mirror of https://github.com/hashicorp/consul
333 lines
9.5 KiB
Go
333 lines
9.5 KiB
Go
package agent
|
|
|
|
import (
|
|
"fmt"
|
|
"net/http"
|
|
"net/url"
|
|
"strconv"
|
|
"strings"
|
|
|
|
cachetype "github.com/hashicorp/consul/agent/cache-types"
|
|
"github.com/hashicorp/consul/agent/structs"
|
|
"github.com/hashicorp/consul/api"
|
|
)
|
|
|
|
const (
|
|
serviceHealth = "service"
|
|
connectHealth = "connect"
|
|
ingressHealth = "ingress"
|
|
)
|
|
|
|
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.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
|
|
}
|
|
|
|
// 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
|
|
}
|
|
|
|
// HealthIngressServiceNodes should return "all the healthy ingress gateway instances
|
|
// that I can use to access this connect-enabled service without mTLS".
|
|
func (s *HTTPServer) HealthIngressServiceNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
|
|
return s.healthServiceNodes(resp, req, ingressHealth)
|
|
}
|
|
|
|
// HealthConnectServiceNodes should return "all healthy connect-enabled
|
|
// endpoints (e.g. could be side car proxies or native instances) for this
|
|
// service so I can connect with mTLS".
|
|
func (s *HTTPServer) HealthConnectServiceNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
|
|
return s.healthServiceNodes(resp, req, connectHealth)
|
|
}
|
|
|
|
// HealthServiceNodes should return "all the healthy instances of this service
|
|
// registered so I can connect directly to them".
|
|
func (s *HTTPServer) HealthServiceNodes(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
|
|
return s.healthServiceNodes(resp, req, serviceHealth)
|
|
}
|
|
|
|
func (s *HTTPServer) healthServiceNodes(resp http.ResponseWriter, req *http.Request, healthType string) (interface{}, error) {
|
|
// Set default DC
|
|
args := structs.ServiceSpecificRequest{}
|
|
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 tags
|
|
params := req.URL.Query()
|
|
if _, ok := params["tag"]; ok {
|
|
args.ServiceTags = params["tag"]
|
|
args.TagFilter = true
|
|
}
|
|
|
|
// Determine the prefix
|
|
var prefix string
|
|
switch healthType {
|
|
case connectHealth:
|
|
prefix = "/v1/health/connect/"
|
|
args.Connect = true
|
|
case ingressHealth:
|
|
prefix = "/v1/health/ingress/"
|
|
args.Ingress = true
|
|
default:
|
|
// serviceHealth is the default type
|
|
prefix = "/v1/health/service/"
|
|
}
|
|
|
|
// 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 s.agent.config.HTTPUseCache && args.QueryOptions.UseCache {
|
|
raw, m, err := s.agent.cache.Get(req.Context(), 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
|
|
filter, err := getBoolQueryParam(params, api.HealthPassing)
|
|
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
|
|
}
|
|
|
|
func getBoolQueryParam(params url.Values, key string) (bool, error) {
|
|
var param bool
|
|
if _, ok := params[key]; ok {
|
|
val := params.Get(key)
|
|
// Orginally a comment declared this check should be removed after Consul
|
|
// 0.10, to no longer support using ?passing without a value. However, I
|
|
// think this is a reasonable experience for a user and so am keeping it
|
|
// here.
|
|
if val == "" {
|
|
param = true
|
|
} else {
|
|
var err error
|
|
param, err = strconv.ParseBool(val)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
}
|
|
}
|
|
return param, 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]
|
|
}
|