316 lines
9.0 KiB
Go
316 lines
9.0 KiB
Go
package agent
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import (
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"fmt"
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"net/http"
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"net/url"
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"strconv"
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"strings"
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"github.com/hashicorp/consul/agent/structs"
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"github.com/hashicorp/consul/api"
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)
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const (
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serviceHealth = "service"
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connectHealth = "connect"
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ingressHealth = "ingress"
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)
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func (s *HTTPHandlers) HealthChecksInState(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Set default DC
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args := structs.ChecksInStateRequest{}
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if err := s.parseEntMeta(req, &args.EnterpriseMeta); err != nil {
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return nil, err
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}
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s.parseSource(req, &args.Source)
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args.NodeMetaFilters = s.parseMetaFilter(req)
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if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
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return nil, nil
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}
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// Pull out the service name
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args.State = strings.TrimPrefix(req.URL.Path, "/v1/health/state/")
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if args.State == "" {
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resp.WriteHeader(http.StatusBadRequest)
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fmt.Fprint(resp, "Missing check state")
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return nil, nil
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}
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// Make the RPC request
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var out structs.IndexedHealthChecks
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defer setMeta(resp, &out.QueryMeta)
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RETRY_ONCE:
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if err := s.agent.RPC("Health.ChecksInState", &args, &out); err != nil {
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return nil, err
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}
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if args.QueryOptions.AllowStale && args.MaxStaleDuration > 0 && args.MaxStaleDuration < out.LastContact {
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args.AllowStale = false
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args.MaxStaleDuration = 0
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goto RETRY_ONCE
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}
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out.ConsistencyLevel = args.QueryOptions.ConsistencyLevel()
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// Use empty list instead of nil
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if out.HealthChecks == nil {
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out.HealthChecks = make(structs.HealthChecks, 0)
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}
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for i, c := range out.HealthChecks {
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if c.ServiceTags == nil {
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clone := *c
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clone.ServiceTags = make([]string, 0)
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out.HealthChecks[i] = &clone
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}
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}
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return out.HealthChecks, nil
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}
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func (s *HTTPHandlers) HealthNodeChecks(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Set default DC
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args := structs.NodeSpecificRequest{}
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if err := s.parseEntMeta(req, &args.EnterpriseMeta); err != nil {
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return nil, err
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}
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if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
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return nil, nil
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}
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// Pull out the service name
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args.Node = strings.TrimPrefix(req.URL.Path, "/v1/health/node/")
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if args.Node == "" {
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resp.WriteHeader(http.StatusBadRequest)
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fmt.Fprint(resp, "Missing node name")
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return nil, nil
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}
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// Make the RPC request
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var out structs.IndexedHealthChecks
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defer setMeta(resp, &out.QueryMeta)
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RETRY_ONCE:
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if err := s.agent.RPC("Health.NodeChecks", &args, &out); err != nil {
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return nil, err
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}
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if args.QueryOptions.AllowStale && args.MaxStaleDuration > 0 && args.MaxStaleDuration < out.LastContact {
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args.AllowStale = false
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args.MaxStaleDuration = 0
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goto RETRY_ONCE
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}
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out.ConsistencyLevel = args.QueryOptions.ConsistencyLevel()
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// Use empty list instead of nil
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if out.HealthChecks == nil {
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out.HealthChecks = make(structs.HealthChecks, 0)
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}
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for i, c := range out.HealthChecks {
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if c.ServiceTags == nil {
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clone := *c
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clone.ServiceTags = make([]string, 0)
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out.HealthChecks[i] = &clone
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}
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}
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return out.HealthChecks, nil
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}
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func (s *HTTPHandlers) HealthServiceChecks(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Set default DC
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args := structs.ServiceSpecificRequest{}
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if err := s.parseEntMetaNoWildcard(req, &args.EnterpriseMeta); err != nil {
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return nil, err
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}
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s.parseSource(req, &args.Source)
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args.NodeMetaFilters = s.parseMetaFilter(req)
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if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
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return nil, nil
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}
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// Pull out the service name
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args.ServiceName = strings.TrimPrefix(req.URL.Path, "/v1/health/checks/")
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if args.ServiceName == "" {
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resp.WriteHeader(http.StatusBadRequest)
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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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// Make the RPC request
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var out structs.IndexedHealthChecks
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defer setMeta(resp, &out.QueryMeta)
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RETRY_ONCE:
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if err := s.agent.RPC("Health.ServiceChecks", &args, &out); err != nil {
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return nil, err
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}
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if args.QueryOptions.AllowStale && args.MaxStaleDuration > 0 && args.MaxStaleDuration < out.LastContact {
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args.AllowStale = false
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args.MaxStaleDuration = 0
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goto RETRY_ONCE
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}
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out.ConsistencyLevel = args.QueryOptions.ConsistencyLevel()
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// Use empty list instead of nil
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if out.HealthChecks == nil {
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out.HealthChecks = make(structs.HealthChecks, 0)
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}
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for i, c := range out.HealthChecks {
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if c.ServiceTags == nil {
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clone := *c
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clone.ServiceTags = make([]string, 0)
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out.HealthChecks[i] = &clone
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}
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}
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return out.HealthChecks, nil
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}
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// HealthIngressServiceNodes should return "all the healthy ingress gateway instances
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// that I can use to access this connect-enabled service without mTLS".
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func (s *HTTPHandlers) HealthIngressServiceNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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return s.healthServiceNodes(resp, req, ingressHealth)
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}
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// HealthConnectServiceNodes should return "all healthy connect-enabled
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// endpoints (e.g. could be side car proxies or native instances) for this
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// service so I can connect with mTLS".
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func (s *HTTPHandlers) HealthConnectServiceNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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return s.healthServiceNodes(resp, req, connectHealth)
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}
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// HealthServiceNodes should return "all the healthy instances of this service
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// registered so I can connect directly to them".
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func (s *HTTPHandlers) HealthServiceNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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return s.healthServiceNodes(resp, req, serviceHealth)
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}
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func (s *HTTPHandlers) healthServiceNodes(resp http.ResponseWriter, req *http.Request, healthType string) (interface{}, error) {
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// Set default DC
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args := structs.ServiceSpecificRequest{}
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if err := s.parseEntMetaNoWildcard(req, &args.EnterpriseMeta); err != nil {
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return nil, err
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}
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s.parseSource(req, &args.Source)
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args.NodeMetaFilters = s.parseMetaFilter(req)
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if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
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return nil, nil
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}
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// Check for tags
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params := req.URL.Query()
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if _, ok := params["tag"]; ok {
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args.ServiceTags = params["tag"]
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args.TagFilter = true
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}
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// Determine the prefix
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var prefix string
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switch healthType {
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case connectHealth:
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prefix = "/v1/health/connect/"
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args.Connect = true
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case ingressHealth:
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prefix = "/v1/health/ingress/"
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args.Ingress = true
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default:
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// serviceHealth is the default type
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prefix = "/v1/health/service/"
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}
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// Pull out the service name
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args.ServiceName = strings.TrimPrefix(req.URL.Path, prefix)
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if args.ServiceName == "" {
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resp.WriteHeader(http.StatusBadRequest)
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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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out, md, err := s.agent.rpcClientHealth.ServiceNodes(req.Context(), args)
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if err != nil {
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return nil, err
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}
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if args.QueryOptions.UseCache {
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setCacheMeta(resp, &md)
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}
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out.QueryMeta.ConsistencyLevel = args.QueryOptions.ConsistencyLevel()
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setMeta(resp, &out.QueryMeta)
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// FIXME: argument parsing should be done before performing the rpc
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// Filter to only passing if specified
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filter, err := getBoolQueryParam(params, api.HealthPassing)
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if err != nil {
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resp.WriteHeader(http.StatusBadRequest)
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fmt.Fprint(resp, "Invalid value for ?passing")
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return nil, nil
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}
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// FIXME: remove filterNonPassing, replace with nodes.Filter, which is used by DNSServer
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if filter {
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out.Nodes = filterNonPassing(out.Nodes)
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}
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// Translate addresses after filtering so we don't waste effort.
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s.agent.TranslateAddresses(args.Datacenter, out.Nodes, TranslateAddressAcceptAny)
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// Use empty list instead of nil
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if out.Nodes == nil {
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out.Nodes = make(structs.CheckServiceNodes, 0)
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}
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for i := range out.Nodes {
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if out.Nodes[i].Checks == nil {
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out.Nodes[i].Checks = make(structs.HealthChecks, 0)
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}
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for j, c := range out.Nodes[i].Checks {
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if c.ServiceTags == nil {
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clone := *c
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clone.ServiceTags = make([]string, 0)
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out.Nodes[i].Checks[j] = &clone
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}
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}
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if out.Nodes[i].Service != nil && out.Nodes[i].Service.Tags == nil {
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clone := *out.Nodes[i].Service
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clone.Tags = make([]string, 0)
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out.Nodes[i].Service = &clone
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}
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}
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return out.Nodes, nil
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}
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func getBoolQueryParam(params url.Values, key string) (bool, error) {
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var param bool
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if _, ok := params[key]; ok {
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val := params.Get(key)
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// Orginally a comment declared this check should be removed after Consul
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// 0.10, to no longer support using ?passing without a value. However, I
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// think this is a reasonable experience for a user and so am keeping it
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// here.
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if val == "" {
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param = true
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} else {
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var err error
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param, err = strconv.ParseBool(val)
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if err != nil {
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return false, err
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}
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}
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}
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return param, nil
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}
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// filterNonPassing is used to filter out any nodes that have check that are not passing
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func filterNonPassing(nodes structs.CheckServiceNodes) structs.CheckServiceNodes {
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n := len(nodes)
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// Make a copy of the cached nodes rather than operating on the cache directly
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out := append(nodes[:0:0], nodes...)
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OUTER:
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for i := 0; i < n; i++ {
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node := out[i]
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for _, check := range node.Checks {
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if check.Status != api.HealthPassing {
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out[i], out[n-1] = out[n-1], structs.CheckServiceNode{}
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n--
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i--
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continue OUTER
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}
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}
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}
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return out[:n]
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}
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