSeconds: aws.Int64(0),
PropagationPolicy: &foreground,
},
)
cancel()
if err != nil {
return err
}
ts.cfg.Logger.Info("deleted configmap", zap.String("name", irsaConfigMapName))
ts.cfg.EKSConfig.Sync()
return nil
}
// TemplateDeploymentScript is the script to run in Deployment.
const TemplateDeploymentScript = `printf '\n\nexecuting...\n\n'; /opt/{{ .ConfigMapScriptFileName }};`
type deploymentScriptTemplate struct {
ConfigMapScriptFileName string
}
func (ts *tester) createDeployment() error {
ts.cfg.Logger.Info("creating IRSA Deployment")
tpl := template.Must(template.New("TemplateDeploymentScript").Parse(TemplateDeploymentScript))
buf := bytes.NewBuffer(nil)
if err := tpl.Execute(buf, deploymentScriptTemplate{
ConfigMapScriptFileName: irsaConfigMapFileName,
}); err != nil {
return err
}
tplTxt := buf.String()
ts.cfg.Logger.Info("creating IRSA Deployment", zap.String("image", ts.ecrImage))
dirOrCreate := v1.HostPathDirectoryOrCreate
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
_, err := ts.cfg.K8SClient.KubernetesClientSet().
AppsV1().
Deployments(ts.cfg.EKSConfig.AddOnIRSA.Namespace).
Create(
ctx,
&apps_v1.Deployment{
TypeMeta: metav1.TypeMeta{
APIVersion: "apps/v1",
Kind: "Deployment",
},
ObjectMeta: metav1.ObjectMeta{
Name: irsaDeploymentName,
Namespace: ts.cfg.EKSConfig.AddOnIRSA.Namespace,
Labels: map[string]string{
"app.kubernetes.io/name": irsaAppName,
},
},
Spec: apps_v1.DeploymentSpec{
Replicas: aws.Int32(ts.cfg.EKSConfig.AddOnIRSA.DeploymentReplicas),
Selector: &metav1.LabelSelector{
MatchLabels: map[string]string{
"app.kubernetes.io/name": irsaAppName,
},
},
Template: v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
"app.kubernetes.io/name": irsaAppName,
},
},
Spec: v1.PodSpec{
ServiceAccountName: irsaServiceAccountName,
// invalid: spec.template.spec.restartPolicy: Unsupported value: \"OnFailure\": supported values: \"Always\")"
RestartPolicy: v1.RestartPolicyAlways,
Containers: []v1.Container{
{
Name: irsaAppName,
Image: ts.ecrImage,
ImagePullPolicy: v1.PullIfNotPresent,
Command: []string{
"sh",
"-c",
tplTxt,
},
// ref. https://kubernetes.io/docs/concepts/cluster-administration/logging/
VolumeMounts: []v1.VolumeMount{
{ // to execute
Name: irsaConfigMapName,
MountPath: "/opt",
},
{ // to write
Name: "varlog",
MountPath: "/var/log",
ReadOnly: false,
},
},
},
},
// ref. https://kubernetes.io/docs/concepts/cluster-administration/logging/
Volumes: []v1.Volume{
{ // to execute
Name: irsaConfigMapName,
VolumeSource: v1.VolumeSource{
ConfigMap: &v1.ConfigMapVolumeSource{
LocalObjectReference: v1.LocalObjectReference{
Name: irsaConfigMapName,
},
DefaultMode: aws.Int32(0777),
},
},
},
{ // to write
Name: "varlog",
VolumeSource: v1.VolumeSource{
HostPath: &v1.HostPathVolumeSource{
Path: "/var/log",
Type: &dirOrCreate,
},
},
},
},
NodeSelector: map[string]string{
// cannot fetch results from Bottlerocket
// "AMIType": ec2config.AMITypeAL2X8664,
// do not deploy in fake nodes, obviously
"NodeType": "regular",
},
},
},
},
},
metav1.CreateOptions{},
)
cancel()
if err != nil {
return fmt.Errorf("failed to create IRSA Deployment (%v)", err)
}
ts.deploymentCreated = time.Now()
ts.cfg.Logger.Info("created IRSA Deployment")
ts.cfg.EKSConfig.Sync()
return nil
}
func (ts *tester) deleteDeployment() error {
ts.cfg.Logger.Info("deleting IRSA Deployment")
foreground := metav1.DeletePropagationForeground
ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
err := ts.cfg.K8SClient.KubernetesClientSet().
AppsV1().
Deployments(ts.cfg.EKSConfig.AddOnIRSA.Namespace).
Delete(
ctx,
irsaDeploymentName,
metav1.DeleteOptions{
GracePeriodSeconds: aws.Int64(0),
PropagationPolicy: &foreground,
},
)
cancel()
if err != nil && !apierrs.IsNotFound(err) && !strings.Contains(err.Error(), "not found") {
ts.cfg.Logger.Warn("failed to delete", zap.Error(err))
return fmt.Errorf("failed to delete IRSA Deployment (%v)", err)
}
ts.cfg.Logger.Info("deleted IRSA Deployment", zap.Error(err))
ts.cfg.EKSConfig.Sync()
return nil
}
func (ts *tester) waitDeployment() (err error) {
timeout := 7*time.Minute + time.Duration(ts.cfg.EKSConfig.AddOnIRSA.DeploymentReplicas)*time.Minute
ctx, cancel := context.WithTimeout(context.Background(), timeout)
_, err = k8s_client.WaitForDeploymentCompletes(
ctx,
ts.cfg.Logger,
ts.cfg.LogWriter,
ts.cfg.Stopc,
ts.cfg.K8SClient,
time.Minute,
20*time.Second,
ts.cfg.EKSConfig.AddOnIRSA.Namespace,
irsaDeploymentName,
ts.cfg.EKSConfig.AddOnIRSA.DeploymentReplicas,
k8s_client.WithQueryFunc(func() {
descArgs := []string{
ts.cfg.EKSConfig.KubectlPath,
"--kubeconfig=" + ts.cfg.EKSConfig.KubeConfigPath,
"--namespace=" + ts.cfg.EKSConfig.AddOnIRSA.Namespace,
"describe",
"deployment",
irsaDeploymentName,
}
descCmd := strings.Join(descArgs, " ")
ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
output, err := exec.New().CommandContext(ctx, descArgs[0], descArgs[1:]...).CombinedOutput()
cancel()
if err != nil {
ts.cfg.Logger.Warn("'kubectl describe deployment' failed", zap.Error(err))
}
out := string(output)
fmt.Fprintf(ts.cfg.LogWriter, "\n\n\"%s\" output:\n%s\n\n", descCmd, out)
getArgs := []string{
ts.cfg.EKSConfig.KubectlPath,
"--kubeconfig=" + ts.cfg.EKSConfig.KubeConfigPath,
"--namespace=" + ts.cfg.EKSConfig.AddOnIRSA.Namespace,
"get",
"pods",
}
getCmd := strings.Join(getArgs, " ")
ctx, cancel = context.WithTimeout(context.Background(), 30*time.Second)
cmdOutput, err := exec.New().CommandContext(ctx, getArgs[0], getArgs[1:]...).CombinedOutput()
cancel()
if err != nil {
ts.cfg.Logger.Warn("'kubectl get pods' failed", zap.Error(err))
}
out = string(cmdOutput)
fmt.Fprintf(ts.cfg.LogWriter, "\"%s\" output:\n\n%s\n\n", getCmd, out)
pods, err := ts.cfg.K8SClient.ListPods(ts.cfg.EKSConfig.AddOnIRSA.Namespace, 3000, 3*time.Second)
if err != nil {
ts.cfg.Logger.Warn("failed to list Pod", zap.Bool("retriable-error", k8s_client.IsRetryableAPIError(err)), zap.Error(err))
return
}
if len(pods) == 0 {
ts.cfg.Logger.Warn("got an empty list of Pod")
return
}
for _, pod := range pods {
ts.cfg.Logger.Info("pod",
zap.String("pod-name", pod.Name),
zap.String("pod-status-phase", fmt.Sprintf("%v", pod.Status.Phase)),
)
if pod.Status.Phase == v1.PodFailed {
logsArgs := []string{
ts.cfg.EKSConfig.KubectlPath,
"--kubeconfig=" + ts.cfg.EKSConfig.KubeConfigPath,
"--namespace=" + ts.cfg.EKSConfig.AddOnIRSA.Namespace,
"logs",
fmt.Sprintf("pod/%s", pod.Name),
"--timestamps",
}
logsCmd := strings.Join(logsArgs, " ")
ctx, cancel = context.WithTimeout(context.Background(), 15*time.Second)
cmdOutput, err = exec.New().CommandContext(ctx, logsArgs[0], logsArgs[1:]...).CombinedOutput()
cancel()
if err != nil {
ts.cfg.Logger.Warn("'kubectl logs' failed", zap.Error(err))
}
out = string(cmdOutput)
fmt.Fprintf(ts.cfg.LogWriter, "\"%s\" output:\n\n%s\n\n", logsCmd, out)
}
}
}),
)
cancel()
return err
}
// https://aws.amazon.com/blogs/opensource/introducing-fine-grained-iam-roles-service-accounts/
func (ts *tester) checkPodWebhook() error {
ts.cfg.Logger.Info("checking IRSA Pod spec for webhook")
waitDur := 2 * time.Minute