open-consul/consul/catalog_endpoint.go

143 lines
3.5 KiB
Go

package consul
import (
"fmt"
"github.com/hashicorp/consul/consul/structs"
)
// Catalog endpoint is used to manipulate the service catalog
type Catalog struct {
srv *Server
}
// Register is used register that a node is providing a given service.
func (c *Catalog) Register(args *structs.RegisterRequest, reply *struct{}) error {
if done, err := c.srv.forward("Catalog.Register", args.Datacenter, args, reply); done {
return err
}
// Verify the args
if args.Node == "" || args.Address == "" {
return fmt.Errorf("Must provide node and address")
}
_, err := c.srv.raftApply(structs.RegisterRequestType, args)
if err != nil {
c.srv.logger.Printf("[ERR] Register failed: %v", err)
return err
}
return nil
}
// Deregister is used to remove a service registration for a given node.
func (c *Catalog) Deregister(args *structs.DeregisterRequest, reply *struct{}) error {
if done, err := c.srv.forward("Catalog.Deregister", args.Datacenter, args, reply); done {
return err
}
// Verify the args
if args.Node == "" {
return fmt.Errorf("Must provide node")
}
_, err := c.srv.raftApply(structs.DeregisterRequestType, args)
if err != nil {
c.srv.logger.Printf("[ERR] Deregister failed: %v", err)
return err
}
return nil
}
// ListDatacenters is used to query for the list of known datacenters
func (c *Catalog) ListDatacenters(args *struct{}, reply *[]string) error {
c.srv.remoteLock.RLock()
defer c.srv.remoteLock.RUnlock()
// Read the known DCs
var dcs []string
for dc := range c.srv.remoteConsuls {
dcs = append(dcs, dc)
}
// Return
*reply = dcs
return nil
}
// ListNodes is used to query the nodes in a DC
func (c *Catalog) ListNodes(dc string, reply *structs.Nodes) error {
if done, err := c.srv.forward("Catalog.ListNodes", dc, dc, reply); done {
return err
}
// Get the current nodes
state := c.srv.fsm.State()
rawNodes := state.Nodes()
// Format the response
nodes := structs.Nodes(make([]structs.Node, len(rawNodes)/2))
for i := 0; i < len(nodes); i++ {
nodes[i] = structs.Node{rawNodes[i*2], rawNodes[i*2+1]}
}
*reply = nodes
return nil
}
// ListServices is used to query the services in a DC
func (c *Catalog) ListServices(dc string, reply *structs.Services) error {
if done, err := c.srv.forward("Catalog.ListServices", dc, dc, reply); done {
return err
}
// Get the current nodes
state := c.srv.fsm.State()
services := state.Services()
*reply = services
return nil
}
// ServiceNodes returns all the nodes registered as part of a service
func (c *Catalog) ServiceNodes(args *structs.ServiceNodesRequest, reply *structs.ServiceNodes) error {
if done, err := c.srv.forward("Catalog.ServiceNodes", args.Datacenter, args, reply); done {
return err
}
// Verify the arguments
if args.ServiceName == "" {
return fmt.Errorf("Must provide service name")
}
// Get the nodes
state := c.srv.fsm.State()
var nodes structs.ServiceNodes
if args.TagFilter {
nodes = state.ServiceTagNodes(args.ServiceName, args.ServiceTag)
} else {
nodes = state.ServiceNodes(args.ServiceName)
}
*reply = nodes
return nil
}
// NodeServices returns all the services registered as part of a node
func (c *Catalog) NodeServices(args *structs.NodeServicesRequest, reply *structs.NodeServices) error {
if done, err := c.srv.forward("Catalog.NodeServices", args.Datacenter, args, reply); done {
return err
}
// Verify the arguments
if args.Node == "" {
return fmt.Errorf("Must provide node")
}
// Get the node services
state := c.srv.fsm.State()
services := state.NodeServices(args.Node)
*reply = *services
return nil
}