302 lines
8.7 KiB
Go
302 lines
8.7 KiB
Go
package agent
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import (
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"fmt"
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"net/http"
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"sort"
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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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// metaExternalSource is the key name for the service instance meta that
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// defines the external syncing source. This is used by the UI APIs below
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// to extract this.
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const metaExternalSource = "external-source"
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type GatewayConfig struct {
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ListenerPort int
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}
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// ServiceSummary is used to summarize a service
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type ServiceSummary struct {
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Kind structs.ServiceKind `json:",omitempty"`
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Name string
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Tags []string
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Nodes []string
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InstanceCount int
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ProxyFor []string `json:",omitempty"`
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proxyForSet map[string]struct{} // internal to track uniqueness
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ChecksPassing int
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ChecksWarning int
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ChecksCritical int
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ExternalSources []string
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externalSourceSet map[string]struct{} // internal to track uniqueness
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GatewayConfig GatewayConfig `json:",omitempty"`
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structs.EnterpriseMeta
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}
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// UINodes is used to list the nodes in a given datacenter. We return a
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// NodeDump which provides overview information for all the nodes
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func (s *HTTPServer) UINodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Parse arguments
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args := structs.DCSpecificRequest{}
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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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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.parseFilter(req, &args.Filter)
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// Make the RPC request
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var out structs.IndexedNodeDump
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defer setMeta(resp, &out.QueryMeta)
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RPC:
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if err := s.agent.RPC("Internal.NodeDump", &args, &out); err != nil {
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// Retry the request allowing stale data if no leader
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if strings.Contains(err.Error(), structs.ErrNoLeader.Error()) && !args.AllowStale {
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args.AllowStale = true
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goto RPC
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}
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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 _, info := range out.Dump {
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if info.Services == nil {
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info.Services = make([]*structs.NodeService, 0)
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}
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if info.Checks == nil {
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info.Checks = make([]*structs.HealthCheck, 0)
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}
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}
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if out.Dump == nil {
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out.Dump = make(structs.NodeDump, 0)
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}
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return out.Dump, nil
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}
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// UINodeInfo is used to get info on a single node in a given datacenter. We return a
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// NodeInfo which provides overview information for the node
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func (s *HTTPServer) UINodeInfo(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Parse arguments
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args := structs.NodeSpecificRequest{}
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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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if err := s.parseEntMeta(req, &args.EnterpriseMeta); err != nil {
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return nil, err
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}
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// Verify we have some DC, or use the default
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args.Node = strings.TrimPrefix(req.URL.Path, "/v1/internal/ui/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.IndexedNodeDump
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defer setMeta(resp, &out.QueryMeta)
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RPC:
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if err := s.agent.RPC("Internal.NodeInfo", &args, &out); err != nil {
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// Retry the request allowing stale data if no leader
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if strings.Contains(err.Error(), structs.ErrNoLeader.Error()) && !args.AllowStale {
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args.AllowStale = true
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goto RPC
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}
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return nil, err
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}
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// Return only the first entry
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if len(out.Dump) > 0 {
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info := out.Dump[0]
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if info.Services == nil {
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info.Services = make([]*structs.NodeService, 0)
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}
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if info.Checks == nil {
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info.Checks = make([]*structs.HealthCheck, 0)
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}
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return info, nil
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}
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resp.WriteHeader(http.StatusNotFound)
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return nil, nil
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}
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// UIServices is used to list the services in a given datacenter. We return a
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// ServiceSummary which provides overview information for the service
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func (s *HTTPServer) UIServices(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Parse arguments
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args := structs.ServiceDumpRequest{}
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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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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.parseFilter(req, &args.Filter)
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// Make the RPC request
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var out structs.IndexedCheckServiceNodes
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defer setMeta(resp, &out.QueryMeta)
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RPC:
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if err := s.agent.RPC("Internal.ServiceDump", &args, &out); err != nil {
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// Retry the request allowing stale data if no leader
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if strings.Contains(err.Error(), structs.ErrNoLeader.Error()) && !args.AllowStale {
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args.AllowStale = true
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goto RPC
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}
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return nil, err
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}
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// Generate the summary
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// TODO (gateways) (freddy) Have Internal.ServiceDump return ServiceDump instead. Need to add bexpr filtering for type.
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return summarizeServices(out.Nodes.ToServiceDump()), nil
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}
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// UIGatewayServices is used to query all the nodes for services associated with a gateway along with their gateway config
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func (s *HTTPServer) UIGatewayServicesNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
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// Parse arguments
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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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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/internal/ui/gateway-services-nodes/")
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if args.ServiceName == "" {
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resp.WriteHeader(http.StatusBadRequest)
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fmt.Fprint(resp, "Missing gateway 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.IndexedServiceDump
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defer setMeta(resp, &out.QueryMeta)
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RPC:
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if err := s.agent.RPC("Internal.GatewayServiceDump", &args, &out); err != nil {
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// Retry the request allowing stale data if no leader
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if strings.Contains(err.Error(), structs.ErrNoLeader.Error()) && !args.AllowStale {
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args.AllowStale = true
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goto RPC
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}
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return nil, err
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}
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return summarizeServices(out.Dump), nil
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}
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func summarizeServices(dump structs.ServiceDump) []*ServiceSummary {
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// Collect the summary information
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var services []structs.ServiceID
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summary := make(map[structs.ServiceID]*ServiceSummary)
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getService := func(service structs.ServiceID) *ServiceSummary {
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serv, ok := summary[service]
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if !ok {
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serv = &ServiceSummary{
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Name: service.ID,
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EnterpriseMeta: service.EnterpriseMeta,
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// the other code will increment this unconditionally so we
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// shouldn't initialize it to 1
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InstanceCount: 0,
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}
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summary[service] = serv
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services = append(services, service)
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}
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return serv
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}
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for _, csn := range dump {
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if csn.GatewayService != nil {
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sum := getService(csn.GatewayService.Service.ToServiceID())
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sum.GatewayConfig.ListenerPort = csn.GatewayService.Port
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}
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// Will happen in cases where we only have the GatewayServices mapping
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if csn.Service == nil {
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continue
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}
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sid := structs.NewServiceID(csn.Service.Service, &csn.Service.EnterpriseMeta)
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sum := getService(sid)
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svc := csn.Service
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sum.Nodes = append(sum.Nodes, csn.Node.Node)
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sum.Kind = svc.Kind
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sum.InstanceCount += 1
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if svc.Kind == structs.ServiceKindConnectProxy {
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if _, ok := sum.proxyForSet[svc.Proxy.DestinationServiceName]; !ok {
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if sum.proxyForSet == nil {
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sum.proxyForSet = make(map[string]struct{})
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}
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sum.proxyForSet[svc.Proxy.DestinationServiceName] = struct{}{}
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sum.ProxyFor = append(sum.ProxyFor, svc.Proxy.DestinationServiceName)
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}
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}
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for _, tag := range svc.Tags {
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found := false
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for _, existing := range sum.Tags {
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if existing == tag {
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found = true
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break
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}
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}
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if !found {
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sum.Tags = append(sum.Tags, tag)
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}
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}
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// If there is an external source, add it to the list of external
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// sources. We only want to add unique sources so there is extra
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// accounting here with an unexported field to maintain the set
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// of sources.
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if len(svc.Meta) > 0 && svc.Meta[metaExternalSource] != "" {
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source := svc.Meta[metaExternalSource]
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if sum.externalSourceSet == nil {
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sum.externalSourceSet = make(map[string]struct{})
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}
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if _, ok := sum.externalSourceSet[source]; !ok {
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sum.externalSourceSet[source] = struct{}{}
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sum.ExternalSources = append(sum.ExternalSources, source)
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}
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}
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for _, check := range csn.Checks {
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switch check.Status {
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case api.HealthPassing:
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sum.ChecksPassing++
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case api.HealthWarning:
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sum.ChecksWarning++
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case api.HealthCritical:
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sum.ChecksCritical++
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}
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}
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}
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// Return the services in sorted order
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sort.Slice(services, func(i, j int) bool {
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return services[i].LessThan(&services[j])
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})
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output := make([]*ServiceSummary, len(summary))
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for idx, service := range services {
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// Sort the nodes and tags
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sum := summary[service]
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sort.Strings(sum.Nodes)
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sort.Strings(sum.Tags)
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output[idx] = sum
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}
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return output
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}
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