open-consul/agent/catalog_endpoint.go

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package agent
import (
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"fmt"
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"net/http"
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"strings"
"github.com/armon/go-metrics"
"github.com/armon/go-metrics/prometheus"
cachetype "github.com/hashicorp/consul/agent/cache-types"
"github.com/hashicorp/consul/agent/structs"
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)
var CatalogCounters = []prometheus.CounterDefinition{
{
Name: []string{"client", "api", "catalog_register"},
Help: "Increments whenever a Consul agent receives a catalog register request.",
},
{
Name: []string{"client", "rpc", "error", "catalog_register"},
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Help: "Increments whenever a Consul agent receives an RPC error for a catalog register request.",
},
{
Name: []string{"client", "api", "success", "catalog_register"},
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Help: "Increments whenever a Consul agent successfully responds to a catalog register request.",
},
{
Name: []string{"client", "api", "catalog_deregister"},
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Help: "Increments whenever a Consul agent receives a catalog deregister request.",
},
{
Name: []string{"client", "api", "catalog_datacenters"},
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Help: "Increments whenever a Consul agent receives a request to list datacenters in the catalog.",
},
{
Name: []string{"client", "rpc", "error", "catalog_deregister"},
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Help: "Increments whenever a Consul agent receives an RPC error for a catalog deregister request.",
},
{
Name: []string{"client", "api", "success", "catalog_nodes"},
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Help: "Increments whenever a Consul agent successfully responds to a request to list nodes.",
},
{
Name: []string{"client", "rpc", "error", "catalog_nodes"},
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Help: "Increments whenever a Consul agent receives an RPC error for a request to list nodes.",
},
{
Name: []string{"client", "api", "success", "catalog_deregister"},
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Help: "Increments whenever a Consul agent successfully responds to a catalog deregister request.",
},
{
Name: []string{"client", "rpc", "error", "catalog_datacenters"},
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Help: "Increments whenever a Consul agent receives an RPC error for a request to list datacenters.",
},
{
Name: []string{"client", "api", "success", "catalog_datacenters"},
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Help: "Increments whenever a Consul agent successfully responds to a request to list datacenters.",
},
{
Name: []string{"client", "api", "catalog_nodes"},
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Help: "Increments whenever a Consul agent receives a request to list nodes from the catalog.",
},
{
Name: []string{"client", "api", "catalog_services"},
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Help: "Increments whenever a Consul agent receives a request to list services from the catalog.",
},
{
Name: []string{"client", "rpc", "error", "catalog_services"},
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Help: "Increments whenever a Consul agent receives an RPC error for a request to list services.",
},
{
Name: []string{"client", "api", "success", "catalog_services"},
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Help: "Increments whenever a Consul agent successfully responds to a request to list services.",
},
{
Name: []string{"client", "api", "catalog_service_nodes"},
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Help: "Increments whenever a Consul agent receives a request to list nodes offering a service.",
},
{
Name: []string{"client", "rpc", "error", "catalog_service_nodes"},
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Help: "Increments whenever a Consul agent receives an RPC error for a request to list nodes offering a service.",
},
{
Name: []string{"client", "api", "success", "catalog_service_nodes"},
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Help: "Increments whenever a Consul agent successfully responds to a request to list nodes offering a service.",
},
{
Name: []string{"client", "api", "error", "catalog_service_nodes"},
Help: "Increments whenever a Consul agent receives an RPC error for request to list nodes offering a service.",
},
{
Name: []string{"client", "api", "catalog_node_services"},
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Help: "Increments whenever a Consul agent successfully responds to a request to list nodes offering a service.",
},
{
Name: []string{"client", "api", "success", "catalog_node_services"},
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Help: "Increments whenever a Consul agent successfully responds to a request to list services in a node.",
},
{
Name: []string{"client", "rpc", "error", "catalog_node_services"},
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Help: "Increments whenever a Consul agent receives an RPC error for a request to list services in a node.",
},
{
Name: []string{"client", "api", "catalog_node_service_list"},
Help: "Increments whenever a Consul agent receives a request to list a node's registered services.",
},
{
Name: []string{"client", "rpc", "error", "catalog_node_service_list"},
Help: "Increments whenever a Consul agent receives an RPC error for request to list a node's registered services.",
},
{
Name: []string{"client", "api", "success", "catalog_node_service_list"},
Help: "Increments whenever a Consul agent successfully responds to a request to list a node's registered services.",
},
{
Name: []string{"client", "api", "catalog_gateway_services"},
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Help: "Increments whenever a Consul agent receives a request to list services associated with a gateway.",
},
{
Name: []string{"client", "rpc", "error", "catalog_gateway_services"},
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Help: "Increments whenever a Consul agent receives an RPC error for a request to list services associated with a gateway.",
},
{
Name: []string{"client", "api", "success", "catalog_gateway_services"},
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Help: "Increments whenever a Consul agent successfully responds to a request to list services associated with a gateway.",
},
}
func (s *HTTPHandlers) CatalogRegister(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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metrics.IncrCounterWithLabels([]string{"client", "api", "catalog_register"}, 1,
s.nodeMetricsLabels())
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var args structs.RegisterRequest
if err := s.parseEntMetaNoWildcard(req, &args.EnterpriseMeta); err != nil {
return nil, err
}
if err := s.rewordUnknownEnterpriseFieldError(decodeBody(req.Body, &args)); err != nil {
return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: fmt.Sprintf("Request decode failed: %v", err)}
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}
// Setup the default DC if not provided
if args.Datacenter == "" {
args.Datacenter = s.agent.config.Datacenter
}
s.parseToken(req, &args.Token)
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// Forward to the servers
var out struct{}
if err := s.agent.RPC(req.Context(), "Catalog.Register", &args, &out); err != nil {
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metrics.IncrCounterWithLabels([]string{"client", "rpc", "error", "catalog_register"}, 1,
s.nodeMetricsLabels())
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return nil, err
}
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metrics.IncrCounterWithLabels([]string{"client", "api", "success", "catalog_register"}, 1,
s.nodeMetricsLabels())
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return true, nil
}
func (s *HTTPHandlers) CatalogDeregister(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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metrics.IncrCounterWithLabels([]string{"client", "api", "catalog_deregister"}, 1,
s.nodeMetricsLabels())
var args structs.DeregisterRequest
if err := s.parseEntMetaNoWildcard(req, &args.EnterpriseMeta); err != nil {
return nil, err
}
if err := s.rewordUnknownEnterpriseFieldError(decodeBody(req.Body, &args)); err != nil {
return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: fmt.Sprintf("Request decode failed: %v", err)}
}
// Setup the default DC if not provided
if args.Datacenter == "" {
args.Datacenter = s.agent.config.Datacenter
}
s.parseToken(req, &args.Token)
// Forward to the servers
var out struct{}
if err := s.agent.RPC(req.Context(), "Catalog.Deregister", &args, &out); err != nil {
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metrics.IncrCounterWithLabels([]string{"client", "rpc", "error", "catalog_deregister"}, 1,
s.nodeMetricsLabels())
return nil, err
}
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metrics.IncrCounterWithLabels([]string{"client", "api", "success", "catalog_deregister"}, 1,
s.nodeMetricsLabels())
return true, nil
}
func (s *HTTPHandlers) CatalogDatacenters(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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metrics.IncrCounterWithLabels([]string{"client", "api", "catalog_datacenters"}, 1,
s.nodeMetricsLabels())
args := structs.DatacentersRequest{}
s.parseConsistency(resp, req, &args.QueryOptions)
parseCacheControl(resp, req, &args.QueryOptions)
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var out []string
if args.QueryOptions.UseCache {
raw, m, err := s.agent.cache.Get(req.Context(), cachetype.CatalogDatacentersName, &args)
if err != nil {
metrics.IncrCounterWithLabels([]string{"client", "rpc", "error", "catalog_datacenters"}, 1,
s.nodeMetricsLabels())
return nil, err
}
reply, ok := raw.(*[]string)
if !ok {
// This should never happen, but we want to protect against panics
return nil, fmt.Errorf("internal error: response type not correct")
}
defer setCacheMeta(resp, &m)
out = *reply
} else {
if err := s.agent.RPC(req.Context(), "Catalog.ListDatacenters", &args, &out); err != nil {
metrics.IncrCounterWithLabels([]string{"client", "rpc", "error", "catalog_datacenters"}, 1,
s.nodeMetricsLabels())
return nil, err
}
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}
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metrics.IncrCounterWithLabels([]string{"client", "api", "success", "catalog_datacenters"}, 1,
s.nodeMetricsLabels())
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return out, nil
}
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func (s *HTTPHandlers) CatalogNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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metrics.IncrCounterWithLabels([]string{"client", "api", "catalog_nodes"}, 1,
s.nodeMetricsLabels())
// Setup the request
args := structs.DCSpecificRequest{}
s.parseSource(req, &args.Source)
if err := s.parseEntMetaPartition(req, &args.EnterpriseMeta); err != nil {
return nil, err
}
args.NodeMetaFilters = s.parseMetaFilter(req)
if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
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metrics.IncrCounterWithLabels([]string{"client", "rpc", "error", "catalog_nodes"}, 1,
s.nodeMetricsLabels())
return nil, nil
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}
var out structs.IndexedNodes
defer setMeta(resp, &out.QueryMeta)
RETRY_ONCE:
if err := s.agent.RPC(req.Context(), "Catalog.ListNodes", &args, &out); err != nil {
return nil, err
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}
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()
s.agent.TranslateAddresses(args.Datacenter, out.Nodes, TranslateAddressAcceptAny)
// Use empty list instead of nil
if out.Nodes == nil {
out.Nodes = make(structs.Nodes, 0)
}
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metrics.IncrCounterWithLabels([]string{"client", "api", "success", "catalog_nodes"}, 1,
s.nodeMetricsLabels())
return out.Nodes, nil
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}
func (s *HTTPHandlers) CatalogServices(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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metrics.IncrCounterWithLabels([]string{"client", "api", "catalog_services"}, 1,
s.nodeMetricsLabels())
args := structs.DCSpecificRequest{}
if err := s.parseEntMetaNoWildcard(req, &args.EnterpriseMeta); err != nil {
return nil, err
}
args.NodeMetaFilters = s.parseMetaFilter(req)
if done := s.parse(resp, req, &args.Datacenter, &args.QueryOptions); done {
return nil, nil
}
var out structs.IndexedServices
defer setMeta(resp, &out.QueryMeta)
if args.QueryOptions.UseCache {
raw, m, err := s.agent.cache.Get(req.Context(), cachetype.CatalogListServicesName, &args)
if err != nil {
metrics.IncrCounterWithLabels([]string{"client", "rpc", "error", "catalog_services"}, 1,
s.nodeMetricsLabels())
return nil, err
}
reply, ok := raw.(*structs.IndexedServices)
if !ok {
// This should never happen, but we want to protect against panics
return nil, fmt.Errorf("internal error: response type not correct")
}
defer setCacheMeta(resp, &m)
out = *reply
} else {
RETRY_ONCE:
if err := s.agent.RPC(req.Context(), "Catalog.ListServices", &args, &out); err != nil {
metrics.IncrCounterWithLabels([]string{"client", "rpc", "error", "catalog_services"}, 1,
s.nodeMetricsLabels())
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()
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// Use empty map instead of nil
if out.Services == nil {
out.Services = make(structs.Services)
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}
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metrics.IncrCounterWithLabels([]string{"client", "api", "success", "catalog_services"}, 1,
s.nodeMetricsLabels())
return out.Services, nil
}
func (s *HTTPHandlers) CatalogConnectServiceNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
return s.catalogServiceNodes(resp, req, true)
}
func (s *HTTPHandlers) CatalogServiceNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
return s.catalogServiceNodes(resp, req, false)
}
func (s *HTTPHandlers) catalogServiceNodes(resp http.ResponseWriter, req *http.Request, connect bool) (interface{}, error) {
metricsKey := "catalog_service_nodes"
pathPrefix := "/v1/catalog/service/"
if connect {
metricsKey = "catalog_connect_service_nodes"
pathPrefix = "/v1/catalog/connect/"
}
metrics.IncrCounterWithLabels([]string{"client", "api", metricsKey}, 1,
s.nodeMetricsLabels())
args := structs.ServiceSpecificRequest{Connect: connect}
if err := s.parseEntMetaNoWildcard(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 a tag
params := req.URL.Query()
if _, ok := params["tag"]; ok {
args.ServiceTags = params["tag"]
args.TagFilter = true
}
if _, ok := params["merge-central-config"]; ok {
args.MergeCentralConfig = true
}
// Pull out the service name
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args.ServiceName = strings.TrimPrefix(req.URL.Path, pathPrefix)
if args.ServiceName == "" {
return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: "Missing service name"}
}
// Make the RPC request
var out structs.IndexedServiceNodes
defer setMeta(resp, &out.QueryMeta)
if args.QueryOptions.UseCache {
raw, m, err := s.agent.cache.Get(req.Context(), cachetype.CatalogServicesName, &args)
if err != nil {
metrics.IncrCounterWithLabels([]string{"client", "rpc", "error", "catalog_service_nodes"}, 1,
s.nodeMetricsLabels())
return nil, err
}
defer setCacheMeta(resp, &m)
reply, ok := raw.(*structs.IndexedServiceNodes)
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(req.Context(), "Catalog.ServiceNodes", &args, &out); err != nil {
metrics.IncrCounterWithLabels([]string{"client", "rpc", "error", "catalog_service_nodes"}, 1,
s.nodeMetricsLabels())
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()
s.agent.TranslateAddresses(args.Datacenter, out.ServiceNodes, TranslateAddressAcceptAny)
// Use empty list instead of nil
if out.ServiceNodes == nil {
out.ServiceNodes = make(structs.ServiceNodes, 0)
}
for i, s := range out.ServiceNodes {
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if s.ServiceTags == nil {
clone := *s
clone.ServiceTags = make([]string, 0)
out.ServiceNodes[i] = &clone
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}
}
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metrics.IncrCounterWithLabels([]string{"client", "api", "success", "catalog_service_nodes"}, 1,
s.nodeMetricsLabels())
return out.ServiceNodes, nil
}
func (s *HTTPHandlers) CatalogNodeServices(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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metrics.IncrCounterWithLabels([]string{"client", "api", "catalog_node_services"}, 1,
s.nodeMetricsLabels())
// Set default Datacenter
args := structs.NodeSpecificRequest{}
if err := s.parseEntMetaNoWildcard(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 node name
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args.Node = strings.TrimPrefix(req.URL.Path, "/v1/catalog/node/")
if args.Node == "" {
return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: "Missing node name"}
}
// Make the RPC request
var out structs.IndexedNodeServices
defer setMeta(resp, &out.QueryMeta)
RETRY_ONCE:
if err := s.agent.RPC(req.Context(), "Catalog.NodeServices", &args, &out); err != nil {
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metrics.IncrCounterWithLabels([]string{"client", "rpc", "error", "catalog_node_services"}, 1,
s.nodeMetricsLabels())
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()
if out.NodeServices != nil {
s.agent.TranslateAddresses(args.Datacenter, out.NodeServices, TranslateAddressAcceptAny)
}
// TODO: The NodeServices object in IndexedNodeServices is a pointer to
// something that's created for each request by the state store way down
// in https://github.com/hashicorp/consul/blob/v1.0.4/agent/consul/state/catalog.go#L953-L963.
// Since this isn't a pointer to a real state store object, it's safe to
// modify out.NodeServices.Services in the loop below without making a
// copy here. Same for the Tags in each service entry, since that was
// created by .ToNodeService() which made a copy. This is safe as-is but
// this whole business is tricky and subtle. See #3867 for more context.
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// Use empty list instead of nil
if out.NodeServices != nil {
for _, s := range out.NodeServices.Services {
if s.Tags == nil {
s.Tags = make([]string, 0)
}
}
}
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metrics.IncrCounterWithLabels([]string{"client", "api", "success", "catalog_node_services"}, 1,
s.nodeMetricsLabels())
return out.NodeServices, nil
}
func (s *HTTPHandlers) CatalogNodeServiceList(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
metrics.IncrCounterWithLabels([]string{"client", "api", "catalog_node_service_list"}, 1,
s.nodeMetricsLabels())
// Set default Datacenter
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 node name
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args.Node = strings.TrimPrefix(req.URL.Path, "/v1/catalog/node-services/")
if args.Node == "" {
return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: "Missing node name"}
}
if _, ok := req.URL.Query()["merge-central-config"]; ok {
args.MergeCentralConfig = true
}
// Make the RPC request
var out structs.IndexedNodeServiceList
defer setMeta(resp, &out.QueryMeta)
RETRY_ONCE:
if err := s.agent.RPC(req.Context(), "Catalog.NodeServiceList", &args, &out); err != nil {
metrics.IncrCounterWithLabels([]string{"client", "rpc", "error", "catalog_node_service_list"}, 1,
s.nodeMetricsLabels())
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()
s.agent.TranslateAddresses(args.Datacenter, &out.NodeServices, TranslateAddressAcceptAny)
// Use empty list instead of nil
for _, s := range out.NodeServices.Services {
if s.Tags == nil {
s.Tags = make([]string, 0)
}
}
metrics.IncrCounterWithLabels([]string{"client", "api", "success", "catalog_node_service_list"}, 1,
s.nodeMetricsLabels())
return &out.NodeServices, nil
}
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func (s *HTTPHandlers) CatalogGatewayServices(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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metrics.IncrCounterWithLabels([]string{"client", "api", "catalog_gateway_services"}, 1,
s.nodeMetricsLabels())
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var args structs.ServiceSpecificRequest
if err := s.parseEntMetaNoWildcard(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 gateway's service name
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args.ServiceName = strings.TrimPrefix(req.URL.Path, "/v1/catalog/gateway-services/")
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if args.ServiceName == "" {
return nil, HTTPError{StatusCode: http.StatusBadRequest, Reason: "Missing gateway name"}
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}
// Make the RPC request
var out structs.IndexedGatewayServices
defer setMeta(resp, &out.QueryMeta)
RETRY_ONCE:
if err := s.agent.RPC(req.Context(), "Catalog.GatewayServices", &args, &out); err != nil {
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metrics.IncrCounterWithLabels([]string{"client", "rpc", "error", "catalog_gateway_services"}, 1,
s.nodeMetricsLabels())
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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()
metrics.IncrCounterWithLabels([]string{"client", "api", "success", "catalog_gateway_services"}, 1,
s.nodeMetricsLabels())
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return out.Services, nil
}