open-nomad/command/agent/alloc_endpoint.go

134 lines
3.5 KiB
Go

package agent
import (
"fmt"
"net/http"
"strings"
"github.com/golang/snappy"
"github.com/hashicorp/nomad/nomad/structs"
)
const (
allocNotFoundErr = "allocation not found"
resourceNotFoundErr = "resource not found"
)
func (s *HTTPServer) AllocsRequest(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
if req.Method != "GET" {
return nil, CodedError(405, ErrInvalidMethod)
}
args := structs.AllocListRequest{}
if s.parse(resp, req, &args.Region, &args.QueryOptions) {
return nil, nil
}
var out structs.AllocListResponse
if err := s.agent.RPC("Alloc.List", &args, &out); err != nil {
return nil, err
}
setMeta(resp, &out.QueryMeta)
if out.Allocations == nil {
out.Allocations = make([]*structs.AllocListStub, 0)
}
return out.Allocations, nil
}
func (s *HTTPServer) AllocSpecificRequest(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
allocID := strings.TrimPrefix(req.URL.Path, "/v1/allocation/")
if req.Method != "GET" {
return nil, CodedError(405, ErrInvalidMethod)
}
args := structs.AllocSpecificRequest{
AllocID: allocID,
}
if s.parse(resp, req, &args.Region, &args.QueryOptions) {
return nil, nil
}
var out structs.SingleAllocResponse
if err := s.agent.RPC("Alloc.GetAlloc", &args, &out); err != nil {
return nil, err
}
setMeta(resp, &out.QueryMeta)
if out.Alloc == nil {
return nil, CodedError(404, "alloc not found")
}
// Decode the payload if there is any
alloc := out.Alloc
if alloc.Job != nil && len(alloc.Job.Payload) != 0 {
decoded, err := snappy.Decode(nil, alloc.Job.Payload)
if err != nil {
return nil, err
}
alloc = alloc.Copy()
alloc.Job.Payload = decoded
}
return alloc, nil
}
func (s *HTTPServer) ClientAllocRequest(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
if s.agent.client == nil {
return nil, clientNotRunning
}
reqSuffix := strings.TrimPrefix(req.URL.Path, "/v1/client/allocation/")
// tokenize the suffix of the path to get the alloc id and find the action
// invoked on the alloc id
tokens := strings.Split(reqSuffix, "/")
if len(tokens) != 2 {
return nil, CodedError(404, resourceNotFoundErr)
}
allocID := tokens[0]
switch tokens[1] {
case "stats":
return s.allocStats(allocID, resp, req)
case "snapshot":
return s.allocSnapshot(allocID, resp, req)
case "gc":
return s.allocGC(allocID, resp, req)
}
return nil, CodedError(404, resourceNotFoundErr)
}
func (s *HTTPServer) ClientGCRequest(resp http.ResponseWriter, req *http.Request) (interface{}, error) {
if s.agent.client == nil {
return nil, clientNotRunning
}
return nil, s.agent.Client().CollectAllAllocs()
}
func (s *HTTPServer) allocGC(allocID string, resp http.ResponseWriter, req *http.Request) (interface{}, error) {
return nil, s.agent.Client().CollectAllocation(allocID)
}
func (s *HTTPServer) allocSnapshot(allocID string, resp http.ResponseWriter, req *http.Request) (interface{}, error) {
allocFS, err := s.agent.Client().GetAllocFS(allocID)
if err != nil {
return nil, fmt.Errorf(allocNotFoundErr)
}
if err := allocFS.Snapshot(resp); err != nil {
return nil, fmt.Errorf("error making snapshot: %v", err)
}
return nil, nil
}
func (s *HTTPServer) allocStats(allocID string, resp http.ResponseWriter, req *http.Request) (interface{}, error) {
clientStats := s.agent.client.StatsReporter()
aStats, err := clientStats.GetAllocStats(allocID)
if err != nil {
return nil, err
}
task := req.URL.Query().Get("task")
return aStats.LatestAllocStats(task)
}