loadbalancers

package
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 Go to latest Published: Aug 2, 2020 License: Apache-2.0 Imports: 14 Imported by: 0

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Index

Constants

View Source 
const (

	// DefaultHost is the host used if none is specified. It is a valid value
	// for the "Host" field recognized by GCE.
	DefaultHost = "*"

	// DefaultPath is the path used if none is specified. It is a valid path
	// recognized by GCE.
	DefaultPath = "/*"
)

Variables

This section is empty.

Functions

func GCEResourceName 

func GCEResourceName(ingAnnotations map[string]string, resourceName string) string

GCEResourceName retrieves the name of the gce resource created for this Ingress, of the given resource type, by inspecting the map of ingress annotations.

func GetLBAnnotations 

func GetLBAnnotations(l7 *L7, existing map[string]string, backendPool backends.BackendPool) map[string]string

GetLBAnnotations returns the annotations of an l7. This includes it's current status.

Types

type FakeLoadBalancers 

type FakeLoadBalancers struct {
	Fw    []*compute.ForwardingRule
	Um    []*compute.UrlMap
	Tp    []*compute.TargetHttpProxy
	Tps   []*compute.TargetHttpsProxy
	IP    []*compute.Address
	Certs []*compute.SslCertificate
	// contains filtered or unexported fields
}

FakeLoadBalancers is a type that fakes out the loadbalancer interface.

func NewFakeLoadBalancers 

func NewFakeLoadBalancers(name string) *FakeLoadBalancers

NewFakeLoadBalancers creates a fake cloud client. Name is the name inserted into the selfLink of the associated resources for testing. eg: forwardingRule.SelfLink == k8-fw-name.

func (*FakeLoadBalancers) CheckURLMap 

func (f *FakeLoadBalancers) CheckURLMap(t *testing.T, l7 *L7, expectedMap map[string]utils.FakeIngressRuleValueMap)

CheckURLMap checks the URL map.

func (*FakeLoadBalancers) CreateGlobalForwardingRule 

func (f *FakeLoadBalancers) CreateGlobalForwardingRule(proxyLink, ip, name, portRange string) (*compute.ForwardingRule, error)

CreateGlobalForwardingRule fakes forwarding rule creation.

func (*FakeLoadBalancers) CreateSslCertificate 

func (f *FakeLoadBalancers) CreateSslCertificate(cert *compute.SslCertificate) (*compute.SslCertificate, error)

CreateSslCertificate fakes out certificate creation.

func (*FakeLoadBalancers) CreateTargetHttpProxy 

func (f *FakeLoadBalancers) CreateTargetHttpProxy(urlMap *compute.UrlMap, name string) (*compute.TargetHttpProxy, error)

CreateTargetHttpProxy fakes creating a target http proxy.

func (*FakeLoadBalancers) CreateTargetHttpsProxy 

func (f *FakeLoadBalancers) CreateTargetHttpsProxy(urlMap *compute.UrlMap, cert *compute.SslCertificate, name string) (*compute.TargetHttpsProxy, error)

CreateTargetHttpsProxy fakes creating a target http proxy.

func (*FakeLoadBalancers) CreateUrlMap 

func (f *FakeLoadBalancers) CreateUrlMap(backend *compute.BackendService, name string) (*compute.UrlMap, error)

CreateUrlMap fakes url-map creation.

func (*FakeLoadBalancers) DeleteGlobalForwardingRule 

func (f *FakeLoadBalancers) DeleteGlobalForwardingRule(name string) error

DeleteGlobalForwardingRule fakes deleting a global forwarding rule.

func (*FakeLoadBalancers) DeleteGlobalStaticIP 

func (f *FakeLoadBalancers) DeleteGlobalStaticIP(name string) error

DeleteGlobalStaticIP fakes out static IP deletion.

func (*FakeLoadBalancers) DeleteSslCertificate 

func (f *FakeLoadBalancers) DeleteSslCertificate(name string) error

DeleteSslCertificate fakes out certificate deletion.

func (*FakeLoadBalancers) DeleteTargetHttpProxy 

func (f *FakeLoadBalancers) DeleteTargetHttpProxy(name string) error

DeleteTargetHttpProxy fakes deleting a target http proxy.

func (*FakeLoadBalancers) DeleteTargetHttpsProxy 

func (f *FakeLoadBalancers) DeleteTargetHttpsProxy(name string) error

DeleteTargetHttpsProxy fakes deleting a target http proxy.

func (*FakeLoadBalancers) DeleteUrlMap 

func (f *FakeLoadBalancers) DeleteUrlMap(name string) error

DeleteUrlMap fakes url-map deletion.

func (*FakeLoadBalancers) GetForwardingRulesWithIPs 

func (f *FakeLoadBalancers) GetForwardingRulesWithIPs(ip []string) (fwRules []*compute.ForwardingRule)

GetForwardingRulesWithIPs returns all forwarding rules that match the given ips.

func (*FakeLoadBalancers) GetGlobalForwardingRule 

func (f *FakeLoadBalancers) GetGlobalForwardingRule(name string) (*compute.ForwardingRule, error)

GetGlobalForwardingRule returns a fake forwarding rule.

func (*FakeLoadBalancers) GetGlobalStaticIP 

func (f *FakeLoadBalancers) GetGlobalStaticIP(name string) (*compute.Address, error)

GetGlobalStaticIP fakes out static IP retrieval.

func (*FakeLoadBalancers) GetSslCertificate 

func (f *FakeLoadBalancers) GetSslCertificate(name string) (*compute.SslCertificate, error)

GetSslCertificate fakes out getting ssl certs.

func (*FakeLoadBalancers) GetTargetHttpProxy 

func (f *FakeLoadBalancers) GetTargetHttpProxy(name string) (*compute.TargetHttpProxy, error)

GetTargetHttpProxy fakes getting target http proxies from the cloud.

func (*FakeLoadBalancers) GetTargetHttpsProxy 

func (f *FakeLoadBalancers) GetTargetHttpsProxy(name string) (*compute.TargetHttpsProxy, error)

GetTargetHttpsProxy fakes getting target http proxies from the cloud.

func (*FakeLoadBalancers) GetUrlMap 

func (f *FakeLoadBalancers) GetUrlMap(name string) (*compute.UrlMap, error)

GetUrlMap fakes getting url maps from the cloud.

func (*FakeLoadBalancers) ReserveGlobalStaticIP 

func (f *FakeLoadBalancers) ReserveGlobalStaticIP(name, IPAddress string) (*compute.Address, error)

ReserveGlobalStaticIP fakes out static IP reservation.

func (*FakeLoadBalancers) SetProxyForGlobalForwardingRule 

func (f *FakeLoadBalancers) SetProxyForGlobalForwardingRule(fw *compute.ForwardingRule, proxyLink string) error

SetProxyForGlobalForwardingRule fakes setting a global forwarding rule.

func (*FakeLoadBalancers) SetSslCertificateForTargetHttpsProxy 

func (f *FakeLoadBalancers) SetSslCertificateForTargetHttpsProxy(proxy *compute.TargetHttpsProxy, SSLCert *compute.SslCertificate) error

SetSslCertificateForTargetHttpsProxy fakes out setting certificates.

func (*FakeLoadBalancers) SetUrlMapForTargetHttpProxy 

func (f *FakeLoadBalancers) SetUrlMapForTargetHttpProxy(proxy *compute.TargetHttpProxy, urlMap *compute.UrlMap) error

SetUrlMapForTargetHttpProxy fakes setting an url-map for a target http proxy.

func (*FakeLoadBalancers) SetUrlMapForTargetHttpsProxy 

func (f *FakeLoadBalancers) SetUrlMapForTargetHttpsProxy(proxy *compute.TargetHttpsProxy, urlMap *compute.UrlMap) error

SetUrlMapForTargetHttpsProxy fakes setting an url-map for a target http proxy.

func (*FakeLoadBalancers) String 

func (f *FakeLoadBalancers) String() string

String is the string method for FakeLoadBalancers.

func (*FakeLoadBalancers) UpdateUrlMap 

func (f *FakeLoadBalancers) UpdateUrlMap(urlMap *compute.UrlMap) (*compute.UrlMap, error)

UpdateUrlMap fakes updating url-maps.

type L7 

type L7 struct {
	Name string
	// contains filtered or unexported fields
}

L7 represents a single L7 loadbalancer.

func (*L7) Cleanup 

func (l *L7) Cleanup() error

Cleanup deletes resources specific to this l7 in the right order. forwarding rule -> target proxy -> url map This leaves backends and health checks, which are shared across loadbalancers.

func (*L7) GetIP 

func (l *L7) GetIP() string

GetIP returns the ip associated with the forwarding rule for this l7.

func (*L7) UpdateUrlMap 

func (l *L7) UpdateUrlMap(ingressRules utils.GCEURLMap) error

UpdateUrlMap translates the given hostname: endpoint->port mapping into a gce url map.

HostRule: Conceptually contains all PathRules for a given host. PathMatcher: Associates a path rule with a host rule. Mostly an optimization. PathRule: Maps a single path regex to a backend.

The GCE url map allows multiple hosts to share url->backend mappings without duplication, eg: 

Host: foo(PathMatcher1), bar(PathMatcher1,2)
PathMatcher1:
  /a -> b1
  /b -> b2
PathMatcher2:
  /c -> b1

This leads to a lot of complexity in the common case, where all we want is a mapping of host->{/path: backend}.

Consider some alternatives:

  1. Using a single backend per PathMatcher: Host: foo(PathMatcher1,3) bar(PathMatcher1,2,3) PathMatcher1: /a -> b1 PathMatcher2: /c -> b1 PathMatcher3: /b -> b2
  2. Using a single host per PathMatcher: Host: foo(PathMatcher1) PathMatcher1: /a -> b1 /b -> b2 Host: bar(PathMatcher2) PathMatcher2: /a -> b1 /b -> b2 /c -> b1

In the context of kubernetes services, 2 makes more sense, because we rarely want to lookup backends (service:nodeport). When a service is deleted, we need to find all host PathMatchers that have the backend and remove the mapping. When a new path is added to a host (happens more frequently than service deletion) we just need to lookup the 1 pathmatcher of the host.

type L7RuntimeInfo 

type L7RuntimeInfo struct {
	// Name is the name of a loadbalancer.
	Name string
	// IP is the desired ip of the loadbalancer, eg from a staticIP.
	IP string
	// TLS are the tls certs to use in termination.
	TLS *TLSCerts
	// TLSName is the name of/for the tls cert to use.
	TLSName string
	// AllowHTTP will not setup :80, if TLS is nil and AllowHTTP is set,
	// no loadbalancer is created.
	AllowHTTP bool
	// The name of a Global Static IP. If specified, the IP associated with
	// this name is used in the Forwarding Rules for this loadbalancer.
	StaticIPName string
}

L7RuntimeInfo is info passed to this module from the controller runtime.

type L7s 

type L7s struct {
	// contains filtered or unexported fields
}

L7s implements LoadBalancerPool.

func (*L7s) Add 

func (l *L7s) Add(ri *L7RuntimeInfo) (err error)

Add gets or creates a loadbalancer. If the loadbalancer already exists, it checks that its edges are valid.

func (*L7s) Delete 

func (l *L7s) Delete(name string) error

Delete deletes a loadbalancer by name.

func (*L7s) GC 

func (l *L7s) GC(names []string) error

GC garbage collects loadbalancers not in the input list.

func (*L7s) Get 

func (l *L7s) Get(name string) (*L7, error)

Get returns the loadbalancer by name.

func (*L7s) Shutdown 

func (l *L7s) Shutdown() error

Shutdown logs whether or not the pool is empty.

func (*L7s) Sync 

func (l *L7s) Sync(lbs []*L7RuntimeInfo) error

Sync loadbalancers with the given runtime info from the controller.

type LoadBalancerPool 

type LoadBalancerPool interface {
	Get(name string) (*L7, error)
	Add(ri *L7RuntimeInfo) error
	Delete(name string) error
	Sync(ri []*L7RuntimeInfo) error
	GC(names []string) error
	Shutdown() error
}

LoadBalancerPool is an interface to manage the cloud resources associated with a gce loadbalancer.

func NewLoadBalancerPool 

func NewLoadBalancerPool(
	cloud LoadBalancers,
	defaultBackendPool backends.BackendPool,
	defaultBackendNodePort backends.ServicePort, namer *utils.Namer) LoadBalancerPool

NewLoadBalancerPool returns a new loadbalancer pool.

  • cloud: implements LoadBalancers. Used to sync L7 loadbalancer resources with the cloud.
  • defaultBackendPool: a BackendPool used to manage the GCE BackendService for the default backend.
  • defaultBackendNodePort: The nodePort of the Kubernetes service representing the default backend.

type LoadBalancers 

type LoadBalancers interface {
	// Forwarding Rules
	GetGlobalForwardingRule(name string) (*compute.ForwardingRule, error)
	CreateGlobalForwardingRule(proxyLink, ip, name, portRange string) (*compute.ForwardingRule, error)
	DeleteGlobalForwardingRule(name string) error
	SetProxyForGlobalForwardingRule(fw *compute.ForwardingRule, proxy string) error

	// UrlMaps
	GetUrlMap(name string) (*compute.UrlMap, error)
	CreateUrlMap(backend *compute.BackendService, name string) (*compute.UrlMap, error)
	UpdateUrlMap(urlMap *compute.UrlMap) (*compute.UrlMap, error)
	DeleteUrlMap(name string) error

	// TargetProxies
	GetTargetHttpProxy(name string) (*compute.TargetHttpProxy, error)
	CreateTargetHttpProxy(urlMap *compute.UrlMap, name string) (*compute.TargetHttpProxy, error)
	DeleteTargetHttpProxy(name string) error
	SetUrlMapForTargetHttpProxy(proxy *compute.TargetHttpProxy, urlMap *compute.UrlMap) error

	// TargetHttpsProxies
	GetTargetHttpsProxy(name string) (*compute.TargetHttpsProxy, error)
	CreateTargetHttpsProxy(urlMap *compute.UrlMap, SSLCerts *compute.SslCertificate, name string) (*compute.TargetHttpsProxy, error)
	DeleteTargetHttpsProxy(name string) error
	SetUrlMapForTargetHttpsProxy(proxy *compute.TargetHttpsProxy, urlMap *compute.UrlMap) error
	SetSslCertificateForTargetHttpsProxy(proxy *compute.TargetHttpsProxy, SSLCerts *compute.SslCertificate) error

	// SslCertificates
	GetSslCertificate(name string) (*compute.SslCertificate, error)
	CreateSslCertificate(certs *compute.SslCertificate) (*compute.SslCertificate, error)
	DeleteSslCertificate(name string) error

	// Static IP
	ReserveGlobalStaticIP(name, IPAddress string) (*compute.Address, error)
	GetGlobalStaticIP(name string) (*compute.Address, error)
	DeleteGlobalStaticIP(name string) error
}

LoadBalancers is an interface for managing all the gce resources needed by L7 loadbalancers. We don't have individual pools for each of these resources because none of them are usable (or acquirable) stand-alone, unlinke backends and instance groups. The dependency graph: ForwardingRule -> UrlMaps -> TargetProxies

type TLSCerts 

type TLSCerts struct {
	// Key is private key.
	Key string
	// Cert is a public key.
	Cert string
	// Chain is a certificate chain.
	Chain string
}

TLSCerts encapsulates .pem encoded TLS information.

Source Files

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