open-consul/command/agent/agent_endpoint.go

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package agent
import (
"fmt"
"github.com/hashicorp/consul/consul/structs"
"github.com/hashicorp/serf/serf"
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"net/http"
"strconv"
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"strings"
)
type AgentSelf struct {
Config *Config
Member serf.Member
}
func (s *HTTPServer) AgentSelf(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
return AgentSelf{
Config: s.agent.config,
Member: s.agent.LocalMember(),
}, nil
}
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func (s *HTTPServer) AgentServices(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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services := s.agent.state.Services()
return services, nil
}
func (s *HTTPServer) AgentChecks(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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checks := s.agent.state.Checks()
return checks, nil
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}
func (s *HTTPServer) AgentMembers(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
// Check if the WAN is being queried
wan := false
if other := req.URL.Query().Get("wan"); other != "" {
wan = true
}
if wan {
return s.agent.WANMembers(), nil
} else {
return s.agent.LANMembers(), nil
}
}
func (s *HTTPServer) AgentJoin(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
// Check if the WAN is being queried
wan := false
if other := req.URL.Query().Get("wan"); other != "" {
wan = true
}
// Get the address
addr := strings.TrimPrefix(req.URL.Path, "/v1/agent/join/")
if wan {
_, err := s.agent.JoinWAN([]string{addr})
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return nil, err
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} else {
_, err := s.agent.JoinLAN([]string{addr})
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return nil, err
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}
}
func (s *HTTPServer) AgentForceLeave(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
addr := strings.TrimPrefix(req.URL.Path, "/v1/agent/force-leave/")
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return nil, s.agent.ForceLeave(addr)
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}
func (s *HTTPServer) AgentRegisterCheck(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
var args CheckDefinition
// Fixup the type decode of TTL or Interval
decodeCB := func(raw interface{}) error {
return FixupCheckType(raw)
}
if err := decodeBody(req, &args, decodeCB); err != nil {
resp.WriteHeader(400)
resp.Write([]byte(fmt.Sprintf("Request decode failed: %v", err)))
return nil, nil
}
// Verify the check has a name
if args.Name == "" {
resp.WriteHeader(400)
resp.Write([]byte("Missing check name"))
return nil, nil
}
// Construct the health check
health := args.HealthCheck(s.agent.config.NodeName)
// Verify the check type
chkType := &args.CheckType
if !chkType.Valid() {
resp.WriteHeader(400)
resp.Write([]byte("Must provide TTL or Script and Interval!"))
return nil, nil
}
// Get the provided token, if any
var token string
s.parseToken(req, &token)
// Add the check
if err := s.agent.AddCheck(health, chkType, true, token); err != nil {
return nil, err
}
s.syncChanges()
return nil, nil
}
func (s *HTTPServer) AgentDeregisterCheck(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
checkID := strings.TrimPrefix(req.URL.Path, "/v1/agent/check/deregister/")
if err := s.agent.RemoveCheck(checkID, true); err != nil {
return nil, err
}
s.syncChanges()
return nil, nil
}
func (s *HTTPServer) AgentCheckPass(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
checkID := strings.TrimPrefix(req.URL.Path, "/v1/agent/check/pass/")
note := req.URL.Query().Get("note")
if err := s.agent.UpdateCheck(checkID, structs.HealthPassing, note); err != nil {
return nil, err
}
s.syncChanges()
return nil, nil
}
func (s *HTTPServer) AgentCheckWarn(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
checkID := strings.TrimPrefix(req.URL.Path, "/v1/agent/check/warn/")
note := req.URL.Query().Get("note")
if err := s.agent.UpdateCheck(checkID, structs.HealthWarning, note); err != nil {
return nil, err
}
s.syncChanges()
return nil, nil
}
func (s *HTTPServer) AgentCheckFail(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
checkID := strings.TrimPrefix(req.URL.Path, "/v1/agent/check/fail/")
note := req.URL.Query().Get("note")
if err := s.agent.UpdateCheck(checkID, structs.HealthCritical, note); err != nil {
return nil, err
}
s.syncChanges()
return nil, nil
}
func (s *HTTPServer) AgentRegisterService(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
var args ServiceDefinition
// Fixup the type decode of TTL or Interval if a check if provided
decodeCB := func(raw interface{}) error {
rawMap, ok := raw.(map[string]interface{})
if !ok {
return nil
}
for k, v := range rawMap {
switch strings.ToLower(k) {
case "check":
if err := FixupCheckType(v); err != nil {
return err
}
case "checks":
chkTypes, ok := v.([]interface{})
if !ok {
continue
}
for _, chkType := range chkTypes {
if err := FixupCheckType(chkType); err != nil {
return err
}
}
}
}
return nil
}
if err := decodeBody(req, &args, decodeCB); err != nil {
resp.WriteHeader(400)
resp.Write([]byte(fmt.Sprintf("Request decode failed: %v", err)))
return nil, nil
}
// Verify the service has a name
if args.Name == "" {
resp.WriteHeader(400)
resp.Write([]byte("Missing service name"))
return nil, nil
}
// Get the node service
ns := args.NodeService()
// Verify the check type
chkTypes := args.CheckTypes()
for _, check := range chkTypes {
if !check.Valid() {
resp.WriteHeader(400)
resp.Write([]byte("Must provide TTL or Script and Interval!"))
return nil, nil
}
}
// Get the provided token, if any
var token string
s.parseToken(req, &token)
// Add the check
if err := s.agent.AddService(ns, chkTypes, true, token); err != nil {
return nil, err
}
s.syncChanges()
return nil, nil
}
func (s *HTTPServer) AgentDeregisterService(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
serviceID := strings.TrimPrefix(req.URL.Path, "/v1/agent/service/deregister/")
if err := s.agent.RemoveService(serviceID, true); err != nil {
return nil, err
}
s.syncChanges()
return nil, nil
}
func (s *HTTPServer) AgentServiceMaintenance(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
// Only PUT supported
if req.Method != "PUT" {
resp.WriteHeader(405)
return nil, nil
}
// Ensure we have a service ID
serviceID := strings.TrimPrefix(req.URL.Path, "/v1/agent/service/maintenance/")
if serviceID == "" {
resp.WriteHeader(400)
resp.Write([]byte("Missing service ID"))
return nil, nil
}
// Ensure we have some action
params := req.URL.Query()
if _, ok := params["enable"]; !ok {
resp.WriteHeader(400)
resp.Write([]byte("Missing value for enable"))
return nil, nil
}
raw := params.Get("enable")
enable, err := strconv.ParseBool(raw)
if err != nil {
resp.WriteHeader(400)
resp.Write([]byte(fmt.Sprintf("Invalid value for enable: %q", raw)))
return nil, nil
}
if enable {
reason := params.Get("reason")
if err = s.agent.EnableServiceMaintenance(serviceID, reason); err != nil {
resp.WriteHeader(404)
resp.Write([]byte(err.Error()))
return nil, nil
}
} else {
if err = s.agent.DisableServiceMaintenance(serviceID); err != nil {
resp.WriteHeader(404)
resp.Write([]byte(err.Error()))
return nil, nil
}
}
s.syncChanges()
return nil, nil
}
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func (s *HTTPServer) AgentNodeMaintenance(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
// Only PUT supported
if req.Method != "PUT" {
resp.WriteHeader(405)
return nil, nil
}
// Ensure we have some action
params := req.URL.Query()
if _, ok := params["enable"]; !ok {
resp.WriteHeader(400)
resp.Write([]byte("Missing value for enable"))
return nil, nil
}
raw := params.Get("enable")
enable, err := strconv.ParseBool(raw)
if err != nil {
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resp.WriteHeader(400)
resp.Write([]byte(fmt.Sprintf("Invalid value for enable: %q", raw)))
return nil, nil
}
if enable {
s.agent.EnableNodeMaintenance(params.Get("reason"))
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} else {
s.agent.DisableNodeMaintenance()
}
s.syncChanges()
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return nil, nil
}
// syncChanges is a helper function which wraps a blocking call to sync
// services and checks to the server. If the operation fails, we only
// only warn because the write did succeed and anti-entropy will sync later.
func (s *HTTPServer) syncChanges() {
if err := s.agent.state.syncChanges(); err != nil {
s.logger.Printf("[ERR] agent: failed to sync changes: %v", err)
}
}