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/
ecs.go
700 lines (609 loc) · 15.8 KB
/
ecs.go
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package aws
import (
"context"
"fmt"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/cloudwatchlogs"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/aws/aws-sdk-go/service/ecs"
"github.com/aws/aws-sdk-go/service/efs"
"github.com/aws/aws-sdk-go/service/iam"
"github.com/aws/aws-sdk-go/service/resourcegroups"
"github.com/hashicorp/go-hclog"
"github.com/hashicorp/waypoint-plugin-sdk/component"
"github.com/hashicorp/waypoint-plugin-sdk/terminal"
)
const (
defaultServerTagName = "waypoint-server"
defaultServerTagValue = "server-component"
ServerName = "waypoint-server"
DefaultStaticRunnerName = "waypoint-static-runner"
DefaultSecurityGroupName = "waypoint-server-security-group"
RolePolicy = `{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "ecs-tasks.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}`
)
type Lifecycle struct {
Init func(terminal.UI) error
Run func(terminal.UI) error
Cleanup func(terminal.UI) error
}
type NetworkInformation struct {
VpcID *string
SgID *string
Subnets []*string
}
type EfsInformation struct {
FileSystemID *string
AccessPointID *string
}
func (lf *Lifecycle) Execute(log hclog.Logger, ui terminal.UI) error {
if lf.Init != nil {
log.Debug("lifecycle init")
err := lf.Init(ui)
if err != nil {
return err
}
}
log.Debug("lifecycle run")
err := lf.Run(ui)
if err != nil {
return err
}
if lf.Cleanup != nil {
log.Debug("lifecycle cleanup")
err = lf.Cleanup(ui)
if err != nil {
return err
}
}
return nil
}
// SetupNetworking retrieves subnet information and creates the security group
// necessary for Waypoint.
func SetupNetworking(
ctx context.Context,
ui terminal.UI,
sess *session.Session,
subnet []string,
ports []*int64,
) (*NetworkInformation, error) {
sg := ui.StepGroup()
defer sg.Wait()
s := sg.Add("Setting up networking...")
defer s.Abort()
subnets, vpcID, err := subnetInfo(ctx, s, sess, subnet)
if err != nil {
return nil, err
}
s.Update("Setting up security group...")
sgID, err := createSG(ctx, s, sess, DefaultSecurityGroupName, vpcID, ports)
if err != nil {
return nil, err
}
s.Update("Networking setup")
s.Done()
ni := NetworkInformation{
VpcID: vpcID,
Subnets: subnets,
SgID: sgID,
}
return &ni, nil
}
func SetupEFS(
ctx context.Context,
ui terminal.UI,
sess *session.Session,
netInfo *NetworkInformation,
efsTags []*efs.Tag,
) (*EfsInformation, error) {
sg := ui.StepGroup()
defer sg.Wait()
s := sg.Add("Creating new EFS file system...")
defer func() { s.Abort() }()
efsSvc := efs.New(sess)
ulid, _ := component.Id()
fsd, err := efsSvc.CreateFileSystem(&efs.CreateFileSystemInput{
CreationToken: aws.String(ulid),
Encrypted: aws.Bool(true),
Tags: efsTags,
})
if err != nil {
return nil, err
}
_, err = efsSvc.DescribeFileSystems(&efs.DescribeFileSystemsInput{
CreationToken: aws.String(ulid),
})
if err != nil {
return nil, err
}
s.Update("Created new EFS file system: %s", *fsd.FileSystemId)
EFSLOOP:
for i := 0; i < 10; i++ {
fsList, err := efsSvc.DescribeFileSystems(&efs.DescribeFileSystemsInput{
FileSystemId: fsd.FileSystemId,
})
if err != nil {
return nil, err
}
if len(fsList.FileSystems) == 0 {
return nil, fmt.Errorf("file system (%s) not found", *fsd.FileSystemId)
}
// check the status of the first one
fs := fsList.FileSystems[0]
switch *fs.LifeCycleState {
case efs.LifeCycleStateDeleted, efs.LifeCycleStateDeleting:
return nil, fmt.Errorf("files system is deleting/deleted")
case efs.LifeCycleStateAvailable:
break EFSLOOP
}
time.Sleep(2 * time.Second)
}
s.Update("Creating EFS Mount targets...")
// poll for available
for _, sub := range netInfo.Subnets {
_, err := efsSvc.CreateMountTarget(&efs.CreateMountTargetInput{
FileSystemId: fsd.FileSystemId,
SecurityGroups: []*string{netInfo.SgID},
SubnetId: sub,
// Mount Targets do not support tags directly
})
if err != nil {
return nil, fmt.Errorf("error creating mount target: %w", err)
}
}
// create EFS access points
s.Update("Creating EFS Access Point...")
uid := aws.Int64(int64(100))
gid := aws.Int64(int64(1000))
// TODO: Change path to not always include "server"
accessPoint, err := efsSvc.CreateAccessPoint(&efs.CreateAccessPointInput{
FileSystemId: fsd.FileSystemId,
PosixUser: &efs.PosixUser{
Uid: uid,
Gid: gid,
},
RootDirectory: &efs.RootDirectory{
CreationInfo: &efs.CreationInfo{
OwnerUid: uid,
OwnerGid: gid,
Permissions: aws.String("755"),
},
Path: aws.String("/waypointserverdata"),
},
})
if err != nil {
return nil, fmt.Errorf("error creating access point: %w", err)
}
// loop until all mount targets are ready, or the first container can have
// issues starting
// TODO: Update to use context instead of sleep
s.Update("Waiting for EFS mount targets to become available...")
var available int
for i := 0; 1 < 30; i++ {
mtgs, err := efsSvc.DescribeMountTargets(&efs.DescribeMountTargetsInput{
AccessPointId: accessPoint.AccessPointId,
})
if err != nil {
return nil, err
}
for _, m := range mtgs.MountTargets {
if *m.LifeCycleState == efs.LifeCycleStateAvailable {
available++
}
}
if available == len(netInfo.Subnets) {
break
}
available = 0
time.Sleep(5 * time.Second)
continue
}
if available != len(netInfo.Subnets) {
return nil, fmt.Errorf("not enough available mount targets found")
}
s.Update("EFS ready")
s.Done()
return &EfsInformation{
FileSystemID: fsd.FileSystemId,
AccessPointID: accessPoint.AccessPointId,
}, nil
}
func CreateService(serviceInput *ecs.CreateServiceInput, ecsSvc *ecs.ECS) (*ecs.Service, error) {
// AWS is eventually consistent so even though we probably created the
// resources that are referenced by the service, it can error out if we try to
// reference those resources too quickly. So we're forced to guard actions
// which reference other AWS services with loops like this.
var (
servOut *ecs.CreateServiceOutput
err error
)
for i := 0; i < 30; i++ {
servOut, err = ecsSvc.CreateService(serviceInput)
if err == nil {
break
}
// if we encounter an unrecoverable error, exit now.
if aerr, ok := err.(awserr.Error); ok {
switch aerr.Code() {
case "AccessDeniedException", "UnsupportedFeatureException",
"PlatformUnknownException",
"PlatformTaskDefinitionIncompatibilityException":
return nil, err
}
}
// otherwise sleep and try again
time.Sleep(2 * time.Second)
}
if err != nil {
return nil, err
}
return servOut.Service, nil
}
// TODO: Add runner ID as tag
// SetupExecutionRole creates the necessary IAM execution role for Waypoint, if it does not exist
func SetupExecutionRole(
ctx context.Context,
ui terminal.UI,
log hclog.Logger,
sess *session.Session,
executionRoleName string,
) (string, error) {
sg := ui.StepGroup()
defer sg.Wait()
s := sg.Add("Setting up an IAM execution role...")
defer func() { s.Abort() }()
svc := iam.New(sess)
roleName := executionRoleName
// role names have to be 64 characters or less, and the client side doesn't
// validate this.
if len(roleName) > 64 {
roleName = roleName[:64]
log.Debug("using a shortened value for role name due to AWS's length limits", "roleName", roleName)
}
log.Debug("attempting to retrieve existing role", "role-name", roleName)
queryInput := &iam.GetRoleInput{
RoleName: aws.String(roleName),
}
getOut, err := svc.GetRole(queryInput)
if err == nil {
s.Update("Found existing IAM role to use: %s", roleName)
s.Done()
return *getOut.Role.Arn, nil
}
log.Debug("creating new role")
s.Update("Creating IAM role: %s", roleName)
input := &iam.CreateRoleInput{
AssumeRolePolicyDocument: aws.String(RolePolicy),
Path: aws.String("/"),
RoleName: aws.String(roleName),
Tags: []*iam.Tag{
{
Key: aws.String(defaultServerTagName),
Value: aws.String(defaultServerTagValue),
},
},
}
result, err := svc.CreateRole(input)
if err != nil {
return "", err
}
roleArn := *result.Role.Arn
log.Debug("created new execution role", "arn", roleArn)
aInput := &iam.AttachRolePolicyInput{
RoleName: aws.String(roleName),
PolicyArn: aws.String("arn:aws:iam::aws:policy/service-role/AmazonECSTaskExecutionRolePolicy"),
}
_, err = svc.AttachRolePolicy(aInput)
if err != nil {
return "", err
}
log.Debug("attached IAM execution role policy")
s.Update("Created IAM execution role: %s", roleName)
s.Done()
return roleArn, nil
}
// subnetInfo returns the subnets and VPC to the caller. If no subnets
// were provided as input, then the default subnets are returned.
func subnetInfo(
ctx context.Context,
s terminal.Step,
sess *session.Session,
subnet []string,
) ([]*string, *string, error) {
ec2Svc := ec2.New(sess)
var (
subnets []*string
vpcID *string
)
if len(subnet) == 0 {
s.Update("Using default subnets for Service networking")
desc, err := ec2Svc.DescribeSubnets(&ec2.DescribeSubnetsInput{
Filters: []*ec2.Filter{
{
Name: aws.String("default-for-az"),
Values: []*string{aws.String("true")},
},
},
})
if err != nil {
return nil, nil, err
}
for _, subnet := range desc.Subnets {
subnets = append(subnets, subnet.SubnetId)
}
if len(desc.Subnets) == 0 {
return nil, nil, fmt.Errorf("no default subnet information found")
}
vpcID = desc.Subnets[0].VpcId
return subnets, vpcID, nil
}
subnets = make([]*string, len(subnet))
for j := range subnet {
subnets[j] = &subnet[j]
}
s.Update("Using provided subnets for Service networking")
subnetInfo, err := ec2Svc.DescribeSubnets(&ec2.DescribeSubnetsInput{
SubnetIds: subnets,
})
if err != nil {
return nil, nil, err
}
if len(subnetInfo.Subnets) == 0 {
return nil, nil, fmt.Errorf("no subnet information found for provided subnets")
}
vpcID = subnetInfo.Subnets[0].VpcId
return subnets, vpcID, nil
}
func createSG(
ctx context.Context,
s terminal.Step,
sess *session.Session,
name string,
vpcId *string,
ports []*int64,
) (*string, error) {
ec2srv := ec2.New(sess)
dsg, err := ec2srv.DescribeSecurityGroups(&ec2.DescribeSecurityGroupsInput{
Filters: []*ec2.Filter{
{
Name: aws.String("group-name"),
Values: []*string{aws.String(name)},
},
{
Name: aws.String("vpc-id"),
Values: []*string{vpcId},
},
},
})
if err != nil {
return nil, err
}
var groupId *string
if len(dsg.SecurityGroups) != 0 {
groupId = dsg.SecurityGroups[0].GroupId
s.Update("Using existing security group: %s", name)
} else {
s.Update("Creating security group: %s", name)
out, err := ec2srv.CreateSecurityGroup(&ec2.CreateSecurityGroupInput{
Description: aws.String("created by waypoint"),
GroupName: aws.String(name),
VpcId: vpcId,
TagSpecifications: []*ec2.TagSpecification{
{
ResourceType: aws.String(ec2.ResourceTypeSecurityGroup),
Tags: []*ec2.Tag{
{
Key: aws.String(defaultServerTagName),
Value: aws.String(defaultServerTagValue),
},
},
},
},
})
if err != nil {
return nil, err
}
groupId = out.GroupId
s.Update("Created security group: %s", name)
}
s.Update("Authorizing ports to security group")
// Port 2049 is the port for accessing EFS file systems over NFS
for _, port := range ports {
_, err = ec2srv.AuthorizeSecurityGroupIngress(&ec2.AuthorizeSecurityGroupIngressInput{
CidrIp: aws.String("0.0.0.0/0"),
FromPort: port,
ToPort: port,
GroupId: groupId,
IpProtocol: aws.String("tcp"),
})
}
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
switch aerr.Code() {
case "InvalidPermission.Duplicate":
// fine, means we already added it.
default:
return nil, err
}
} else {
return nil, err
}
}
return groupId, nil
}
func SetupLogs(
ctx context.Context,
ui terminal.UI,
log hclog.Logger,
sess *session.Session,
logGroup string,
) (string, error) {
cwl := cloudwatchlogs.New(sess)
sg := ui.StepGroup()
defer sg.Wait()
s := sg.Add("Examining existing CloudWatchLogs groups...")
defer func() { s.Abort() }()
groups, err := cwl.DescribeLogGroups(&cloudwatchlogs.DescribeLogGroupsInput{
Limit: aws.Int64(1),
LogGroupNamePrefix: aws.String(logGroup),
})
if err != nil {
return "", err
}
if len(groups.LogGroups) == 0 {
s.Update("Creating CloudWatchLogs group to store logs in: %s", logGroup)
log.Debug("creating log group", "group", logGroup)
_, err = cwl.CreateLogGroup(&cloudwatchlogs.CreateLogGroupInput{
LogGroupName: aws.String(logGroup),
})
if err != nil {
return "", err
}
s.Update("Created CloudWatchLogs group to store logs in: %s", logGroup)
} else {
s.Update("Using existing log group")
}
s.Done()
return logGroup, nil
}
// DeleteEcsCommonResources deletes the provided ECS service and task definition
func DeleteEcsCommonResources(
ctx context.Context,
sess *session.Session,
clusterArn string,
resources []*resourcegroups.ResourceIdentifier,
) error {
ecsSvc := ecs.New(sess)
var serviceArn string
for _, r := range resources {
if *r.ResourceType == "AWS::ECS::Service" {
serviceArn = *r.ResourceArn
}
}
if serviceArn == "" {
return nil
}
_, err := ecsSvc.DeleteService(&ecs.DeleteServiceInput{
Service: &serviceArn,
Force: aws.Bool(true),
Cluster: &clusterArn,
})
if err != nil {
return err
}
runningTasks, err := ecsSvc.ListTasks(&ecs.ListTasksInput{
Cluster: &clusterArn,
DesiredStatus: aws.String(ecs.DesiredStatusRunning),
})
if err != nil {
return err
}
for _, task := range runningTasks.TaskArns {
_, err := ecsSvc.StopTask(&ecs.StopTaskInput{
Cluster: &clusterArn,
Task: task,
})
if err != nil {
return err
}
}
err = ecsSvc.WaitUntilServicesInactive(&ecs.DescribeServicesInput{
Cluster: &clusterArn,
Services: []*string{&serviceArn},
})
if err != nil {
return err
}
for _, r := range resources {
if *r.ResourceType == "AWS::ECS::TaskDefinition" {
_, err := ecsSvc.DeregisterTaskDefinition(&ecs.DeregisterTaskDefinitionInput{
TaskDefinition: r.ResourceArn,
})
if err != nil {
return err
}
}
}
return nil
}
func DeleteCWLResources(
ctx context.Context,
sess *session.Session,
logGroup string,
) error {
cwlSvc := cloudwatchlogs.New(sess)
_, err := cwlSvc.DeleteLogGroup(&cloudwatchlogs.DeleteLogGroupInput{
LogGroupName: aws.String(logGroup),
})
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
switch aerr.Code() {
case "ResourceNotFoundException":
// the log group has already been destroyed
return nil
}
}
return err
}
return nil
}
func DeleteEcsResources(
ctx context.Context,
sess *session.Session,
resources []*resourcegroups.ResourceIdentifier,
) error {
ecsSvc := ecs.New(sess)
var clusterArn string
for _, r := range resources {
if *r.ResourceType == "AWS::ECS::Cluster" {
clusterArn = *r.ResourceArn
}
}
if err := DeleteEcsCommonResources(ctx, sess, clusterArn, resources); err != nil {
return err
}
_, err := ecsSvc.DeleteCluster(&ecs.DeleteClusterInput{
Cluster: &clusterArn,
})
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
switch aerr.Code() {
case "ClusterNotFoundException":
// the cluster has already been destroyed
return nil
}
}
return err
}
return nil
}
func FindServices(serviceNames []string, ecsSvc *ecs.ECS, cluster string) ([]*ecs.Service, error) {
var services []*ecs.Service
for _, serviceName := range serviceNames {
ss, err := ecsSvc.DescribeServices(&ecs.DescribeServicesInput{
Cluster: aws.String(cluster),
Services: []*string{aws.String(serviceName)},
})
if err != nil {
return nil, err
}
if len(ss.Services) > 0 {
services = append(services, ss.Services...)
}
}
return services, nil
}