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operator_endpoint.go
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/
operator_endpoint.go
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package agent
import (
"fmt"
"net/http"
"strconv"
"strings"
"time"
"github.com/hashicorp/consul/agent/consul/structs"
"github.com/hashicorp/consul/api"
multierror "github.com/hashicorp/go-multierror"
"github.com/hashicorp/raft"
)
// OperatorRaftConfiguration is used to inspect the current Raft configuration.
// This supports the stale query mode in case the cluster doesn't have a leader.
func (s *HTTPServer) OperatorRaftConfiguration(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
if req.Method != "GET" {
resp.WriteHeader(http.StatusMethodNotAllowed)
return nil, nil
}
var args structs.DCSpecificRequest
if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
return nil, nil
}
var reply structs.RaftConfigurationResponse
if err := s.agent.RPC("Operator.RaftGetConfiguration", &args, &reply); err != nil {
return nil, err
}
return reply, nil
}
// OperatorRaftPeer supports actions on Raft peers. Currently we only support
// removing peers by address.
func (s *HTTPServer) OperatorRaftPeer(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
if req.Method != "DELETE" {
resp.WriteHeader(http.StatusMethodNotAllowed)
return nil, nil
}
var args structs.RaftRemovePeerRequest
s.parseDC(req, &args.Datacenter)
s.parseToken(req, &args.Token)
params := req.URL.Query()
_, hasID := params["id"]
if hasID {
args.ID = raft.ServerID(params.Get("id"))
}
_, hasAddress := params["address"]
if hasAddress {
args.Address = raft.ServerAddress(params.Get("address"))
}
if !hasID && !hasAddress {
resp.WriteHeader(http.StatusBadRequest)
fmt.Fprint(resp, "Must specify either ?id with the server's ID or ?address with IP:port of peer to remove")
return nil, nil
}
if hasID && hasAddress {
resp.WriteHeader(http.StatusBadRequest)
fmt.Fprint(resp, "Must specify only one of ?id or ?address")
return nil, nil
}
var reply struct{}
method := "Operator.RaftRemovePeerByID"
if hasAddress {
method = "Operator.RaftRemovePeerByAddress"
}
if err := s.agent.RPC(method, &args, &reply); err != nil {
return nil, err
}
return nil, nil
}
type keyringArgs struct {
Key string
Token string
RelayFactor uint8
}
// OperatorKeyringEndpoint handles keyring operations (install, list, use, remove)
func (s *HTTPServer) OperatorKeyringEndpoint(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
var args keyringArgs
if req.Method == "POST" || req.Method == "PUT" || req.Method == "DELETE" {
if err := decodeBody(req, &args, nil); err != nil {
resp.WriteHeader(400)
fmt.Fprintf(resp, "Request decode failed: %v", err)
return nil, nil
}
}
s.parseToken(req, &args.Token)
// Parse relay factor
if relayFactor := req.URL.Query().Get("relay-factor"); relayFactor != "" {
n, err := strconv.Atoi(relayFactor)
if err != nil {
resp.WriteHeader(400)
fmt.Fprintf(resp, "Error parsing relay factor: %v", err)
return nil, nil
}
args.RelayFactor, err = ParseRelayFactor(n)
if err != nil {
resp.WriteHeader(400)
fmt.Fprintf(resp, "Invalid relay factor: %v", err)
return nil, nil
}
}
// Switch on the method
switch req.Method {
case "GET":
return s.KeyringList(resp, req, &args)
case "POST":
return s.KeyringInstall(resp, req, &args)
case "PUT":
return s.KeyringUse(resp, req, &args)
case "DELETE":
return s.KeyringRemove(resp, req, &args)
default:
resp.WriteHeader(http.StatusMethodNotAllowed)
return nil, nil
}
}
// KeyringInstall is used to install a new gossip encryption key into the cluster
func (s *HTTPServer) KeyringInstall(resp http.ResponseWriter, req *http.Request, args *keyringArgs) (interface{}, error) {
responses, err := s.agent.InstallKey(args.Key, args.Token, args.RelayFactor)
if err != nil {
return nil, err
}
return nil, keyringErrorsOrNil(responses.Responses)
}
// KeyringList is used to list the keys installed in the cluster
func (s *HTTPServer) KeyringList(resp http.ResponseWriter, req *http.Request, args *keyringArgs) (interface{}, error) {
responses, err := s.agent.ListKeys(args.Token, args.RelayFactor)
if err != nil {
return nil, err
}
return responses.Responses, keyringErrorsOrNil(responses.Responses)
}
// KeyringRemove is used to list the keys installed in the cluster
func (s *HTTPServer) KeyringRemove(resp http.ResponseWriter, req *http.Request, args *keyringArgs) (interface{}, error) {
responses, err := s.agent.RemoveKey(args.Key, args.Token, args.RelayFactor)
if err != nil {
return nil, err
}
return nil, keyringErrorsOrNil(responses.Responses)
}
// KeyringUse is used to change the primary gossip encryption key
func (s *HTTPServer) KeyringUse(resp http.ResponseWriter, req *http.Request, args *keyringArgs) (interface{}, error) {
responses, err := s.agent.UseKey(args.Key, args.Token, args.RelayFactor)
if err != nil {
return nil, err
}
return nil, keyringErrorsOrNil(responses.Responses)
}
func keyringErrorsOrNil(responses []*structs.KeyringResponse) error {
var errs error
for _, response := range responses {
if response.Error != "" {
pool := response.Datacenter + " (LAN)"
if response.WAN {
pool = "WAN"
}
errs = multierror.Append(errs, fmt.Errorf("%s error: %s", pool, response.Error))
for key, message := range response.Messages {
errs = multierror.Append(errs, fmt.Errorf("%s: %s", key, message))
}
}
}
return errs
}
// OperatorAutopilotConfiguration is used to inspect the current Autopilot configuration.
// This supports the stale query mode in case the cluster doesn't have a leader.
func (s *HTTPServer) OperatorAutopilotConfiguration(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
// Switch on the method
switch req.Method {
case "GET":
var args structs.DCSpecificRequest
if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
return nil, nil
}
var reply structs.AutopilotConfig
if err := s.agent.RPC("Operator.AutopilotGetConfiguration", &args, &reply); err != nil {
return nil, err
}
out := api.AutopilotConfiguration{
CleanupDeadServers: reply.CleanupDeadServers,
LastContactThreshold: api.NewReadableDuration(reply.LastContactThreshold),
MaxTrailingLogs: reply.MaxTrailingLogs,
ServerStabilizationTime: api.NewReadableDuration(reply.ServerStabilizationTime),
RedundancyZoneTag: reply.RedundancyZoneTag,
DisableUpgradeMigration: reply.DisableUpgradeMigration,
CreateIndex: reply.CreateIndex,
ModifyIndex: reply.ModifyIndex,
}
return out, nil
case "PUT":
var args structs.AutopilotSetConfigRequest
s.parseDC(req, &args.Datacenter)
s.parseToken(req, &args.Token)
var conf api.AutopilotConfiguration
if err := decodeBody(req, &conf, FixupConfigDurations); err != nil {
resp.WriteHeader(400)
fmt.Fprintf(resp, "Error parsing autopilot config: %v", err)
return nil, nil
}
args.Config = structs.AutopilotConfig{
CleanupDeadServers: conf.CleanupDeadServers,
LastContactThreshold: conf.LastContactThreshold.Duration(),
MaxTrailingLogs: conf.MaxTrailingLogs,
ServerStabilizationTime: conf.ServerStabilizationTime.Duration(),
RedundancyZoneTag: conf.RedundancyZoneTag,
DisableUpgradeMigration: conf.DisableUpgradeMigration,
}
// Check for cas value
params := req.URL.Query()
if _, ok := params["cas"]; ok {
casVal, err := strconv.ParseUint(params.Get("cas"), 10, 64)
if err != nil {
resp.WriteHeader(400)
fmt.Fprintf(resp, "Error parsing cas value: %v", err)
return nil, nil
}
args.Config.ModifyIndex = casVal
args.CAS = true
}
var reply bool
if err := s.agent.RPC("Operator.AutopilotSetConfiguration", &args, &reply); err != nil {
return nil, err
}
// Only use the out value if this was a CAS
if !args.CAS {
return true, nil
}
return reply, nil
default:
resp.WriteHeader(http.StatusMethodNotAllowed)
return nil, nil
}
}
// FixupConfigDurations is used to handle parsing the duration fields in
// the Autopilot config struct
func FixupConfigDurations(raw interface{}) error {
rawMap, ok := raw.(map[string]interface{})
if !ok {
return nil
}
for key, val := range rawMap {
if strings.ToLower(key) == "lastcontactthreshold" ||
strings.ToLower(key) == "serverstabilizationtime" {
// Convert a string value into an integer
if vStr, ok := val.(string); ok {
dur, err := time.ParseDuration(vStr)
if err != nil {
return err
}
rawMap[key] = dur
}
}
}
return nil
}
// OperatorServerHealth is used to get the health of the servers in the local DC
func (s *HTTPServer) OperatorServerHealth(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
if req.Method != "GET" {
resp.WriteHeader(http.StatusMethodNotAllowed)
return nil, nil
}
var args structs.DCSpecificRequest
if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
return nil, nil
}
var reply structs.OperatorHealthReply
if err := s.agent.RPC("Operator.ServerHealth", &args, &reply); err != nil {
return nil, err
}
// Reply with status 429 if something is unhealthy
if !reply.Healthy {
resp.WriteHeader(http.StatusTooManyRequests)
}
out := &api.OperatorHealthReply{
Healthy: reply.Healthy,
FailureTolerance: reply.FailureTolerance,
}
for _, server := range reply.Servers {
out.Servers = append(out.Servers, api.ServerHealth{
ID: server.ID,
Name: server.Name,
Address: server.Address,
Version: server.Version,
Leader: server.Leader,
SerfStatus: server.SerfStatus.String(),
LastContact: api.NewReadableDuration(server.LastContact),
LastTerm: server.LastTerm,
LastIndex: server.LastIndex,
Healthy: server.Healthy,
Voter: server.Voter,
StableSince: server.StableSince.Round(time.Second).UTC(),
})
}
return out, nil
}