package agent import ( "fmt" "net/http" "strconv" "strings" cachetype "github.com/hashicorp/consul/agent/cache-types" "github.com/hashicorp/consul/agent/structs" "github.com/hashicorp/consul/api" ) func (s *HTTPServer) HealthChecksInState(resp http.ResponseWriter, req *http.Request) (interface{}, error) { // Set default DC args := structs.ChecksInStateRequest{} if err := s.parseEntMeta(req, &args.EnterpriseMeta); err != nil { return nil, err } s.parseSource(req, &args.Source) args.NodeMetaFilters = s.parseMetaFilter(req) if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done { return nil, nil } // Pull out the service name args.State = strings.TrimPrefix(req.URL.Path, "/v1/health/state/") if args.State == "" { resp.WriteHeader(http.StatusBadRequest) fmt.Fprint(resp, "Missing check state") return nil, nil } // Make the RPC request var out structs.IndexedHealthChecks defer setMeta(resp, &out.QueryMeta) RETRY_ONCE: if err := s.agent.RPC("Health.ChecksInState", &args, &out); err != nil { return nil, err } if args.QueryOptions.AllowStale && args.MaxStaleDuration > 0 && args.MaxStaleDuration < out.LastContact { args.AllowStale = false args.MaxStaleDuration = 0 goto RETRY_ONCE } out.ConsistencyLevel = args.QueryOptions.ConsistencyLevel() // Use empty list instead of nil if out.HealthChecks == nil { out.HealthChecks = make(structs.HealthChecks, 0) } for i, c := range out.HealthChecks { if c.ServiceTags == nil { clone := *c clone.ServiceTags = make([]string, 0) out.HealthChecks[i] = &clone } } return out.HealthChecks, nil } func (s *HTTPServer) HealthNodeChecks(resp http.ResponseWriter, req *http.Request) (interface{}, error) { // Set default DC args := structs.NodeSpecificRequest{} if err := s.parseEntMeta(req, &args.EnterpriseMeta); err != nil { return nil, err } if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done { return nil, nil } // Pull out the service name args.Node = strings.TrimPrefix(req.URL.Path, "/v1/health/node/") if args.Node == "" { resp.WriteHeader(http.StatusBadRequest) fmt.Fprint(resp, "Missing node name") return nil, nil } // Make the RPC request var out structs.IndexedHealthChecks defer setMeta(resp, &out.QueryMeta) RETRY_ONCE: if err := s.agent.RPC("Health.NodeChecks", &args, &out); err != nil { return nil, err } if args.QueryOptions.AllowStale && args.MaxStaleDuration > 0 && args.MaxStaleDuration < out.LastContact { args.AllowStale = false args.MaxStaleDuration = 0 goto RETRY_ONCE } out.ConsistencyLevel = args.QueryOptions.ConsistencyLevel() // Use empty list instead of nil if out.HealthChecks == nil { out.HealthChecks = make(structs.HealthChecks, 0) } for i, c := range out.HealthChecks { if c.ServiceTags == nil { clone := *c clone.ServiceTags = make([]string, 0) out.HealthChecks[i] = &clone } } return out.HealthChecks, nil } func (s *HTTPServer) HealthServiceChecks(resp http.ResponseWriter, req *http.Request) (interface{}, error) { // Set default DC args := structs.ServiceSpecificRequest{} if err := s.parseEntMeta(req, &args.EnterpriseMeta); err != nil { return nil, err } s.parseSource(req, &args.Source) args.NodeMetaFilters = s.parseMetaFilter(req) if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done { return nil, nil } // Pull out the service name args.ServiceName = strings.TrimPrefix(req.URL.Path, "/v1/health/checks/") if args.ServiceName == "" { resp.WriteHeader(http.StatusBadRequest) fmt.Fprint(resp, "Missing service name") return nil, nil } // Make the RPC request var out structs.IndexedHealthChecks defer setMeta(resp, &out.QueryMeta) RETRY_ONCE: if err := s.agent.RPC("Health.ServiceChecks", &args, &out); err != nil { return nil, err } if args.QueryOptions.AllowStale && args.MaxStaleDuration > 0 && args.MaxStaleDuration < out.LastContact { args.AllowStale = false args.MaxStaleDuration = 0 goto RETRY_ONCE } out.ConsistencyLevel = args.QueryOptions.ConsistencyLevel() // Use empty list instead of nil if out.HealthChecks == nil { out.HealthChecks = make(structs.HealthChecks, 0) } for i, c := range out.HealthChecks { if c.ServiceTags == nil { clone := *c clone.ServiceTags = make([]string, 0) out.HealthChecks[i] = &clone } } return out.HealthChecks, nil } func (s *HTTPServer) HealthConnectServiceNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) { return s.healthServiceNodes(resp, req, true) } func (s *HTTPServer) HealthServiceNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) { return s.healthServiceNodes(resp, req, false) } func (s *HTTPServer) healthServiceNodes(resp http.ResponseWriter, req *http.Request, connect bool) (interface{}, error) { // Set default DC args := structs.ServiceSpecificRequest{Connect: connect} if err := s.parseEntMeta(req, &args.EnterpriseMeta); err != nil { return nil, err } s.parseSource(req, &args.Source) args.NodeMetaFilters = s.parseMetaFilter(req) if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done { return nil, nil } // Check for tags params := req.URL.Query() if _, ok := params["tag"]; ok { args.ServiceTags = params["tag"] args.TagFilter = true } // Determine the prefix prefix := "/v1/health/service/" if connect { prefix = "/v1/health/connect/" } // Pull out the service name args.ServiceName = strings.TrimPrefix(req.URL.Path, prefix) if args.ServiceName == "" { resp.WriteHeader(http.StatusBadRequest) fmt.Fprint(resp, "Missing service name") return nil, nil } // Make the RPC request var out structs.IndexedCheckServiceNodes defer setMeta(resp, &out.QueryMeta) if args.QueryOptions.UseCache { raw, m, err := s.agent.cache.Get(cachetype.HealthServicesName, &args) if err != nil { return nil, err } defer setCacheMeta(resp, &m) reply, ok := raw.(*structs.IndexedCheckServiceNodes) if !ok { // This should never happen, but we want to protect against panics return nil, fmt.Errorf("internal error: response type not correct") } out = *reply } else { RETRY_ONCE: if err := s.agent.RPC("Health.ServiceNodes", &args, &out); err != nil { return nil, err } if args.QueryOptions.AllowStale && args.MaxStaleDuration > 0 && args.MaxStaleDuration < out.LastContact { args.AllowStale = false args.MaxStaleDuration = 0 goto RETRY_ONCE } } out.ConsistencyLevel = args.QueryOptions.ConsistencyLevel() // Filter to only passing if specified if _, ok := params[api.HealthPassing]; ok { val := params.Get(api.HealthPassing) // Backwards-compat to allow users to specify ?passing without a value. This // should be removed in Consul 0.10. var filter bool if val == "" { filter = true } else { var err error filter, err = strconv.ParseBool(val) if err != nil { resp.WriteHeader(http.StatusBadRequest) fmt.Fprint(resp, "Invalid value for ?passing") return nil, nil } } if filter { out.Nodes = filterNonPassing(out.Nodes) } } // Translate addresses after filtering so we don't waste effort. s.agent.TranslateAddresses(args.Datacenter, out.Nodes, TranslateAddressAcceptAny) // Use empty list instead of nil if out.Nodes == nil { out.Nodes = make(structs.CheckServiceNodes, 0) } for i := range out.Nodes { if out.Nodes[i].Checks == nil { out.Nodes[i].Checks = make(structs.HealthChecks, 0) } for j, c := range out.Nodes[i].Checks { if c.ServiceTags == nil { clone := *c clone.ServiceTags = make([]string, 0) out.Nodes[i].Checks[j] = &clone } } if out.Nodes[i].Service != nil && out.Nodes[i].Service.Tags == nil { clone := *out.Nodes[i].Service clone.Tags = make([]string, 0) out.Nodes[i].Service = &clone } } return out.Nodes, nil } // filterNonPassing is used to filter out any nodes that have check that are not passing func filterNonPassing(nodes structs.CheckServiceNodes) structs.CheckServiceNodes { n := len(nodes) // Make a copy of the cached nodes rather than operating on the cache directly out := append(nodes[:0:0], nodes...) OUTER: for i := 0; i < n; i++ { node := out[i] for _, check := range node.Checks { if check.Status != api.HealthPassing { out[i], out[n-1] = out[n-1], structs.CheckServiceNode{} n-- i-- continue OUTER } } } return out[:n] }