forked from hashicorp/consul
/
debug.go
106 lines (86 loc) · 2.71 KB
/
debug.go
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package api
import (
"fmt"
"io/ioutil"
"strconv"
)
// Debug can be used to query the /debug/pprof endpoints to gather
// profiling information about the target agent.Debug
//
// The agent must have enable_debug set to true for profiling to be enabled
// and for these endpoints to function.
type Debug struct {
c *Client
}
// Debug returns a handle that exposes the internal debug endpoints.
func (c *Client) Debug() *Debug {
return &Debug{c}
}
// Heap returns a pprof heap dump
func (d *Debug) Heap() ([]byte, error) {
r := d.c.newRequest("GET", "/debug/pprof/heap")
_, resp, err := d.c.doRequest(r)
if err != nil {
return nil, fmt.Errorf("error making request: %s", err)
}
defer resp.Body.Close()
// We return a raw response because we're just passing through a response
// from the pprof handlers
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("error decoding body: %s", err)
}
return body, nil
}
// Profile returns a pprof CPU profile for the specified number of seconds
func (d *Debug) Profile(seconds int) ([]byte, error) {
r := d.c.newRequest("GET", "/debug/pprof/profile")
// Capture a profile for the specified number of seconds
r.params.Set("seconds", strconv.Itoa(seconds))
_, resp, err := d.c.doRequest(r)
if err != nil {
return nil, fmt.Errorf("error making request: %s", err)
}
defer resp.Body.Close()
// We return a raw response because we're just passing through a response
// from the pprof handlers
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("error decoding body: %s", err)
}
return body, nil
}
// Trace returns an execution trace
func (d *Debug) Trace(seconds int) ([]byte, error) {
r := d.c.newRequest("GET", "/debug/pprof/trace")
// Capture a trace for the specified number of seconds
r.params.Set("seconds", strconv.Itoa(seconds))
_, resp, err := d.c.doRequest(r)
if err != nil {
return nil, fmt.Errorf("error making request: %s", err)
}
defer resp.Body.Close()
// We return a raw response because we're just passing through a response
// from the pprof handlers
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("error decoding body: %s", err)
}
return body, nil
}
// Goroutine returns a pprof goroutine profile
func (d *Debug) Goroutine() ([]byte, error) {
r := d.c.newRequest("GET", "/debug/pprof/goroutine")
_, resp, err := d.c.doRequest(r)
if err != nil {
return nil, fmt.Errorf("error making request: %s", err)
}
defer resp.Body.Close()
// We return a raw response because we're just passing through a response
// from the pprof handlers
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("error decoding body: %s", err)
}
return body, nil
}