mirror of https://github.com/status-im/consul.git
700 lines
18 KiB
Go
700 lines
18 KiB
Go
package agent
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import (
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"fmt"
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"log"
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"net/http"
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"strconv"
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"strings"
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"github.com/hashicorp/consul/api"
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"github.com/hashicorp/consul/consul/structs"
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"github.com/hashicorp/consul/logger"
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"github.com/hashicorp/consul/types"
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"github.com/hashicorp/logutils"
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"github.com/hashicorp/serf/coordinate"
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"github.com/hashicorp/serf/serf"
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)
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type Self struct {
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Config *Config
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Coord *coordinate.Coordinate
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Member serf.Member
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Stats map[string]map[string]string
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Meta map[string]string
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}
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func (s *HTTPServer) AgentSelf(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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var c *coordinate.Coordinate
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if !s.agent.config.DisableCoordinates {
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var err error
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if c, err = s.agent.GetCoordinate(); err != nil {
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return nil, err
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}
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}
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// Fetch the ACL token, if any, and enforce agent policy.
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var token string
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s.parseToken(req, &token)
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acl, err := s.agent.resolveToken(token)
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if err != nil {
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return nil, err
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}
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if acl != nil && !acl.AgentRead(s.agent.config.NodeName) {
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return nil, errPermissionDenied
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}
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return Self{
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Config: s.agent.config,
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Coord: c,
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Member: s.agent.LocalMember(),
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Stats: s.agent.Stats(),
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Meta: s.agent.state.Metadata(),
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}, nil
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}
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func (s *HTTPServer) AgentReload(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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if req.Method != "PUT" {
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resp.WriteHeader(http.StatusMethodNotAllowed)
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return nil, nil
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}
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// Fetch the ACL token, if any, and enforce agent policy.
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var token string
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s.parseToken(req, &token)
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acl, err := s.agent.resolveToken(token)
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if err != nil {
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return nil, err
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}
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if acl != nil && !acl.AgentWrite(s.agent.config.NodeName) {
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return nil, errPermissionDenied
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}
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// Trigger the reload
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errCh := make(chan error, 0)
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select {
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case <-s.agent.ShutdownCh():
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return nil, fmt.Errorf("Agent was shutdown before reload could be completed")
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case s.agent.reloadCh <- errCh:
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}
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// Wait for the result of the reload, or for the agent to shutdown
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select {
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case <-s.agent.ShutdownCh():
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return nil, fmt.Errorf("Agent was shutdown before reload could be completed")
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case err := <-errCh:
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return nil, err
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}
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}
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func (s *HTTPServer) AgentServices(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Fetch the ACL token, if any.
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var token string
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s.parseToken(req, &token)
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services := s.agent.state.Services()
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if err := s.agent.filterServices(token, &services); err != nil {
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return nil, err
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}
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// Use empty list instead of nil
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for _, s := range services {
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if s.Tags == nil {
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s.Tags = make([]string, 0)
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}
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}
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return services, nil
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}
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func (s *HTTPServer) AgentChecks(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Fetch the ACL token, if any.
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var token string
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s.parseToken(req, &token)
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checks := s.agent.state.Checks()
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if err := s.agent.filterChecks(token, &checks); err != nil {
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return nil, err
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}
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// Use empty list instead of nil
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for _, c := range checks {
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if c.ServiceTags == nil {
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c.ServiceTags = make([]string, 0)
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}
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}
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return checks, nil
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}
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func (s *HTTPServer) AgentMembers(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Fetch the ACL token, if any.
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var token string
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s.parseToken(req, &token)
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// Check if the WAN is being queried
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wan := false
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if other := req.URL.Query().Get("wan"); other != "" {
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wan = true
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}
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var members []serf.Member
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if wan {
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members = s.agent.WANMembers()
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} else {
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members = s.agent.LANMembers()
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}
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if err := s.agent.filterMembers(token, &members); err != nil {
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return nil, err
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}
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return members, nil
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}
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func (s *HTTPServer) AgentJoin(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Fetch the ACL token, if any, and enforce agent policy.
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var token string
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s.parseToken(req, &token)
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acl, err := s.agent.resolveToken(token)
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if err != nil {
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return nil, err
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}
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if acl != nil && !acl.AgentWrite(s.agent.config.NodeName) {
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return nil, errPermissionDenied
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}
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// Check if the WAN is being queried
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wan := false
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if other := req.URL.Query().Get("wan"); other != "" {
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wan = true
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}
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// Get the address
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addr := strings.TrimPrefix(req.URL.Path, "/v1/agent/join/")
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if wan {
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_, err = s.agent.JoinWAN([]string{addr})
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} else {
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_, err = s.agent.JoinLAN([]string{addr})
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}
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return nil, err
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}
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func (s *HTTPServer) AgentLeave(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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if req.Method != "PUT" {
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resp.WriteHeader(http.StatusMethodNotAllowed)
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return nil, nil
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}
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// Fetch the ACL token, if any, and enforce agent policy.
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var token string
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s.parseToken(req, &token)
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acl, err := s.agent.resolveToken(token)
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if err != nil {
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return nil, err
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}
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if acl != nil && !acl.AgentWrite(s.agent.config.NodeName) {
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return nil, errPermissionDenied
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}
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if err := s.agent.Leave(); err != nil {
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return nil, err
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}
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return nil, s.agent.Shutdown()
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}
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func (s *HTTPServer) AgentForceLeave(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Fetch the ACL token, if any, and enforce agent policy.
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var token string
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s.parseToken(req, &token)
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acl, err := s.agent.resolveToken(token)
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if err != nil {
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return nil, err
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}
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if acl != nil && !acl.AgentWrite(s.agent.config.NodeName) {
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return nil, errPermissionDenied
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}
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addr := strings.TrimPrefix(req.URL.Path, "/v1/agent/force-leave/")
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return nil, s.agent.ForceLeave(addr)
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}
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// syncChanges is a helper function which wraps a blocking call to sync
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// services and checks to the server. If the operation fails, we only
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// only warn because the write did succeed and anti-entropy will sync later.
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func (s *HTTPServer) syncChanges() {
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if err := s.agent.state.syncChanges(); err != nil {
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s.logger.Printf("[ERR] agent: failed to sync changes: %v", err)
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}
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}
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const invalidCheckMessage = "Must provide TTL or Script/DockerContainerID/HTTP/TCP and Interval"
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func (s *HTTPServer) AgentRegisterCheck(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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var args CheckDefinition
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// Fixup the type decode of TTL or Interval.
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decodeCB := func(raw interface{}) error {
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return FixupCheckType(raw)
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}
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if err := decodeBody(req, &args, decodeCB); err != nil {
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resp.WriteHeader(400)
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fmt.Fprintf(resp, "Request decode failed: %v", err)
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return nil, nil
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}
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// Verify the check has a name.
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if args.Name == "" {
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resp.WriteHeader(400)
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fmt.Fprint(resp, "Missing check name")
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return nil, nil
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}
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if args.Status != "" && !structs.ValidStatus(args.Status) {
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resp.WriteHeader(400)
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fmt.Fprint(resp, "Bad check status")
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return nil, nil
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}
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// Construct the health check.
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health := args.HealthCheck(s.agent.config.NodeName)
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// Verify the check type.
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chkType := &args.CheckType
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if !chkType.Valid() {
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resp.WriteHeader(400)
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fmt.Fprint(resp, invalidCheckMessage)
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return nil, nil
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}
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// Get the provided token, if any, and vet against any ACL policies.
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var token string
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s.parseToken(req, &token)
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if err := s.agent.vetCheckRegister(token, health); err != nil {
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return nil, err
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}
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// Add the check.
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if err := s.agent.AddCheck(health, chkType, true, token); err != nil {
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return nil, err
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}
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s.syncChanges()
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return nil, nil
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}
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func (s *HTTPServer) AgentDeregisterCheck(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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checkID := types.CheckID(strings.TrimPrefix(req.URL.Path, "/v1/agent/check/deregister/"))
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// Get the provided token, if any, and vet against any ACL policies.
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var token string
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s.parseToken(req, &token)
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if err := s.agent.vetCheckUpdate(token, checkID); err != nil {
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return nil, err
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}
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if err := s.agent.RemoveCheck(checkID, true); err != nil {
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return nil, err
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}
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s.syncChanges()
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return nil, nil
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}
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func (s *HTTPServer) AgentCheckPass(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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checkID := types.CheckID(strings.TrimPrefix(req.URL.Path, "/v1/agent/check/pass/"))
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note := req.URL.Query().Get("note")
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// Get the provided token, if any, and vet against any ACL policies.
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var token string
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s.parseToken(req, &token)
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if err := s.agent.vetCheckUpdate(token, checkID); err != nil {
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return nil, err
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}
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if err := s.agent.updateTTLCheck(checkID, api.HealthPassing, note); err != nil {
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return nil, err
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}
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s.syncChanges()
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return nil, nil
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}
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func (s *HTTPServer) AgentCheckWarn(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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checkID := types.CheckID(strings.TrimPrefix(req.URL.Path, "/v1/agent/check/warn/"))
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note := req.URL.Query().Get("note")
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// Get the provided token, if any, and vet against any ACL policies.
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var token string
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s.parseToken(req, &token)
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if err := s.agent.vetCheckUpdate(token, checkID); err != nil {
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return nil, err
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}
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if err := s.agent.updateTTLCheck(checkID, api.HealthWarning, note); err != nil {
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return nil, err
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}
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s.syncChanges()
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return nil, nil
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}
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func (s *HTTPServer) AgentCheckFail(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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checkID := types.CheckID(strings.TrimPrefix(req.URL.Path, "/v1/agent/check/fail/"))
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note := req.URL.Query().Get("note")
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// Get the provided token, if any, and vet against any ACL policies.
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var token string
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s.parseToken(req, &token)
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if err := s.agent.vetCheckUpdate(token, checkID); err != nil {
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return nil, err
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}
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if err := s.agent.updateTTLCheck(checkID, api.HealthCritical, note); err != nil {
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return nil, err
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}
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s.syncChanges()
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return nil, nil
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}
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// checkUpdate is the payload for a PUT to AgentCheckUpdate.
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type checkUpdate struct {
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// Status us one of the api.Health* states, "passing", "warning", or
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// "critical".
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Status string
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// Output is the information to post to the UI for operators as the
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// output of the process that decided to hit the TTL check. This is
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// different from the note field that's associated with the check
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// itself.
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Output string
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}
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// AgentCheckUpdate is a PUT-based alternative to the GET-based Pass/Warn/Fail
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// APIs.
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func (s *HTTPServer) AgentCheckUpdate(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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if req.Method != "PUT" {
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resp.WriteHeader(405)
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return nil, nil
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}
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var update checkUpdate
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if err := decodeBody(req, &update, nil); err != nil {
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resp.WriteHeader(400)
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fmt.Fprintf(resp, "Request decode failed: %v", err)
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return nil, nil
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}
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switch update.Status {
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case api.HealthPassing:
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case api.HealthWarning:
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case api.HealthCritical:
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default:
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resp.WriteHeader(400)
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fmt.Fprintf(resp, "Invalid check status: '%s'", update.Status)
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return nil, nil
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}
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total := len(update.Output)
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if total > CheckBufSize {
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update.Output = fmt.Sprintf("%s ... (captured %d of %d bytes)",
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update.Output[:CheckBufSize], CheckBufSize, total)
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}
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checkID := types.CheckID(strings.TrimPrefix(req.URL.Path, "/v1/agent/check/update/"))
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// Get the provided token, if any, and vet against any ACL policies.
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var token string
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s.parseToken(req, &token)
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if err := s.agent.vetCheckUpdate(token, checkID); err != nil {
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return nil, err
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}
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if err := s.agent.updateTTLCheck(checkID, update.Status, update.Output); err != nil {
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return nil, err
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}
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s.syncChanges()
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return nil, nil
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}
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func (s *HTTPServer) AgentRegisterService(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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var args ServiceDefinition
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// Fixup the type decode of TTL or Interval if a check if provided.
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decodeCB := func(raw interface{}) error {
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rawMap, ok := raw.(map[string]interface{})
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if !ok {
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return nil
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}
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for k, v := range rawMap {
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switch strings.ToLower(k) {
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case "check":
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if err := FixupCheckType(v); err != nil {
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return err
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}
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case "checks":
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chkTypes, ok := v.([]interface{})
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if !ok {
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continue
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}
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for _, chkType := range chkTypes {
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if err := FixupCheckType(chkType); err != nil {
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return err
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}
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}
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}
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}
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return nil
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}
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if err := decodeBody(req, &args, decodeCB); err != nil {
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resp.WriteHeader(400)
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fmt.Fprintf(resp, "Request decode failed: %v", err)
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return nil, nil
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}
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// Verify the service has a name.
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if args.Name == "" {
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resp.WriteHeader(400)
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fmt.Fprint(resp, "Missing service name")
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return nil, nil
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}
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// Check the service address here and in the catalog RPC endpoint
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// since service registration isn't sychronous.
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if args.Address == "0.0.0.0" {
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resp.WriteHeader(400)
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fmt.Fprintf(resp, "Invalid service address")
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return nil, nil
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}
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// Get the node service.
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ns := args.NodeService()
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// Verify the check type.
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chkTypes := args.CheckTypes()
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for _, check := range chkTypes {
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if check.Status != "" && !structs.ValidStatus(check.Status) {
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resp.WriteHeader(400)
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fmt.Fprint(resp, "Status for checks must 'passing', 'warning', 'critical'")
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return nil, nil
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}
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if !check.Valid() {
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resp.WriteHeader(400)
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fmt.Fprint(resp, invalidCheckMessage)
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return nil, nil
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}
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}
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// Get the provided token, if any, and vet against any ACL policies.
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var token string
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s.parseToken(req, &token)
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if err := s.agent.vetServiceRegister(token, ns); err != nil {
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return nil, err
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}
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// Add the service.
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if err := s.agent.AddService(ns, chkTypes, true, token); err != nil {
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return nil, err
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}
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s.syncChanges()
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return nil, nil
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}
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func (s *HTTPServer) AgentDeregisterService(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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serviceID := strings.TrimPrefix(req.URL.Path, "/v1/agent/service/deregister/")
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// Get the provided token, if any, and vet against any ACL policies.
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var token string
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s.parseToken(req, &token)
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if err := s.agent.vetServiceUpdate(token, serviceID); err != nil {
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return nil, err
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}
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if err := s.agent.RemoveService(serviceID, true); err != nil {
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return nil, err
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}
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s.syncChanges()
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return nil, nil
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}
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func (s *HTTPServer) AgentServiceMaintenance(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Only PUT supported
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if req.Method != "PUT" {
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resp.WriteHeader(405)
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return nil, nil
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}
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// Ensure we have a service ID
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serviceID := strings.TrimPrefix(req.URL.Path, "/v1/agent/service/maintenance/")
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if serviceID == "" {
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resp.WriteHeader(400)
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fmt.Fprint(resp, "Missing service ID")
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return nil, nil
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}
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// Ensure we have some action
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params := req.URL.Query()
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if _, ok := params["enable"]; !ok {
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resp.WriteHeader(400)
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fmt.Fprint(resp, "Missing value for enable")
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return nil, nil
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}
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raw := params.Get("enable")
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|
enable, err := strconv.ParseBool(raw)
|
|
if err != nil {
|
|
resp.WriteHeader(400)
|
|
fmt.Fprintf(resp, "Invalid value for enable: %q", raw)
|
|
return nil, nil
|
|
}
|
|
|
|
// Get the provided token, if any, and vet against any ACL policies.
|
|
var token string
|
|
s.parseToken(req, &token)
|
|
if err := s.agent.vetServiceUpdate(token, serviceID); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if enable {
|
|
reason := params.Get("reason")
|
|
if err = s.agent.EnableServiceMaintenance(serviceID, reason, token); err != nil {
|
|
resp.WriteHeader(404)
|
|
fmt.Fprint(resp, err.Error())
|
|
return nil, nil
|
|
}
|
|
} else {
|
|
if err = s.agent.DisableServiceMaintenance(serviceID); err != nil {
|
|
resp.WriteHeader(404)
|
|
fmt.Fprint(resp, err.Error())
|
|
return nil, nil
|
|
}
|
|
}
|
|
s.syncChanges()
|
|
return nil, nil
|
|
}
|
|
|
|
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)
|
|
fmt.Fprint(resp, "Missing value for enable")
|
|
return nil, nil
|
|
}
|
|
|
|
raw := params.Get("enable")
|
|
enable, err := strconv.ParseBool(raw)
|
|
if err != nil {
|
|
resp.WriteHeader(400)
|
|
fmt.Fprintf(resp, "Invalid value for enable: %q", raw)
|
|
return nil, nil
|
|
}
|
|
|
|
// Get the provided token, if any, and vet against any ACL policies.
|
|
var token string
|
|
s.parseToken(req, &token)
|
|
acl, err := s.agent.resolveToken(token)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if acl != nil && !acl.NodeWrite(s.agent.config.NodeName) {
|
|
return nil, errPermissionDenied
|
|
}
|
|
|
|
if enable {
|
|
s.agent.EnableNodeMaintenance(params.Get("reason"), token)
|
|
} else {
|
|
s.agent.DisableNodeMaintenance()
|
|
}
|
|
s.syncChanges()
|
|
return nil, nil
|
|
}
|
|
|
|
func (s *HTTPServer) AgentMonitor(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
|
|
// Only GET supported.
|
|
if req.Method != "GET" {
|
|
resp.WriteHeader(405)
|
|
return nil, nil
|
|
}
|
|
|
|
// Fetch the ACL token, if any, and enforce agent policy.
|
|
var token string
|
|
s.parseToken(req, &token)
|
|
acl, err := s.agent.resolveToken(token)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if acl != nil && !acl.AgentRead(s.agent.config.NodeName) {
|
|
return nil, errPermissionDenied
|
|
}
|
|
|
|
// Get the provided loglevel.
|
|
logLevel := req.URL.Query().Get("loglevel")
|
|
if logLevel == "" {
|
|
logLevel = "INFO"
|
|
}
|
|
|
|
// Upper case the level since that's required by the filter.
|
|
logLevel = strings.ToUpper(logLevel)
|
|
|
|
// Create a level filter and flusher.
|
|
filter := logger.LevelFilter()
|
|
filter.MinLevel = logutils.LogLevel(logLevel)
|
|
if !logger.ValidateLevelFilter(filter.MinLevel, filter) {
|
|
resp.WriteHeader(400)
|
|
fmt.Fprintf(resp, "Unknown log level: %s", filter.MinLevel)
|
|
return nil, nil
|
|
}
|
|
flusher, ok := resp.(http.Flusher)
|
|
if !ok {
|
|
return nil, fmt.Errorf("Streaming not supported")
|
|
}
|
|
|
|
// Set up a log handler.
|
|
handler := &httpLogHandler{
|
|
filter: filter,
|
|
logCh: make(chan string, 512),
|
|
logger: s.logger,
|
|
}
|
|
s.agent.logWriter.RegisterHandler(handler)
|
|
defer s.agent.logWriter.DeregisterHandler(handler)
|
|
notify := resp.(http.CloseNotifier).CloseNotify()
|
|
|
|
// Stream logs until the connection is closed.
|
|
for {
|
|
select {
|
|
case <-notify:
|
|
s.agent.logWriter.DeregisterHandler(handler)
|
|
if handler.droppedCount > 0 {
|
|
s.agent.logger.Printf("[WARN] agent: Dropped %d logs during monitor request", handler.droppedCount)
|
|
}
|
|
return nil, nil
|
|
case log := <-handler.logCh:
|
|
fmt.Fprintln(resp, log)
|
|
flusher.Flush()
|
|
}
|
|
}
|
|
}
|
|
|
|
type httpLogHandler struct {
|
|
filter *logutils.LevelFilter
|
|
logCh chan string
|
|
logger *log.Logger
|
|
droppedCount int
|
|
}
|
|
|
|
func (h *httpLogHandler) HandleLog(log string) {
|
|
// Check the log level
|
|
if !h.filter.Check([]byte(log)) {
|
|
return
|
|
}
|
|
|
|
// Do a non-blocking send
|
|
select {
|
|
case h.logCh <- log:
|
|
default:
|
|
// Just increment a counter for dropped logs to this handler; we can't log now
|
|
// because the lock is already held by the LogWriter invoking this
|
|
h.droppedCount++
|
|
}
|
|
}
|