/
client_test.go
398 lines (341 loc) · 12.3 KB
/
client_test.go
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package aws_test
import (
"errors"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/cloudfoundry/bosh-bootloader/aws"
"github.com/cloudfoundry/bosh-bootloader/fakes"
"github.com/cloudfoundry/bosh-bootloader/storage"
awslib "github.com/aws/aws-sdk-go/aws"
awsec2 "github.com/aws/aws-sdk-go/service/ec2"
awsroute53 "github.com/aws/aws-sdk-go/service/route53"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
)
var _ = Describe("Client", func() {
Describe("NewClient", func() {
It("returns a Client with the provided configuration", func() {
client := aws.NewClient(
storage.AWS{
AccessKeyID: "some-access-key-id",
SecretAccessKey: "some-secret-access-key",
Region: "some-region",
},
&fakes.Logger{},
)
ec2Client, ok := client.GetEC2Client().(*awsec2.EC2)
Expect(ok).To(BeTrue())
_, ok = client.GetRoute53Client().(*awsroute53.Route53)
Expect(ok).To(BeTrue())
Expect(ec2Client.Config.Credentials).To(Equal(credentials.NewStaticCredentials("some-access-key-id", "some-secret-access-key", "")))
Expect(ec2Client.Config.Region).To(Equal(awslib.String("some-region")))
})
})
Describe("RetrieveDNS", func() {
var (
client aws.Client
route53Client *fakes.AWSRoute53Client
)
BeforeEach(func() {
route53Client = &fakes.AWSRoute53Client{}
client = aws.NewClientWithInjectedRoute53Client(route53Client, &fakes.Logger{})
route53Client.ListHostedZonesByNameCall.Returns.Output = &awsroute53.ListHostedZonesByNameOutput{
HostedZones: []*awsroute53.HostedZone{{
Name: awslib.String("domain.com."),
Id: awslib.String("the-id"),
}},
}
})
It("fetches dns zone with a given domain", func() {
parent := client.RetrieveDNS("some.domain.com")
Expect(parent).To(Equal("domain.com."))
Expect(route53Client.ListHostedZonesByNameCall.Receives.Input).To(Equal(&awsroute53.ListHostedZonesByNameInput{
DNSName: awslib.String("domain.com."),
}))
})
Context("when no dns zone at that domain exists", func() {
BeforeEach(func() {
route53Client.ListHostedZonesByNameCall.Returns.Output = &awsroute53.ListHostedZonesByNameOutput{
HostedZones: []*awsroute53.HostedZone{},
}
})
It("returns an empty string", func() {
parent := client.RetrieveDNS("some.domain.com")
Expect(parent).To(Equal(""))
})
})
Context("when there are multiple dns zones that have the parent domain in the name", func() {
BeforeEach(func() {
route53Client.ListHostedZonesByNameCall.Returns.Output = &awsroute53.ListHostedZonesByNameOutput{
HostedZones: []*awsroute53.HostedZone{{
Name: awslib.String("other.domain.com."),
Id: awslib.String("other-id"),
}, {
Name: awslib.String("domain.com."),
Id: awslib.String("the-id"),
}},
}
})
It("returns the parent domain", func() {
parent := client.RetrieveDNS("some.domain.com")
Expect(parent).To(Equal("domain.com."))
})
})
Context("when there are dns zones that have the parent domain in the name", func() {
BeforeEach(func() {
route53Client.ListHostedZonesByNameCall.Returns.Output = &awsroute53.ListHostedZonesByNameOutput{
HostedZones: []*awsroute53.HostedZone{{
Name: awslib.String("other.domain.com"),
Id: awslib.String("the-id"),
}},
}
})
It("returns an empty struct if the dns name is not an exact match", func() {
parent := client.RetrieveDNS("some.domain.com")
Expect(parent).To(Equal(""))
})
})
Context("when hosted zones cannot be listed", func() {
BeforeEach(func() {
route53Client.ListHostedZonesByNameCall.Returns.Error = errors.New("feijoa")
})
It("returns empty string", func() {
domain := client.RetrieveDNS("some.domain.com")
Expect(domain).To(Equal(""))
})
})
})
Describe("RetrieveAZs", func() {
var (
client aws.Client
ec2Client *fakes.AWSEC2Client
)
BeforeEach(func() {
ec2Client = &fakes.AWSEC2Client{}
client = aws.NewClientWithInjectedEC2Client(ec2Client, &fakes.Logger{})
})
It("fetches availability zones for a given region", func() {
ec2Client.DescribeAvailabilityZonesCall.Returns.Output = &awsec2.DescribeAvailabilityZonesOutput{
AvailabilityZones: []*awsec2.AvailabilityZone{
{ZoneName: awslib.String("us-east-1a")},
{ZoneName: awslib.String("us-east-1b")},
{ZoneName: awslib.String("us-east-1e")},
{ZoneName: awslib.String("us-east-1c")},
},
}
azs, err := client.RetrieveAZs("us-east-1")
Expect(err).NotTo(HaveOccurred())
Expect(azs).To(Equal([]string{"us-east-1a", "us-east-1b", "us-east-1c", "us-east-1e"}))
Expect(ec2Client.DescribeAvailabilityZonesCall.Receives.Input).To(Equal(&awsec2.DescribeAvailabilityZonesInput{
Filters: []*awsec2.Filter{{
Name: awslib.String("region-name"),
Values: []*string{awslib.String("us-east-1")},
}},
}))
})
Describe("failure cases", func() {
Context("when AWS returns a nil availability zone", func() {
BeforeEach(func() {
ec2Client.DescribeAvailabilityZonesCall.Returns.Output = &awsec2.DescribeAvailabilityZonesOutput{
AvailabilityZones: []*awsec2.AvailabilityZone{nil},
}
})
It("returns an error", func() {
_, err := client.RetrieveAZs("us-east-1")
Expect(err).To(MatchError("aws returned nil availability zone"))
})
})
Context("when an availability zone with a nil ZoneName", func() {
BeforeEach(func() {
ec2Client.DescribeAvailabilityZonesCall.Returns.Output = &awsec2.DescribeAvailabilityZonesOutput{
AvailabilityZones: []*awsec2.AvailabilityZone{{ZoneName: nil}},
}
})
It("returns an error", func() {
_, err := client.RetrieveAZs("us-east-1")
Expect(err).To(MatchError("aws returned availability zone with nil zone name"))
})
})
Context("when describe availability zones fails", func() {
BeforeEach(func() {
ec2Client.DescribeAvailabilityZonesCall.Returns.Error = errors.New("describe availability zones failed")
})
It("returns an error", func() {
_, err := client.RetrieveAZs("us-east-1")
Expect(err).To(MatchError("describe availability zones failed"))
})
})
})
})
Describe("ValidateSafeToDelete", func() {
var (
client aws.Client
ec2Client *fakes.AWSEC2Client
)
BeforeEach(func() {
ec2Client = &fakes.AWSEC2Client{}
client = aws.NewClientWithInjectedEC2Client(ec2Client, &fakes.Logger{})
})
Context("when the only EC2 instances are bosh and nat", func() {
BeforeEach(func() {
ec2Client.DescribeInstancesCall.Returns.Output = &awsec2.DescribeInstancesOutput{
Reservations: []*awsec2.Reservation{
reservationContainingInstance("NAT"),
reservationContainingInstance("bosh/0"),
},
}
})
It("returns nil", func() {
err := client.ValidateSafeToDelete("some-vpc-id", "")
Expect(err).NotTo(HaveOccurred())
Expect(ec2Client.DescribeInstancesCall.Receives.Input).To(Equal(&awsec2.DescribeInstancesInput{
Filters: []*awsec2.Filter{{
Name: awslib.String("vpc-id"),
Values: []*string{awslib.String("some-vpc-id")},
}},
}))
})
})
Context("when passed an environment ID", func() {
Context("when the only EC2 instances are bosh, jumpbox and envID-nat", func() {
BeforeEach(func() {
ec2Client.DescribeInstancesCall.Returns.Output = &awsec2.DescribeInstancesOutput{
Reservations: []*awsec2.Reservation{
reservationContainingInstance("example-env-id-nat"),
reservationContainingInstance("bosh/0"),
reservationContainingInstance("jumpbox/0"),
},
}
})
It("returns nil", func() {
err := client.ValidateSafeToDelete("some-vpc-id", "example-env-id")
Expect(err).NotTo(HaveOccurred())
Expect(ec2Client.DescribeInstancesCall.Receives.Input).To(Equal(&awsec2.DescribeInstancesInput{
Filters: []*awsec2.Filter{{
Name: awslib.String("vpc-id"),
Values: []*string{awslib.String("some-vpc-id")},
}},
}))
})
})
})
Context("when there are no instances at all", func() {
BeforeEach(func() {
ec2Client.DescribeInstancesCall.Returns.Output = &awsec2.DescribeInstancesOutput{Reservations: []*awsec2.Reservation{}}
})
It("returns nil", func() {
err := client.ValidateSafeToDelete("some-vpc-id", "")
Expect(err).NotTo(HaveOccurred())
})
})
Context("when there are bosh-deployed VMs in the VPC", func() {
BeforeEach(func() {
ec2Client.DescribeInstancesCall.Returns.Output = &awsec2.DescribeInstancesOutput{
Reservations: []*awsec2.Reservation{
reservationContainingInstance("NAT"),
reservationContainingInstance("bosh/0"),
reservationContainingInstance("first-bosh-deployed-vm"),
reservationContainingInstance("second-bosh-deployed-vm"),
},
}
})
It("returns an error", func() {
err := client.ValidateSafeToDelete("some-vpc-id", "")
Expect(err).To(MatchError("vpc some-vpc-id is not safe to delete; vms still exist: [first-bosh-deployed-vm, second-bosh-deployed-vm]"))
})
})
Context("even when there are two VMs in the VPC, but they are not NAT and BOSH", func() {
BeforeEach(func() {
ec2Client.DescribeInstancesCall.Returns.Output = &awsec2.DescribeInstancesOutput{
Reservations: []*awsec2.Reservation{
reservationContainingInstance("not-bosh"),
reservationContainingInstance("not-nat"),
},
}
})
It("returns an error", func() {
err := client.ValidateSafeToDelete("some-vpc-id", "")
Expect(err).To(MatchError("vpc some-vpc-id is not safe to delete; vms still exist: [not-bosh, not-nat]"))
})
})
Context("even if the vpc contains other instances tagged NAT and bosh/0", func() {
BeforeEach(func() {
ec2Client.DescribeInstancesCall.Returns.Output = &awsec2.DescribeInstancesOutput{
Reservations: []*awsec2.Reservation{
reservationContainingInstance("NAT"),
reservationContainingInstance("NAT"),
reservationContainingInstance("bosh/0"),
reservationContainingInstance("bosh/0"),
reservationContainingInstance("bosh/0"),
},
}
})
It("returns an error", func() {
err := client.ValidateSafeToDelete("some-vpc-id", "")
Expect(err).To(MatchError("vpc some-vpc-id is not safe to delete; vms still exist: [NAT, bosh/0, bosh/0]"))
})
})
Context("even if the vpc contains untagged vms", func() {
BeforeEach(func() {
ec2Client.DescribeInstancesCall.Returns.Output = &awsec2.DescribeInstancesOutput{
Reservations: []*awsec2.Reservation{
{
Instances: []*awsec2.Instance{{
Tags: []*awsec2.Tag{{
Key: awslib.String("Name"),
Value: awslib.String(""),
}},
}, {}, {}},
},
},
}
})
It("returns an error", func() {
err := client.ValidateSafeToDelete("some-vpc-id", "")
Expect(err).To(MatchError("vpc some-vpc-id is not safe to delete; vms still exist: [unnamed, unnamed, unnamed]"))
})
})
Context("when there are multiple nat instances", func() {
BeforeEach(func() {
ec2Client.DescribeInstancesCall.Returns.Output = &awsec2.DescribeInstancesOutput{
Reservations: []*awsec2.Reservation{
reservationContainingInstance("test-env-nat"),
reservationContainingInstance("test-env-nat"),
reservationContainingInstance("NAT"),
reservationContainingInstance("bosh/0"),
},
}
})
It("returns nil", func() {
err := client.ValidateSafeToDelete("some-vpc-id", "test-env")
Expect(err).NotTo(HaveOccurred())
Expect(ec2Client.DescribeInstancesCall.Receives.Input).To(Equal(&awsec2.DescribeInstancesInput{
Filters: []*awsec2.Filter{{
Name: awslib.String("vpc-id"),
Values: []*string{awslib.String("some-vpc-id")},
}},
}))
})
})
Describe("failure cases", func() {
Context("when the describe instances call fails", func() {
BeforeEach(func() {
ec2Client.DescribeInstancesCall.Returns.Error = errors.New("failed to describe instances")
})
It("returns an error", func() {
err := client.ValidateSafeToDelete("some-vpc-id", "")
Expect(err).To(MatchError("failed to describe instances"))
})
})
})
})
})
func reservationContainingInstance(tag string) *awsec2.Reservation {
return &awsec2.Reservation{
Instances: []*awsec2.Instance{{
Tags: []*awsec2.Tag{{
Key: awslib.String("Name"),
Value: awslib.String(tag),
}},
}},
}
}