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health_endpoint.go
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/
health_endpoint.go
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package agent
import (
"net/http"
"strings"
"github.com/hashicorp/consul/consul/structs"
)
func (s *HTTPServer) HealthChecksInState(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
// Set default DC
args := structs.ChecksInStateRequest{}
s.parseSource(req, &args.Source)
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(400)
resp.Write([]byte("Missing check state"))
return nil, nil
}
// Make the RPC request
var out structs.IndexedHealthChecks
defer setMeta(resp, &out.QueryMeta)
if err := s.agent.RPC("Health.ChecksInState", &args, &out); err != nil {
return nil, err
}
// Use empty list instead of nil
if out.HealthChecks == nil {
out.HealthChecks = make(structs.HealthChecks, 0)
}
return out.HealthChecks, nil
}
func (s *HTTPServer) HealthNodeChecks(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
// Set default DC
args := structs.NodeSpecificRequest{}
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(400)
resp.Write([]byte("Missing node name"))
return nil, nil
}
// Make the RPC request
var out structs.IndexedHealthChecks
defer setMeta(resp, &out.QueryMeta)
if err := s.agent.RPC("Health.NodeChecks", &args, &out); err != nil {
return nil, err
}
// Use empty list instead of nil
if out.HealthChecks == nil {
out.HealthChecks = make(structs.HealthChecks, 0)
}
return out.HealthChecks, nil
}
func (s *HTTPServer) HealthServiceChecks(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
// Set default DC
args := structs.ServiceSpecificRequest{}
s.parseSource(req, &args.Source)
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(400)
resp.Write([]byte("Missing service name"))
return nil, nil
}
// Make the RPC request
var out structs.IndexedHealthChecks
defer setMeta(resp, &out.QueryMeta)
if err := s.agent.RPC("Health.ServiceChecks", &args, &out); err != nil {
return nil, err
}
// Use empty list instead of nil
if out.HealthChecks == nil {
out.HealthChecks = make(structs.HealthChecks, 0)
}
return out.HealthChecks, nil
}
func (s *HTTPServer) HealthServiceNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
// Set default DC
args := structs.ServiceSpecificRequest{}
s.parseSource(req, &args.Source)
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.ServiceTag = params.Get("tag")
args.TagFilter = true
}
// Pull out the service name
args.ServiceName = strings.TrimPrefix(req.URL.Path, "/v1/health/service/")
if args.ServiceName == "" {
resp.WriteHeader(400)
resp.Write([]byte("Missing service name"))
return nil, nil
}
// Make the RPC request
var out structs.IndexedCheckServiceNodes
defer setMeta(resp, &out.QueryMeta)
if err := s.agent.RPC("Health.ServiceNodes", &args, &out); err != nil {
return nil, err
}
// Filter to only passing if specified
if _, ok := params[structs.HealthPassing]; ok {
out.Nodes = filterNonPassing(out.Nodes)
}
// Translate addresses after filtering so we don't waste effort.
translateAddresses(s.agent.config, args.Datacenter, out.Nodes)
// Use empty list instead of nil
for i, _ := range out.Nodes {
// TODO (slackpad) It's lame that this isn't a slice of pointers
// but it's not a well-scoped change to fix this. We should
// change this at the next opportunity.
if out.Nodes[i].Checks == nil {
out.Nodes[i].Checks = make(structs.HealthChecks, 0)
}
}
if out.Nodes == nil {
out.Nodes = make(structs.CheckServiceNodes, 0)
}
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)
OUTER:
for i := 0; i < n; i++ {
node := nodes[i]
for _, check := range node.Checks {
if check.Status != structs.HealthPassing {
nodes[i], nodes[n-1] = nodes[n-1], structs.CheckServiceNode{}
n--
i--
continue OUTER
}
}
}
return nodes[:n]
}