forked from hashicorp/nomad
/
agent_endpoint.go
402 lines (345 loc) · 9.83 KB
/
agent_endpoint.go
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package agent
import (
"encoding/json"
"net"
"net/http"
"sort"
"strings"
"github.com/hashicorp/nomad/acl"
"github.com/hashicorp/nomad/nomad/structs"
"github.com/hashicorp/serf/serf"
"github.com/mitchellh/copystructure"
)
type Member struct {
Name string
Addr net.IP
Port uint16
Tags map[string]string
Status string
ProtocolMin uint8
ProtocolMax uint8
ProtocolCur uint8
DelegateMin uint8
DelegateMax uint8
DelegateCur uint8
}
func nomadMember(m serf.Member) Member {
return Member{
Name: m.Name,
Addr: m.Addr,
Port: m.Port,
Tags: m.Tags,
Status: m.Status.String(),
ProtocolMin: m.ProtocolMin,
ProtocolMax: m.ProtocolMax,
ProtocolCur: m.ProtocolCur,
DelegateMin: m.DelegateMin,
DelegateMax: m.DelegateMax,
DelegateCur: m.DelegateCur,
}
}
func (s *HTTPServer) AgentSelfRequest(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
if req.Method != "GET" {
return nil, CodedError(405, ErrInvalidMethod)
}
var secret string
s.parseToken(req, &secret)
var aclObj *acl.ACL
var err error
// Get the member as a server
var member serf.Member
if srv := s.agent.Server(); srv != nil {
member = srv.LocalMember()
aclObj, err = srv.ResolveToken(secret)
} else {
// Not a Server; use the Client for token resolution
aclObj, err = s.agent.Client().ResolveToken(secret)
}
if err != nil {
return nil, err
}
// Check agent read permissions
if aclObj != nil && !aclObj.AllowAgentRead() {
return nil, structs.ErrPermissionDenied
}
self := agentSelf{
Member: nomadMember(member),
Stats: s.agent.Stats(),
}
if ac, err := copystructure.Copy(s.agent.config); err != nil {
return nil, CodedError(500, err.Error())
} else {
self.Config = ac.(*Config)
}
if self.Config != nil && self.Config.Vault != nil && self.Config.Vault.Token != "" {
self.Config.Vault.Token = "<redacted>"
}
return self, nil
}
func (s *HTTPServer) AgentJoinRequest(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
if req.Method != "PUT" && req.Method != "POST" {
return nil, CodedError(405, ErrInvalidMethod)
}
srv := s.agent.Server()
if srv == nil {
return nil, CodedError(501, ErrInvalidMethod)
}
// Get the join addresses
query := req.URL.Query()
addrs := query["address"]
if len(addrs) == 0 {
return nil, CodedError(400, "missing address to join")
}
// Attempt the join
num, err := srv.Join(addrs)
var errStr string
if err != nil {
errStr = err.Error()
}
return joinResult{num, errStr}, nil
}
func (s *HTTPServer) AgentMembersRequest(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
if req.Method != "GET" {
return nil, CodedError(405, ErrInvalidMethod)
}
args := &structs.GenericRequest{}
if s.parse(resp, req, &args.Region, &args.QueryOptions) {
return nil, nil
}
var out structs.ServerMembersResponse
if err := s.agent.RPC("Status.Members", args, &out); err != nil {
return nil, err
}
return out, nil
}
func (s *HTTPServer) AgentForceLeaveRequest(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
if req.Method != "PUT" && req.Method != "POST" {
return nil, CodedError(405, ErrInvalidMethod)
}
srv := s.agent.Server()
if srv == nil {
return nil, CodedError(501, ErrInvalidMethod)
}
var secret string
s.parseToken(req, &secret)
// Check agent write permissions
if aclObj, err := s.agent.Server().ResolveToken(secret); err != nil {
return nil, err
} else if aclObj != nil && !aclObj.AllowAgentWrite() {
return nil, structs.ErrPermissionDenied
}
// Get the node to eject
node := req.URL.Query().Get("node")
if node == "" {
return nil, CodedError(400, "missing node to force leave")
}
// Attempt remove
err := srv.RemoveFailedNode(node)
return nil, err
}
// AgentServersRequest is used to query the list of servers used by the Nomad
// Client for RPCs. This endpoint can also be used to update the list of
// servers for a given agent.
func (s *HTTPServer) AgentServersRequest(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
switch req.Method {
case "PUT", "POST":
return s.updateServers(resp, req)
case "GET":
return s.listServers(resp, req)
default:
return nil, CodedError(405, ErrInvalidMethod)
}
}
func (s *HTTPServer) listServers(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
client := s.agent.Client()
if client == nil {
return nil, CodedError(501, ErrInvalidMethod)
}
var secret string
s.parseToken(req, &secret)
// Check agent read permissions
if aclObj, err := s.agent.Client().ResolveToken(secret); err != nil {
return nil, err
} else if aclObj != nil && !aclObj.AllowAgentRead() {
return nil, structs.ErrPermissionDenied
}
peers := s.agent.client.GetServers()
sort.Strings(peers)
return peers, nil
}
func (s *HTTPServer) updateServers(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
client := s.agent.Client()
if client == nil {
return nil, CodedError(501, ErrInvalidMethod)
}
// Get the servers from the request
servers := req.URL.Query()["address"]
if len(servers) == 0 {
return nil, CodedError(400, "missing server address")
}
var secret string
s.parseToken(req, &secret)
// Check agent write permissions
if aclObj, err := s.agent.Client().ResolveToken(secret); err != nil {
return nil, err
} else if aclObj != nil && !aclObj.AllowAgentWrite() {
return nil, structs.ErrPermissionDenied
}
// Set the servers list into the client
s.agent.logger.Printf("[TRACE] Adding servers %+q to the client's primary server list", servers)
if err := client.SetServers(servers); err != nil {
s.agent.logger.Printf("[ERR] Attempt to add servers %q to client failed: %v", servers, err)
//TODO is this the right error to return?
return nil, CodedError(400, err.Error())
}
return nil, nil
}
// KeyringOperationRequest allows an operator to install/delete/use keys
func (s *HTTPServer) KeyringOperationRequest(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
srv := s.agent.Server()
if srv == nil {
return nil, CodedError(501, ErrInvalidMethod)
}
var secret string
s.parseToken(req, &secret)
// Check agent write permissions
if aclObj, err := srv.ResolveToken(secret); err != nil {
return nil, err
} else if aclObj != nil && !aclObj.AllowAgentWrite() {
return nil, structs.ErrPermissionDenied
}
kmgr := srv.KeyManager()
var sresp *serf.KeyResponse
var err error
// Get the key from the req body
var args structs.KeyringRequest
//Get the op
op := strings.TrimPrefix(req.URL.Path, "/v1/agent/keyring/")
switch op {
case "list":
sresp, err = kmgr.ListKeys()
case "install":
if err := decodeBody(req, &args); err != nil {
return nil, CodedError(500, err.Error())
}
sresp, err = kmgr.InstallKey(args.Key)
case "use":
if err := decodeBody(req, &args); err != nil {
return nil, CodedError(500, err.Error())
}
sresp, err = kmgr.UseKey(args.Key)
case "remove":
if err := decodeBody(req, &args); err != nil {
return nil, CodedError(500, err.Error())
}
sresp, err = kmgr.RemoveKey(args.Key)
default:
return nil, CodedError(404, "resource not found")
}
if err != nil {
return nil, err
}
kresp := structs.KeyringResponse{
Messages: sresp.Messages,
Keys: sresp.Keys,
NumNodes: sresp.NumNodes,
}
return kresp, nil
}
type agentSelf struct {
Config *Config `json:"config"`
Member Member `json:"member,omitempty"`
Stats map[string]map[string]string `json:"stats"`
}
type joinResult struct {
NumJoined int `json:"num_joined"`
Error string `json:"error"`
}
func (s *HTTPServer) HealthRequest(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
if req.Method != "GET" {
return nil, CodedError(405, ErrInvalidMethod)
}
var args structs.GenericRequest
if s.parse(resp, req, &args.Region, &args.QueryOptions) {
return nil, nil
}
health := healthResponse{}
getClient := true
getServer := true
// See if we're checking a specific agent type and default to failing
if healthType, ok := req.URL.Query()["type"]; ok {
getClient = false
getServer = false
for _, ht := range healthType {
switch ht {
case "client":
getClient = true
health.Client = &healthResponseAgent{
Ok: false,
Message: "client not enabled",
}
case "server":
getServer = true
health.Server = &healthResponseAgent{
Ok: false,
Message: "server not enabled",
}
}
}
}
// If we should check the client and it exists assume it's healthy
if client := s.agent.Client(); getClient && client != nil {
if len(client.GetServers()) == 0 {
health.Client = &healthResponseAgent{
Ok: false,
Message: "no known servers",
}
} else {
health.Client = &healthResponseAgent{
Ok: true,
Message: "ok",
}
}
}
// If we should check the server and it exists, see if there's a leader
if server := s.agent.Server(); getServer && server != nil {
health.Server = &healthResponseAgent{
Ok: true,
Message: "ok",
}
leader := ""
if err := s.agent.RPC("Status.Leader", &args, &leader); err != nil {
health.Server.Ok = false
health.Server.Message = err.Error()
} else if leader == "" {
health.Server.Ok = false
health.Server.Message = "no leader"
}
}
if health.ok() {
return &health, nil
}
jsonResp, err := json.Marshal(&health)
if err != nil {
return nil, err
}
return nil, CodedError(500, string(jsonResp))
}
type healthResponse struct {
Client *healthResponseAgent `json:"client,omitempty"`
Server *healthResponseAgent `json:"server,omitempty"`
}
// ok returns true as long as neither Client nor Server have Ok=false.
func (h healthResponse) ok() bool {
if h.Client != nil && !h.Client.Ok {
return false
}
if h.Server != nil && !h.Server.Ok {
return false
}
return true
}
type healthResponseAgent struct {
Ok bool `json:"ok"`
Message string `json:"message,omitempty"`
}