func (r *fakeRouter) RemoveRoute(name, ip string) error {
backendName, err := router.Retrieve(name)
if err != nil {
return err
}
if !r.HasBackend(backendName) {
return ErrBackendNotFound
}
r.mutex.Lock()
defer r.mutex.Unlock()
index := -1
routes := r.backends[backendName]
for i := range routes {
if routes[i] == ip {
index = i
break
}
}
if index < 0 {
return errors.New("Route not found")
}
routes[index] = routes[len(routes)-1]
r.backends[backendName] = routes[:len(routes)-1]
return nil
}
func (r hipacheRouter) AddRoute(name, address string) error {
backendName, err := router.Retrieve(name)
if err != nil {
return err
}
domain, err := config.GetString("hipache:domain")
if err != nil {
log.Errorf("error on getting hipache domain in add route for %s - %s", backendName, address)
return &routeError{"add", err}
}
frontend := "frontend:" + backendName + "." + domain
if err := r.addRoute(frontend, address); err != nil {
log.Errorf("error on add route for %s - %s", backendName, address)
return &routeError{"add", err}
}
cname, err := r.getCName(backendName)
if err != nil {
log.Errorf("error on get cname in add route for %s - %s", backendName, address)
return err
}
if cname == "" {
return nil
}
return r.addRoute("frontend:"+cname, address)
}
func (r elbRouter) AddRoute(name, address string) error {
backendName, err := router.Retrieve(name)
if err != nil {
return err
}
_, err = r.elb().RegisterInstancesWithLoadBalancer([]string{address}, backendName)
return err
}
func (r *fakeRouter) Routes(name string) ([]string, error) {
backendName, err := router.Retrieve(name)
if err != nil {
return nil, err
}
r.mutex.Lock()
defer r.mutex.Unlock()
routes := r.backends[backendName]
return routes, nil
}
func (s *S) TestSwap(c *gocheck.C) {
instance1 := s.server.NewInstance()
defer s.server.RemoveInstance(instance1)
instance2 := s.server.NewInstance()
defer s.server.RemoveInstance(instance2)
backend1 := "b1"
backend2 := "b2"
elb := elbRouter{}
err := elb.AddBackend(backend1)
c.Assert(err, gocheck.IsNil)
err = elb.AddRoute(backend1, instance1)
c.Assert(err, gocheck.IsNil)
err = elb.AddBackend(backend2)
c.Assert(err, gocheck.IsNil)
err = elb.AddRoute(backend2, instance2)
c.Assert(err, gocheck.IsNil)
retrieved1, err := router.Retrieve(backend1)
c.Assert(err, gocheck.IsNil)
c.Assert(retrieved1, gocheck.Equals, backend1)
retrieved2, err := router.Retrieve(backend2)
c.Assert(err, gocheck.IsNil)
c.Assert(retrieved2, gocheck.Equals, backend2)
err = elb.Swap(backend1, backend2)
c.Assert(err, gocheck.IsNil)
routes, err := elb.Routes(backend2)
c.Assert(err, gocheck.IsNil)
c.Assert(routes, gocheck.DeepEquals, []string{instance2})
routes, err = elb.Routes(backend1)
c.Assert(err, gocheck.IsNil)
c.Assert(routes, gocheck.DeepEquals, []string{instance1})
retrieved1, err = router.Retrieve(backend1)
c.Assert(err, gocheck.IsNil)
c.Assert(retrieved1, gocheck.Equals, backend2)
retrieved2, err = router.Retrieve(backend2)
c.Assert(err, gocheck.IsNil)
c.Assert(retrieved2, gocheck.Equals, backend1)
addr, err := elb.Addr(backend1)
c.Assert(err, gocheck.IsNil)
c.Assert(addr, gocheck.Equals, "b2-some-aws-stuff.us-east-1.elb.amazonaws.com")
addr, err = elb.Addr(backend2)
c.Assert(err, gocheck.IsNil)
c.Assert(addr, gocheck.Equals, "b1-some-aws-stuff.us-east-1.elb.amazonaws.com")
}
func (r elbRouter) Addr(name string) (string, error) {
backendName, err := router.Retrieve(name)
if err != nil {
return "", err
}
resp, err := r.elb().DescribeLoadBalancers(backendName)
if err != nil {
return "", err
}
return resp.LoadBalancerDescriptions[0].DNSName, nil
}
func (r elbRouter) RemoveBackend(name string) error {
backendName, err := router.Retrieve(name)
if err != nil {
return err
}
_, err = r.elb().DeleteLoadBalancer(backendName)
if err != nil {
return err
}
return router.Remove(backendName)
}
func (s *S) TestSwap(c *gocheck.C) {
instance1 := "127.0.0.1"
instance2 := "127.0.0.2"
backend1 := "b1"
backend2 := "b2"
r := fakeRouter{backends: make(map[string][]string)}
err := r.AddBackend(backend1)
c.Assert(err, gocheck.IsNil)
err = r.AddRoute(backend1, instance1)
c.Assert(err, gocheck.IsNil)
err = r.AddBackend(backend2)
c.Assert(err, gocheck.IsNil)
err = r.AddRoute(backend2, instance2)
c.Assert(err, gocheck.IsNil)
retrieved1, err := router.Retrieve(backend1)
c.Assert(err, gocheck.IsNil)
c.Assert(retrieved1, gocheck.Equals, backend1)
retrieved2, err := router.Retrieve(backend2)
c.Assert(err, gocheck.IsNil)
c.Assert(retrieved2, gocheck.Equals, backend2)
err = r.Swap(backend1, backend2)
c.Assert(err, gocheck.IsNil)
routes, err := r.Routes(backend2)
c.Assert(err, gocheck.IsNil)
c.Assert(routes, gocheck.DeepEquals, []string{instance2})
routes, err = r.Routes(backend1)
c.Assert(err, gocheck.IsNil)
c.Assert(routes, gocheck.DeepEquals, []string{instance1})
retrieved1, err = router.Retrieve(backend1)
c.Assert(err, gocheck.IsNil)
c.Assert(retrieved1, gocheck.Equals, backend2)
retrieved2, err = router.Retrieve(backend2)
c.Assert(err, gocheck.IsNil)
c.Assert(retrieved2, gocheck.Equals, backend1)
addr, err := r.Addr(backend1)
c.Assert(err, gocheck.IsNil)
c.Assert(addr, gocheck.Equals, "127.0.0.2")
addr, err = r.Addr(backend2)
c.Assert(err, gocheck.IsNil)
c.Assert(addr, gocheck.Equals, "127.0.0.1")
}
func (r *fakeRouter) RemoveBackend(name string) error {
backendName, err := router.Retrieve(name)
if err != nil {
return err
}
if !r.HasBackend(backendName) {
return ErrBackendNotFound
}
r.mutex.Lock()
defer r.mutex.Unlock()
delete(r.backends, backendName)
return nil
}
func (r *fakeRouter) SetCName(cname, name string) error {
backendName, err := router.Retrieve(name)
if err != nil {
return err
}
if !r.HasBackend(backendName) {
return nil
}
r.AddBackend(cname)
r.mutex.Lock()
defer r.mutex.Unlock()
r.backends[cname] = append(r.backends[backendName])
return nil
}
func (r *fakeRouter) AddRoute(name, ip string) error {
backendName, err := router.Retrieve(name)
if err != nil {
return err
}
if !r.HasBackend(backendName) {
return ErrBackendNotFound
}
r.mutex.Lock()
defer r.mutex.Unlock()
routes := r.backends[backendName]
routes = append(routes, ip)
r.backends[backendName] = routes
return nil
}
func (r elbRouter) Routes(name string) ([]string, error) {
backendName, err := router.Retrieve(name)
if err != nil {
return nil, err
}
var routes []string
resp, err := r.elb().DescribeLoadBalancers(backendName)
if err != nil {
return nil, err
}
for _, instance := range resp.LoadBalancerDescriptions[0].Instances {
routes = append(routes, instance.InstanceId)
}
return routes, nil
}
func (r hipacheRouter) UnsetCName(cname, name string) error {
backendName, err := router.Retrieve(name)
if err != nil {
return err
}
conn := connect()
defer conn.Close()
_, err = conn.Do("DEL", "cname:"+backendName)
if err != nil {
return &routeError{"unsetCName", err}
}
_, err = conn.Do("DEL", "frontend:"+cname)
if err != nil {
return &routeError{"unsetCName", err}
}
return nil
}
func (hipacheRouter) Routes(name string) ([]string, error) {
backendName, err := router.Retrieve(name)
if err != nil {
return nil, err
}
domain, err := config.GetString("hipache:domain")
if err != nil {
return nil, &routeError{"routes", err}
}
frontend := "frontend:" + backendName + "." + domain
conn := connect()
defer conn.Close()
routes, err := redis.Strings(conn.Do("LRANGE", frontend, 0, -1))
if err != nil {
return nil, &routeError{"routes", err}
}
return routes, nil
}
func (hipacheRouter) Addr(name string) (string, error) {
backendName, err := router.Retrieve(name)
if err != nil {
return "", err
}
domain, err := config.GetString("hipache:domain")
if err != nil {
return "", &routeError{"get", err}
}
frontend := "frontend:" + backendName + "." + domain
conn := connect()
defer conn.Close()
reply, err := conn.Do("LRANGE", frontend, 0, 0)
if err != nil {
return "", &routeError{"get", err}
}
backends := reply.([]interface{})
if len(backends) < 1 {
return "", errRouteNotFound
}
return fmt.Sprintf("%s.%s", backendName, domain), nil
}
func (r hipacheRouter) SetCName(cname, name string) error {
backendName, err := router.Retrieve(name)
if err != nil {
return err
}
domain, err := config.GetString("hipache:domain")
if err != nil {
return &routeError{"setCName", err}
}
if !r.validCName(cname) {
err := errors.New(fmt.Sprintf("Invalid CNAME %s. You can't use Tsuru's application domain.", cname))
return &routeError{"setCName", err}
}
frontend := "frontend:" + backendName + "." + domain
conn := connect()
defer conn.Close()
routes, err := redis.Strings(conn.Do("LRANGE", frontend, 0, -1))
if err != nil {
return &routeError{"get", err}
}
if oldCName, err := redis.String(conn.Do("GET", "cname:"+backendName)); err == nil && oldCName != "" {
err = r.UnsetCName(oldCName, backendName)
if err != nil {
return &routeError{"setCName", err}
}
}
_, err = conn.Do("SET", "cname:"+backendName, cname)
if err != nil {
return &routeError{"set", err}
}
frontend = "frontend:" + cname
for _, r := range routes {
_, err := conn.Do("RPUSH", frontend, r)
if err != nil {
return &routeError{"setCName", err}
}
}
return nil
}
func (r hipacheRouter) RemoveRoute(name, address string) error {
backendName, err := router.Retrieve(name)
if err != nil {
return err
}
domain, err := config.GetString("hipache:domain")
if err != nil {
return &routeError{"remove", err}
}
frontend := "frontend:" + backendName + "." + domain
if err := r.removeElement(frontend, address); err != nil {
return err
}
cname, err := r.getCName(backendName)
if err != nil {
return &routeError{"remove", err}
}
if cname == "" {
return nil
}
return r.removeElement("frontend:"+cname, address)
}
func (r hipacheRouter) RemoveBackend(name string) error {
backendName, err := router.Retrieve(name)
if err != nil {
return err
}
domain, err := config.GetString("hipache:domain")
if err != nil {
return &routeError{"remove", err}
}
frontend := "frontend:" + backendName + "." + domain
conn := connect()
defer conn.Close()
_, err = conn.Do("DEL", frontend)
if err != nil {
return &routeError{"remove", err}
}
err = router.Remove(backendName)
if err != nil {
return &routeError{"remove", err}
}
cname, err := r.getCName(backendName)
if err != nil {
return err
}
if cname == "" {
return nil
}
_, err = conn.Do("DEL", "frontend:"+cname)
if err != nil {
return &routeError{"remove", err}
}
_, err = conn.Do("DEL", "cname:"+backendName)
if err != nil {
return &routeError{"remove", err}
}
return nil
}
