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releaser.go
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releaser.go
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package alb
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/ec2"
"github.com/aws/aws-sdk-go/service/elbv2"
"github.com/aws/aws-sdk-go/service/route53"
"github.com/hashicorp/go-hclog"
"github.com/hashicorp/waypoint-plugin-sdk/component"
"github.com/hashicorp/waypoint-plugin-sdk/docs"
"github.com/hashicorp/waypoint-plugin-sdk/framework/resource"
sdk "github.com/hashicorp/waypoint-plugin-sdk/proto/gen"
"github.com/hashicorp/waypoint-plugin-sdk/terminal"
"github.com/hashicorp/waypoint/builtin/aws/utils"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"google.golang.org/protobuf/types/known/timestamppb"
)
type Releaser struct {
config ReleaserConfig
}
const (
targetGroupInitializationTimeoutSeconds int = 120
targetGroupInitializationPollingIntervalSeconds int = 5
)
// Config implements Configurable
func (r *Releaser) Config() (interface{}, error) {
return &r.config, nil
}
// ReleaseFunc implements component.ReleaseManager
func (r *Releaser) ReleaseFunc() interface{} {
return r.Release
}
// StatusFunc implements component.Status
func (r *Releaser) StatusFunc() interface{} {
return r.Status
}
// DestroyFunc implements component.Destroyer
func (r *Releaser) DestroyFunc() interface{} {
return r.Destroy
}
func (r *Releaser) resourceManager(log hclog.Logger) *resource.Manager {
return resource.NewManager(
resource.WithLogger(log.Named("resource_manager")),
resource.WithValueProvider(r.getSession),
resource.WithResource(resource.NewResource(
resource.WithName("security_group"),
resource.WithState(&Resource_SecurityGroup{}),
resource.WithCreate(r.resourceSecurityGroupCreate),
resource.WithDestroy(r.resourceSecurityGroupDestroy),
)),
resource.WithResource(resource.NewResource(
resource.WithName("load_balancer"),
resource.WithState(&Resource_LoadBalancer{}),
resource.WithCreate(r.resourceLoadBalancerCreate),
resource.WithDestroy(r.resourceLoadBalancerDestroy),
)),
resource.WithResource(resource.NewResource(
resource.WithName("listener"),
resource.WithState(&Resource_Listener{}),
resource.WithCreate(r.resourceListenerCreate),
resource.WithDestroy(r.resourceListenerDestroy),
)),
resource.WithResource(resource.NewResource(
resource.WithName("record_set"),
resource.WithState(&Resource_RecordSet{}),
resource.WithCreate(r.resourceRecordSetCreate),
resource.WithDestroy(r.resourceRecordSetDestroy),
)),
)
}
func (r *Releaser) resourceSecurityGroupCreate(
ctx context.Context,
log hclog.Logger,
sess *session.Session,
sg terminal.StepGroup,
ui terminal.UI,
lbName string,
port int64,
state *Resource_SecurityGroup,
) error {
if r.config.ListenerARN != "" {
// a custom listner is being used, so we assume the Load Balancer is already
// created, and alrady has a security group associated with it.
log.Debug("custom listener arn found, skipping security group create")
return nil
}
ec2srv := ec2.New(sess)
// Figure out what subnets we're using. This will give us the VPC
// information.
var (
vpc *string
subnets []*string
)
if len(r.config.Subnets) == 0 {
_, v, err := utils.DefaultSubnets(ctx, sess)
if err != nil {
return err
}
vpc = v
} else {
for _, s := range r.config.Subnets {
subnets = append(subnets, aws.String(s))
}
subnetInfo, err := ec2srv.DescribeSubnets(&ec2.DescribeSubnetsInput{
SubnetIds: []*string{subnets[0]},
})
if err != nil {
return err
}
vpc = subnetInfo.Subnets[0].VpcId
}
sGroup, err := utils.CreateSecurityGroup(ctx, sess, fmt.Sprintf("%s-incoming", lbName), vpc, int(port))
if err != nil {
return err
}
state.Id = *sGroup
return nil
}
func (r *Releaser) resourceSecurityGroupDestroy(
ctx context.Context,
sess *session.Session,
state *Resource_SecurityGroup,
log hclog.Logger,
sg terminal.StepGroup,
) error {
if state.Id != "" {
step := sg.Add("Destroying Security Group...")
defer step.Abort()
log.Debug("deleting security group", "sg-id", state.Id)
ec2Svc := ec2.New(sess)
for i := 0; i < 20; i++ {
_, err := ec2Svc.DeleteSecurityGroup(&ec2.DeleteSecurityGroupInput{
GroupId: &state.Id,
})
if err == nil {
step.Done()
return nil
}
// if we encounter an unrecoverable error, exit now.
if aerr, ok := err.(awserr.Error); ok {
switch aerr.Code() {
case "DependencyViolation":
time.Sleep(2 * time.Second)
continue
case "InvalidGroup.NotFound":
log.Debug("security group not found", "sg-id", state.Id)
return nil
default:
return err
}
}
return err
}
step.Update("Destroyed Security Group")
step.Done()
}
log.Debug("no security group id found, continuing")
return nil
}
func (r *Releaser) resourceLoadBalancerCreate(
ctx context.Context,
log hclog.Logger,
sess *session.Session,
sg terminal.StepGroup,
ui terminal.UI,
lbName string,
port int64,
target *TargetGroup,
sgState *Resource_SecurityGroup,
state *Resource_LoadBalancer,
) error {
elbsrv := elbv2.New(sess)
// if a custom listner is being used, we assume the Load Balancer is already
// created, and we can skip some steps
if r.config.ListenerARN != "" {
log.Debug("custom listener arn found, skipping load balancer creation")
out, err := elbsrv.DescribeListeners(&elbv2.DescribeListenersInput{
ListenerArns: []*string{aws.String(r.config.ListenerARN)},
})
if err != nil {
return err
}
if len(out.Listeners) == 0 {
return status.Errorf(codes.NotFound, "no listeners found for arn: %s", r.config.ListenerARN)
}
listener := out.Listeners[0]
state.Arn = *listener.LoadBalancerArn
dlb, err := elbsrv.DescribeLoadBalancers(&elbv2.DescribeLoadBalancersInput{
LoadBalancerArns: []*string{listener.LoadBalancerArn},
})
if err != nil {
return err
}
if dlb != nil && len(dlb.LoadBalancers) > 0 {
state.DnsName = *dlb.LoadBalancers[0].DNSName
state.ZoneId = *dlb.LoadBalancers[0].CanonicalHostedZoneId
return nil
}
return status.Errorf(codes.NotFound, "no matching load balancer found")
}
var (
subnets []*string
err error
)
if len(r.config.Subnets) == 0 {
subnets, _, err = utils.DefaultSubnets(ctx, sess)
if err != nil {
return err
}
} else {
for _, s := range r.config.Subnets {
subnets = append(subnets, aws.String(s))
}
}
var lb *elbv2.LoadBalancer
// see if the load balancer may alread exist
dlb, err := elbsrv.DescribeLoadBalancers(&elbv2.DescribeLoadBalancersInput{
Names: []*string{&lbName},
})
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
switch aerr.Code() {
case elbv2.ErrCodeLoadBalancerNotFoundException:
// fine, means we'll create it.
default:
return err
}
} else {
return err
}
}
if dlb != nil && len(dlb.LoadBalancers) > 0 {
lb = dlb.LoadBalancers[0]
} else {
clb, err := elbsrv.CreateLoadBalancer(&elbv2.CreateLoadBalancerInput{
Name: aws.String(lbName),
Subnets: subnets,
SecurityGroups: []*string{&sgState.Id},
})
if err != nil {
return err
}
lb = clb.LoadBalancers[0]
}
if lb == nil {
// this shouldn't happen but let's be safe from nil-pointer de-ref's below
return status.Errorf(codes.Internal, "failed to create load balancer, this should not happen.")
}
state.Arn = *lb.LoadBalancerArn
state.DnsName = *lb.DNSName
state.ZoneId = *lb.CanonicalHostedZoneId
return nil
}
func (r *Releaser) resourceLoadBalancerDestroy(
ctx context.Context,
sess *session.Session,
sg terminal.StepGroup,
state *Resource_LoadBalancer,
) error {
// if the configuration does not specify existing load balancer name and the
// listener arn, we assume that our release created both of these and can
// reasonably destroy the load balancer completely. Because Listeners cannot
// exist without a Load Balancer, we assume at this point that the listener is
// destroyed.
if r.config.Name == "" && r.config.ListenerARN == "" {
step := sg.Add("Destroying Load Balancer...")
defer step.Abort()
elbsrv := elbv2.New(sess)
_, err := elbsrv.DeleteLoadBalancer(&elbv2.DeleteLoadBalancerInput{
LoadBalancerArn: &state.Arn,
})
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
if aerr.Code() == elbv2.ErrCodeLoadBalancerNotFoundException {
step.Update("Load balancer not found: %s", state.Arn)
step.Done()
return nil
}
}
return err
}
step.Update("Destroyed Load Balancer")
step.Done()
}
return nil
}
func (r *Releaser) resourceListenerCreate(
ctx context.Context,
log hclog.Logger,
sess *session.Session,
sg terminal.StepGroup,
ui terminal.UI,
port int64,
target *TargetGroup,
lbState *Resource_LoadBalancer,
state *Resource_Listener,
) error {
state.TgArn = target.Arn
elbsrv := elbv2.New(sess)
var (
certs []*elbv2.Certificate
protocol string = "HTTP"
listener *elbv2.Listener
)
shouldCreateListener := true
if r.config.CertificateId != "" {
protocol = "HTTPS"
port = 443
certs = append(certs, &elbv2.Certificate{
CertificateArn: &r.config.CertificateId,
})
}
if r.config.ListenerARN != "" {
listeners, err := elbsrv.DescribeListeners(&elbv2.DescribeListenersInput{
ListenerArns: []*string{&r.config.ListenerARN},
})
if err != nil {
return err
}
if len(listeners.Listeners) > 0 {
listener = listeners.Listeners[0]
state.Arn = *listener.ListenerArn
shouldCreateListener = false
} else {
return status.Errorf(codes.NotFound, "no listeners found for arn: %s", r.config.ListenerARN)
}
}
tgs := []*elbv2.TargetGroupTuple{
{
TargetGroupArn: aws.String(target.Arn),
Weight: aws.Int64(100),
},
}
if shouldCreateListener {
// create the listener to forward traffic to the target group
lo, err := elbsrv.CreateListener(&elbv2.CreateListenerInput{
LoadBalancerArn: aws.String(lbState.Arn),
Port: aws.Int64(port),
Protocol: aws.String(protocol),
Certificates: certs,
DefaultActions: []*elbv2.Action{
{
ForwardConfig: &elbv2.ForwardActionConfig{
TargetGroups: tgs,
},
Type: aws.String("forward"),
},
},
})
if err != nil {
log.Warn("error creating listener", "error", err)
if aerr, ok := err.(awserr.Error); ok {
// CreateListener is idempotent, but if params change, such as `DefaultActions`,
// it will return a DuplicateListener error
switch aerr.Code() {
case elbv2.ErrCodeDuplicateListenerException:
// if DuplicateListener, we actually want to ModifyListener to use
// the newly created TargetGroup & Target pair.
//
// this requires us to fetch the listener ARN from the load balancer
log.Info("duplicate listener found, attempting to modify listener")
dlo, err := elbsrv.DescribeListeners(&elbv2.DescribeListenersInput{
LoadBalancerArn: aws.String(lbState.Arn),
})
if err != nil {
return err
}
// find the listener on our port
for _, ln := range dlo.Listeners {
if *ln.Port == port {
listener = ln
}
}
mlo, err := elbsrv.ModifyListener(&elbv2.ModifyListenerInput{
ListenerArn: listener.ListenerArn,
Port: aws.Int64(port),
Protocol: aws.String(protocol),
Certificates: certs,
DefaultActions: []*elbv2.Action{
{
ForwardConfig: &elbv2.ForwardActionConfig{
TargetGroups: tgs,
},
Type: aws.String("forward"),
},
},
})
if err != nil {
return err
}
listener = mlo.Listeners[0]
state.Arn = *listener.ListenerArn
log.Info("modified listener", "arn", state.Arn)
// exit
return nil
}
}
return err
}
listener = lo.Listeners[0]
state.Arn = *listener.ListenerArn
} else {
// modify the existing listener
def := listener.DefaultActions
if len(def) > 0 && def[0].ForwardConfig != nil {
for _, tg := range def[0].ForwardConfig.TargetGroups {
if *tg.Weight > 0 && *tg.TargetGroupArn != target.Arn {
tg.Weight = aws.Int64(0)
tgs = append(tgs, tg)
log.Debug("previous target group", "arn", *tg.TargetGroupArn)
}
}
}
_, err := elbsrv.ModifyListener(&elbv2.ModifyListenerInput{
ListenerArn: listener.ListenerArn,
Port: aws.Int64(port),
Protocol: aws.String(protocol),
Certificates: certs,
DefaultActions: []*elbv2.Action{
{
ForwardConfig: &elbv2.ForwardActionConfig{
TargetGroups: tgs,
},
Type: aws.String("forward"),
},
},
})
if err != nil {
return err
}
}
return nil
}
func (r *Releaser) resourceListenerDestroy(
ctx context.Context,
sess *session.Session,
log hclog.Logger,
sg terminal.StepGroup,
state *Resource_Listener,
) error {
elbsrv := elbv2.New(sess)
if r.config.ListenerARN == "" {
// if the configuration does not specify an existing listener, we can simply
// delete the listener assuming waypoint created it
step := sg.Add("Destroying Listener...")
defer step.Abort()
_, err := elbsrv.DeleteListener(&elbv2.DeleteListenerInput{
ListenerArn: &state.Arn,
})
if err != nil {
return err
}
step.Update("Listener destroyed")
step.Done()
} else {
step := sg.Add("Removing forwarding action...")
defer step.Abort()
// if an existing listener is specified, we can at least remove the action
// that forwarded to our target group
out, err := elbsrv.DescribeListeners(&elbv2.DescribeListenersInput{
ListenerArns: []*string{&state.Arn},
})
if err != nil {
return err
}
if len(out.Listeners) == 0 {
return nil
}
listener := out.Listeners[0]
var actions []*elbv2.Action
defaultActions := listener.DefaultActions
LLOOP:
for i, def := range defaultActions {
if def.ForwardConfig != nil {
for _, tg := range def.ForwardConfig.TargetGroups {
if *tg.TargetGroupArn == state.TgArn {
// Waypoint adds a single default action. If there are more than 1,
// simply remove the one in question and leave the others alone
if len(defaultActions) > 1 {
// remove this item in-place
copy(defaultActions[i:], defaultActions[i+1:])
}
actions = defaultActions[:len(defaultActions)-1]
break LLOOP
}
}
}
}
log.Debug("modifying actions")
if len(actions) > 0 {
step.Update("modifying listener: %s", state.Arn)
_, err := elbsrv.ModifyListener(&elbv2.ModifyListenerInput{
ListenerArn: &state.Arn,
DefaultActions: actions,
})
if err != nil {
return err
}
}
step.Update("Listener destroyed")
step.Done()
}
return nil
}
func (r *Releaser) resourceRecordSetCreate(
ctx context.Context,
log hclog.Logger,
sess *session.Session,
sg terminal.StepGroup,
ui terminal.UI,
lbState *Resource_LoadBalancer,
state *Resource_RecordSet,
) error {
if r.config.ZoneId != "" {
step := sg.Add("Updating Route53...")
defer step.Abort()
r53 := route53.New(sess)
records, err := r53.ListResourceRecordSets(&route53.ListResourceRecordSetsInput{
HostedZoneId: aws.String(r.config.ZoneId),
StartRecordName: aws.String(r.config.FQDN),
StartRecordType: aws.String("A"),
MaxItems: aws.String("1"),
})
if err != nil {
return err
}
fqdn := r.config.FQDN
if fqdn[len(fqdn)-1] != '.' {
fqdn += "."
}
state.FQDN = fqdn
if len(records.ResourceRecordSets) > 0 && *(records.ResourceRecordSets[0].Name) == fqdn {
log.Debug("found existing record, assuming it's correct")
} else {
log.Debug("creating new route53 record", "zone-id", r.config.ZoneId)
input := &route53.ChangeResourceRecordSetsInput{
ChangeBatch: &route53.ChangeBatch{
Changes: []*route53.Change{
{
Action: aws.String("CREATE"),
ResourceRecordSet: &route53.ResourceRecordSet{
Name: aws.String(r.config.FQDN),
Type: aws.String("A"),
AliasTarget: &route53.AliasTarget{
DNSName: &lbState.DnsName,
EvaluateTargetHealth: aws.Bool(true),
HostedZoneId: &lbState.ZoneId,
},
},
},
},
Comment: aws.String("managed by waypoint"),
},
HostedZoneId: aws.String(r.config.ZoneId),
}
result, err := r53.ChangeResourceRecordSets(input)
if err != nil {
return err
}
log.Debug("record created", "change-id", *result.ChangeInfo.Id)
}
step.Update("Route53 record set created")
step.Done()
}
return nil
}
func (r *Releaser) resourceRecordSetDestroy(
ctx context.Context,
sess *session.Session,
log hclog.Logger,
sg terminal.StepGroup,
lbState *Resource_LoadBalancer,
state *Resource_RecordSet,
) error {
if state.FQDN == "" {
// nothing to do
log.Debug("no route 53 information")
return nil
}
step := sg.Add("Removing Route53 record...")
defer step.Abort()
r53 := route53.New(sess)
records, err := r53.ListResourceRecordSets(&route53.ListResourceRecordSetsInput{
HostedZoneId: aws.String(r.config.ZoneId),
StartRecordName: aws.String(state.FQDN),
StartRecordType: aws.String("A"),
MaxItems: aws.String("1"),
})
if err != nil {
return err
}
fqdn := r.config.FQDN
if fqdn[len(fqdn)-1] != '.' {
fqdn += "."
}
if len(records.ResourceRecordSets) > 0 && *(records.ResourceRecordSets[0].Name) != fqdn {
log.Debug("no existing record found for (%s)", fqdn)
step.Update("No existing records found to remove")
step.Done()
return nil
}
log.Debug("removing route53 record", "zone-id", r.config.ZoneId)
input := &route53.ChangeResourceRecordSetsInput{
ChangeBatch: &route53.ChangeBatch{
Changes: []*route53.Change{
{
Action: aws.String("DELETE"),
ResourceRecordSet: &route53.ResourceRecordSet{
Name: aws.String(state.FQDN),
Type: aws.String("A"),
AliasTarget: &route53.AliasTarget{
DNSName: &lbState.DnsName,
EvaluateTargetHealth: aws.Bool(true),
HostedZoneId: &lbState.ZoneId,
},
},
},
},
Comment: aws.String("managed by waypoint"),
},
HostedZoneId: aws.String(r.config.ZoneId),
}
result, err := r53.ChangeResourceRecordSets(input)
if err != nil {
return err
}
log.Debug("record destroyed", "change-id", *result.ChangeInfo.Id)
step.Update("Route53 record set removed")
step.Done()
return nil
}
func (r *Releaser) getSession(
_ context.Context,
log hclog.Logger,
target *TargetGroup,
) (*session.Session, error) {
return utils.GetSession(&utils.SessionConfig{
Region: target.Region,
Logger: log,
})
}
// Release manages target group attachment to a configured ALB
func (r *Releaser) Release(
ctx context.Context,
log hclog.Logger,
src *component.Source,
ui terminal.UI,
target *TargetGroup,
) (*Release, error) {
sg := ui.StepGroup()
defer sg.Wait()
lbName := r.config.Name
if lbName == "" {
lbName = "waypoint-" + src.App
}
// We have to clamp at a length of 32 because the Name field to
// CreateLoadBalancer requires that the name is 32 characters or less.
if len(lbName) > 32 {
lbName = lbName[:32]
log.Debug("using a shortened value for load balancer name due to AWS's length limits", "lbName", lbName)
}
// If there is a port defined, honor it.
port := int64(80)
if r.config.Port != 0 {
port = int64(r.config.Port)
}
// Create our resource manager and create
rm := r.resourceManager(log)
if err := rm.CreateAll(
ctx, log, sg, ui, src,
target, lbName, port,
); err != nil {
return nil, err
}
// Get our load balancer state to verify
lbState := rm.Resource("load_balancer").State().(*Resource_LoadBalancer)
if lbState == nil {
return nil, status.Errorf(codes.Internal, "load balancer state is nil, this should never happen")
}
return &Release{
Region: target.Region,
TargetGroupArn: target.Arn,
Url: "http://" + lbState.DnsName,
LoadBalancerArn: lbState.Arn,
ResourceState: rm.State(),
}, nil
}
func (r *Releaser) Status(
ctx context.Context,
log hclog.Logger,
release *Release,
ui terminal.UI,
) (*sdk.StatusReport, error) {
var report sdk.StatusReport
report.External = true
defer func() {
report.GeneratedTime = timestamppb.Now()
}()
if release.Region == "" {
log.Debug("Region is not available for this release. Unable to determine status.")
return &report, nil
}
sess, err := utils.GetSession(&utils.SessionConfig{
Region: release.Region,
Logger: log,
})
if err != nil {
return nil, err
}
elbsrv := elbv2.New(sess)
sg := ui.StepGroup()
defer sg.Wait()
step := sg.Add("Gathering health report for AWS/ALB platform...")
defer step.Abort()
step.Update("Waiting for at least one target to pass initialization...")
var targetHealthDescriptions []*elbv2.TargetHealthDescription
startTime := time.Now().Unix()
for {
if targetHealthDescriptions != nil {
sleepDuration := time.Second * time.Duration(targetGroupInitializationPollingIntervalSeconds)
log.Debug("Sleeping %0.f seconds to give the following target group time to initialize:\n%s", sleepDuration.Seconds(), release.TargetGroupArn)
time.Sleep(sleepDuration)
}
if startTime+int64(targetGroupInitializationTimeoutSeconds) <= time.Now().Unix() {
report.HealthMessage = fmt.Sprintf("timed out after %d seconds waiting for the following target group to initialize:\n%s", time.Now().Unix()-startTime, release.TargetGroupArn)
report.Health = sdk.StatusReport_UNKNOWN
step.Status(terminal.StatusWarn)
step.Update(report.HealthMessage)
return &report, nil
}
tgHealthResp, err := elbsrv.DescribeTargetHealthWithContext(ctx, &elbv2.DescribeTargetHealthInput{
TargetGroupArn: &release.TargetGroupArn,
})
if err != nil {
return nil, status.Errorf(codes.Unknown, "failed to describe target group %s health: %s", release.TargetGroupArn, err)
}
targetHealthDescriptions = tgHealthResp.TargetHealthDescriptions
// We may not have any targets if the target group was created very recently.
if len(targetHealthDescriptions) == 0 {
step.Update("Waiting for registered targets with health...")
continue
}
initializingCount := 0
for _, tgHealth := range targetHealthDescriptions {
// NOTE(izaaklauer) potentially unsafe dereference
if *tgHealth.TargetHealth.State == elbv2.TargetHealthStateEnumInitial {
initializingCount++
}
}
if initializingCount == len(targetHealthDescriptions) {
step.Update("Waiting for at least one target to finish initializing...")
continue
}
step.Update("Target group has been initialized.")
break
}
report.Resources = []*sdk.StatusReport_Resource{}
healthyCount := 0
for _, tgHealth := range targetHealthDescriptions {
targetId := *tgHealth.Target.Id
var health sdk.StatusReport_Health
switch *tgHealth.TargetHealth.State {
case elbv2.TargetHealthStateEnumHealthy:
healthyCount++
health = sdk.StatusReport_READY
case elbv2.TargetHealthStateEnumUnavailable:
// Lambda functions present this way. Defaulting to UNKNOWN seems reasonable here too.
healthyCount++
health = sdk.StatusReport_READY
case elbv2.TargetHealthStateEnumUnhealthy:
health = sdk.StatusReport_DOWN
default:
// There are more TargetHealthStateEnums, but they do not cleanly map to our states.
health = sdk.StatusReport_UNKNOWN
}
var healthMessage string
if tgHealth.TargetHealth.Description != nil {
healthMessage = *tgHealth.TargetHealth.Description
}
report.Resources = append(report.Resources, &sdk.StatusReport_Resource{
Health: health,
HealthMessage: healthMessage,
Name: targetId,
})
}
step.Update("Finished building report for AWS/ALB platform")
step.Done()
// NOTE(briancain): Replace ui.Status with StepGroups once this bug
// has been fixed: https://github.com/hashicorp/waypoint/issues/1536
st := ui.Status()
defer st.Close()
// If AWS registers targets slowly or incrementally, we may report an artificially low number of total targets.
totalTargets := len(targetHealthDescriptions)
if healthyCount == totalTargets {
report.Health = sdk.StatusReport_READY
report.HealthMessage = fmt.Sprintf("All %d targets are healthy.", totalTargets)
} else if healthyCount > 0 {
report.Health = sdk.StatusReport_PARTIAL
report.HealthMessage = fmt.Sprintf("Only %d/%d targets are healthy.", healthyCount, totalTargets)
st.Step(terminal.StatusWarn, report.HealthMessage)
} else {
report.Health = sdk.StatusReport_DOWN
report.HealthMessage = fmt.Sprintf("All targets are unhealthy, however your application might be available or still starting up.")
st.Step(terminal.StatusWarn, report.HealthMessage)
}
return &report, nil
}
// Destroy will modify or delete Listeners, so that the platform can destroy the
// target groups
func (r *Releaser) Destroy(
ctx context.Context,
log hclog.Logger,
release *Release,
ui terminal.UI,
) error {
sg := ui.StepGroup()
defer sg.Wait()
sess, err := utils.GetSession(&utils.SessionConfig{
Region: release.Region,
Logger: log,
})
if err != nil {
return err
}
rm := r.resourceManager(log)
// If we don't have resource state, this state is from an older version
// and we need to manually recreate it. Older versions did not save anything
// for Security Group Ids
if release.ResourceState == nil {
rm.Resource("security_group").SetState(&Resource_SecurityGroup{})
rm.Resource("load_balancer").SetState(&Resource_LoadBalancer{
Arn: release.LoadBalancerArn,
// resourceRecordSetDestroy relies on the Load Balancer state having the
// Zone Id present.
ZoneId: r.config.ZoneId,
})
l, err := findListenerArnFromTargetGroup(sess, log, release.TargetGroupArn, release.LoadBalancerArn)
if err != nil {
return err
}
rm.Resource("listener").SetState(&Resource_Listener{
TgArn: release.TargetGroupArn,
Arn: l,
})
// older releases don't have any security group information
rm.Resource("record_set").SetState(&Resource_RecordSet{
FQDN: r.config.FQDN,
})
} else {
// Load our set state
if err := rm.LoadState(release.ResourceState); err != nil {
return err
}
}
// Destroy All
return rm.DestroyAll(ctx, log, sg, ui, sess)
}
func findListenerArnFromTargetGroup(
sess *session.Session,
log hclog.Logger,
tgArn string,
lbArn string,
) (string, error) {
var listener *elbv2.Listener
elbsrv := elbv2.New(sess)
out, err := elbsrv.DescribeListeners(&elbv2.DescribeListenersInput{
LoadBalancerArn: &lbArn,
})
if err != nil {
return "", err
}
LLOOP:
// We don't know the ARN of the listener, only the Target Group and the
// LoadBalancer. We need to loop through each Listener's actions to find the
// target group that matches.
for j, ol := range out.Listeners {
for _, def := range ol.DefaultActions {
if def.ForwardConfig != nil {
for _, tg := range def.ForwardConfig.TargetGroups {
if *tg.TargetGroupArn == tgArn {
listener = out.Listeners[j]